first commit

Podfile

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+# Uncomment the next line to define a global platform for your project
+# platform :ios, '9.0'
+
+target 'naiyoup' do
+  # Comment the next line if you don't want to use dynamic frameworks
+  use_frameworks!
+
+  # Pods for naiyoup
+  pod 'HandyJSON'
+  pod 'IQKeyboardManagerSwift'
+  pod 'SwiftyUserDefaults'
+  pod 'XCGLogger'
+  pod 'Alamofire'
+  pod 'MBProgressHUD'
+end

Podfile.lock

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+PODS:
+  - Alamofire (5.4.3)
+  - HandyJSON (5.0.2)
+  - IQKeyboardManagerSwift (6.5.6)
+  - MBProgressHUD (1.2.0)
+  - ObjcExceptionBridging (1.0.1):
+    - ObjcExceptionBridging/ObjcExceptionBridging (= 1.0.1)
+  - ObjcExceptionBridging/ObjcExceptionBridging (1.0.1)
+  - SwiftyUserDefaults (5.3.0)
+  - XCGLogger (7.0.1):
+    - XCGLogger/Core (= 7.0.1)
+  - XCGLogger/Core (7.0.1):
+    - ObjcExceptionBridging
+
+DEPENDENCIES:
+  - Alamofire
+  - HandyJSON
+  - IQKeyboardManagerSwift
+  - MBProgressHUD
+  - SwiftyUserDefaults
+  - XCGLogger
+
+SPEC REPOS:
+  trunk:
+    - Alamofire
+    - HandyJSON
+    - IQKeyboardManagerSwift
+    - MBProgressHUD
+    - ObjcExceptionBridging
+    - SwiftyUserDefaults
+    - XCGLogger
+
+SPEC CHECKSUMS:
+  Alamofire: e447a2774a40c996748296fa2c55112fdbbc42f9
+  HandyJSON: 9e4e236f5d2dbefad5155a77417bbea438201c03
+  IQKeyboardManagerSwift: c7df9d2deb356c04522f5c4b7b6e4ce4d8ed94fe
+  MBProgressHUD: 3ee5efcc380f6a79a7cc9b363dd669c5e1ae7406
+  ObjcExceptionBridging: c30e00eb3700467e695faeea30e26e18bd445001
+  SwiftyUserDefaults: 63f80248cf5bfb3458825d9a78f2eb7e1293a040
+  XCGLogger: 1943831ef907df55108b0b18657953f868de973b
+
+PODFILE CHECKSUM: 2f286686f3b48070723fd48bff57c7201a434b4c
+
+COCOAPODS: 1.10.1

Pods/Alamofire/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2014-2021 Alamofire Software Foundation (http://alamofire.org/)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Pods/Alamofire/README.md

@@ -0,0 +1,206 @@
+![Alamofire: Elegant Networking in Swift](https://raw.githubusercontent.com/Alamofire/Alamofire/master/alamofire.png)
+
+[![Build Status](https://github.com/Alamofire/Alamofire/workflows/Alamofire%20CI/badge.svg?branch=master)](https://github.com/Alamofire/Alamofire/actions)
+[![CocoaPods Compatible](https://img.shields.io/cocoapods/v/Alamofire.svg)](https://img.shields.io/cocoapods/v/Alamofire.svg)
+[![Carthage Compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+[![Platform](https://img.shields.io/cocoapods/p/Alamofire.svg?style=flat)](https://alamofire.github.io/Alamofire)
+[![Twitter](https://img.shields.io/badge/twitter-@AlamofireSF-blue.svg?style=flat)](https://twitter.com/AlamofireSF)
+[![Gitter](https://badges.gitter.im/Alamofire/Alamofire.svg)](https://gitter.im/Alamofire/Alamofire?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[![Open Source Helpers](https://www.codetriage.com/alamofire/alamofire/badges/users.svg)](https://www.codetriage.com/alamofire/alamofire)
+
+Alamofire is an HTTP networking library written in Swift.
+
+- [Features](#features)
+- [Component Libraries](#component-libraries)
+- [Requirements](#requirements)
+- [Migration Guides](#migration-guides)
+- [Communication](#communication)
+- [Installation](#installation)
+- [Usage](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#using-alamofire)
+    - [**Introduction -**](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#introduction) [Making Requests](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#making-requests), [Response Handling](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#response-handling), [Response Validation](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#response-validation), [Response Caching](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#response-caching)
+	- **HTTP -** [HTTP Methods](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#http-methods), [Parameters and Parameter Encoder](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md##request-parameters-and-parameter-encoders), [HTTP Headers](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#http-headers), [Authentication](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#authentication)
+	- **Large Data -** [Downloading Data to a File](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#downloading-data-to-a-file), [Uploading Data to a Server](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#uploading-data-to-a-server)
+	- **Tools -** [Statistical Metrics](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#statistical-metrics), [cURL Command Output](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Usage.md#curl-command-output)
+- [Advanced Usage](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md)
+	- **URL Session -** [Session Manager](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#session), [Session Delegate](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#sessiondelegate), [Request](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#request)
+	- **Routing -** [Routing Requests](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#routing-requests), [Adapting and Retrying Requests](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#adapting-and-retrying-requests-with-requestinterceptor)
+	- **Model Objects -** [Custom Response Handlers](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#customizing-response-handlers)
+	- **Connection -** [Security](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#security), [Network Reachability](https://github.com/Alamofire/Alamofire/blob/master/Documentation/AdvancedUsage.md#network-reachability)
+- [Open Radars](#open-radars)
+- [FAQ](#faq)
+- [Credits](#credits)
+- [Donations](#donations)
+- [License](#license)
+
+## Features
+
+- [x] Chainable Request / Response Methods
+- [x] Combine Support
+- [x] URL / JSON Parameter Encoding
+- [x] Upload File / Data / Stream / MultipartFormData
+- [x] Download File using Request or Resume Data
+- [x] Authentication with `URLCredential`
+- [x] HTTP Response Validation
+- [x] Upload and Download Progress Closures with Progress
+- [x] cURL Command Output
+- [x] Dynamically Adapt and Retry Requests
+- [x] TLS Certificate and Public Key Pinning
+- [x] Network Reachability
+- [x] Comprehensive Unit and Integration Test Coverage
+- [x] [Complete Documentation](https://alamofire.github.io/Alamofire)
+
+## Component Libraries
+
+In order to keep Alamofire focused specifically on core networking implementations, additional component libraries have been created by the [Alamofire Software Foundation](https://github.com/Alamofire/Foundation) to bring additional functionality to the Alamofire ecosystem.
+
+- [AlamofireImage](https://github.com/Alamofire/AlamofireImage) - An image library including image response serializers, `UIImage` and `UIImageView` extensions, custom image filters, an auto-purging in-memory cache, and a priority-based image downloading system.
+- [AlamofireNetworkActivityIndicator](https://github.com/Alamofire/AlamofireNetworkActivityIndicator) - Controls the visibility of the network activity indicator on iOS using Alamofire. It contains configurable delay timers to help mitigate flicker and can support `URLSession` instances not managed by Alamofire.
+
+## Requirements
+
+- iOS 10.0+ / macOS 10.12+ / tvOS 10.0+ / watchOS 3.0+
+- Xcode 11+
+- Swift 5.1+
+
+## Migration Guides
+
+- [Alamofire 5.0 Migration Guide](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Alamofire%205.0%20Migration%20Guide.md)
+- [Alamofire 4.0 Migration Guide](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Alamofire%204.0%20Migration%20Guide.md)
+- [Alamofire 3.0 Migration Guide](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Alamofire%203.0%20Migration%20Guide.md)
+- [Alamofire 2.0 Migration Guide](https://github.com/Alamofire/Alamofire/blob/master/Documentation/Alamofire%202.0%20Migration%20Guide.md)
+
+## Communication
+- If you **need help with making network requests** using Alamofire, use [Stack Overflow](https://stackoverflow.com/questions/tagged/alamofire) and tag `alamofire`.
+- If you need to **find or understand an API**, check [our documentation](http://alamofire.github.io/Alamofire/) or [Apple's documentation for `URLSession`](https://developer.apple.com/documentation/foundation/url_loading_system), on top of which Alamofire is built.
+- If you need **help with an Alamofire feature**, use [our forum on swift.org](https://forums.swift.org/c/related-projects/alamofire).
+- If you'd like to **discuss Alamofire best practices**, use [our forum on swift.org](https://forums.swift.org/c/related-projects/alamofire).
+- If you'd like to **discuss a feature request**, use [our forum on swift.org](https://forums.swift.org/c/related-projects/alamofire). 
+- If you **found a bug**, open an issue here on GitHub and follow the guide. The more detail the better!
+- If you **want to contribute**, submit a pull request!
+
+## Installation
+
+### CocoaPods
+
+[CocoaPods](https://cocoapods.org) is a dependency manager for Cocoa projects. For usage and installation instructions, visit their website. To integrate Alamofire into your Xcode project using CocoaPods, specify it in your `Podfile`:
+
+```ruby
+pod 'Alamofire', '~> 5.2'
+```
+
+### Carthage
+
+[Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks. To integrate Alamofire into your Xcode project using Carthage, specify it in your `Cartfile`:
+
+```ogdl
+github "Alamofire/Alamofire" ~> 5.2
+```
+
+### Swift Package Manager
+
+The [Swift Package Manager](https://swift.org/package-manager/) is a tool for automating the distribution of Swift code and is integrated into the `swift` compiler. It is in early development, but Alamofire does support its use on supported platforms.
+
+Once you have your Swift package set up, adding Alamofire as a dependency is as easy as adding it to the `dependencies` value of your `Package.swift`.
+
+```swift
+dependencies: [
+    .package(url: "https://github.com/Alamofire/Alamofire.git", .upToNextMajor(from: "5.2.0"))
+]
+```
+
+### Manually
+
+If you prefer not to use any of the aforementioned dependency managers, you can integrate Alamofire into your project manually.
+
+#### Embedded Framework
+
+- Open up Terminal, `cd` into your top-level project directory, and run the following command "if" your project is not initialized as a git repository:
+
+  ```bash
+  $ git init
+  ```
+
+- Add Alamofire as a git [submodule](https://git-scm.com/docs/git-submodule) by running the following command:
+
+  ```bash
+  $ git submodule add https://github.com/Alamofire/Alamofire.git
+  ```
+
+- Open the new `Alamofire` folder, and drag the `Alamofire.xcodeproj` into the Project Navigator of your application's Xcode project.
+
+    > It should appear nested underneath your application's blue project icon. Whether it is above or below all the other Xcode groups does not matter.
+
+- Select the `Alamofire.xcodeproj` in the Project Navigator and verify the deployment target matches that of your application target.
+- Next, select your application project in the Project Navigator (blue project icon) to navigate to the target configuration window and select the application target under the "Targets" heading in the sidebar.
+- In the tab bar at the top of that window, open the "General" panel.
+- Click on the `+` button under the "Embedded Binaries" section.
+- You will see two different `Alamofire.xcodeproj` folders each with two different versions of the `Alamofire.framework` nested inside a `Products` folder.
+
+    > It does not matter which `Products` folder you choose from, but it does matter whether you choose the top or bottom `Alamofire.framework`.
+
+- Select the top `Alamofire.framework` for iOS and the bottom one for macOS.
+
+    > You can verify which one you selected by inspecting the build log for your project. The build target for `Alamofire` will be listed as `Alamofire iOS`, `Alamofire macOS`, `Alamofire tvOS`, or `Alamofire watchOS`.
+
+- And that's it!
+
+  > The `Alamofire.framework` is automagically added as a target dependency, linked framework and embedded framework in a copy files build phase which is all you need to build on the simulator and a device.
+
+## Open Radars
+
+The following radars have some effect on the current implementation of Alamofire.
+
+- [`rdar://21349340`](http://www.openradar.me/radar?id=5517037090635776) - Compiler throwing warning due to toll-free bridging issue in the test case
+- `rdar://26870455` - Background URL Session Configurations do not work in the simulator
+- `rdar://26849668` - Some URLProtocol APIs do not properly handle `URLRequest`
+- `FB7624529` - `urlSession(_:task:didFinishCollecting:)` never called on watchOS
+
+## Resolved Radars
+
+The following radars have been resolved over time after being filed against the Alamofire project.
+
+- [`rdar://26761490`](http://www.openradar.me/radar?id=5010235949318144) - Swift string interpolation causing memory leak with common usage.
+  - (Resolved): 9/1/17 in Xcode 9 beta 6.
+- [`rdar://36082113`](http://openradar.appspot.com/radar?id=4942308441063424) - `URLSessionTaskMetrics` failing to link on watchOS 3.0+
+  - (Resolved): Just add `CFNetwork` to your linked frameworks.
+
+## Workarounds
+
+- Collection of `URLSessionTaskMetrics` is currently disabled on watchOS due to `FB7624529`.
+
+## FAQ
+
+### What's the origin of the name Alamofire?
+
+Alamofire is named after the [Alamo Fire flower](https://aggie-horticulture.tamu.edu/wildseed/alamofire.html), a hybrid variant of the Bluebonnet, the official state flower of Texas.
+
+## Credits
+
+Alamofire is owned and maintained by the [Alamofire Software Foundation](http://alamofire.org). You can follow them on Twitter at [@AlamofireSF](https://twitter.com/AlamofireSF) for project updates and releases.
+
+### Security Disclosure
+
+If you believe you have identified a security vulnerability with Alamofire, you should report it as soon as possible via email to security@alamofire.org. Please do not post it to a public issue tracker.
+
+## Donations
+
+The [ASF](https://github.com/Alamofire/Foundation#members) is looking to raise money to officially stay registered as a federal non-profit organization.
+Registering will allow Foundation members to gain some legal protections and also allow us to put donations to use, tax-free.
+Donating to the ASF will enable us to:
+
+- Pay our yearly legal fees to keep the non-profit in good status
+- Pay for our mail servers to help us stay on top of all questions and security issues
+- Potentially fund test servers to make it easier for us to test the edge cases
+- Potentially fund developers to work on one of our projects full-time
+
+The community adoption of the ASF libraries has been amazing.
+We are greatly humbled by your enthusiasm around the projects and want to continue to do everything we can to move the needle forward.
+With your continued support, the ASF will be able to improve its reach and also provide better legal safety for the core members.
+If you use any of our libraries for work, see if your employers would be interested in donating.
+Any amount you can donate today to help us reach our goal would be greatly appreciated.
+
+[![paypal](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=W34WPEE74APJQ)
+
+## License
+
+Alamofire is released under the MIT license. [See LICENSE](https://github.com/Alamofire/Alamofire/blob/master/LICENSE) for details.

Pods/Alamofire/Source/AFError.swift

@@ -0,0 +1,854 @@
+//
+//  AFError.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// `AFError` is the error type returned by Alamofire. It encompasses a few different types of errors, each with
+/// their own associated reasons.
+public enum AFError: Error {
+    /// The underlying reason the `.multipartEncodingFailed` error occurred.
+    public enum MultipartEncodingFailureReason {
+        /// The `fileURL` provided for reading an encodable body part isn't a file `URL`.
+        case bodyPartURLInvalid(url: URL)
+        /// The filename of the `fileURL` provided has either an empty `lastPathComponent` or `pathExtension.
+        case bodyPartFilenameInvalid(in: URL)
+        /// The file at the `fileURL` provided was not reachable.
+        case bodyPartFileNotReachable(at: URL)
+        /// Attempting to check the reachability of the `fileURL` provided threw an error.
+        case bodyPartFileNotReachableWithError(atURL: URL, error: Error)
+        /// The file at the `fileURL` provided is actually a directory.
+        case bodyPartFileIsDirectory(at: URL)
+        /// The size of the file at the `fileURL` provided was not returned by the system.
+        case bodyPartFileSizeNotAvailable(at: URL)
+        /// The attempt to find the size of the file at the `fileURL` provided threw an error.
+        case bodyPartFileSizeQueryFailedWithError(forURL: URL, error: Error)
+        /// An `InputStream` could not be created for the provided `fileURL`.
+        case bodyPartInputStreamCreationFailed(for: URL)
+        /// An `OutputStream` could not be created when attempting to write the encoded data to disk.
+        case outputStreamCreationFailed(for: URL)
+        /// The encoded body data could not be written to disk because a file already exists at the provided `fileURL`.
+        case outputStreamFileAlreadyExists(at: URL)
+        /// The `fileURL` provided for writing the encoded body data to disk is not a file `URL`.
+        case outputStreamURLInvalid(url: URL)
+        /// The attempt to write the encoded body data to disk failed with an underlying error.
+        case outputStreamWriteFailed(error: Error)
+        /// The attempt to read an encoded body part `InputStream` failed with underlying system error.
+        case inputStreamReadFailed(error: Error)
+    }
+
+    /// Represents unexpected input stream length that occur when encoding the `MultipartFormData`. Instances will be
+    /// embedded within an `AFError.multipartEncodingFailed` `.inputStreamReadFailed` case.
+    public struct UnexpectedInputStreamLength: Error {
+        /// The expected byte count to read.
+        public var bytesExpected: UInt64
+        /// The actual byte count read.
+        public var bytesRead: UInt64
+    }
+
+    /// The underlying reason the `.parameterEncodingFailed` error occurred.
+    public enum ParameterEncodingFailureReason {
+        /// The `URLRequest` did not have a `URL` to encode.
+        case missingURL
+        /// JSON serialization failed with an underlying system error during the encoding process.
+        case jsonEncodingFailed(error: Error)
+        /// Custom parameter encoding failed due to the associated `Error`.
+        case customEncodingFailed(error: Error)
+    }
+
+    /// The underlying reason the `.parameterEncoderFailed` error occurred.
+    public enum ParameterEncoderFailureReason {
+        /// Possible missing components.
+        public enum RequiredComponent {
+            /// The `URL` was missing or unable to be extracted from the passed `URLRequest` or during encoding.
+            case url
+            /// The `HTTPMethod` could not be extracted from the passed `URLRequest`.
+            case httpMethod(rawValue: String)
+        }
+
+        /// A `RequiredComponent` was missing during encoding.
+        case missingRequiredComponent(RequiredComponent)
+        /// The underlying encoder failed with the associated error.
+        case encoderFailed(error: Error)
+    }
+
+    /// The underlying reason the `.responseValidationFailed` error occurred.
+    public enum ResponseValidationFailureReason {
+        /// The data file containing the server response did not exist.
+        case dataFileNil
+        /// The data file containing the server response at the associated `URL` could not be read.
+        case dataFileReadFailed(at: URL)
+        /// The response did not contain a `Content-Type` and the `acceptableContentTypes` provided did not contain a
+        /// wildcard type.
+        case missingContentType(acceptableContentTypes: [String])
+        /// The response `Content-Type` did not match any type in the provided `acceptableContentTypes`.
+        case unacceptableContentType(acceptableContentTypes: [String], responseContentType: String)
+        /// The response status code was not acceptable.
+        case unacceptableStatusCode(code: Int)
+        /// Custom response validation failed due to the associated `Error`.
+        case customValidationFailed(error: Error)
+    }
+
+    /// The underlying reason the response serialization error occurred.
+    public enum ResponseSerializationFailureReason {
+        /// The server response contained no data or the data was zero length.
+        case inputDataNilOrZeroLength
+        /// The file containing the server response did not exist.
+        case inputFileNil
+        /// The file containing the server response could not be read from the associated `URL`.
+        case inputFileReadFailed(at: URL)
+        /// String serialization failed using the provided `String.Encoding`.
+        case stringSerializationFailed(encoding: String.Encoding)
+        /// JSON serialization failed with an underlying system error.
+        case jsonSerializationFailed(error: Error)
+        /// A `DataDecoder` failed to decode the response due to the associated `Error`.
+        case decodingFailed(error: Error)
+        /// A custom response serializer failed due to the associated `Error`.
+        case customSerializationFailed(error: Error)
+        /// Generic serialization failed for an empty response that wasn't type `Empty` but instead the associated type.
+        case invalidEmptyResponse(type: String)
+    }
+
+    /// Underlying reason a server trust evaluation error occurred.
+    public enum ServerTrustFailureReason {
+        /// The output of a server trust evaluation.
+        public struct Output {
+            /// The host for which the evaluation was performed.
+            public let host: String
+            /// The `SecTrust` value which was evaluated.
+            public let trust: SecTrust
+            /// The `OSStatus` of evaluation operation.
+            public let status: OSStatus
+            /// The result of the evaluation operation.
+            public let result: SecTrustResultType
+
+            /// Creates an `Output` value from the provided values.
+            init(_ host: String, _ trust: SecTrust, _ status: OSStatus, _ result: SecTrustResultType) {
+                self.host = host
+                self.trust = trust
+                self.status = status
+                self.result = result
+            }
+        }
+
+        /// No `ServerTrustEvaluator` was found for the associated host.
+        case noRequiredEvaluator(host: String)
+        /// No certificates were found with which to perform the trust evaluation.
+        case noCertificatesFound
+        /// No public keys were found with which to perform the trust evaluation.
+        case noPublicKeysFound
+        /// During evaluation, application of the associated `SecPolicy` failed.
+        case policyApplicationFailed(trust: SecTrust, policy: SecPolicy, status: OSStatus)
+        /// During evaluation, setting the associated anchor certificates failed.
+        case settingAnchorCertificatesFailed(status: OSStatus, certificates: [SecCertificate])
+        /// During evaluation, creation of the revocation policy failed.
+        case revocationPolicyCreationFailed
+        /// `SecTrust` evaluation failed with the associated `Error`, if one was produced.
+        case trustEvaluationFailed(error: Error?)
+        /// Default evaluation failed with the associated `Output`.
+        case defaultEvaluationFailed(output: Output)
+        /// Host validation failed with the associated `Output`.
+        case hostValidationFailed(output: Output)
+        /// Revocation check failed with the associated `Output` and options.
+        case revocationCheckFailed(output: Output, options: RevocationTrustEvaluator.Options)
+        /// Certificate pinning failed.
+        case certificatePinningFailed(host: String, trust: SecTrust, pinnedCertificates: [SecCertificate], serverCertificates: [SecCertificate])
+        /// Public key pinning failed.
+        case publicKeyPinningFailed(host: String, trust: SecTrust, pinnedKeys: [SecKey], serverKeys: [SecKey])
+        /// Custom server trust evaluation failed due to the associated `Error`.
+        case customEvaluationFailed(error: Error)
+    }
+
+    /// The underlying reason the `.urlRequestValidationFailed`
+    public enum URLRequestValidationFailureReason {
+        /// URLRequest with GET method had body data.
+        case bodyDataInGETRequest(Data)
+    }
+
+    ///  `UploadableConvertible` threw an error in `createUploadable()`.
+    case createUploadableFailed(error: Error)
+    ///  `URLRequestConvertible` threw an error in `asURLRequest()`.
+    case createURLRequestFailed(error: Error)
+    /// `SessionDelegate` threw an error while attempting to move downloaded file to destination URL.
+    case downloadedFileMoveFailed(error: Error, source: URL, destination: URL)
+    /// `Request` was explicitly cancelled.
+    case explicitlyCancelled
+    /// `URLConvertible` type failed to create a valid `URL`.
+    case invalidURL(url: URLConvertible)
+    /// Multipart form encoding failed.
+    case multipartEncodingFailed(reason: MultipartEncodingFailureReason)
+    /// `ParameterEncoding` threw an error during the encoding process.
+    case parameterEncodingFailed(reason: ParameterEncodingFailureReason)
+    /// `ParameterEncoder` threw an error while running the encoder.
+    case parameterEncoderFailed(reason: ParameterEncoderFailureReason)
+    /// `RequestAdapter` threw an error during adaptation.
+    case requestAdaptationFailed(error: Error)
+    /// `RequestRetrier` threw an error during the request retry process.
+    case requestRetryFailed(retryError: Error, originalError: Error)
+    /// Response validation failed.
+    case responseValidationFailed(reason: ResponseValidationFailureReason)
+    /// Response serialization failed.
+    case responseSerializationFailed(reason: ResponseSerializationFailureReason)
+    /// `ServerTrustEvaluating` instance threw an error during trust evaluation.
+    case serverTrustEvaluationFailed(reason: ServerTrustFailureReason)
+    /// `Session` which issued the `Request` was deinitialized, most likely because its reference went out of scope.
+    case sessionDeinitialized
+    /// `Session` was explicitly invalidated, possibly with the `Error` produced by the underlying `URLSession`.
+    case sessionInvalidated(error: Error?)
+    /// `URLSessionTask` completed with error.
+    case sessionTaskFailed(error: Error)
+    /// `URLRequest` failed validation.
+    case urlRequestValidationFailed(reason: URLRequestValidationFailureReason)
+}
+
+extension Error {
+    /// Returns the instance cast as an `AFError`.
+    public var asAFError: AFError? {
+        self as? AFError
+    }
+
+    /// Returns the instance cast as an `AFError`. If casting fails, a `fatalError` with the specified `message` is thrown.
+    public func asAFError(orFailWith message: @autoclosure () -> String, file: StaticString = #file, line: UInt = #line) -> AFError {
+        guard let afError = self as? AFError else {
+            fatalError(message(), file: file, line: line)
+        }
+        return afError
+    }
+
+    /// Casts the instance as `AFError` or returns `defaultAFError`
+    func asAFError(or defaultAFError: @autoclosure () -> AFError) -> AFError {
+        self as? AFError ?? defaultAFError()
+    }
+}
+
+// MARK: - Error Booleans
+
+extension AFError {
+    /// Returns whether the instance is `.sessionDeinitialized`.
+    public var isSessionDeinitializedError: Bool {
+        if case .sessionDeinitialized = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.sessionInvalidated`.
+    public var isSessionInvalidatedError: Bool {
+        if case .sessionInvalidated = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.explicitlyCancelled`.
+    public var isExplicitlyCancelledError: Bool {
+        if case .explicitlyCancelled = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.invalidURL`.
+    public var isInvalidURLError: Bool {
+        if case .invalidURL = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.parameterEncodingFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isParameterEncodingError: Bool {
+        if case .parameterEncodingFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.parameterEncoderFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isParameterEncoderError: Bool {
+        if case .parameterEncoderFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.multipartEncodingFailed`. When `true`, the `url` and `underlyingError`
+    /// properties will contain the associated values.
+    public var isMultipartEncodingError: Bool {
+        if case .multipartEncodingFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.requestAdaptationFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isRequestAdaptationError: Bool {
+        if case .requestAdaptationFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.responseValidationFailed`. When `true`, the `acceptableContentTypes`,
+    /// `responseContentType`,  `responseCode`, and `underlyingError` properties will contain the associated values.
+    public var isResponseValidationError: Bool {
+        if case .responseValidationFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.responseSerializationFailed`. When `true`, the `failedStringEncoding` and
+    /// `underlyingError` properties will contain the associated values.
+    public var isResponseSerializationError: Bool {
+        if case .responseSerializationFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `.serverTrustEvaluationFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isServerTrustEvaluationError: Bool {
+        if case .serverTrustEvaluationFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `requestRetryFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isRequestRetryError: Bool {
+        if case .requestRetryFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `createUploadableFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isCreateUploadableError: Bool {
+        if case .createUploadableFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `createURLRequestFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isCreateURLRequestError: Bool {
+        if case .createURLRequestFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `downloadedFileMoveFailed`. When `true`, the `destination` and `underlyingError` properties will
+    /// contain the associated values.
+    public var isDownloadedFileMoveError: Bool {
+        if case .downloadedFileMoveFailed = self { return true }
+        return false
+    }
+
+    /// Returns whether the instance is `createURLRequestFailed`. When `true`, the `underlyingError` property will
+    /// contain the associated value.
+    public var isSessionTaskError: Bool {
+        if case .sessionTaskFailed = self { return true }
+        return false
+    }
+}
+
+// MARK: - Convenience Properties
+
+extension AFError {
+    /// The `URLConvertible` associated with the error.
+    public var urlConvertible: URLConvertible? {
+        guard case let .invalidURL(url) = self else { return nil }
+        return url
+    }
+
+    /// The `URL` associated with the error.
+    public var url: URL? {
+        guard case let .multipartEncodingFailed(reason) = self else { return nil }
+        return reason.url
+    }
+
+    /// The underlying `Error` responsible for generating the failure associated with `.sessionInvalidated`,
+    /// `.parameterEncodingFailed`, `.parameterEncoderFailed`, `.multipartEncodingFailed`, `.requestAdaptationFailed`,
+    /// `.responseSerializationFailed`, `.requestRetryFailed` errors.
+    public var underlyingError: Error? {
+        switch self {
+        case let .multipartEncodingFailed(reason):
+            return reason.underlyingError
+        case let .parameterEncodingFailed(reason):
+            return reason.underlyingError
+        case let .parameterEncoderFailed(reason):
+            return reason.underlyingError
+        case let .requestAdaptationFailed(error):
+            return error
+        case let .requestRetryFailed(retryError, _):
+            return retryError
+        case let .responseValidationFailed(reason):
+            return reason.underlyingError
+        case let .responseSerializationFailed(reason):
+            return reason.underlyingError
+        case let .serverTrustEvaluationFailed(reason):
+            return reason.underlyingError
+        case let .sessionInvalidated(error):
+            return error
+        case let .createUploadableFailed(error):
+            return error
+        case let .createURLRequestFailed(error):
+            return error
+        case let .downloadedFileMoveFailed(error, _, _):
+            return error
+        case let .sessionTaskFailed(error):
+            return error
+        case .explicitlyCancelled,
+             .invalidURL,
+             .sessionDeinitialized,
+             .urlRequestValidationFailed:
+            return nil
+        }
+    }
+
+    /// The acceptable `Content-Type`s of a `.responseValidationFailed` error.
+    public var acceptableContentTypes: [String]? {
+        guard case let .responseValidationFailed(reason) = self else { return nil }
+        return reason.acceptableContentTypes
+    }
+
+    /// The response `Content-Type` of a `.responseValidationFailed` error.
+    public var responseContentType: String? {
+        guard case let .responseValidationFailed(reason) = self else { return nil }
+        return reason.responseContentType
+    }
+
+    /// The response code of a `.responseValidationFailed` error.
+    public var responseCode: Int? {
+        guard case let .responseValidationFailed(reason) = self else { return nil }
+        return reason.responseCode
+    }
+
+    /// The `String.Encoding` associated with a failed `.stringResponse()` call.
+    public var failedStringEncoding: String.Encoding? {
+        guard case let .responseSerializationFailed(reason) = self else { return nil }
+        return reason.failedStringEncoding
+    }
+
+    /// The `source` URL of a `.downloadedFileMoveFailed` error.
+    public var sourceURL: URL? {
+        guard case let .downloadedFileMoveFailed(_, source, _) = self else { return nil }
+        return source
+    }
+
+    /// The `destination` URL of a `.downloadedFileMoveFailed` error.
+    public var destinationURL: URL? {
+        guard case let .downloadedFileMoveFailed(_, _, destination) = self else { return nil }
+        return destination
+    }
+
+    /// The download resume data of any underlying network error. Only produced by `DownloadRequest`s.
+    public var downloadResumeData: Data? {
+        (underlyingError as? URLError)?.userInfo[NSURLSessionDownloadTaskResumeData] as? Data
+    }
+}
+
+extension AFError.ParameterEncodingFailureReason {
+    var underlyingError: Error? {
+        switch self {
+        case let .jsonEncodingFailed(error),
+             let .customEncodingFailed(error):
+            return error
+        case .missingURL:
+            return nil
+        }
+    }
+}
+
+extension AFError.ParameterEncoderFailureReason {
+    var underlyingError: Error? {
+        switch self {
+        case let .encoderFailed(error):
+            return error
+        case .missingRequiredComponent:
+            return nil
+        }
+    }
+}
+
+extension AFError.MultipartEncodingFailureReason {
+    var url: URL? {
+        switch self {
+        case let .bodyPartURLInvalid(url),
+             let .bodyPartFilenameInvalid(url),
+             let .bodyPartFileNotReachable(url),
+             let .bodyPartFileIsDirectory(url),
+             let .bodyPartFileSizeNotAvailable(url),
+             let .bodyPartInputStreamCreationFailed(url),
+             let .outputStreamCreationFailed(url),
+             let .outputStreamFileAlreadyExists(url),
+             let .outputStreamURLInvalid(url),
+             let .bodyPartFileNotReachableWithError(url, _),
+             let .bodyPartFileSizeQueryFailedWithError(url, _):
+            return url
+        case .outputStreamWriteFailed,
+             .inputStreamReadFailed:
+            return nil
+        }
+    }
+
+    var underlyingError: Error? {
+        switch self {
+        case let .bodyPartFileNotReachableWithError(_, error),
+             let .bodyPartFileSizeQueryFailedWithError(_, error),
+             let .outputStreamWriteFailed(error),
+             let .inputStreamReadFailed(error):
+            return error
+        case .bodyPartURLInvalid,
+             .bodyPartFilenameInvalid,
+             .bodyPartFileNotReachable,
+             .bodyPartFileIsDirectory,
+             .bodyPartFileSizeNotAvailable,
+             .bodyPartInputStreamCreationFailed,
+             .outputStreamCreationFailed,
+             .outputStreamFileAlreadyExists,
+             .outputStreamURLInvalid:
+            return nil
+        }
+    }
+}
+
+extension AFError.ResponseValidationFailureReason {
+    var acceptableContentTypes: [String]? {
+        switch self {
+        case let .missingContentType(types),
+             let .unacceptableContentType(types, _):
+            return types
+        case .dataFileNil,
+             .dataFileReadFailed,
+             .unacceptableStatusCode,
+             .customValidationFailed:
+            return nil
+        }
+    }
+
+    var responseContentType: String? {
+        switch self {
+        case let .unacceptableContentType(_, responseType):
+            return responseType
+        case .dataFileNil,
+             .dataFileReadFailed,
+             .missingContentType,
+             .unacceptableStatusCode,
+             .customValidationFailed:
+            return nil
+        }
+    }
+
+    var responseCode: Int? {
+        switch self {
+        case let .unacceptableStatusCode(code):
+            return code
+        case .dataFileNil,
+             .dataFileReadFailed,
+             .missingContentType,
+             .unacceptableContentType,
+             .customValidationFailed:
+            return nil
+        }
+    }
+
+    var underlyingError: Error? {
+        switch self {
+        case let .customValidationFailed(error):
+            return error
+        case .dataFileNil,
+             .dataFileReadFailed,
+             .missingContentType,
+             .unacceptableContentType,
+             .unacceptableStatusCode:
+            return nil
+        }
+    }
+}
+
+extension AFError.ResponseSerializationFailureReason {
+    var failedStringEncoding: String.Encoding? {
+        switch self {
+        case let .stringSerializationFailed(encoding):
+            return encoding
+        case .inputDataNilOrZeroLength,
+             .inputFileNil,
+             .inputFileReadFailed(_),
+             .jsonSerializationFailed(_),
+             .decodingFailed(_),
+             .customSerializationFailed(_),
+             .invalidEmptyResponse:
+            return nil
+        }
+    }
+
+    var underlyingError: Error? {
+        switch self {
+        case let .jsonSerializationFailed(error),
+             let .decodingFailed(error),
+             let .customSerializationFailed(error):
+            return error
+        case .inputDataNilOrZeroLength,
+             .inputFileNil,
+             .inputFileReadFailed,
+             .stringSerializationFailed,
+             .invalidEmptyResponse:
+            return nil
+        }
+    }
+}
+
+extension AFError.ServerTrustFailureReason {
+    var output: AFError.ServerTrustFailureReason.Output? {
+        switch self {
+        case let .defaultEvaluationFailed(output),
+             let .hostValidationFailed(output),
+             let .revocationCheckFailed(output, _):
+            return output
+        case .noRequiredEvaluator,
+             .noCertificatesFound,
+             .noPublicKeysFound,
+             .policyApplicationFailed,
+             .settingAnchorCertificatesFailed,
+             .revocationPolicyCreationFailed,
+             .trustEvaluationFailed,
+             .certificatePinningFailed,
+             .publicKeyPinningFailed,
+             .customEvaluationFailed:
+            return nil
+        }
+    }
+
+    var underlyingError: Error? {
+        switch self {
+        case let .customEvaluationFailed(error):
+            return error
+        case let .trustEvaluationFailed(error):
+            return error
+        case .noRequiredEvaluator,
+             .noCertificatesFound,
+             .noPublicKeysFound,
+             .policyApplicationFailed,
+             .settingAnchorCertificatesFailed,
+             .revocationPolicyCreationFailed,
+             .defaultEvaluationFailed,
+             .hostValidationFailed,
+             .revocationCheckFailed,
+             .certificatePinningFailed,
+             .publicKeyPinningFailed:
+            return nil
+        }
+    }
+}
+
+// MARK: - Error Descriptions
+
+extension AFError: LocalizedError {
+    public var errorDescription: String? {
+        switch self {
+        case .explicitlyCancelled:
+            return "Request explicitly cancelled."
+        case let .invalidURL(url):
+            return "URL is not valid: \(url)"
+        case let .parameterEncodingFailed(reason):
+            return reason.localizedDescription
+        case let .parameterEncoderFailed(reason):
+            return reason.localizedDescription
+        case let .multipartEncodingFailed(reason):
+            return reason.localizedDescription
+        case let .requestAdaptationFailed(error):
+            return "Request adaption failed with error: \(error.localizedDescription)"
+        case let .responseValidationFailed(reason):
+            return reason.localizedDescription
+        case let .responseSerializationFailed(reason):
+            return reason.localizedDescription
+        case let .requestRetryFailed(retryError, originalError):
+            return """
+            Request retry failed with retry error: \(retryError.localizedDescription), \
+            original error: \(originalError.localizedDescription)
+            """
+        case .sessionDeinitialized:
+            return """
+            Session was invalidated without error, so it was likely deinitialized unexpectedly. \
+            Be sure to retain a reference to your Session for the duration of your requests.
+            """
+        case let .sessionInvalidated(error):
+            return "Session was invalidated with error: \(error?.localizedDescription ?? "No description.")"
+        case let .serverTrustEvaluationFailed(reason):
+            return "Server trust evaluation failed due to reason: \(reason.localizedDescription)"
+        case let .urlRequestValidationFailed(reason):
+            return "URLRequest validation failed due to reason: \(reason.localizedDescription)"
+        case let .createUploadableFailed(error):
+            return "Uploadable creation failed with error: \(error.localizedDescription)"
+        case let .createURLRequestFailed(error):
+            return "URLRequest creation failed with error: \(error.localizedDescription)"
+        case let .downloadedFileMoveFailed(error, source, destination):
+            return "Moving downloaded file from: \(source) to: \(destination) failed with error: \(error.localizedDescription)"
+        case let .sessionTaskFailed(error):
+            return "URLSessionTask failed with error: \(error.localizedDescription)"
+        }
+    }
+}
+
+extension AFError.ParameterEncodingFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case .missingURL:
+            return "URL request to encode was missing a URL"
+        case let .jsonEncodingFailed(error):
+            return "JSON could not be encoded because of error:\n\(error.localizedDescription)"
+        case let .customEncodingFailed(error):
+            return "Custom parameter encoder failed with error: \(error.localizedDescription)"
+        }
+    }
+}
+
+extension AFError.ParameterEncoderFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case let .missingRequiredComponent(component):
+            return "Encoding failed due to a missing request component: \(component)"
+        case let .encoderFailed(error):
+            return "The underlying encoder failed with the error: \(error)"
+        }
+    }
+}
+
+extension AFError.MultipartEncodingFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case let .bodyPartURLInvalid(url):
+            return "The URL provided is not a file URL: \(url)"
+        case let .bodyPartFilenameInvalid(url):
+            return "The URL provided does not have a valid filename: \(url)"
+        case let .bodyPartFileNotReachable(url):
+            return "The URL provided is not reachable: \(url)"
+        case let .bodyPartFileNotReachableWithError(url, error):
+            return """
+            The system returned an error while checking the provided URL for reachability.
+            URL: \(url)
+            Error: \(error)
+            """
+        case let .bodyPartFileIsDirectory(url):
+            return "The URL provided is a directory: \(url)"
+        case let .bodyPartFileSizeNotAvailable(url):
+            return "Could not fetch the file size from the provided URL: \(url)"
+        case let .bodyPartFileSizeQueryFailedWithError(url, error):
+            return """
+            The system returned an error while attempting to fetch the file size from the provided URL.
+            URL: \(url)
+            Error: \(error)
+            """
+        case let .bodyPartInputStreamCreationFailed(url):
+            return "Failed to create an InputStream for the provided URL: \(url)"
+        case let .outputStreamCreationFailed(url):
+            return "Failed to create an OutputStream for URL: \(url)"
+        case let .outputStreamFileAlreadyExists(url):
+            return "A file already exists at the provided URL: \(url)"
+        case let .outputStreamURLInvalid(url):
+            return "The provided OutputStream URL is invalid: \(url)"
+        case let .outputStreamWriteFailed(error):
+            return "OutputStream write failed with error: \(error)"
+        case let .inputStreamReadFailed(error):
+            return "InputStream read failed with error: \(error)"
+        }
+    }
+}
+
+extension AFError.ResponseSerializationFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case .inputDataNilOrZeroLength:
+            return "Response could not be serialized, input data was nil or zero length."
+        case .inputFileNil:
+            return "Response could not be serialized, input file was nil."
+        case let .inputFileReadFailed(url):
+            return "Response could not be serialized, input file could not be read: \(url)."
+        case let .stringSerializationFailed(encoding):
+            return "String could not be serialized with encoding: \(encoding)."
+        case let .jsonSerializationFailed(error):
+            return "JSON could not be serialized because of error:\n\(error.localizedDescription)"
+        case let .invalidEmptyResponse(type):
+            return """
+            Empty response could not be serialized to type: \(type). \
+            Use Empty as the expected type for such responses.
+            """
+        case let .decodingFailed(error):
+            return "Response could not be decoded because of error:\n\(error.localizedDescription)"
+        case let .customSerializationFailed(error):
+            return "Custom response serializer failed with error:\n\(error.localizedDescription)"
+        }
+    }
+}
+
+extension AFError.ResponseValidationFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case .dataFileNil:
+            return "Response could not be validated, data file was nil."
+        case let .dataFileReadFailed(url):
+            return "Response could not be validated, data file could not be read: \(url)."
+        case let .missingContentType(types):
+            return """
+            Response Content-Type was missing and acceptable content types \
+            (\(types.joined(separator: ","))) do not match "*/*".
+            """
+        case let .unacceptableContentType(acceptableTypes, responseType):
+            return """
+            Response Content-Type "\(responseType)" does not match any acceptable types: \
+            \(acceptableTypes.joined(separator: ",")).
+            """
+        case let .unacceptableStatusCode(code):
+            return "Response status code was unacceptable: \(code)."
+        case let .customValidationFailed(error):
+            return "Custom response validation failed with error: \(error.localizedDescription)"
+        }
+    }
+}
+
+extension AFError.ServerTrustFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case let .noRequiredEvaluator(host):
+            return "A ServerTrustEvaluating value is required for host \(host) but none was found."
+        case .noCertificatesFound:
+            return "No certificates were found or provided for evaluation."
+        case .noPublicKeysFound:
+            return "No public keys were found or provided for evaluation."
+        case .policyApplicationFailed:
+            return "Attempting to set a SecPolicy failed."
+        case .settingAnchorCertificatesFailed:
+            return "Attempting to set the provided certificates as anchor certificates failed."
+        case .revocationPolicyCreationFailed:
+            return "Attempting to create a revocation policy failed."
+        case let .trustEvaluationFailed(error):
+            return "SecTrust evaluation failed with error: \(error?.localizedDescription ?? "None")"
+        case let .defaultEvaluationFailed(output):
+            return "Default evaluation failed for host \(output.host)."
+        case let .hostValidationFailed(output):
+            return "Host validation failed for host \(output.host)."
+        case let .revocationCheckFailed(output, _):
+            return "Revocation check failed for host \(output.host)."
+        case let .certificatePinningFailed(host, _, _, _):
+            return "Certificate pinning failed for host \(host)."
+        case let .publicKeyPinningFailed(host, _, _, _):
+            return "Public key pinning failed for host \(host)."
+        case let .customEvaluationFailed(error):
+            return "Custom trust evaluation failed with error: \(error.localizedDescription)"
+        }
+    }
+}
+
+extension AFError.URLRequestValidationFailureReason {
+    var localizedDescription: String {
+        switch self {
+        case let .bodyDataInGETRequest(data):
+            return """
+            Invalid URLRequest: Requests with GET method cannot have body data:
+            \(String(decoding: data, as: UTF8.self))
+            """
+        }
+    }
+}

Pods/Alamofire/Source/Alamofire.swift

@@ -0,0 +1,29 @@
+//
+//  Alamofire.swift
+//
+//  Copyright (c) 2014-2021 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+/// Reference to `Session.default` for quick bootstrapping and examples.
+public let AF = Session.default
+
+/// Current Alamofire version. Necessary since SPM doesn't use dynamic libraries. Plus this will be more accurate.
+let version = "5.4.3"

Pods/Alamofire/Source/AlamofireExtended.swift

@@ -0,0 +1,61 @@
+//
+//  AlamofireExtended.swift
+//
+//  Copyright (c) 2019 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+/// Type that acts as a generic extension point for all `AlamofireExtended` types.
+public struct AlamofireExtension<ExtendedType> {
+    /// Stores the type or meta-type of any extended type.
+    public private(set) var type: ExtendedType
+
+    /// Create an instance from the provided value.
+    ///
+    /// - Parameter type: Instance being extended.
+    public init(_ type: ExtendedType) {
+        self.type = type
+    }
+}
+
+/// Protocol describing the `af` extension points for Alamofire extended types.
+public protocol AlamofireExtended {
+    /// Type being extended.
+    associatedtype ExtendedType
+
+    /// Static Alamofire extension point.
+    static var af: AlamofireExtension<ExtendedType>.Type { get set }
+    /// Instance Alamofire extension point.
+    var af: AlamofireExtension<ExtendedType> { get set }
+}
+
+extension AlamofireExtended {
+    /// Static Alamofire extension point.
+    public static var af: AlamofireExtension<Self>.Type {
+        get { AlamofireExtension<Self>.self }
+        set {}
+    }
+
+    /// Instance Alamofire extension point.
+    public var af: AlamofireExtension<Self> {
+        get { AlamofireExtension(self) }
+        set {}
+    }
+}

Pods/Alamofire/Source/AuthenticationInterceptor.swift

@@ -0,0 +1,404 @@
+//
+//  AuthenticationInterceptor.swift
+//
+//  Copyright (c) 2020 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Types adopting the `AuthenticationCredential` protocol can be used to authenticate `URLRequest`s.
+///
+/// One common example of an `AuthenticationCredential` is an OAuth2 credential containing an access token used to
+/// authenticate all requests on behalf of a user. The access token generally has an expiration window of 60 minutes
+/// which will then require a refresh of the credential using the refresh token to generate a new access token.
+public protocol AuthenticationCredential {
+    /// Whether the credential requires a refresh. This property should always return `true` when the credential is
+    /// expired. It is also wise to consider returning `true` when the credential will expire in several seconds or
+    /// minutes depending on the expiration window of the credential.
+    ///
+    /// For example, if the credential is valid for 60 minutes, then it would be wise to return `true` when the
+    /// credential is only valid for 5 minutes or less. That ensures the credential will not expire as it is passed
+    /// around backend services.
+    var requiresRefresh: Bool { get }
+}
+
+// MARK: -
+
+/// Types adopting the `Authenticator` protocol can be used to authenticate `URLRequest`s with an
+/// `AuthenticationCredential` as well as refresh the `AuthenticationCredential` when required.
+public protocol Authenticator: AnyObject {
+    /// The type of credential associated with the `Authenticator` instance.
+    associatedtype Credential: AuthenticationCredential
+
+    /// Applies the `Credential` to the `URLRequest`.
+    ///
+    /// In the case of OAuth2, the access token of the `Credential` would be added to the `URLRequest` as a Bearer
+    /// token to the `Authorization` header.
+    ///
+    /// - Parameters:
+    ///   - credential: The `Credential`.
+    ///   - urlRequest: The `URLRequest`.
+    func apply(_ credential: Credential, to urlRequest: inout URLRequest)
+
+    /// Refreshes the `Credential` and executes the `completion` closure with the `Result` once complete.
+    ///
+    /// Refresh can be called in one of two ways. It can be called before the `Request` is actually executed due to
+    /// a `requiresRefresh` returning `true` during the adapt portion of the `Request` creation process. It can also
+    /// be triggered by a failed `Request` where the authentication server denied access due to an expired or
+    /// invalidated access token.
+    ///
+    /// In the case of OAuth2, this method would use the refresh token of the `Credential` to generate a new
+    /// `Credential` using the authentication service. Once complete, the `completion` closure should be called with
+    /// the new `Credential`, or the error that occurred.
+    ///
+    /// In general, if the refresh call fails with certain status codes from the authentication server (commonly a 401),
+    /// the refresh token in the `Credential` can no longer be used to generate a valid `Credential`. In these cases,
+    /// you will need to reauthenticate the user with their username / password.
+    ///
+    /// Please note, these are just general examples of common use cases. They are not meant to solve your specific
+    /// authentication server challenges. Please work with your authentication server team to ensure your
+    /// `Authenticator` logic matches their expectations.
+    ///
+    /// - Parameters:
+    ///   - credential: The `Credential` to refresh.
+    ///   - session:    The `Session` requiring the refresh.
+    ///   - completion: The closure to be executed once the refresh is complete.
+    func refresh(_ credential: Credential, for session: Session, completion: @escaping (Result<Credential, Error>) -> Void)
+
+    /// Determines whether the `URLRequest` failed due to an authentication error based on the `HTTPURLResponse`.
+    ///
+    /// If the authentication server **CANNOT** invalidate credentials after they are issued, then simply return `false`
+    /// for this method. If the authentication server **CAN** invalidate credentials due to security breaches, then you
+    /// will need to work with your authentication server team to understand how to identify when this occurs.
+    ///
+    /// In the case of OAuth2, where an authentication server can invalidate credentials, you will need to inspect the
+    /// `HTTPURLResponse` or possibly the `Error` for when this occurs. This is commonly handled by the authentication
+    /// server returning a 401 status code and some additional header to indicate an OAuth2 failure occurred.
+    ///
+    /// It is very important to understand how your authentication server works to be able to implement this correctly.
+    /// For example, if your authentication server returns a 401 when an OAuth2 error occurs, and your downstream
+    /// service also returns a 401 when you are not authorized to perform that operation, how do you know which layer
+    /// of the backend returned you a 401? You do not want to trigger a refresh unless you know your authentication
+    /// server is actually the layer rejecting the request. Again, work with your authentication server team to understand
+    /// how to identify an OAuth2 401 error vs. a downstream 401 error to avoid endless refresh loops.
+    ///
+    /// - Parameters:
+    ///   - urlRequest: The `URLRequest`.
+    ///   - response:   The `HTTPURLResponse`.
+    ///   - error:      The `Error`.
+    ///
+    /// - Returns: `true` if the `URLRequest` failed due to an authentication error, `false` otherwise.
+    func didRequest(_ urlRequest: URLRequest, with response: HTTPURLResponse, failDueToAuthenticationError error: Error) -> Bool
+
+    /// Determines whether the `URLRequest` is authenticated with the `Credential`.
+    ///
+    /// If the authentication server **CANNOT** invalidate credentials after they are issued, then simply return `true`
+    /// for this method. If the authentication server **CAN** invalidate credentials due to security breaches, then
+    /// read on.
+    ///
+    /// When an authentication server can invalidate credentials, it means that you may have a non-expired credential
+    /// that appears to be valid, but will be rejected by the authentication server when used. Generally when this
+    /// happens, a number of requests are all sent when the application is foregrounded, and all of them will be
+    /// rejected by the authentication server in the order they are received. The first failed request will trigger a
+    /// refresh internally, which will update the credential, and then retry all the queued requests with the new
+    /// credential. However, it is possible that some of the original requests will not return from the authentication
+    /// server until the refresh has completed. This is where this method comes in.
+    ///
+    /// When the authentication server rejects a credential, we need to check to make sure we haven't refreshed the
+    /// credential while the request was in flight. If it has already refreshed, then we don't need to trigger an
+    /// additional refresh. If it hasn't refreshed, then we need to refresh.
+    ///
+    /// Now that it is understood how the result of this method is used in the refresh lifecyle, let's walk through how
+    /// to implement it. You should return `true` in this method if the `URLRequest` is authenticated in a way that
+    /// matches the values in the `Credential`. In the case of OAuth2, this would mean that the Bearer token in the
+    /// `Authorization` header of the `URLRequest` matches the access token in the `Credential`. If it matches, then we
+    /// know the `Credential` was used to authenticate the `URLRequest` and should return `true`. If the Bearer token
+    /// did not match the access token, then you should return `false`.
+    ///
+    /// - Parameters:
+    ///   - urlRequest: The `URLRequest`.
+    ///   - credential: The `Credential`.
+    ///
+    /// - Returns: `true` if the `URLRequest` is authenticated with the `Credential`, `false` otherwise.
+    func isRequest(_ urlRequest: URLRequest, authenticatedWith credential: Credential) -> Bool
+}
+
+// MARK: -
+
+/// Represents various authentication failures that occur when using the `AuthenticationInterceptor`. All errors are
+/// still vended from Alamofire as `AFError` types. The `AuthenticationError` instances will be embedded within
+/// `AFError` `.requestAdaptationFailed` or `.requestRetryFailed` cases.
+public enum AuthenticationError: Error {
+    /// The credential was missing so the request could not be authenticated.
+    case missingCredential
+    /// The credential was refreshed too many times within the `RefreshWindow`.
+    case excessiveRefresh
+}
+
+// MARK: -
+
+/// The `AuthenticationInterceptor` class manages the queuing and threading complexity of authenticating requests.
+/// It relies on an `Authenticator` type to handle the actual `URLRequest` authentication and `Credential` refresh.
+public class AuthenticationInterceptor<AuthenticatorType>: RequestInterceptor where AuthenticatorType: Authenticator {
+    // MARK: Typealiases
+
+    /// Type of credential used to authenticate requests.
+    public typealias Credential = AuthenticatorType.Credential
+
+    // MARK: Helper Types
+
+    /// Type that defines a time window used to identify excessive refresh calls. When enabled, prior to executing a
+    /// refresh, the `AuthenticationInterceptor` compares the timestamp history of previous refresh calls against the
+    /// `RefreshWindow`. If more refreshes have occurred within the refresh window than allowed, the refresh is
+    /// cancelled and an `AuthorizationError.excessiveRefresh` error is thrown.
+    public struct RefreshWindow {
+        /// `TimeInterval` defining the duration of the time window before the current time in which the number of
+        /// refresh attempts is compared against `maximumAttempts`. For example, if `interval` is 30 seconds, then the
+        /// `RefreshWindow` represents the past 30 seconds. If more attempts occurred in the past 30 seconds than
+        /// `maximumAttempts`, an `.excessiveRefresh` error will be thrown.
+        public let interval: TimeInterval
+
+        /// Total refresh attempts allowed within `interval` before throwing an `.excessiveRefresh` error.
+        public let maximumAttempts: Int
+
+        /// Creates a `RefreshWindow` instance from the specified `interval` and `maximumAttempts`.
+        ///
+        /// - Parameters:
+        ///   - interval:        `TimeInterval` defining the duration of the time window before the current time.
+        ///   - maximumAttempts: The maximum attempts allowed within the `TimeInterval`.
+        public init(interval: TimeInterval = 30.0, maximumAttempts: Int = 5) {
+            self.interval = interval
+            self.maximumAttempts = maximumAttempts
+        }
+    }
+
+    private struct AdaptOperation {
+        let urlRequest: URLRequest
+        let session: Session
+        let completion: (Result<URLRequest, Error>) -> Void
+    }
+
+    private enum AdaptResult {
+        case adapt(Credential)
+        case doNotAdapt(AuthenticationError)
+        case adaptDeferred
+    }
+
+    private struct MutableState {
+        var credential: Credential?
+
+        var isRefreshing = false
+        var refreshTimestamps: [TimeInterval] = []
+        var refreshWindow: RefreshWindow?
+
+        var adaptOperations: [AdaptOperation] = []
+        var requestsToRetry: [(RetryResult) -> Void] = []
+    }
+
+    // MARK: Properties
+
+    /// The `Credential` used to authenticate requests.
+    public var credential: Credential? {
+        get { mutableState.credential }
+        set { mutableState.credential = newValue }
+    }
+
+    let authenticator: AuthenticatorType
+    let queue = DispatchQueue(label: "org.alamofire.authentication.inspector")
+
+    @Protected
+    private var mutableState = MutableState()
+
+    // MARK: Initialization
+
+    /// Creates an `AuthenticationInterceptor` instance from the specified parameters.
+    ///
+    /// A `nil` `RefreshWindow` will result in the `AuthenticationInterceptor` not checking for excessive refresh calls.
+    /// It is recommended to always use a `RefreshWindow` to avoid endless refresh cycles.
+    ///
+    /// - Parameters:
+    ///   - authenticator: The `Authenticator` type.
+    ///   - credential:    The `Credential` if it exists. `nil` by default.
+    ///   - refreshWindow: The `RefreshWindow` used to identify excessive refresh calls. `RefreshWindow()` by default.
+    public init(authenticator: AuthenticatorType,
+                credential: Credential? = nil,
+                refreshWindow: RefreshWindow? = RefreshWindow()) {
+        self.authenticator = authenticator
+        mutableState.credential = credential
+        mutableState.refreshWindow = refreshWindow
+    }
+
+    // MARK: Adapt
+
+    public func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void) {
+        let adaptResult: AdaptResult = $mutableState.write { mutableState in
+            // Queue the adapt operation if a refresh is already in place.
+            guard !mutableState.isRefreshing else {
+                let operation = AdaptOperation(urlRequest: urlRequest, session: session, completion: completion)
+                mutableState.adaptOperations.append(operation)
+                return .adaptDeferred
+            }
+
+            // Throw missing credential error is the credential is missing.
+            guard let credential = mutableState.credential else {
+                let error = AuthenticationError.missingCredential
+                return .doNotAdapt(error)
+            }
+
+            // Queue the adapt operation and trigger refresh operation if credential requires refresh.
+            guard !credential.requiresRefresh else {
+                let operation = AdaptOperation(urlRequest: urlRequest, session: session, completion: completion)
+                mutableState.adaptOperations.append(operation)
+                refresh(credential, for: session, insideLock: &mutableState)
+                return .adaptDeferred
+            }
+
+            return .adapt(credential)
+        }
+
+        switch adaptResult {
+        case let .adapt(credential):
+            var authenticatedRequest = urlRequest
+            authenticator.apply(credential, to: &authenticatedRequest)
+            completion(.success(authenticatedRequest))
+
+        case let .doNotAdapt(adaptError):
+            completion(.failure(adaptError))
+
+        case .adaptDeferred:
+            // No-op: adapt operation captured during refresh.
+            break
+        }
+    }
+
+    // MARK: Retry
+
+    public func retry(_ request: Request, for session: Session, dueTo error: Error, completion: @escaping (RetryResult) -> Void) {
+        // Do not attempt retry if there was not an original request and response from the server.
+        guard let urlRequest = request.request, let response = request.response else {
+            completion(.doNotRetry)
+            return
+        }
+
+        // Do not attempt retry unless the `Authenticator` verifies failure was due to authentication error (i.e. 401 status code).
+        guard authenticator.didRequest(urlRequest, with: response, failDueToAuthenticationError: error) else {
+            completion(.doNotRetry)
+            return
+        }
+
+        // Do not attempt retry if there is no credential.
+        guard let credential = credential else {
+            let error = AuthenticationError.missingCredential
+            completion(.doNotRetryWithError(error))
+            return
+        }
+
+        // Retry the request if the `Authenticator` verifies it was authenticated with a previous credential.
+        guard authenticator.isRequest(urlRequest, authenticatedWith: credential) else {
+            completion(.retry)
+            return
+        }
+
+        $mutableState.write { mutableState in
+            mutableState.requestsToRetry.append(completion)
+
+            guard !mutableState.isRefreshing else { return }
+
+            refresh(credential, for: session, insideLock: &mutableState)
+        }
+    }
+
+    // MARK: Refresh
+
+    private func refresh(_ credential: Credential, for session: Session, insideLock mutableState: inout MutableState) {
+        guard !isRefreshExcessive(insideLock: &mutableState) else {
+            let error = AuthenticationError.excessiveRefresh
+            handleRefreshFailure(error, insideLock: &mutableState)
+            return
+        }
+
+        mutableState.refreshTimestamps.append(ProcessInfo.processInfo.systemUptime)
+        mutableState.isRefreshing = true
+
+        // Dispatch to queue to hop out of the lock in case authenticator.refresh is implemented synchronously.
+        queue.async {
+            self.authenticator.refresh(credential, for: session) { result in
+                self.$mutableState.write { mutableState in
+                    switch result {
+                    case let .success(credential):
+                        self.handleRefreshSuccess(credential, insideLock: &mutableState)
+                    case let .failure(error):
+                        self.handleRefreshFailure(error, insideLock: &mutableState)
+                    }
+                }
+            }
+        }
+    }
+
+    private func isRefreshExcessive(insideLock mutableState: inout MutableState) -> Bool {
+        guard let refreshWindow = mutableState.refreshWindow else { return false }
+
+        let refreshWindowMin = ProcessInfo.processInfo.systemUptime - refreshWindow.interval
+
+        let refreshAttemptsWithinWindow = mutableState.refreshTimestamps.reduce(into: 0) { attempts, refreshTimestamp in
+            guard refreshWindowMin <= refreshTimestamp else { return }
+            attempts += 1
+        }
+
+        let isRefreshExcessive = refreshAttemptsWithinWindow >= refreshWindow.maximumAttempts
+
+        return isRefreshExcessive
+    }
+
+    private func handleRefreshSuccess(_ credential: Credential, insideLock mutableState: inout MutableState) {
+        mutableState.credential = credential
+
+        let adaptOperations = mutableState.adaptOperations
+        let requestsToRetry = mutableState.requestsToRetry
+
+        mutableState.adaptOperations.removeAll()
+        mutableState.requestsToRetry.removeAll()
+
+        mutableState.isRefreshing = false
+
+        // Dispatch to queue to hop out of the mutable state lock
+        queue.async {
+            adaptOperations.forEach { self.adapt($0.urlRequest, for: $0.session, completion: $0.completion) }
+            requestsToRetry.forEach { $0(.retry) }
+        }
+    }
+
+    private func handleRefreshFailure(_ error: Error, insideLock mutableState: inout MutableState) {
+        let adaptOperations = mutableState.adaptOperations
+        let requestsToRetry = mutableState.requestsToRetry
+
+        mutableState.adaptOperations.removeAll()
+        mutableState.requestsToRetry.removeAll()
+
+        mutableState.isRefreshing = false
+
+        // Dispatch to queue to hop out of the mutable state lock
+        queue.async {
+            adaptOperations.forEach { $0.completion(.failure(error)) }
+            requestsToRetry.forEach { $0(.doNotRetryWithError(error)) }
+        }
+    }
+}

Pods/Alamofire/Source/CachedResponseHandler.swift

@@ -0,0 +1,91 @@
+//
+//  CachedResponseHandler.swift
+//
+//  Copyright (c) 2019 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A type that handles whether the data task should store the HTTP response in the cache.
+public protocol CachedResponseHandler {
+    /// Determines whether the HTTP response should be stored in the cache.
+    ///
+    /// The `completion` closure should be passed one of three possible options:
+    ///
+    ///   1. The cached response provided by the server (this is the most common use case).
+    ///   2. A modified version of the cached response (you may want to modify it in some way before caching).
+    ///   3. A `nil` value to prevent the cached response from being stored in the cache.
+    ///
+    /// - Parameters:
+    ///   - task:       The data task whose request resulted in the cached response.
+    ///   - response:   The cached response to potentially store in the cache.
+    ///   - completion: The closure to execute containing cached response, a modified response, or `nil`.
+    func dataTask(_ task: URLSessionDataTask,
+                  willCacheResponse response: CachedURLResponse,
+                  completion: @escaping (CachedURLResponse?) -> Void)
+}
+
+// MARK: -
+
+/// `ResponseCacher` is a convenience `CachedResponseHandler` making it easy to cache, not cache, or modify a cached
+/// response.
+public struct ResponseCacher {
+    /// Defines the behavior of the `ResponseCacher` type.
+    public enum Behavior {
+        /// Stores the cached response in the cache.
+        case cache
+        /// Prevents the cached response from being stored in the cache.
+        case doNotCache
+        /// Modifies the cached response before storing it in the cache.
+        case modify((URLSessionDataTask, CachedURLResponse) -> CachedURLResponse?)
+    }
+
+    /// Returns a `ResponseCacher` with a follow `Behavior`.
+    public static let cache = ResponseCacher(behavior: .cache)
+    /// Returns a `ResponseCacher` with a do not follow `Behavior`.
+    public static let doNotCache = ResponseCacher(behavior: .doNotCache)
+
+    /// The `Behavior` of the `ResponseCacher`.
+    public let behavior: Behavior
+
+    /// Creates a `ResponseCacher` instance from the `Behavior`.
+    ///
+    /// - Parameter behavior: The `Behavior`.
+    public init(behavior: Behavior) {
+        self.behavior = behavior
+    }
+}
+
+extension ResponseCacher: CachedResponseHandler {
+    public func dataTask(_ task: URLSessionDataTask,
+                         willCacheResponse response: CachedURLResponse,
+                         completion: @escaping (CachedURLResponse?) -> Void) {
+        switch behavior {
+        case .cache:
+            completion(response)
+        case .doNotCache:
+            completion(nil)
+        case let .modify(closure):
+            let response = closure(task, response)
+            completion(response)
+        }
+    }
+}

Pods/Alamofire/Source/Combine.swift

@@ -0,0 +1,622 @@
+//
+//  Combine.swift
+//
+//  Copyright (c) 2020 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#if canImport(Combine)
+
+import Combine
+import Dispatch
+import Foundation
+
+// MARK: - DataRequest / UploadRequest
+
+/// A Combine `Publisher` that publishes the `DataResponse<Value, AFError>` of the provided `DataRequest`.
+@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+public struct DataResponsePublisher<Value>: Publisher {
+    public typealias Output = DataResponse<Value, AFError>
+    public typealias Failure = Never
+
+    private typealias Handler = (@escaping (_ response: DataResponse<Value, AFError>) -> Void) -> DataRequest
+
+    private let request: DataRequest
+    private let responseHandler: Handler
+
+    /// Creates an instance which will serialize responses using the provided `ResponseSerializer`.
+    ///
+    /// - Parameters:
+    ///   - request:    `DataRequest` for which to publish the response.
+    ///   - queue:      `DispatchQueue` on which the `DataResponse` value will be published. `.main` by default.
+    ///   - serializer: `ResponseSerializer` used to produce the published `DataResponse`.
+    public init<Serializer: ResponseSerializer>(_ request: DataRequest, queue: DispatchQueue, serializer: Serializer)
+        where Value == Serializer.SerializedObject {
+        self.request = request
+        responseHandler = { request.response(queue: queue, responseSerializer: serializer, completionHandler: $0) }
+    }
+
+    /// Creates an instance which will serialize responses using the provided `DataResponseSerializerProtocol`.
+    ///
+    /// - Parameters:
+    ///   - request:    `DataRequest` for which to publish the response.
+    ///   - queue:      `DispatchQueue` on which the `DataResponse` value will be published. `.main` by default.
+    ///   - serializer: `DataResponseSerializerProtocol` used to produce the published `DataResponse`.
+    public init<Serializer: DataResponseSerializerProtocol>(_ request: DataRequest,
+                                                            queue: DispatchQueue,
+                                                            serializer: Serializer)
+        where Value == Serializer.SerializedObject {
+        self.request = request
+        responseHandler = { request.response(queue: queue, responseSerializer: serializer, completionHandler: $0) }
+    }
+
+    /// Publishes only the `Result` of the `DataResponse` value.
+    ///
+    /// - Returns: The `AnyPublisher` publishing the `Result<Value, AFError>` value.
+    public func result() -> AnyPublisher<Result<Value, AFError>, Never> {
+        map { $0.result }.eraseToAnyPublisher()
+    }
+
+    /// Publishes the `Result` of the `DataResponse` as a single `Value` or fail with the `AFError` instance.
+    ///
+    /// - Returns: The `AnyPublisher<Value, AFError>` publishing the stream.
+    public func value() -> AnyPublisher<Value, AFError> {
+        setFailureType(to: AFError.self).flatMap { $0.result.publisher }.eraseToAnyPublisher()
+    }
+
+    public func receive<S>(subscriber: S) where S: Subscriber, DataResponsePublisher.Failure == S.Failure, DataResponsePublisher.Output == S.Input {
+        subscriber.receive(subscription: Inner(request: request,
+                                               responseHandler: responseHandler,
+                                               downstream: subscriber))
+    }
+
+    private final class Inner<Downstream: Subscriber>: Subscription, Cancellable
+        where Downstream.Input == Output {
+        typealias Failure = Downstream.Failure
+
+        @Protected
+        private var downstream: Downstream?
+        private let request: DataRequest
+        private let responseHandler: Handler
+
+        init(request: DataRequest, responseHandler: @escaping Handler, downstream: Downstream) {
+            self.request = request
+            self.responseHandler = responseHandler
+            self.downstream = downstream
+        }
+
+        func request(_ demand: Subscribers.Demand) {
+            assert(demand > 0)
+
+            guard let downstream = downstream else { return }
+
+            self.downstream = nil
+            responseHandler { response in
+                _ = downstream.receive(response)
+                downstream.receive(completion: .finished)
+            }.resume()
+        }
+
+        func cancel() {
+            request.cancel()
+            downstream = nil
+        }
+    }
+}
+
+@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+extension DataResponsePublisher where Value == Data? {
+    /// Creates an instance which publishes a `DataResponse<Data?, AFError>` value without serialization.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public init(_ request: DataRequest, queue: DispatchQueue) {
+        self.request = request
+        responseHandler = { request.response(queue: queue, completionHandler: $0) }
+    }
+}
+
+extension DataRequest {
+    /// Creates a `DataResponsePublisher` for this instance using the given `ResponseSerializer` and `DispatchQueue`.
+    ///
+    /// - Parameters:
+    ///   - serializer: `ResponseSerializer` used to serialize response `Data`.
+    ///   - queue:      `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///
+    /// - Returns:      The `DataResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishResponse<Serializer: ResponseSerializer, T>(using serializer: Serializer, on queue: DispatchQueue = .main) -> DataResponsePublisher<T>
+        where Serializer.SerializedObject == T {
+        DataResponsePublisher(self, queue: queue, serializer: serializer)
+    }
+
+    /// Creates a `DataResponsePublisher` for this instance and uses a `DataResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameters:
+    ///   - queue:               `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///   - preprocessor:        `DataPreprocessor` which filters the `Data` before serialization. `PassthroughPreprocessor()`
+    ///                          by default.
+    ///   - emptyResponseCodes:  `Set<Int>` of HTTP status codes for which empty responses are allowed. `[204, 205]` by
+    ///                          default.
+    ///   - emptyRequestMethods: `Set<HTTPMethod>` of `HTTPMethod`s for which empty responses are allowed, regardless of
+    ///                          status code. `[.head]` by default.
+    /// - Returns:               The `DataResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishData(queue: DispatchQueue = .main,
+                            preprocessor: DataPreprocessor = DataResponseSerializer.defaultDataPreprocessor,
+                            emptyResponseCodes: Set<Int> = DataResponseSerializer.defaultEmptyResponseCodes,
+                            emptyRequestMethods: Set<HTTPMethod> = DataResponseSerializer.defaultEmptyRequestMethods) -> DataResponsePublisher<Data> {
+        publishResponse(using: DataResponseSerializer(dataPreprocessor: preprocessor,
+                                                      emptyResponseCodes: emptyResponseCodes,
+                                                      emptyRequestMethods: emptyRequestMethods),
+                        on: queue)
+    }
+
+    /// Creates a `DataResponsePublisher` for this instance and uses a `StringResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameters:
+    ///   - queue:               `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///   - preprocessor:        `DataPreprocessor` which filters the `Data` before serialization. `PassthroughPreprocessor()`
+    ///                          by default.
+    ///   - encoding:            `String.Encoding` to parse the response. `nil` by default, in which case the encoding
+    ///                          will be determined by the server response, falling back to the default HTTP character
+    ///                          set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  `Set<Int>` of HTTP status codes for which empty responses are allowed. `[204, 205]` by
+    ///                          default.
+    ///   - emptyRequestMethods: `Set<HTTPMethod>` of `HTTPMethod`s for which empty responses are allowed, regardless of
+    ///                          status code. `[.head]` by default.
+    ///
+    /// - Returns:               The `DataResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishString(queue: DispatchQueue = .main,
+                              preprocessor: DataPreprocessor = StringResponseSerializer.defaultDataPreprocessor,
+                              encoding: String.Encoding? = nil,
+                              emptyResponseCodes: Set<Int> = StringResponseSerializer.defaultEmptyResponseCodes,
+                              emptyRequestMethods: Set<HTTPMethod> = StringResponseSerializer.defaultEmptyRequestMethods) -> DataResponsePublisher<String> {
+        publishResponse(using: StringResponseSerializer(dataPreprocessor: preprocessor,
+                                                        encoding: encoding,
+                                                        emptyResponseCodes: emptyResponseCodes,
+                                                        emptyRequestMethods: emptyRequestMethods),
+                        on: queue)
+    }
+
+    /// Creates a `DataResponsePublisher` for this instance and uses a `DecodableResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameters:
+    ///   - type:                `Decodable` type to which to decode response `Data`. Inferred from the context by default.
+    ///   - queue:               `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///   - preprocessor:        `DataPreprocessor` which filters the `Data` before serialization. `PassthroughPreprocessor()`
+    ///                          by default.
+    ///   - decoder:             `DataDecoder` instance used to decode response `Data`. `JSONDecoder()` by default.
+    ///   - emptyResponseCodes:  `Set<Int>` of HTTP status codes for which empty responses are allowed. `[204, 205]` by
+    ///                          default.
+    ///   - emptyRequestMethods: `Set<HTTPMethod>` of `HTTPMethod`s for which empty responses are allowed, regardless of
+    ///                          status code. `[.head]` by default.
+    ///
+    /// - Returns:               The `DataResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishDecodable<T: Decodable>(type: T.Type = T.self,
+                                               queue: DispatchQueue = .main,
+                                               preprocessor: DataPreprocessor = DecodableResponseSerializer<T>.defaultDataPreprocessor,
+                                               decoder: DataDecoder = JSONDecoder(),
+                                               emptyResponseCodes: Set<Int> = DecodableResponseSerializer<T>.defaultEmptyResponseCodes,
+                                               emptyResponseMethods: Set<HTTPMethod> = DecodableResponseSerializer<T>.defaultEmptyRequestMethods) -> DataResponsePublisher<T> {
+        publishResponse(using: DecodableResponseSerializer(dataPreprocessor: preprocessor,
+                                                           decoder: decoder,
+                                                           emptyResponseCodes: emptyResponseCodes,
+                                                           emptyRequestMethods: emptyResponseMethods),
+                        on: queue)
+    }
+
+    /// Creates a `DataResponsePublisher` for this instance which does not serialize the response before publishing.
+    ///
+    ///   - queue: `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///
+    /// - Returns: The `DataResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishUnserialized(queue: DispatchQueue = .main) -> DataResponsePublisher<Data?> {
+        DataResponsePublisher(self, queue: queue)
+    }
+}
+
+// A Combine `Publisher` that publishes a sequence of `Stream<Value, AFError>` values received by the provided `DataStreamRequest`.
+@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+public struct DataStreamPublisher<Value>: Publisher {
+    public typealias Output = DataStreamRequest.Stream<Value, AFError>
+    public typealias Failure = Never
+
+    private typealias Handler = (@escaping DataStreamRequest.Handler<Value, AFError>) -> DataStreamRequest
+
+    private let request: DataStreamRequest
+    private let streamHandler: Handler
+
+    /// Creates an instance which will serialize responses using the provided `DataStreamSerializer`.
+    ///
+    /// - Parameters:
+    ///   - request:    `DataStreamRequest` for which to publish the response.
+    ///   - queue:      `DispatchQueue` on which the `Stream<Value, AFError>` values will be published. `.main` by
+    ///                 default.
+    ///   - serializer: `DataStreamSerializer` used to produce the published `Stream<Value, AFError>` values.
+    public init<Serializer: DataStreamSerializer>(_ request: DataStreamRequest, queue: DispatchQueue, serializer: Serializer)
+        where Value == Serializer.SerializedObject {
+        self.request = request
+        streamHandler = { request.responseStream(using: serializer, on: queue, stream: $0) }
+    }
+
+    /// Publishes only the `Result` of the `DataStreamRequest.Stream`'s `Event`s.
+    ///
+    /// - Returns: The `AnyPublisher` publishing the `Result<Value, AFError>` value.
+    public func result() -> AnyPublisher<Result<Value, AFError>, Never> {
+        compactMap { stream in
+            switch stream.event {
+            case let .stream(result):
+                return result
+            // If the stream has completed with an error, send the error value downstream as a `.failure`.
+            case let .complete(completion):
+                return completion.error.map(Result.failure)
+            }
+        }
+        .eraseToAnyPublisher()
+    }
+
+    /// Publishes the streamed values of the `DataStreamRequest.Stream` as a sequence of `Value` or fail with the
+    /// `AFError` instance.
+    ///
+    /// - Returns: The `AnyPublisher<Value, AFError>` publishing the stream.
+    public func value() -> AnyPublisher<Value, AFError> {
+        result().setFailureType(to: AFError.self).flatMap { $0.publisher }.eraseToAnyPublisher()
+    }
+
+    public func receive<S>(subscriber: S) where S: Subscriber, DataStreamPublisher.Failure == S.Failure, DataStreamPublisher.Output == S.Input {
+        subscriber.receive(subscription: Inner(request: request,
+                                               streamHandler: streamHandler,
+                                               downstream: subscriber))
+    }
+
+    private final class Inner<Downstream: Subscriber>: Subscription, Cancellable
+        where Downstream.Input == Output {
+        typealias Failure = Downstream.Failure
+
+        @Protected
+        private var downstream: Downstream?
+        private let request: DataStreamRequest
+        private let streamHandler: Handler
+
+        init(request: DataStreamRequest, streamHandler: @escaping Handler, downstream: Downstream) {
+            self.request = request
+            self.streamHandler = streamHandler
+            self.downstream = downstream
+        }
+
+        func request(_ demand: Subscribers.Demand) {
+            assert(demand > 0)
+
+            guard let downstream = downstream else { return }
+
+            self.downstream = nil
+            streamHandler { stream in
+                _ = downstream.receive(stream)
+                if case .complete = stream.event {
+                    downstream.receive(completion: .finished)
+                }
+            }.resume()
+        }
+
+        func cancel() {
+            request.cancel()
+            downstream = nil
+        }
+    }
+}
+
+extension DataStreamRequest {
+    /// Creates a `DataStreamPublisher` for this instance using the given `DataStreamSerializer` and `DispatchQueue`.
+    ///
+    /// - Parameters:
+    ///   - serializer: `DataStreamSerializer` used to serialize the streamed `Data`.
+    ///   - queue:      `DispatchQueue` on which the `DataRequest.Stream` values will be published. `.main` by default.
+    /// - Returns:      The `DataStreamPublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishStream<Serializer: DataStreamSerializer>(using serializer: Serializer,
+                                                                on queue: DispatchQueue = .main) -> DataStreamPublisher<Serializer.SerializedObject> {
+        DataStreamPublisher(self, queue: queue, serializer: serializer)
+    }
+
+    /// Creates a `DataStreamPublisher` for this instance which uses a `PassthroughStreamSerializer` to stream `Data`
+    /// unserialized.
+    ///
+    /// - Parameters:
+    ///   - queue:      `DispatchQueue` on which the `DataRequest.Stream` values will be published. `.main` by default.
+    /// - Returns:      The `DataStreamPublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishData(queue: DispatchQueue = .main) -> DataStreamPublisher<Data> {
+        publishStream(using: PassthroughStreamSerializer(), on: queue)
+    }
+
+    /// Creates a `DataStreamPublisher` for this instance which uses a `StringStreamSerializer` to serialize stream
+    /// `Data` values into `String` values.
+    ///
+    /// - Parameters:
+    ///   - queue:      `DispatchQueue` on which the `DataRequest.Stream` values will be published. `.main` by default.
+    /// - Returns:      The `DataStreamPublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishString(queue: DispatchQueue = .main) -> DataStreamPublisher<String> {
+        publishStream(using: StringStreamSerializer(), on: queue)
+    }
+
+    /// Creates a `DataStreamPublisher` for this instance which uses a `DecodableStreamSerializer` with the provided
+    /// parameters to serialize stream `Data` values into the provided type.
+    ///
+    /// - Parameters:
+    ///   - type:         `Decodable` type to which to decode stream `Data`. Inferred from the context by default.
+    ///   - queue:        `DispatchQueue` on which the `DataRequest.Stream` values will be published. `.main` by default.
+    ///   - decoder:      `DataDecoder` instance used to decode stream `Data`. `JSONDecoder()` by default.
+    ///   - preprocessor: `DataPreprocessor` which filters incoming stream `Data` before serialization.
+    ///                   `PassthroughPreprocessor()` by default.
+    /// - Returns:        The `DataStreamPublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishDecodable<T: Decodable>(type: T.Type = T.self,
+                                               queue: DispatchQueue = .main,
+                                               decoder: DataDecoder = JSONDecoder(),
+                                               preprocessor: DataPreprocessor = PassthroughPreprocessor()) -> DataStreamPublisher<T> {
+        publishStream(using: DecodableStreamSerializer(decoder: decoder,
+                                                       dataPreprocessor: preprocessor),
+                      on: queue)
+    }
+}
+
+/// A Combine `Publisher` that publishes the `DownloadResponse<Value, AFError>` of the provided `DownloadRequest`.
+@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+public struct DownloadResponsePublisher<Value>: Publisher {
+    public typealias Output = DownloadResponse<Value, AFError>
+    public typealias Failure = Never
+
+    private typealias Handler = (@escaping (_ response: DownloadResponse<Value, AFError>) -> Void) -> DownloadRequest
+
+    private let request: DownloadRequest
+    private let responseHandler: Handler
+
+    /// Creates an instance which will serialize responses using the provided `ResponseSerializer`.
+    ///
+    /// - Parameters:
+    ///   - request:    `DownloadRequest` for which to publish the response.
+    ///   - queue:      `DispatchQueue` on which the `DownloadResponse` value will be published. `.main` by default.
+    ///   - serializer: `ResponseSerializer` used to produce the published `DownloadResponse`.
+    public init<Serializer: ResponseSerializer>(_ request: DownloadRequest, queue: DispatchQueue, serializer: Serializer)
+        where Value == Serializer.SerializedObject {
+        self.request = request
+        responseHandler = { request.response(queue: queue, responseSerializer: serializer, completionHandler: $0) }
+    }
+
+    /// Creates an instance which will serialize responses using the provided `DownloadResponseSerializerProtocol` value.
+    ///
+    /// - Parameters:
+    ///   - request:    `DownloadRequest` for which to publish the response.
+    ///   - queue:      `DispatchQueue` on which the `DataResponse` value will be published. `.main` by default.
+    ///   - serializer: `DownloadResponseSerializerProtocol` used to produce the published `DownloadResponse`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public init<Serializer: DownloadResponseSerializerProtocol>(_ request: DownloadRequest,
+                                                                queue: DispatchQueue,
+                                                                serializer: Serializer)
+        where Value == Serializer.SerializedObject {
+        self.request = request
+        responseHandler = { request.response(queue: queue, responseSerializer: serializer, completionHandler: $0) }
+    }
+
+    /// Publishes only the `Result` of the `DownloadResponse` value.
+    ///
+    /// - Returns: The `AnyPublisher` publishing the `Result<Value, AFError>` value.
+    public func result() -> AnyPublisher<Result<Value, AFError>, Never> {
+        map { $0.result }.eraseToAnyPublisher()
+    }
+
+    /// Publishes the `Result` of the `DownloadResponse` as a single `Value` or fail with the `AFError` instance.
+    ///
+    /// - Returns: The `AnyPublisher<Value, AFError>` publishing the stream.
+    public func value() -> AnyPublisher<Value, AFError> {
+        setFailureType(to: AFError.self).flatMap { $0.result.publisher }.eraseToAnyPublisher()
+    }
+
+    public func receive<S>(subscriber: S) where S: Subscriber, DownloadResponsePublisher.Failure == S.Failure, DownloadResponsePublisher.Output == S.Input {
+        subscriber.receive(subscription: Inner(request: request,
+                                               responseHandler: responseHandler,
+                                               downstream: subscriber))
+    }
+
+    private final class Inner<Downstream: Subscriber>: Subscription, Cancellable
+        where Downstream.Input == Output {
+        typealias Failure = Downstream.Failure
+
+        @Protected
+        private var downstream: Downstream?
+        private let request: DownloadRequest
+        private let responseHandler: Handler
+
+        init(request: DownloadRequest, responseHandler: @escaping Handler, downstream: Downstream) {
+            self.request = request
+            self.responseHandler = responseHandler
+            self.downstream = downstream
+        }
+
+        func request(_ demand: Subscribers.Demand) {
+            assert(demand > 0)
+
+            guard let downstream = downstream else { return }
+
+            self.downstream = nil
+            responseHandler { response in
+                _ = downstream.receive(response)
+                downstream.receive(completion: .finished)
+            }.resume()
+        }
+
+        func cancel() {
+            request.cancel()
+            downstream = nil
+        }
+    }
+}
+
+extension DownloadRequest {
+    /// Creates a `DownloadResponsePublisher` for this instance using the given `ResponseSerializer` and `DispatchQueue`.
+    ///
+    /// - Parameters:
+    ///   - serializer: `ResponseSerializer` used to serialize the response `Data` from disk.
+    ///   - queue:      `DispatchQueue` on which the `DownloadResponse` will be published.`.main` by default.
+    ///
+    /// - Returns:      The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishResponse<Serializer: ResponseSerializer, T>(using serializer: Serializer, on queue: DispatchQueue = .main) -> DownloadResponsePublisher<T>
+        where Serializer.SerializedObject == T {
+        DownloadResponsePublisher(self, queue: queue, serializer: serializer)
+    }
+
+    /// Creates a `DownloadResponsePublisher` for this instance using the given `DownloadResponseSerializerProtocol` and
+    /// `DispatchQueue`.
+    ///
+    /// - Parameters:
+    ///   - serializer: `DownloadResponseSerializer` used to serialize the response `Data` from disk.
+    ///   - queue:      `DispatchQueue` on which the `DownloadResponse` will be published.`.main` by default.
+    ///
+    /// - Returns:      The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishResponse<Serializer: DownloadResponseSerializerProtocol, T>(using serializer: Serializer, on queue: DispatchQueue = .main) -> DownloadResponsePublisher<T>
+        where Serializer.SerializedObject == T {
+        DownloadResponsePublisher(self, queue: queue, serializer: serializer)
+    }
+
+    /// Creates a `DownloadResponsePublisher` for this instance and uses a `URLResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameter queue: `DispatchQueue` on which the `DownloadResponse` will be published. `.main` by default.
+    ///
+    /// - Returns:         The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishURL(queue: DispatchQueue = .main) -> DownloadResponsePublisher<URL> {
+        publishResponse(using: URLResponseSerializer(), on: queue)
+    }
+
+    /// Creates a `DownloadResponsePublisher` for this instance and uses a `DataResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameters:
+    ///   - queue:               `DispatchQueue` on which the `DownloadResponse` will be published. `.main` by default.
+    ///   - preprocessor:        `DataPreprocessor` which filters the `Data` before serialization. `PassthroughPreprocessor()`
+    ///                          by default.
+    ///   - emptyResponseCodes:  `Set<Int>` of HTTP status codes for which empty responses are allowed. `[204, 205]` by
+    ///                          default.
+    ///   - emptyRequestMethods: `Set<HTTPMethod>` of `HTTPMethod`s for which empty responses are allowed, regardless of
+    ///                          status code. `[.head]` by default.
+    ///
+    /// - Returns:               The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishData(queue: DispatchQueue = .main,
+                            preprocessor: DataPreprocessor = DataResponseSerializer.defaultDataPreprocessor,
+                            emptyResponseCodes: Set<Int> = DataResponseSerializer.defaultEmptyResponseCodes,
+                            emptyRequestMethods: Set<HTTPMethod> = DataResponseSerializer.defaultEmptyRequestMethods) -> DownloadResponsePublisher<Data> {
+        publishResponse(using: DataResponseSerializer(dataPreprocessor: preprocessor,
+                                                      emptyResponseCodes: emptyResponseCodes,
+                                                      emptyRequestMethods: emptyRequestMethods),
+                        on: queue)
+    }
+
+    /// Creates a `DataResponsePublisher` for this instance and uses a `StringResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameters:
+    ///   - queue:               `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///   - preprocessor:        `DataPreprocessor` which filters the `Data` before serialization. `PassthroughPreprocessor()`
+    ///                          by default.
+    ///   - encoding:            `String.Encoding` to parse the response. `nil` by default, in which case the encoding
+    ///                          will be determined by the server response, falling back to the default HTTP character
+    ///                          set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  `Set<Int>` of HTTP status codes for which empty responses are allowed. `[204, 205]` by
+    ///                          default.
+    ///   - emptyRequestMethods: `Set<HTTPMethod>` of `HTTPMethod`s for which empty responses are allowed, regardless of
+    ///                          status code. `[.head]` by default.
+    ///
+    /// - Returns:               The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishString(queue: DispatchQueue = .main,
+                              preprocessor: DataPreprocessor = StringResponseSerializer.defaultDataPreprocessor,
+                              encoding: String.Encoding? = nil,
+                              emptyResponseCodes: Set<Int> = StringResponseSerializer.defaultEmptyResponseCodes,
+                              emptyRequestMethods: Set<HTTPMethod> = StringResponseSerializer.defaultEmptyRequestMethods) -> DownloadResponsePublisher<String> {
+        publishResponse(using: StringResponseSerializer(dataPreprocessor: preprocessor,
+                                                        encoding: encoding,
+                                                        emptyResponseCodes: emptyResponseCodes,
+                                                        emptyRequestMethods: emptyRequestMethods),
+                        on: queue)
+    }
+
+    /// Creates a `DataResponsePublisher` for this instance and uses a `DecodableResponseSerializer` to serialize the
+    /// response.
+    ///
+    /// - Parameters:
+    ///   - type:                `Decodable` type to which to decode response `Data`. Inferred from the context by default.
+    ///   - queue:               `DispatchQueue` on which the `DataResponse` will be published. `.main` by default.
+    ///   - preprocessor:        `DataPreprocessor` which filters the `Data` before serialization. `PassthroughPreprocessor()`
+    ///                          by default.
+    ///   - decoder:             `DataDecoder` instance used to decode response `Data`. `JSONDecoder()` by default.
+    ///   - emptyResponseCodes:  `Set<Int>` of HTTP status codes for which empty responses are allowed. `[204, 205]` by
+    ///                          default.
+    ///   - emptyRequestMethods: `Set<HTTPMethod>` of `HTTPMethod`s for which empty responses are allowed, regardless of
+    ///                          status code. `[.head]` by default.
+    ///
+    /// - Returns:               The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishDecodable<T: Decodable>(type: T.Type = T.self,
+                                               queue: DispatchQueue = .main,
+                                               preprocessor: DataPreprocessor = DecodableResponseSerializer<T>.defaultDataPreprocessor,
+                                               decoder: DataDecoder = JSONDecoder(),
+                                               emptyResponseCodes: Set<Int> = DecodableResponseSerializer<T>.defaultEmptyResponseCodes,
+                                               emptyResponseMethods: Set<HTTPMethod> = DecodableResponseSerializer<T>.defaultEmptyRequestMethods) -> DownloadResponsePublisher<T> {
+        publishResponse(using: DecodableResponseSerializer(dataPreprocessor: preprocessor,
+                                                           decoder: decoder,
+                                                           emptyResponseCodes: emptyResponseCodes,
+                                                           emptyRequestMethods: emptyResponseMethods),
+                        on: queue)
+    }
+}
+
+@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+extension DownloadResponsePublisher where Value == URL? {
+    /// Creates an instance which publishes a `DownloadResponse<URL?, AFError>` value without serialization.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public init(_ request: DownloadRequest, queue: DispatchQueue) {
+        self.request = request
+        responseHandler = { request.response(queue: queue, completionHandler: $0) }
+    }
+}
+
+extension DownloadRequest {
+    /// Creates a `DownloadResponsePublisher` for this instance which does not serialize the response before publishing.
+    ///
+    /// - Parameter queue: `DispatchQueue` on which the `DownloadResponse` will be published. `.main` by default.
+    ///
+    /// - Returns:         The `DownloadResponsePublisher`.
+    @available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
+    public func publishUnserialized(on queue: DispatchQueue = .main) -> DownloadResponsePublisher<URL?> {
+        DownloadResponsePublisher(self, queue: queue)
+    }
+}
+
+#endif

Pods/Alamofire/Source/DispatchQueue+Alamofire.swift

@@ -0,0 +1,37 @@
+//
+//  DispatchQueue+Alamofire.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Dispatch
+import Foundation
+
+extension DispatchQueue {
+    /// Execute the provided closure after a `TimeInterval`.
+    ///
+    /// - Parameters:
+    ///   - delay:   `TimeInterval` to delay execution.
+    ///   - closure: Closure to execute.
+    func after(_ delay: TimeInterval, execute closure: @escaping () -> Void) {
+        asyncAfter(deadline: .now() + delay, execute: closure)
+    }
+}

Pods/Alamofire/Source/EventMonitor.swift

@@ -0,0 +1,892 @@
+//
+//  EventMonitor.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Protocol outlining the lifetime events inside Alamofire. It includes both events received from the various
+/// `URLSession` delegate protocols as well as various events from the lifetime of `Request` and its subclasses.
+public protocol EventMonitor {
+    /// The `DispatchQueue` onto which Alamofire's root `CompositeEventMonitor` will dispatch events. `.main` by default.
+    var queue: DispatchQueue { get }
+
+    // MARK: - URLSession Events
+
+    // MARK: URLSessionDelegate Events
+
+    /// Event called during `URLSessionDelegate`'s `urlSession(_:didBecomeInvalidWithError:)` method.
+    func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?)
+
+    // MARK: URLSessionTaskDelegate Events
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:task:didReceive:completionHandler:)` method.
+    func urlSession(_ session: URLSession, task: URLSessionTask, didReceive challenge: URLAuthenticationChallenge)
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:)` method.
+    func urlSession(_ session: URLSession,
+                    task: URLSessionTask,
+                    didSendBodyData bytesSent: Int64,
+                    totalBytesSent: Int64,
+                    totalBytesExpectedToSend: Int64)
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:task:needNewBodyStream:)` method.
+    func urlSession(_ session: URLSession, taskNeedsNewBodyStream task: URLSessionTask)
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:task:willPerformHTTPRedirection:newRequest:completionHandler:)` method.
+    func urlSession(_ session: URLSession,
+                    task: URLSessionTask,
+                    willPerformHTTPRedirection response: HTTPURLResponse,
+                    newRequest request: URLRequest)
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:task:didFinishCollecting:)` method.
+    func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics)
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:task:didCompleteWithError:)` method.
+    func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?)
+
+    /// Event called during `URLSessionTaskDelegate`'s `urlSession(_:taskIsWaitingForConnectivity:)` method.
+    @available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
+    func urlSession(_ session: URLSession, taskIsWaitingForConnectivity task: URLSessionTask)
+
+    // MARK: URLSessionDataDelegate Events
+
+    /// Event called during `URLSessionDataDelegate`'s `urlSession(_:dataTask:didReceive:)` method.
+    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data)
+
+    /// Event called during `URLSessionDataDelegate`'s `urlSession(_:dataTask:willCacheResponse:completionHandler:)` method.
+    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, willCacheResponse proposedResponse: CachedURLResponse)
+
+    // MARK: URLSessionDownloadDelegate Events
+
+    /// Event called during `URLSessionDownloadDelegate`'s `urlSession(_:downloadTask:didResumeAtOffset:expectedTotalBytes:)` method.
+    func urlSession(_ session: URLSession,
+                    downloadTask: URLSessionDownloadTask,
+                    didResumeAtOffset fileOffset: Int64,
+                    expectedTotalBytes: Int64)
+
+    /// Event called during `URLSessionDownloadDelegate`'s `urlSession(_:downloadTask:didWriteData:totalBytesWritten:totalBytesExpectedToWrite:)` method.
+    func urlSession(_ session: URLSession,
+                    downloadTask: URLSessionDownloadTask,
+                    didWriteData bytesWritten: Int64,
+                    totalBytesWritten: Int64,
+                    totalBytesExpectedToWrite: Int64)
+
+    /// Event called during `URLSessionDownloadDelegate`'s `urlSession(_:downloadTask:didFinishDownloadingTo:)` method.
+    func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL)
+
+    // MARK: - Request Events
+
+    /// Event called when a `URLRequest` is first created for a `Request`. If a `RequestAdapter` is active, the
+    /// `URLRequest` will be adapted before being issued.
+    func request(_ request: Request, didCreateInitialURLRequest urlRequest: URLRequest)
+
+    /// Event called when the attempt to create a `URLRequest` from a `Request`'s original `URLRequestConvertible` value fails.
+    func request(_ request: Request, didFailToCreateURLRequestWithError error: AFError)
+
+    /// Event called when a `RequestAdapter` adapts the `Request`'s initial `URLRequest`.
+    func request(_ request: Request, didAdaptInitialRequest initialRequest: URLRequest, to adaptedRequest: URLRequest)
+
+    /// Event called when a `RequestAdapter` fails to adapt the `Request`'s initial `URLRequest`.
+    func request(_ request: Request, didFailToAdaptURLRequest initialRequest: URLRequest, withError error: AFError)
+
+    /// Event called when a final `URLRequest` is created for a `Request`.
+    func request(_ request: Request, didCreateURLRequest urlRequest: URLRequest)
+
+    /// Event called when a `URLSessionTask` subclass instance is created for a `Request`.
+    func request(_ request: Request, didCreateTask task: URLSessionTask)
+
+    /// Event called when a `Request` receives a `URLSessionTaskMetrics` value.
+    func request(_ request: Request, didGatherMetrics metrics: URLSessionTaskMetrics)
+
+    /// Event called when a `Request` fails due to an error created by Alamofire. e.g. When certificate pinning fails.
+    func request(_ request: Request, didFailTask task: URLSessionTask, earlyWithError error: AFError)
+
+    /// Event called when a `Request`'s task completes, possibly with an error. A `Request` may receive this event
+    /// multiple times if it is retried.
+    func request(_ request: Request, didCompleteTask task: URLSessionTask, with error: AFError?)
+
+    /// Event called when a `Request` is about to be retried.
+    func requestIsRetrying(_ request: Request)
+
+    /// Event called when a `Request` finishes and response serializers are being called.
+    func requestDidFinish(_ request: Request)
+
+    /// Event called when a `Request` receives a `resume` call.
+    func requestDidResume(_ request: Request)
+
+    /// Event called when a `Request`'s associated `URLSessionTask` is resumed.
+    func request(_ request: Request, didResumeTask task: URLSessionTask)
+
+    /// Event called when a `Request` receives a `suspend` call.
+    func requestDidSuspend(_ request: Request)
+
+    /// Event called when a `Request`'s associated `URLSessionTask` is suspended.
+    func request(_ request: Request, didSuspendTask task: URLSessionTask)
+
+    /// Event called when a `Request` receives a `cancel` call.
+    func requestDidCancel(_ request: Request)
+
+    /// Event called when a `Request`'s associated `URLSessionTask` is cancelled.
+    func request(_ request: Request, didCancelTask task: URLSessionTask)
+
+    // MARK: DataRequest Events
+
+    /// Event called when a `DataRequest` calls a `Validation`.
+    func request(_ request: DataRequest,
+                 didValidateRequest urlRequest: URLRequest?,
+                 response: HTTPURLResponse,
+                 data: Data?,
+                 withResult result: Request.ValidationResult)
+
+    /// Event called when a `DataRequest` creates a `DataResponse<Data?>` value without calling a `ResponseSerializer`.
+    func request(_ request: DataRequest, didParseResponse response: DataResponse<Data?, AFError>)
+
+    /// Event called when a `DataRequest` calls a `ResponseSerializer` and creates a generic `DataResponse<Value, AFError>`.
+    func request<Value>(_ request: DataRequest, didParseResponse response: DataResponse<Value, AFError>)
+
+    // MARK: DataStreamRequest Events
+
+    /// Event called when a `DataStreamRequest` calls a `Validation` closure.
+    ///
+    /// - Parameters:
+    ///   - request:    `DataStreamRequest` which is calling the `Validation`.
+    ///   - urlRequest: `URLRequest` of the request being validated.
+    ///   - response:   `HTTPURLResponse` of the request being validated.
+    ///   - result:      Produced `ValidationResult`.
+    func request(_ request: DataStreamRequest,
+                 didValidateRequest urlRequest: URLRequest?,
+                 response: HTTPURLResponse,
+                 withResult result: Request.ValidationResult)
+
+    /// Event called when a `DataStreamSerializer` produces a value from streamed `Data`.
+    ///
+    /// - Parameters:
+    ///   - request: `DataStreamRequest` for which the value was serialized.
+    ///   - result:  `Result` of the serialization attempt.
+    func request<Value>(_ request: DataStreamRequest, didParseStream result: Result<Value, AFError>)
+
+    // MARK: UploadRequest Events
+
+    /// Event called when an `UploadRequest` creates its `Uploadable` value, indicating the type of upload it represents.
+    func request(_ request: UploadRequest, didCreateUploadable uploadable: UploadRequest.Uploadable)
+
+    /// Event called when an `UploadRequest` failed to create its `Uploadable` value due to an error.
+    func request(_ request: UploadRequest, didFailToCreateUploadableWithError error: AFError)
+
+    /// Event called when an `UploadRequest` provides the `InputStream` from its `Uploadable` value. This only occurs if
+    /// the `InputStream` does not wrap a `Data` value or file `URL`.
+    func request(_ request: UploadRequest, didProvideInputStream stream: InputStream)
+
+    // MARK: DownloadRequest Events
+
+    /// Event called when a `DownloadRequest`'s `URLSessionDownloadTask` finishes and the temporary file has been moved.
+    func request(_ request: DownloadRequest, didFinishDownloadingUsing task: URLSessionTask, with result: Result<URL, AFError>)
+
+    /// Event called when a `DownloadRequest`'s `Destination` closure is called and creates the destination URL the
+    /// downloaded file will be moved to.
+    func request(_ request: DownloadRequest, didCreateDestinationURL url: URL)
+
+    /// Event called when a `DownloadRequest` calls a `Validation`.
+    func request(_ request: DownloadRequest,
+                 didValidateRequest urlRequest: URLRequest?,
+                 response: HTTPURLResponse,
+                 fileURL: URL?,
+                 withResult result: Request.ValidationResult)
+
+    /// Event called when a `DownloadRequest` creates a `DownloadResponse<URL?, AFError>` without calling a `ResponseSerializer`.
+    func request(_ request: DownloadRequest, didParseResponse response: DownloadResponse<URL?, AFError>)
+
+    /// Event called when a `DownloadRequest` calls a `DownloadResponseSerializer` and creates a generic `DownloadResponse<Value, AFError>`
+    func request<Value>(_ request: DownloadRequest, didParseResponse response: DownloadResponse<Value, AFError>)
+}
+
+extension EventMonitor {
+    /// The default queue on which `CompositeEventMonitor`s will call the `EventMonitor` methods. `.main` by default.
+    public var queue: DispatchQueue { .main }
+
+    // MARK: Default Implementations
+
+    public func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?) {}
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           didReceive challenge: URLAuthenticationChallenge) {}
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           didSendBodyData bytesSent: Int64,
+                           totalBytesSent: Int64,
+                           totalBytesExpectedToSend: Int64) {}
+    public func urlSession(_ session: URLSession, taskNeedsNewBodyStream task: URLSessionTask) {}
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           willPerformHTTPRedirection response: HTTPURLResponse,
+                           newRequest request: URLRequest) {}
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           didFinishCollecting metrics: URLSessionTaskMetrics) {}
+    public func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {}
+    public func urlSession(_ session: URLSession, taskIsWaitingForConnectivity task: URLSessionTask) {}
+    public func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {}
+    public func urlSession(_ session: URLSession,
+                           dataTask: URLSessionDataTask,
+                           willCacheResponse proposedResponse: CachedURLResponse) {}
+    public func urlSession(_ session: URLSession,
+                           downloadTask: URLSessionDownloadTask,
+                           didResumeAtOffset fileOffset: Int64,
+                           expectedTotalBytes: Int64) {}
+    public func urlSession(_ session: URLSession,
+                           downloadTask: URLSessionDownloadTask,
+                           didWriteData bytesWritten: Int64,
+                           totalBytesWritten: Int64,
+                           totalBytesExpectedToWrite: Int64) {}
+    public func urlSession(_ session: URLSession,
+                           downloadTask: URLSessionDownloadTask,
+                           didFinishDownloadingTo location: URL) {}
+    public func request(_ request: Request, didCreateInitialURLRequest urlRequest: URLRequest) {}
+    public func request(_ request: Request, didFailToCreateURLRequestWithError error: AFError) {}
+    public func request(_ request: Request,
+                        didAdaptInitialRequest initialRequest: URLRequest,
+                        to adaptedRequest: URLRequest) {}
+    public func request(_ request: Request,
+                        didFailToAdaptURLRequest initialRequest: URLRequest,
+                        withError error: AFError) {}
+    public func request(_ request: Request, didCreateURLRequest urlRequest: URLRequest) {}
+    public func request(_ request: Request, didCreateTask task: URLSessionTask) {}
+    public func request(_ request: Request, didGatherMetrics metrics: URLSessionTaskMetrics) {}
+    public func request(_ request: Request, didFailTask task: URLSessionTask, earlyWithError error: AFError) {}
+    public func request(_ request: Request, didCompleteTask task: URLSessionTask, with error: AFError?) {}
+    public func requestIsRetrying(_ request: Request) {}
+    public func requestDidFinish(_ request: Request) {}
+    public func requestDidResume(_ request: Request) {}
+    public func request(_ request: Request, didResumeTask task: URLSessionTask) {}
+    public func requestDidSuspend(_ request: Request) {}
+    public func request(_ request: Request, didSuspendTask task: URLSessionTask) {}
+    public func requestDidCancel(_ request: Request) {}
+    public func request(_ request: Request, didCancelTask task: URLSessionTask) {}
+    public func request(_ request: DataRequest,
+                        didValidateRequest urlRequest: URLRequest?,
+                        response: HTTPURLResponse,
+                        data: Data?,
+                        withResult result: Request.ValidationResult) {}
+    public func request(_ request: DataRequest, didParseResponse response: DataResponse<Data?, AFError>) {}
+    public func request<Value>(_ request: DataRequest, didParseResponse response: DataResponse<Value, AFError>) {}
+    public func request(_ request: DataStreamRequest,
+                        didValidateRequest urlRequest: URLRequest?,
+                        response: HTTPURLResponse,
+                        withResult result: Request.ValidationResult) {}
+    public func request<Value>(_ request: DataStreamRequest, didParseStream result: Result<Value, AFError>) {}
+    public func request(_ request: UploadRequest, didCreateUploadable uploadable: UploadRequest.Uploadable) {}
+    public func request(_ request: UploadRequest, didFailToCreateUploadableWithError error: AFError) {}
+    public func request(_ request: UploadRequest, didProvideInputStream stream: InputStream) {}
+    public func request(_ request: DownloadRequest, didFinishDownloadingUsing task: URLSessionTask, with result: Result<URL, AFError>) {}
+    public func request(_ request: DownloadRequest, didCreateDestinationURL url: URL) {}
+    public func request(_ request: DownloadRequest,
+                        didValidateRequest urlRequest: URLRequest?,
+                        response: HTTPURLResponse,
+                        fileURL: URL?,
+                        withResult result: Request.ValidationResult) {}
+    public func request(_ request: DownloadRequest, didParseResponse response: DownloadResponse<URL?, AFError>) {}
+    public func request<Value>(_ request: DownloadRequest, didParseResponse response: DownloadResponse<Value, AFError>) {}
+}
+
+/// An `EventMonitor` which can contain multiple `EventMonitor`s and calls their methods on their queues.
+public final class CompositeEventMonitor: EventMonitor {
+    public let queue = DispatchQueue(label: "org.alamofire.compositeEventMonitor", qos: .utility)
+
+    let monitors: [EventMonitor]
+
+    init(monitors: [EventMonitor]) {
+        self.monitors = monitors
+    }
+
+    func performEvent(_ event: @escaping (EventMonitor) -> Void) {
+        queue.async {
+            for monitor in self.monitors {
+                monitor.queue.async { event(monitor) }
+            }
+        }
+    }
+
+    public func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?) {
+        performEvent { $0.urlSession(session, didBecomeInvalidWithError: error) }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           didReceive challenge: URLAuthenticationChallenge) {
+        performEvent { $0.urlSession(session, task: task, didReceive: challenge) }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           didSendBodyData bytesSent: Int64,
+                           totalBytesSent: Int64,
+                           totalBytesExpectedToSend: Int64) {
+        performEvent {
+            $0.urlSession(session,
+                          task: task,
+                          didSendBodyData: bytesSent,
+                          totalBytesSent: totalBytesSent,
+                          totalBytesExpectedToSend: totalBytesExpectedToSend)
+        }
+    }
+
+    public func urlSession(_ session: URLSession, taskNeedsNewBodyStream task: URLSessionTask) {
+        performEvent {
+            $0.urlSession(session, taskNeedsNewBodyStream: task)
+        }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           task: URLSessionTask,
+                           willPerformHTTPRedirection response: HTTPURLResponse,
+                           newRequest request: URLRequest) {
+        performEvent {
+            $0.urlSession(session,
+                          task: task,
+                          willPerformHTTPRedirection: response,
+                          newRequest: request)
+        }
+    }
+
+    public func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics) {
+        performEvent { $0.urlSession(session, task: task, didFinishCollecting: metrics) }
+    }
+
+    public func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
+        performEvent { $0.urlSession(session, task: task, didCompleteWithError: error) }
+    }
+
+    @available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
+    public func urlSession(_ session: URLSession, taskIsWaitingForConnectivity task: URLSessionTask) {
+        performEvent { $0.urlSession(session, taskIsWaitingForConnectivity: task) }
+    }
+
+    public func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
+        performEvent { $0.urlSession(session, dataTask: dataTask, didReceive: data) }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           dataTask: URLSessionDataTask,
+                           willCacheResponse proposedResponse: CachedURLResponse) {
+        performEvent { $0.urlSession(session, dataTask: dataTask, willCacheResponse: proposedResponse) }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           downloadTask: URLSessionDownloadTask,
+                           didResumeAtOffset fileOffset: Int64,
+                           expectedTotalBytes: Int64) {
+        performEvent {
+            $0.urlSession(session,
+                          downloadTask: downloadTask,
+                          didResumeAtOffset: fileOffset,
+                          expectedTotalBytes: expectedTotalBytes)
+        }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           downloadTask: URLSessionDownloadTask,
+                           didWriteData bytesWritten: Int64,
+                           totalBytesWritten: Int64,
+                           totalBytesExpectedToWrite: Int64) {
+        performEvent {
+            $0.urlSession(session,
+                          downloadTask: downloadTask,
+                          didWriteData: bytesWritten,
+                          totalBytesWritten: totalBytesWritten,
+                          totalBytesExpectedToWrite: totalBytesExpectedToWrite)
+        }
+    }
+
+    public func urlSession(_ session: URLSession,
+                           downloadTask: URLSessionDownloadTask,
+                           didFinishDownloadingTo location: URL) {
+        performEvent { $0.urlSession(session, downloadTask: downloadTask, didFinishDownloadingTo: location) }
+    }
+
+    public func request(_ request: Request, didCreateInitialURLRequest urlRequest: URLRequest) {
+        performEvent { $0.request(request, didCreateInitialURLRequest: urlRequest) }
+    }
+
+    public func request(_ request: Request, didFailToCreateURLRequestWithError error: AFError) {
+        performEvent { $0.request(request, didFailToCreateURLRequestWithError: error) }
+    }
+
+    public func request(_ request: Request, didAdaptInitialRequest initialRequest: URLRequest, to adaptedRequest: URLRequest) {
+        performEvent { $0.request(request, didAdaptInitialRequest: initialRequest, to: adaptedRequest) }
+    }
+
+    public func request(_ request: Request, didFailToAdaptURLRequest initialRequest: URLRequest, withError error: AFError) {
+        performEvent { $0.request(request, didFailToAdaptURLRequest: initialRequest, withError: error) }
+    }
+
+    public func request(_ request: Request, didCreateURLRequest urlRequest: URLRequest) {
+        performEvent { $0.request(request, didCreateURLRequest: urlRequest) }
+    }
+
+    public func request(_ request: Request, didCreateTask task: URLSessionTask) {
+        performEvent { $0.request(request, didCreateTask: task) }
+    }
+
+    public func request(_ request: Request, didGatherMetrics metrics: URLSessionTaskMetrics) {
+        performEvent { $0.request(request, didGatherMetrics: metrics) }
+    }
+
+    public func request(_ request: Request, didFailTask task: URLSessionTask, earlyWithError error: AFError) {
+        performEvent { $0.request(request, didFailTask: task, earlyWithError: error) }
+    }
+
+    public func request(_ request: Request, didCompleteTask task: URLSessionTask, with error: AFError?) {
+        performEvent { $0.request(request, didCompleteTask: task, with: error) }
+    }
+
+    public func requestIsRetrying(_ request: Request) {
+        performEvent { $0.requestIsRetrying(request) }
+    }
+
+    public func requestDidFinish(_ request: Request) {
+        performEvent { $0.requestDidFinish(request) }
+    }
+
+    public func requestDidResume(_ request: Request) {
+        performEvent { $0.requestDidResume(request) }
+    }
+
+    public func request(_ request: Request, didResumeTask task: URLSessionTask) {
+        performEvent { $0.request(request, didResumeTask: task) }
+    }
+
+    public func requestDidSuspend(_ request: Request) {
+        performEvent { $0.requestDidSuspend(request) }
+    }
+
+    public func request(_ request: Request, didSuspendTask task: URLSessionTask) {
+        performEvent { $0.request(request, didSuspendTask: task) }
+    }
+
+    public func requestDidCancel(_ request: Request) {
+        performEvent { $0.requestDidCancel(request) }
+    }
+
+    public func request(_ request: Request, didCancelTask task: URLSessionTask) {
+        performEvent { $0.request(request, didCancelTask: task) }
+    }
+
+    public func request(_ request: DataRequest,
+                        didValidateRequest urlRequest: URLRequest?,
+                        response: HTTPURLResponse,
+                        data: Data?,
+                        withResult result: Request.ValidationResult) {
+        performEvent { $0.request(request,
+                                  didValidateRequest: urlRequest,
+                                  response: response,
+                                  data: data,
+                                  withResult: result)
+        }
+    }
+
+    public func request(_ request: DataRequest, didParseResponse response: DataResponse<Data?, AFError>) {
+        performEvent { $0.request(request, didParseResponse: response) }
+    }
+
+    public func request<Value>(_ request: DataRequest, didParseResponse response: DataResponse<Value, AFError>) {
+        performEvent { $0.request(request, didParseResponse: response) }
+    }
+
+    public func request(_ request: DataStreamRequest,
+                        didValidateRequest urlRequest: URLRequest?,
+                        response: HTTPURLResponse,
+                        withResult result: Request.ValidationResult) {
+        performEvent { $0.request(request,
+                                  didValidateRequest: urlRequest,
+                                  response: response,
+                                  withResult: result)
+        }
+    }
+
+    public func request<Value>(_ request: DataStreamRequest, didParseStream result: Result<Value, AFError>) {
+        performEvent { $0.request(request, didParseStream: result) }
+    }
+
+    public func request(_ request: UploadRequest, didCreateUploadable uploadable: UploadRequest.Uploadable) {
+        performEvent { $0.request(request, didCreateUploadable: uploadable) }
+    }
+
+    public func request(_ request: UploadRequest, didFailToCreateUploadableWithError error: AFError) {
+        performEvent { $0.request(request, didFailToCreateUploadableWithError: error) }
+    }
+
+    public func request(_ request: UploadRequest, didProvideInputStream stream: InputStream) {
+        performEvent { $0.request(request, didProvideInputStream: stream) }
+    }
+
+    public func request(_ request: DownloadRequest, didFinishDownloadingUsing task: URLSessionTask, with result: Result<URL, AFError>) {
+        performEvent { $0.request(request, didFinishDownloadingUsing: task, with: result) }
+    }
+
+    public func request(_ request: DownloadRequest, didCreateDestinationURL url: URL) {
+        performEvent { $0.request(request, didCreateDestinationURL: url) }
+    }
+
+    public func request(_ request: DownloadRequest,
+                        didValidateRequest urlRequest: URLRequest?,
+                        response: HTTPURLResponse,
+                        fileURL: URL?,
+                        withResult result: Request.ValidationResult) {
+        performEvent { $0.request(request,
+                                  didValidateRequest: urlRequest,
+                                  response: response,
+                                  fileURL: fileURL,
+                                  withResult: result) }
+    }
+
+    public func request(_ request: DownloadRequest, didParseResponse response: DownloadResponse<URL?, AFError>) {
+        performEvent { $0.request(request, didParseResponse: response) }
+    }
+
+    public func request<Value>(_ request: DownloadRequest, didParseResponse response: DownloadResponse<Value, AFError>) {
+        performEvent { $0.request(request, didParseResponse: response) }
+    }
+}
+
+/// `EventMonitor` that allows optional closures to be set to receive events.
+open class ClosureEventMonitor: EventMonitor {
+    /// Closure called on the `urlSession(_:didBecomeInvalidWithError:)` event.
+    open var sessionDidBecomeInvalidWithError: ((URLSession, Error?) -> Void)?
+
+    /// Closure called on the `urlSession(_:task:didReceive:completionHandler:)`.
+    open var taskDidReceiveChallenge: ((URLSession, URLSessionTask, URLAuthenticationChallenge) -> Void)?
+
+    /// Closure that receives `urlSession(_:task:didSendBodyData:totalBytesSent:totalBytesExpectedToSend:)` event.
+    open var taskDidSendBodyData: ((URLSession, URLSessionTask, Int64, Int64, Int64) -> Void)?
+
+    /// Closure called on the `urlSession(_:task:needNewBodyStream:)` event.
+    open var taskNeedNewBodyStream: ((URLSession, URLSessionTask) -> Void)?
+
+    /// Closure called on the `urlSession(_:task:willPerformHTTPRedirection:newRequest:completionHandler:)` event.
+    open var taskWillPerformHTTPRedirection: ((URLSession, URLSessionTask, HTTPURLResponse, URLRequest) -> Void)?
+
+    /// Closure called on the `urlSession(_:task:didFinishCollecting:)` event.
+    open var taskDidFinishCollectingMetrics: ((URLSession, URLSessionTask, URLSessionTaskMetrics) -> Void)?
+
+    /// Closure called on the `urlSession(_:task:didCompleteWithError:)` event.
+    open var taskDidComplete: ((URLSession, URLSessionTask, Error?) -> Void)?
+
+    /// Closure called on the `urlSession(_:taskIsWaitingForConnectivity:)` event.
+    open var taskIsWaitingForConnectivity: ((URLSession, URLSessionTask) -> Void)?
+
+    /// Closure that receives the `urlSession(_:dataTask:didReceive:)` event.
+    open var dataTaskDidReceiveData: ((URLSession, URLSessionDataTask, Data) -> Void)?
+
+    /// Closure called on the `urlSession(_:dataTask:willCacheResponse:completionHandler:)` event.
+    open var dataTaskWillCacheResponse: ((URLSession, URLSessionDataTask, CachedURLResponse) -> Void)?
+
+    /// Closure called on the `urlSession(_:downloadTask:didFinishDownloadingTo:)` event.
+    open var downloadTaskDidFinishDownloadingToURL: ((URLSession, URLSessionDownloadTask, URL) -> Void)?
+
+    /// Closure called on the `urlSession(_:downloadTask:didWriteData:totalBytesWritten:totalBytesExpectedToWrite:)`
+    /// event.
+    open var downloadTaskDidWriteData: ((URLSession, URLSessionDownloadTask, Int64, Int64, Int64) -> Void)?
+
+    /// Closure called on the `urlSession(_:downloadTask:didResumeAtOffset:expectedTotalBytes:)` event.
+    open var downloadTaskDidResumeAtOffset: ((URLSession, URLSessionDownloadTask, Int64, Int64) -> Void)?
+
+    // MARK: - Request Events
+
+    /// Closure called on the `request(_:didCreateInitialURLRequest:)` event.
+    open var requestDidCreateInitialURLRequest: ((Request, URLRequest) -> Void)?
+
+    /// Closure called on the `request(_:didFailToCreateURLRequestWithError:)` event.
+    open var requestDidFailToCreateURLRequestWithError: ((Request, AFError) -> Void)?
+
+    /// Closure called on the `request(_:didAdaptInitialRequest:to:)` event.
+    open var requestDidAdaptInitialRequestToAdaptedRequest: ((Request, URLRequest, URLRequest) -> Void)?
+
+    /// Closure called on the `request(_:didFailToAdaptURLRequest:withError:)` event.
+    open var requestDidFailToAdaptURLRequestWithError: ((Request, URLRequest, AFError) -> Void)?
+
+    /// Closure called on the `request(_:didCreateURLRequest:)` event.
+    open var requestDidCreateURLRequest: ((Request, URLRequest) -> Void)?
+
+    /// Closure called on the `request(_:didCreateTask:)` event.
+    open var requestDidCreateTask: ((Request, URLSessionTask) -> Void)?
+
+    /// Closure called on the `request(_:didGatherMetrics:)` event.
+    open var requestDidGatherMetrics: ((Request, URLSessionTaskMetrics) -> Void)?
+
+    /// Closure called on the `request(_:didFailTask:earlyWithError:)` event.
+    open var requestDidFailTaskEarlyWithError: ((Request, URLSessionTask, AFError) -> Void)?
+
+    /// Closure called on the `request(_:didCompleteTask:with:)` event.
+    open var requestDidCompleteTaskWithError: ((Request, URLSessionTask, AFError?) -> Void)?
+
+    /// Closure called on the `requestIsRetrying(_:)` event.
+    open var requestIsRetrying: ((Request) -> Void)?
+
+    /// Closure called on the `requestDidFinish(_:)` event.
+    open var requestDidFinish: ((Request) -> Void)?
+
+    /// Closure called on the `requestDidResume(_:)` event.
+    open var requestDidResume: ((Request) -> Void)?
+
+    /// Closure called on the `request(_:didResumeTask:)` event.
+    open var requestDidResumeTask: ((Request, URLSessionTask) -> Void)?
+
+    /// Closure called on the `requestDidSuspend(_:)` event.
+    open var requestDidSuspend: ((Request) -> Void)?
+
+    /// Closure called on the `request(_:didSuspendTask:)` event.
+    open var requestDidSuspendTask: ((Request, URLSessionTask) -> Void)?
+
+    /// Closure called on the `requestDidCancel(_:)` event.
+    open var requestDidCancel: ((Request) -> Void)?
+
+    /// Closure called on the `request(_:didCancelTask:)` event.
+    open var requestDidCancelTask: ((Request, URLSessionTask) -> Void)?
+
+    /// Closure called on the `request(_:didValidateRequest:response:data:withResult:)` event.
+    open var requestDidValidateRequestResponseDataWithResult: ((DataRequest, URLRequest?, HTTPURLResponse, Data?, Request.ValidationResult) -> Void)?
+
+    /// Closure called on the `request(_:didParseResponse:)` event.
+    open var requestDidParseResponse: ((DataRequest, DataResponse<Data?, AFError>) -> Void)?
+
+    /// Closure called on the `request(_:didValidateRequest:response:withResult:)` event.
+    open var requestDidValidateRequestResponseWithResult: ((DataStreamRequest, URLRequest?, HTTPURLResponse, Request.ValidationResult) -> Void)?
+
+    /// Closure called on the `request(_:didCreateUploadable:)` event.
+    open var requestDidCreateUploadable: ((UploadRequest, UploadRequest.Uploadable) -> Void)?
+
+    /// Closure called on the `request(_:didFailToCreateUploadableWithError:)` event.
+    open var requestDidFailToCreateUploadableWithError: ((UploadRequest, AFError) -> Void)?
+
+    /// Closure called on the `request(_:didProvideInputStream:)` event.
+    open var requestDidProvideInputStream: ((UploadRequest, InputStream) -> Void)?
+
+    /// Closure called on the `request(_:didFinishDownloadingUsing:with:)` event.
+    open var requestDidFinishDownloadingUsingTaskWithResult: ((DownloadRequest, URLSessionTask, Result<URL, AFError>) -> Void)?
+
+    /// Closure called on the `request(_:didCreateDestinationURL:)` event.
+    open var requestDidCreateDestinationURL: ((DownloadRequest, URL) -> Void)?
+
+    /// Closure called on the `request(_:didValidateRequest:response:temporaryURL:destinationURL:withResult:)` event.
+    open var requestDidValidateRequestResponseFileURLWithResult: ((DownloadRequest, URLRequest?, HTTPURLResponse, URL?, Request.ValidationResult) -> Void)?
+
+    /// Closure called on the `request(_:didParseResponse:)` event.
+    open var requestDidParseDownloadResponse: ((DownloadRequest, DownloadResponse<URL?, AFError>) -> Void)?
+
+    public let queue: DispatchQueue
+
+    /// Creates an instance using the provided queue.
+    ///
+    /// - Parameter queue: `DispatchQueue` on which events will fired. `.main` by default.
+    public init(queue: DispatchQueue = .main) {
+        self.queue = queue
+    }
+
+    open func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?) {
+        sessionDidBecomeInvalidWithError?(session, error)
+    }
+
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didReceive challenge: URLAuthenticationChallenge) {
+        taskDidReceiveChallenge?(session, task, challenge)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         task: URLSessionTask,
+                         didSendBodyData bytesSent: Int64,
+                         totalBytesSent: Int64,
+                         totalBytesExpectedToSend: Int64) {
+        taskDidSendBodyData?(session, task, bytesSent, totalBytesSent, totalBytesExpectedToSend)
+    }
+
+    open func urlSession(_ session: URLSession, taskNeedsNewBodyStream task: URLSessionTask) {
+        taskNeedNewBodyStream?(session, task)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         task: URLSessionTask,
+                         willPerformHTTPRedirection response: HTTPURLResponse,
+                         newRequest request: URLRequest) {
+        taskWillPerformHTTPRedirection?(session, task, response, request)
+    }
+
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics) {
+        taskDidFinishCollectingMetrics?(session, task, metrics)
+    }
+
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
+        taskDidComplete?(session, task, error)
+    }
+
+    open func urlSession(_ session: URLSession, taskIsWaitingForConnectivity task: URLSessionTask) {
+        taskIsWaitingForConnectivity?(session, task)
+    }
+
+    open func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
+        dataTaskDidReceiveData?(session, dataTask, data)
+    }
+
+    open func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, willCacheResponse proposedResponse: CachedURLResponse) {
+        dataTaskWillCacheResponse?(session, dataTask, proposedResponse)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         downloadTask: URLSessionDownloadTask,
+                         didResumeAtOffset fileOffset: Int64,
+                         expectedTotalBytes: Int64) {
+        downloadTaskDidResumeAtOffset?(session, downloadTask, fileOffset, expectedTotalBytes)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         downloadTask: URLSessionDownloadTask,
+                         didWriteData bytesWritten: Int64,
+                         totalBytesWritten: Int64,
+                         totalBytesExpectedToWrite: Int64) {
+        downloadTaskDidWriteData?(session, downloadTask, bytesWritten, totalBytesWritten, totalBytesExpectedToWrite)
+    }
+
+    open func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
+        downloadTaskDidFinishDownloadingToURL?(session, downloadTask, location)
+    }
+
+    // MARK: Request Events
+
+    open func request(_ request: Request, didCreateInitialURLRequest urlRequest: URLRequest) {
+        requestDidCreateInitialURLRequest?(request, urlRequest)
+    }
+
+    open func request(_ request: Request, didFailToCreateURLRequestWithError error: AFError) {
+        requestDidFailToCreateURLRequestWithError?(request, error)
+    }
+
+    open func request(_ request: Request, didAdaptInitialRequest initialRequest: URLRequest, to adaptedRequest: URLRequest) {
+        requestDidAdaptInitialRequestToAdaptedRequest?(request, initialRequest, adaptedRequest)
+    }
+
+    open func request(_ request: Request, didFailToAdaptURLRequest initialRequest: URLRequest, withError error: AFError) {
+        requestDidFailToAdaptURLRequestWithError?(request, initialRequest, error)
+    }
+
+    open func request(_ request: Request, didCreateURLRequest urlRequest: URLRequest) {
+        requestDidCreateURLRequest?(request, urlRequest)
+    }
+
+    open func request(_ request: Request, didCreateTask task: URLSessionTask) {
+        requestDidCreateTask?(request, task)
+    }
+
+    open func request(_ request: Request, didGatherMetrics metrics: URLSessionTaskMetrics) {
+        requestDidGatherMetrics?(request, metrics)
+    }
+
+    open func request(_ request: Request, didFailTask task: URLSessionTask, earlyWithError error: AFError) {
+        requestDidFailTaskEarlyWithError?(request, task, error)
+    }
+
+    open func request(_ request: Request, didCompleteTask task: URLSessionTask, with error: AFError?) {
+        requestDidCompleteTaskWithError?(request, task, error)
+    }
+
+    open func requestIsRetrying(_ request: Request) {
+        requestIsRetrying?(request)
+    }
+
+    open func requestDidFinish(_ request: Request) {
+        requestDidFinish?(request)
+    }
+
+    open func requestDidResume(_ request: Request) {
+        requestDidResume?(request)
+    }
+
+    public func request(_ request: Request, didResumeTask task: URLSessionTask) {
+        requestDidResumeTask?(request, task)
+    }
+
+    open func requestDidSuspend(_ request: Request) {
+        requestDidSuspend?(request)
+    }
+
+    public func request(_ request: Request, didSuspendTask task: URLSessionTask) {
+        requestDidSuspendTask?(request, task)
+    }
+
+    open func requestDidCancel(_ request: Request) {
+        requestDidCancel?(request)
+    }
+
+    public func request(_ request: Request, didCancelTask task: URLSessionTask) {
+        requestDidCancelTask?(request, task)
+    }
+
+    open func request(_ request: DataRequest,
+                      didValidateRequest urlRequest: URLRequest?,
+                      response: HTTPURLResponse,
+                      data: Data?,
+                      withResult result: Request.ValidationResult) {
+        requestDidValidateRequestResponseDataWithResult?(request, urlRequest, response, data, result)
+    }
+
+    open func request(_ request: DataRequest, didParseResponse response: DataResponse<Data?, AFError>) {
+        requestDidParseResponse?(request, response)
+    }
+
+    public func request(_ request: DataStreamRequest, didValidateRequest urlRequest: URLRequest?, response: HTTPURLResponse, withResult result: Request.ValidationResult) {
+        requestDidValidateRequestResponseWithResult?(request, urlRequest, response, result)
+    }
+
+    open func request(_ request: UploadRequest, didCreateUploadable uploadable: UploadRequest.Uploadable) {
+        requestDidCreateUploadable?(request, uploadable)
+    }
+
+    open func request(_ request: UploadRequest, didFailToCreateUploadableWithError error: AFError) {
+        requestDidFailToCreateUploadableWithError?(request, error)
+    }
+
+    open func request(_ request: UploadRequest, didProvideInputStream stream: InputStream) {
+        requestDidProvideInputStream?(request, stream)
+    }
+
+    open func request(_ request: DownloadRequest, didFinishDownloadingUsing task: URLSessionTask, with result: Result<URL, AFError>) {
+        requestDidFinishDownloadingUsingTaskWithResult?(request, task, result)
+    }
+
+    open func request(_ request: DownloadRequest, didCreateDestinationURL url: URL) {
+        requestDidCreateDestinationURL?(request, url)
+    }
+
+    open func request(_ request: DownloadRequest,
+                      didValidateRequest urlRequest: URLRequest?,
+                      response: HTTPURLResponse,
+                      fileURL: URL?,
+                      withResult result: Request.ValidationResult) {
+        requestDidValidateRequestResponseFileURLWithResult?(request,
+                                                            urlRequest,
+                                                            response,
+                                                            fileURL,
+                                                            result)
+    }
+
+    open func request(_ request: DownloadRequest, didParseResponse response: DownloadResponse<URL?, AFError>) {
+        requestDidParseDownloadResponse?(request, response)
+    }
+}

Pods/Alamofire/Source/HTTPHeaders.swift

@@ -0,0 +1,449 @@
+//
+//  HTTPHeaders.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// An order-preserving and case-insensitive representation of HTTP headers.
+public struct HTTPHeaders {
+    private var headers: [HTTPHeader] = []
+
+    /// Creates an empty instance.
+    public init() {}
+
+    /// Creates an instance from an array of `HTTPHeader`s. Duplicate case-insensitive names are collapsed into the last
+    /// name and value encountered.
+    public init(_ headers: [HTTPHeader]) {
+        self.init()
+
+        headers.forEach { update($0) }
+    }
+
+    /// Creates an instance from a `[String: String]`. Duplicate case-insensitive names are collapsed into the last name
+    /// and value encountered.
+    public init(_ dictionary: [String: String]) {
+        self.init()
+
+        dictionary.forEach { update(HTTPHeader(name: $0.key, value: $0.value)) }
+    }
+
+    /// Case-insensitively updates or appends an `HTTPHeader` into the instance using the provided `name` and `value`.
+    ///
+    /// - Parameters:
+    ///   - name:  The `HTTPHeader` name.
+    ///   - value: The `HTTPHeader value.
+    public mutating func add(name: String, value: String) {
+        update(HTTPHeader(name: name, value: value))
+    }
+
+    /// Case-insensitively updates or appends the provided `HTTPHeader` into the instance.
+    ///
+    /// - Parameter header: The `HTTPHeader` to update or append.
+    public mutating func add(_ header: HTTPHeader) {
+        update(header)
+    }
+
+    /// Case-insensitively updates or appends an `HTTPHeader` into the instance using the provided `name` and `value`.
+    ///
+    /// - Parameters:
+    ///   - name:  The `HTTPHeader` name.
+    ///   - value: The `HTTPHeader value.
+    public mutating func update(name: String, value: String) {
+        update(HTTPHeader(name: name, value: value))
+    }
+
+    /// Case-insensitively updates or appends the provided `HTTPHeader` into the instance.
+    ///
+    /// - Parameter header: The `HTTPHeader` to update or append.
+    public mutating func update(_ header: HTTPHeader) {
+        guard let index = headers.index(of: header.name) else {
+            headers.append(header)
+            return
+        }
+
+        headers.replaceSubrange(index...index, with: [header])
+    }
+
+    /// Case-insensitively removes an `HTTPHeader`, if it exists, from the instance.
+    ///
+    /// - Parameter name: The name of the `HTTPHeader` to remove.
+    public mutating func remove(name: String) {
+        guard let index = headers.index(of: name) else { return }
+
+        headers.remove(at: index)
+    }
+
+    /// Sort the current instance by header name, case insensitively.
+    public mutating func sort() {
+        headers.sort { $0.name.lowercased() < $1.name.lowercased() }
+    }
+
+    /// Returns an instance sorted by header name.
+    ///
+    /// - Returns: A copy of the current instance sorted by name.
+    public func sorted() -> HTTPHeaders {
+        var headers = self
+        headers.sort()
+
+        return headers
+    }
+
+    /// Case-insensitively find a header's value by name.
+    ///
+    /// - Parameter name: The name of the header to search for, case-insensitively.
+    ///
+    /// - Returns:        The value of header, if it exists.
+    public func value(for name: String) -> String? {
+        guard let index = headers.index(of: name) else { return nil }
+
+        return headers[index].value
+    }
+
+    /// Case-insensitively access the header with the given name.
+    ///
+    /// - Parameter name: The name of the header.
+    public subscript(_ name: String) -> String? {
+        get { value(for: name) }
+        set {
+            if let value = newValue {
+                update(name: name, value: value)
+            } else {
+                remove(name: name)
+            }
+        }
+    }
+
+    /// The dictionary representation of all headers.
+    ///
+    /// This representation does not preserve the current order of the instance.
+    public var dictionary: [String: String] {
+        let namesAndValues = headers.map { ($0.name, $0.value) }
+
+        return Dictionary(namesAndValues, uniquingKeysWith: { _, last in last })
+    }
+}
+
+extension HTTPHeaders: ExpressibleByDictionaryLiteral {
+    public init(dictionaryLiteral elements: (String, String)...) {
+        self.init()
+
+        elements.forEach { update(name: $0.0, value: $0.1) }
+    }
+}
+
+extension HTTPHeaders: ExpressibleByArrayLiteral {
+    public init(arrayLiteral elements: HTTPHeader...) {
+        self.init(elements)
+    }
+}
+
+extension HTTPHeaders: Sequence {
+    public func makeIterator() -> IndexingIterator<[HTTPHeader]> {
+        headers.makeIterator()
+    }
+}
+
+extension HTTPHeaders: Collection {
+    public var startIndex: Int {
+        headers.startIndex
+    }
+
+    public var endIndex: Int {
+        headers.endIndex
+    }
+
+    public subscript(position: Int) -> HTTPHeader {
+        headers[position]
+    }
+
+    public func index(after i: Int) -> Int {
+        headers.index(after: i)
+    }
+}
+
+extension HTTPHeaders: CustomStringConvertible {
+    public var description: String {
+        headers.map { $0.description }
+            .joined(separator: "\n")
+    }
+}
+
+// MARK: - HTTPHeader
+
+/// A representation of a single HTTP header's name / value pair.
+public struct HTTPHeader: Hashable {
+    /// Name of the header.
+    public let name: String
+
+    /// Value of the header.
+    public let value: String
+
+    /// Creates an instance from the given `name` and `value`.
+    ///
+    /// - Parameters:
+    ///   - name:  The name of the header.
+    ///   - value: The value of the header.
+    public init(name: String, value: String) {
+        self.name = name
+        self.value = value
+    }
+}
+
+extension HTTPHeader: CustomStringConvertible {
+    public var description: String {
+        "\(name): \(value)"
+    }
+}
+
+extension HTTPHeader {
+    /// Returns an `Accept` header.
+    ///
+    /// - Parameter value: The `Accept` value.
+    /// - Returns:         The header.
+    public static func accept(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Accept", value: value)
+    }
+
+    /// Returns an `Accept-Charset` header.
+    ///
+    /// - Parameter value: The `Accept-Charset` value.
+    /// - Returns:         The header.
+    public static func acceptCharset(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Accept-Charset", value: value)
+    }
+
+    /// Returns an `Accept-Language` header.
+    ///
+    /// Alamofire offers a default Accept-Language header that accumulates and encodes the system's preferred languages.
+    /// Use `HTTPHeader.defaultAcceptLanguage`.
+    ///
+    /// - Parameter value: The `Accept-Language` value.
+    ///
+    /// - Returns:         The header.
+    public static func acceptLanguage(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Accept-Language", value: value)
+    }
+
+    /// Returns an `Accept-Encoding` header.
+    ///
+    /// Alamofire offers a default accept encoding value that provides the most common values. Use
+    /// `HTTPHeader.defaultAcceptEncoding`.
+    ///
+    /// - Parameter value: The `Accept-Encoding` value.
+    ///
+    /// - Returns:         The header
+    public static func acceptEncoding(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Accept-Encoding", value: value)
+    }
+
+    /// Returns a `Basic` `Authorization` header using the `username` and `password` provided.
+    ///
+    /// - Parameters:
+    ///   - username: The username of the header.
+    ///   - password: The password of the header.
+    ///
+    /// - Returns:    The header.
+    public static func authorization(username: String, password: String) -> HTTPHeader {
+        let credential = Data("\(username):\(password)".utf8).base64EncodedString()
+
+        return authorization("Basic \(credential)")
+    }
+
+    /// Returns a `Bearer` `Authorization` header using the `bearerToken` provided
+    ///
+    /// - Parameter bearerToken: The bearer token.
+    ///
+    /// - Returns:               The header.
+    public static func authorization(bearerToken: String) -> HTTPHeader {
+        authorization("Bearer \(bearerToken)")
+    }
+
+    /// Returns an `Authorization` header.
+    ///
+    /// Alamofire provides built-in methods to produce `Authorization` headers. For a Basic `Authorization` header use
+    /// `HTTPHeader.authorization(username:password:)`. For a Bearer `Authorization` header, use
+    /// `HTTPHeader.authorization(bearerToken:)`.
+    ///
+    /// - Parameter value: The `Authorization` value.
+    ///
+    /// - Returns:         The header.
+    public static func authorization(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Authorization", value: value)
+    }
+
+    /// Returns a `Content-Disposition` header.
+    ///
+    /// - Parameter value: The `Content-Disposition` value.
+    ///
+    /// - Returns:         The header.
+    public static func contentDisposition(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Content-Disposition", value: value)
+    }
+
+    /// Returns a `Content-Type` header.
+    ///
+    /// All Alamofire `ParameterEncoding`s and `ParameterEncoder`s set the `Content-Type` of the request, so it may not be necessary to manually
+    /// set this value.
+    ///
+    /// - Parameter value: The `Content-Type` value.
+    ///
+    /// - Returns:         The header.
+    public static func contentType(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "Content-Type", value: value)
+    }
+
+    /// Returns a `User-Agent` header.
+    ///
+    /// - Parameter value: The `User-Agent` value.
+    ///
+    /// - Returns:         The header.
+    public static func userAgent(_ value: String) -> HTTPHeader {
+        HTTPHeader(name: "User-Agent", value: value)
+    }
+}
+
+extension Array where Element == HTTPHeader {
+    /// Case-insensitively finds the index of an `HTTPHeader` with the provided name, if it exists.
+    func index(of name: String) -> Int? {
+        let lowercasedName = name.lowercased()
+        return firstIndex { $0.name.lowercased() == lowercasedName }
+    }
+}
+
+// MARK: - Defaults
+
+extension HTTPHeaders {
+    /// The default set of `HTTPHeaders` used by Alamofire. Includes `Accept-Encoding`, `Accept-Language`, and
+    /// `User-Agent`.
+    public static let `default`: HTTPHeaders = [.defaultAcceptEncoding,
+                                                .defaultAcceptLanguage,
+                                                .defaultUserAgent]
+}
+
+extension HTTPHeader {
+    /// Returns Alamofire's default `Accept-Encoding` header, appropriate for the encodings supported by particular OS
+    /// versions.
+    ///
+    /// See the [Accept-Encoding HTTP header documentation](https://tools.ietf.org/html/rfc7230#section-4.2.3) .
+    public static let defaultAcceptEncoding: HTTPHeader = {
+        let encodings: [String]
+        if #available(iOS 11.0, macOS 10.13, tvOS 11.0, watchOS 4.0, *) {
+            encodings = ["br", "gzip", "deflate"]
+        } else {
+            encodings = ["gzip", "deflate"]
+        }
+
+        return .acceptEncoding(encodings.qualityEncoded())
+    }()
+
+    /// Returns Alamofire's default `Accept-Language` header, generated by querying `Locale` for the user's
+    /// `preferredLanguages`.
+    ///
+    /// See the [Accept-Language HTTP header documentation](https://tools.ietf.org/html/rfc7231#section-5.3.5).
+    public static let defaultAcceptLanguage: HTTPHeader = {
+        .acceptLanguage(Locale.preferredLanguages.prefix(6).qualityEncoded())
+    }()
+
+    /// Returns Alamofire's default `User-Agent` header.
+    ///
+    /// See the [User-Agent header documentation](https://tools.ietf.org/html/rfc7231#section-5.5.3).
+    ///
+    /// Example: `iOS Example/1.0 (org.alamofire.iOS-Example; build:1; iOS 13.0.0) Alamofire/5.0.0`
+    public static let defaultUserAgent: HTTPHeader = {
+        let info = Bundle.main.infoDictionary
+        let executable = (info?[kCFBundleExecutableKey as String] as? String) ??
+            (ProcessInfo.processInfo.arguments.first?.split(separator: "/").last.map(String.init)) ??
+            "Unknown"
+        let bundle = info?[kCFBundleIdentifierKey as String] as? String ?? "Unknown"
+        let appVersion = info?["CFBundleShortVersionString"] as? String ?? "Unknown"
+        let appBuild = info?[kCFBundleVersionKey as String] as? String ?? "Unknown"
+
+        let osNameVersion: String = {
+            let version = ProcessInfo.processInfo.operatingSystemVersion
+            let versionString = "\(version.majorVersion).\(version.minorVersion).\(version.patchVersion)"
+            let osName: String = {
+                #if os(iOS)
+                #if targetEnvironment(macCatalyst)
+                return "macOS(Catalyst)"
+                #else
+                return "iOS"
+                #endif
+                #elseif os(watchOS)
+                return "watchOS"
+                #elseif os(tvOS)
+                return "tvOS"
+                #elseif os(macOS)
+                return "macOS"
+                #elseif os(Linux)
+                return "Linux"
+                #elseif os(Windows)
+                return "Windows"
+                #else
+                return "Unknown"
+                #endif
+            }()
+
+            return "\(osName) \(versionString)"
+        }()
+
+        let alamofireVersion = "Alamofire/\(version)"
+
+        let userAgent = "\(executable)/\(appVersion) (\(bundle); build:\(appBuild); \(osNameVersion)) \(alamofireVersion)"
+
+        return .userAgent(userAgent)
+    }()
+}
+
+extension Collection where Element == String {
+    func qualityEncoded() -> String {
+        enumerated().map { index, encoding in
+            let quality = 1.0 - (Double(index) * 0.1)
+            return "\(encoding);q=\(quality)"
+        }.joined(separator: ", ")
+    }
+}
+
+// MARK: - System Type Extensions
+
+extension URLRequest {
+    /// Returns `allHTTPHeaderFields` as `HTTPHeaders`.
+    public var headers: HTTPHeaders {
+        get { allHTTPHeaderFields.map(HTTPHeaders.init) ?? HTTPHeaders() }
+        set { allHTTPHeaderFields = newValue.dictionary }
+    }
+}
+
+extension HTTPURLResponse {
+    /// Returns `allHeaderFields` as `HTTPHeaders`.
+    public var headers: HTTPHeaders {
+        (allHeaderFields as? [String: String]).map(HTTPHeaders.init) ?? HTTPHeaders()
+    }
+}
+
+extension URLSessionConfiguration {
+    /// Returns `httpAdditionalHeaders` as `HTTPHeaders`.
+    public var headers: HTTPHeaders {
+        get { (httpAdditionalHeaders as? [String: String]).map(HTTPHeaders.init) ?? HTTPHeaders() }
+        set { httpAdditionalHeaders = newValue.dictionary }
+    }
+}

Pods/Alamofire/Source/HTTPMethod.swift

@@ -0,0 +1,54 @@
+//
+//  HTTPMethod.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+/// Type representing HTTP methods. Raw `String` value is stored and compared case-sensitively, so
+/// `HTTPMethod.get != HTTPMethod(rawValue: "get")`.
+///
+/// See https://tools.ietf.org/html/rfc7231#section-4.3
+public struct HTTPMethod: RawRepresentable, Equatable, Hashable {
+    /// `CONNECT` method.
+    public static let connect = HTTPMethod(rawValue: "CONNECT")
+    /// `DELETE` method.
+    public static let delete = HTTPMethod(rawValue: "DELETE")
+    /// `GET` method.
+    public static let get = HTTPMethod(rawValue: "GET")
+    /// `HEAD` method.
+    public static let head = HTTPMethod(rawValue: "HEAD")
+    /// `OPTIONS` method.
+    public static let options = HTTPMethod(rawValue: "OPTIONS")
+    /// `PATCH` method.
+    public static let patch = HTTPMethod(rawValue: "PATCH")
+    /// `POST` method.
+    public static let post = HTTPMethod(rawValue: "POST")
+    /// `PUT` method.
+    public static let put = HTTPMethod(rawValue: "PUT")
+    /// `TRACE` method.
+    public static let trace = HTTPMethod(rawValue: "TRACE")
+
+    public let rawValue: String
+
+    public init(rawValue: String) {
+        self.rawValue = rawValue
+    }
+}

Pods/Alamofire/Source/MultipartFormData.swift

@@ -0,0 +1,553 @@
+//
+//  MultipartFormData.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+#if os(iOS) || os(watchOS) || os(tvOS)
+import MobileCoreServices
+#elseif os(macOS)
+import CoreServices
+#endif
+
+/// Constructs `multipart/form-data` for uploads within an HTTP or HTTPS body. There are currently two ways to encode
+/// multipart form data. The first way is to encode the data directly in memory. This is very efficient, but can lead
+/// to memory issues if the dataset is too large. The second way is designed for larger datasets and will write all the
+/// data to a single file on disk with all the proper boundary segmentation. The second approach MUST be used for
+/// larger datasets such as video content, otherwise your app may run out of memory when trying to encode the dataset.
+///
+/// For more information on `multipart/form-data` in general, please refer to the RFC-2388 and RFC-2045 specs as well
+/// and the w3 form documentation.
+///
+/// - https://www.ietf.org/rfc/rfc2388.txt
+/// - https://www.ietf.org/rfc/rfc2045.txt
+/// - https://www.w3.org/TR/html401/interact/forms.html#h-17.13
+open class MultipartFormData {
+    // MARK: - Helper Types
+
+    enum EncodingCharacters {
+        static let crlf = "\r\n"
+    }
+
+    enum BoundaryGenerator {
+        enum BoundaryType {
+            case initial, encapsulated, final
+        }
+
+        static func randomBoundary() -> String {
+            let first = UInt32.random(in: UInt32.min...UInt32.max)
+            let second = UInt32.random(in: UInt32.min...UInt32.max)
+
+            return String(format: "alamofire.boundary.%08x%08x", first, second)
+        }
+
+        static func boundaryData(forBoundaryType boundaryType: BoundaryType, boundary: String) -> Data {
+            let boundaryText: String
+
+            switch boundaryType {
+            case .initial:
+                boundaryText = "--\(boundary)\(EncodingCharacters.crlf)"
+            case .encapsulated:
+                boundaryText = "\(EncodingCharacters.crlf)--\(boundary)\(EncodingCharacters.crlf)"
+            case .final:
+                boundaryText = "\(EncodingCharacters.crlf)--\(boundary)--\(EncodingCharacters.crlf)"
+            }
+
+            return Data(boundaryText.utf8)
+        }
+    }
+
+    class BodyPart {
+        let headers: HTTPHeaders
+        let bodyStream: InputStream
+        let bodyContentLength: UInt64
+        var hasInitialBoundary = false
+        var hasFinalBoundary = false
+
+        init(headers: HTTPHeaders, bodyStream: InputStream, bodyContentLength: UInt64) {
+            self.headers = headers
+            self.bodyStream = bodyStream
+            self.bodyContentLength = bodyContentLength
+        }
+    }
+
+    // MARK: - Properties
+
+    /// Default memory threshold used when encoding `MultipartFormData`, in bytes.
+    public static let encodingMemoryThreshold: UInt64 = 10_000_000
+
+    /// The `Content-Type` header value containing the boundary used to generate the `multipart/form-data`.
+    open lazy var contentType: String = "multipart/form-data; boundary=\(self.boundary)"
+
+    /// The content length of all body parts used to generate the `multipart/form-data` not including the boundaries.
+    public var contentLength: UInt64 { bodyParts.reduce(0) { $0 + $1.bodyContentLength } }
+
+    /// The boundary used to separate the body parts in the encoded form data.
+    public let boundary: String
+
+    let fileManager: FileManager
+
+    private var bodyParts: [BodyPart]
+    private var bodyPartError: AFError?
+    private let streamBufferSize: Int
+
+    // MARK: - Lifecycle
+
+    /// Creates an instance.
+    ///
+    /// - Parameters:
+    ///   - fileManager: `FileManager` to use for file operations, if needed.
+    ///   - boundary: Boundary `String` used to separate body parts.
+    public init(fileManager: FileManager = .default, boundary: String? = nil) {
+        self.fileManager = fileManager
+        self.boundary = boundary ?? BoundaryGenerator.randomBoundary()
+        bodyParts = []
+
+        //
+        // The optimal read/write buffer size in bytes for input and output streams is 1024 (1KB). For more
+        // information, please refer to the following article:
+        //   - https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Streams/Articles/ReadingInputStreams.html
+        //
+        streamBufferSize = 1024
+    }
+
+    // MARK: - Body Parts
+
+    /// Creates a body part from the data and appends it to the instance.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}; filename=#{filename}` (HTTP Header)
+    /// - `Content-Type: #{mimeType}` (HTTP Header)
+    /// - Encoded file data
+    /// - Multipart form boundary
+    ///
+    /// - Parameters:
+    ///   - data:     `Data` to encoding into the instance.
+    ///   - name:     Name to associate with the `Data` in the `Content-Disposition` HTTP header.
+    ///   - fileName: Filename to associate with the `Data` in the `Content-Disposition` HTTP header.
+    ///   - mimeType: MIME type to associate with the data in the `Content-Type` HTTP header.
+    public func append(_ data: Data, withName name: String, fileName: String? = nil, mimeType: String? = nil) {
+        let headers = contentHeaders(withName: name, fileName: fileName, mimeType: mimeType)
+        let stream = InputStream(data: data)
+        let length = UInt64(data.count)
+
+        append(stream, withLength: length, headers: headers)
+    }
+
+    /// Creates a body part from the file and appends it to the instance.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}; filename=#{generated filename}` (HTTP Header)
+    /// - `Content-Type: #{generated mimeType}` (HTTP Header)
+    /// - Encoded file data
+    /// - Multipart form boundary
+    ///
+    /// The filename in the `Content-Disposition` HTTP header is generated from the last path component of the
+    /// `fileURL`. The `Content-Type` HTTP header MIME type is generated by mapping the `fileURL` extension to the
+    /// system associated MIME type.
+    ///
+    /// - Parameters:
+    ///   - fileURL: `URL` of the file whose content will be encoded into the instance.
+    ///   - name:    Name to associate with the file content in the `Content-Disposition` HTTP header.
+    public func append(_ fileURL: URL, withName name: String) {
+        let fileName = fileURL.lastPathComponent
+        let pathExtension = fileURL.pathExtension
+
+        if !fileName.isEmpty && !pathExtension.isEmpty {
+            let mime = mimeType(forPathExtension: pathExtension)
+            append(fileURL, withName: name, fileName: fileName, mimeType: mime)
+        } else {
+            setBodyPartError(withReason: .bodyPartFilenameInvalid(in: fileURL))
+        }
+    }
+
+    /// Creates a body part from the file and appends it to the instance.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - Content-Disposition: form-data; name=#{name}; filename=#{filename} (HTTP Header)
+    /// - Content-Type: #{mimeType} (HTTP Header)
+    /// - Encoded file data
+    /// - Multipart form boundary
+    ///
+    /// - Parameters:
+    ///   - fileURL:  `URL` of the file whose content will be encoded into the instance.
+    ///   - name:     Name to associate with the file content in the `Content-Disposition` HTTP header.
+    ///   - fileName: Filename to associate with the file content in the `Content-Disposition` HTTP header.
+    ///   - mimeType: MIME type to associate with the file content in the `Content-Type` HTTP header.
+    public func append(_ fileURL: URL, withName name: String, fileName: String, mimeType: String) {
+        let headers = contentHeaders(withName: name, fileName: fileName, mimeType: mimeType)
+
+        //============================================================
+        //                 Check 1 - is file URL?
+        //============================================================
+
+        guard fileURL.isFileURL else {
+            setBodyPartError(withReason: .bodyPartURLInvalid(url: fileURL))
+            return
+        }
+
+        //============================================================
+        //              Check 2 - is file URL reachable?
+        //============================================================
+
+        do {
+            let isReachable = try fileURL.checkPromisedItemIsReachable()
+            guard isReachable else {
+                setBodyPartError(withReason: .bodyPartFileNotReachable(at: fileURL))
+                return
+            }
+        } catch {
+            setBodyPartError(withReason: .bodyPartFileNotReachableWithError(atURL: fileURL, error: error))
+            return
+        }
+
+        //============================================================
+        //            Check 3 - is file URL a directory?
+        //============================================================
+
+        var isDirectory: ObjCBool = false
+        let path = fileURL.path
+
+        guard fileManager.fileExists(atPath: path, isDirectory: &isDirectory) && !isDirectory.boolValue else {
+            setBodyPartError(withReason: .bodyPartFileIsDirectory(at: fileURL))
+            return
+        }
+
+        //============================================================
+        //          Check 4 - can the file size be extracted?
+        //============================================================
+
+        let bodyContentLength: UInt64
+
+        do {
+            guard let fileSize = try fileManager.attributesOfItem(atPath: path)[.size] as? NSNumber else {
+                setBodyPartError(withReason: .bodyPartFileSizeNotAvailable(at: fileURL))
+                return
+            }
+
+            bodyContentLength = fileSize.uint64Value
+        } catch {
+            setBodyPartError(withReason: .bodyPartFileSizeQueryFailedWithError(forURL: fileURL, error: error))
+            return
+        }
+
+        //============================================================
+        //       Check 5 - can a stream be created from file URL?
+        //============================================================
+
+        guard let stream = InputStream(url: fileURL) else {
+            setBodyPartError(withReason: .bodyPartInputStreamCreationFailed(for: fileURL))
+            return
+        }
+
+        append(stream, withLength: bodyContentLength, headers: headers)
+    }
+
+    /// Creates a body part from the stream and appends it to the instance.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - `Content-Disposition: form-data; name=#{name}; filename=#{filename}` (HTTP Header)
+    /// - `Content-Type: #{mimeType}` (HTTP Header)
+    /// - Encoded stream data
+    /// - Multipart form boundary
+    ///
+    /// - Parameters:
+    ///   - stream:   `InputStream` to encode into the instance.
+    ///   - length:   Length, in bytes, of the stream.
+    ///   - name:     Name to associate with the stream content in the `Content-Disposition` HTTP header.
+    ///   - fileName: Filename to associate with the stream content in the `Content-Disposition` HTTP header.
+    ///   - mimeType: MIME type to associate with the stream content in the `Content-Type` HTTP header.
+    public func append(_ stream: InputStream,
+                       withLength length: UInt64,
+                       name: String,
+                       fileName: String,
+                       mimeType: String) {
+        let headers = contentHeaders(withName: name, fileName: fileName, mimeType: mimeType)
+        append(stream, withLength: length, headers: headers)
+    }
+
+    /// Creates a body part with the stream, length, and headers and appends it to the instance.
+    ///
+    /// The body part data will be encoded using the following format:
+    ///
+    /// - HTTP headers
+    /// - Encoded stream data
+    /// - Multipart form boundary
+    ///
+    /// - Parameters:
+    ///   - stream:  `InputStream` to encode into the instance.
+    ///   - length:  Length, in bytes, of the stream.
+    ///   - headers: `HTTPHeaders` for the body part.
+    public func append(_ stream: InputStream, withLength length: UInt64, headers: HTTPHeaders) {
+        let bodyPart = BodyPart(headers: headers, bodyStream: stream, bodyContentLength: length)
+        bodyParts.append(bodyPart)
+    }
+
+    // MARK: - Data Encoding
+
+    /// Encodes all appended body parts into a single `Data` value.
+    ///
+    /// - Note: This method will load all the appended body parts into memory all at the same time. This method should
+    ///         only be used when the encoded data will have a small memory footprint. For large data cases, please use
+    ///         the `writeEncodedData(to:))` method.
+    ///
+    /// - Returns: The encoded `Data`, if encoding is successful.
+    /// - Throws:  An `AFError` if encoding encounters an error.
+    public func encode() throws -> Data {
+        if let bodyPartError = bodyPartError {
+            throw bodyPartError
+        }
+
+        var encoded = Data()
+
+        bodyParts.first?.hasInitialBoundary = true
+        bodyParts.last?.hasFinalBoundary = true
+
+        for bodyPart in bodyParts {
+            let encodedData = try encode(bodyPart)
+            encoded.append(encodedData)
+        }
+
+        return encoded
+    }
+
+    /// Writes all appended body parts to the given file `URL`.
+    ///
+    /// This process is facilitated by reading and writing with input and output streams, respectively. Thus,
+    /// this approach is very memory efficient and should be used for large body part data.
+    ///
+    /// - Parameter fileURL: File `URL` to which to write the form data.
+    /// - Throws:            An `AFError` if encoding encounters an error.
+    public func writeEncodedData(to fileURL: URL) throws {
+        if let bodyPartError = bodyPartError {
+            throw bodyPartError
+        }
+
+        if fileManager.fileExists(atPath: fileURL.path) {
+            throw AFError.multipartEncodingFailed(reason: .outputStreamFileAlreadyExists(at: fileURL))
+        } else if !fileURL.isFileURL {
+            throw AFError.multipartEncodingFailed(reason: .outputStreamURLInvalid(url: fileURL))
+        }
+
+        guard let outputStream = OutputStream(url: fileURL, append: false) else {
+            throw AFError.multipartEncodingFailed(reason: .outputStreamCreationFailed(for: fileURL))
+        }
+
+        outputStream.open()
+        defer { outputStream.close() }
+
+        bodyParts.first?.hasInitialBoundary = true
+        bodyParts.last?.hasFinalBoundary = true
+
+        for bodyPart in bodyParts {
+            try write(bodyPart, to: outputStream)
+        }
+    }
+
+    // MARK: - Private - Body Part Encoding
+
+    private func encode(_ bodyPart: BodyPart) throws -> Data {
+        var encoded = Data()
+
+        let initialData = bodyPart.hasInitialBoundary ? initialBoundaryData() : encapsulatedBoundaryData()
+        encoded.append(initialData)
+
+        let headerData = encodeHeaders(for: bodyPart)
+        encoded.append(headerData)
+
+        let bodyStreamData = try encodeBodyStream(for: bodyPart)
+        encoded.append(bodyStreamData)
+
+        if bodyPart.hasFinalBoundary {
+            encoded.append(finalBoundaryData())
+        }
+
+        return encoded
+    }
+
+    private func encodeHeaders(for bodyPart: BodyPart) -> Data {
+        let headerText = bodyPart.headers.map { "\($0.name): \($0.value)\(EncodingCharacters.crlf)" }
+            .joined()
+            + EncodingCharacters.crlf
+
+        return Data(headerText.utf8)
+    }
+
+    private func encodeBodyStream(for bodyPart: BodyPart) throws -> Data {
+        let inputStream = bodyPart.bodyStream
+        inputStream.open()
+        defer { inputStream.close() }
+
+        var encoded = Data()
+
+        while inputStream.hasBytesAvailable {
+            var buffer = [UInt8](repeating: 0, count: streamBufferSize)
+            let bytesRead = inputStream.read(&buffer, maxLength: streamBufferSize)
+
+            if let error = inputStream.streamError {
+                throw AFError.multipartEncodingFailed(reason: .inputStreamReadFailed(error: error))
+            }
+
+            if bytesRead > 0 {
+                encoded.append(buffer, count: bytesRead)
+            } else {
+                break
+            }
+        }
+
+        guard UInt64(encoded.count) == bodyPart.bodyContentLength else {
+            let error = AFError.UnexpectedInputStreamLength(bytesExpected: bodyPart.bodyContentLength,
+                                                            bytesRead: UInt64(encoded.count))
+            throw AFError.multipartEncodingFailed(reason: .inputStreamReadFailed(error: error))
+        }
+
+        return encoded
+    }
+
+    // MARK: - Private - Writing Body Part to Output Stream
+
+    private func write(_ bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        try writeInitialBoundaryData(for: bodyPart, to: outputStream)
+        try writeHeaderData(for: bodyPart, to: outputStream)
+        try writeBodyStream(for: bodyPart, to: outputStream)
+        try writeFinalBoundaryData(for: bodyPart, to: outputStream)
+    }
+
+    private func writeInitialBoundaryData(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        let initialData = bodyPart.hasInitialBoundary ? initialBoundaryData() : encapsulatedBoundaryData()
+        return try write(initialData, to: outputStream)
+    }
+
+    private func writeHeaderData(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        let headerData = encodeHeaders(for: bodyPart)
+        return try write(headerData, to: outputStream)
+    }
+
+    private func writeBodyStream(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        let inputStream = bodyPart.bodyStream
+
+        inputStream.open()
+        defer { inputStream.close() }
+
+        while inputStream.hasBytesAvailable {
+            var buffer = [UInt8](repeating: 0, count: streamBufferSize)
+            let bytesRead = inputStream.read(&buffer, maxLength: streamBufferSize)
+
+            if let streamError = inputStream.streamError {
+                throw AFError.multipartEncodingFailed(reason: .inputStreamReadFailed(error: streamError))
+            }
+
+            if bytesRead > 0 {
+                if buffer.count != bytesRead {
+                    buffer = Array(buffer[0..<bytesRead])
+                }
+
+                try write(&buffer, to: outputStream)
+            } else {
+                break
+            }
+        }
+    }
+
+    private func writeFinalBoundaryData(for bodyPart: BodyPart, to outputStream: OutputStream) throws {
+        if bodyPart.hasFinalBoundary {
+            return try write(finalBoundaryData(), to: outputStream)
+        }
+    }
+
+    // MARK: - Private - Writing Buffered Data to Output Stream
+
+    private func write(_ data: Data, to outputStream: OutputStream) throws {
+        var buffer = [UInt8](repeating: 0, count: data.count)
+        data.copyBytes(to: &buffer, count: data.count)
+
+        return try write(&buffer, to: outputStream)
+    }
+
+    private func write(_ buffer: inout [UInt8], to outputStream: OutputStream) throws {
+        var bytesToWrite = buffer.count
+
+        while bytesToWrite > 0, outputStream.hasSpaceAvailable {
+            let bytesWritten = outputStream.write(buffer, maxLength: bytesToWrite)
+
+            if let error = outputStream.streamError {
+                throw AFError.multipartEncodingFailed(reason: .outputStreamWriteFailed(error: error))
+            }
+
+            bytesToWrite -= bytesWritten
+
+            if bytesToWrite > 0 {
+                buffer = Array(buffer[bytesWritten..<buffer.count])
+            }
+        }
+    }
+
+    // MARK: - Private - Mime Type
+
+    private func mimeType(forPathExtension pathExtension: String) -> String {
+        if
+            let id = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension as CFString, nil)?.takeRetainedValue(),
+            let contentType = UTTypeCopyPreferredTagWithClass(id, kUTTagClassMIMEType)?.takeRetainedValue() {
+            return contentType as String
+        }
+
+        return "application/octet-stream"
+    }
+
+    // MARK: - Private - Content Headers
+
+    private func contentHeaders(withName name: String, fileName: String? = nil, mimeType: String? = nil) -> HTTPHeaders {
+        var disposition = "form-data; name=\"\(name)\""
+        if let fileName = fileName { disposition += "; filename=\"\(fileName)\"" }
+
+        var headers: HTTPHeaders = [.contentDisposition(disposition)]
+        if let mimeType = mimeType { headers.add(.contentType(mimeType)) }
+
+        return headers
+    }
+
+    // MARK: - Private - Boundary Encoding
+
+    private func initialBoundaryData() -> Data {
+        BoundaryGenerator.boundaryData(forBoundaryType: .initial, boundary: boundary)
+    }
+
+    private func encapsulatedBoundaryData() -> Data {
+        BoundaryGenerator.boundaryData(forBoundaryType: .encapsulated, boundary: boundary)
+    }
+
+    private func finalBoundaryData() -> Data {
+        BoundaryGenerator.boundaryData(forBoundaryType: .final, boundary: boundary)
+    }
+
+    // MARK: - Private - Errors
+
+    private func setBodyPartError(withReason reason: AFError.MultipartEncodingFailureReason) {
+        guard bodyPartError == nil else { return }
+        bodyPartError = AFError.multipartEncodingFailed(reason: reason)
+    }
+}

Pods/Alamofire/Source/MultipartUpload.swift

@@ -0,0 +1,89 @@
+//
+//  MultipartUpload.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Internal type which encapsulates a `MultipartFormData` upload.
+final class MultipartUpload {
+    lazy var result = Result { try build() }
+
+    @Protected
+    private(set) var multipartFormData: MultipartFormData
+    let encodingMemoryThreshold: UInt64
+    let request: URLRequestConvertible
+    let fileManager: FileManager
+
+    init(encodingMemoryThreshold: UInt64,
+         request: URLRequestConvertible,
+         multipartFormData: MultipartFormData) {
+        self.encodingMemoryThreshold = encodingMemoryThreshold
+        self.request = request
+        fileManager = multipartFormData.fileManager
+        self.multipartFormData = multipartFormData
+    }
+
+    func build() throws -> UploadRequest.Uploadable {
+        let uploadable: UploadRequest.Uploadable
+        if multipartFormData.contentLength < encodingMemoryThreshold {
+            let data = try multipartFormData.encode()
+
+            uploadable = .data(data)
+        } else {
+            let tempDirectoryURL = fileManager.temporaryDirectory
+            let directoryURL = tempDirectoryURL.appendingPathComponent("org.alamofire.manager/multipart.form.data")
+            let fileName = UUID().uuidString
+            let fileURL = directoryURL.appendingPathComponent(fileName)
+
+            try fileManager.createDirectory(at: directoryURL, withIntermediateDirectories: true, attributes: nil)
+
+            do {
+                try multipartFormData.writeEncodedData(to: fileURL)
+            } catch {
+                // Cleanup after attempted write if it fails.
+                try? fileManager.removeItem(at: fileURL)
+                throw error
+            }
+
+            uploadable = .file(fileURL, shouldRemove: true)
+        }
+
+        return uploadable
+    }
+}
+
+extension MultipartUpload: UploadConvertible {
+    func asURLRequest() throws -> URLRequest {
+        var urlRequest = try request.asURLRequest()
+
+        $multipartFormData.read { multipartFormData in
+            urlRequest.headers.add(.contentType(multipartFormData.contentType))
+        }
+
+        return urlRequest
+    }
+
+    func createUploadable() throws -> UploadRequest.Uploadable {
+        try result.get()
+    }
+}

Pods/Alamofire/Source/NetworkReachabilityManager.swift

@@ -0,0 +1,267 @@
+//
+//  NetworkReachabilityManager.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#if !(os(watchOS) || os(Linux))
+
+import Foundation
+import SystemConfiguration
+
+/// The `NetworkReachabilityManager` class listens for reachability changes of hosts and addresses for both cellular and
+/// WiFi network interfaces.
+///
+/// Reachability can be used to determine background information about why a network operation failed, or to retry
+/// network requests when a connection is established. It should not be used to prevent a user from initiating a network
+/// request, as it's possible that an initial request may be required to establish reachability.
+open class NetworkReachabilityManager {
+    /// Defines the various states of network reachability.
+    public enum NetworkReachabilityStatus {
+        /// It is unknown whether the network is reachable.
+        case unknown
+        /// The network is not reachable.
+        case notReachable
+        /// The network is reachable on the associated `ConnectionType`.
+        case reachable(ConnectionType)
+
+        init(_ flags: SCNetworkReachabilityFlags) {
+            guard flags.isActuallyReachable else { self = .notReachable; return }
+
+            var networkStatus: NetworkReachabilityStatus = .reachable(.ethernetOrWiFi)
+
+            if flags.isCellular { networkStatus = .reachable(.cellular) }
+
+            self = networkStatus
+        }
+
+        /// Defines the various connection types detected by reachability flags.
+        public enum ConnectionType {
+            /// The connection type is either over Ethernet or WiFi.
+            case ethernetOrWiFi
+            /// The connection type is a cellular connection.
+            case cellular
+        }
+    }
+
+    /// A closure executed when the network reachability status changes. The closure takes a single argument: the
+    /// network reachability status.
+    public typealias Listener = (NetworkReachabilityStatus) -> Void
+
+    /// Default `NetworkReachabilityManager` for the zero address and a `listenerQueue` of `.main`.
+    public static let `default` = NetworkReachabilityManager()
+
+    // MARK: - Properties
+
+    /// Whether the network is currently reachable.
+    open var isReachable: Bool { isReachableOnCellular || isReachableOnEthernetOrWiFi }
+
+    /// Whether the network is currently reachable over the cellular interface.
+    ///
+    /// - Note: Using this property to decide whether to make a high or low bandwidth request is not recommended.
+    ///         Instead, set the `allowsCellularAccess` on any `URLRequest`s being issued.
+    ///
+    open var isReachableOnCellular: Bool { status == .reachable(.cellular) }
+
+    /// Whether the network is currently reachable over Ethernet or WiFi interface.
+    open var isReachableOnEthernetOrWiFi: Bool { status == .reachable(.ethernetOrWiFi) }
+
+    /// `DispatchQueue` on which reachability will update.
+    public let reachabilityQueue = DispatchQueue(label: "org.alamofire.reachabilityQueue")
+
+    /// Flags of the current reachability type, if any.
+    open var flags: SCNetworkReachabilityFlags? {
+        var flags = SCNetworkReachabilityFlags()
+
+        return (SCNetworkReachabilityGetFlags(reachability, &flags)) ? flags : nil
+    }
+
+    /// The current network reachability status.
+    open var status: NetworkReachabilityStatus {
+        flags.map(NetworkReachabilityStatus.init) ?? .unknown
+    }
+
+    /// Mutable state storage.
+    struct MutableState {
+        /// A closure executed when the network reachability status changes.
+        var listener: Listener?
+        /// `DispatchQueue` on which listeners will be called.
+        var listenerQueue: DispatchQueue?
+        /// Previously calculated status.
+        var previousStatus: NetworkReachabilityStatus?
+    }
+
+    /// `SCNetworkReachability` instance providing notifications.
+    private let reachability: SCNetworkReachability
+
+    /// Protected storage for mutable state.
+    @Protected
+    private var mutableState = MutableState()
+
+    // MARK: - Initialization
+
+    /// Creates an instance with the specified host.
+    ///
+    /// - Note: The `host` value must *not* contain a scheme, just the hostname.
+    ///
+    /// - Parameters:
+    ///   - host:          Host used to evaluate network reachability. Must *not* include the scheme (e.g. `https`).
+    public convenience init?(host: String) {
+        guard let reachability = SCNetworkReachabilityCreateWithName(nil, host) else { return nil }
+
+        self.init(reachability: reachability)
+    }
+
+    /// Creates an instance that monitors the address 0.0.0.0.
+    ///
+    /// Reachability treats the 0.0.0.0 address as a special token that causes it to monitor the general routing
+    /// status of the device, both IPv4 and IPv6.
+    public convenience init?() {
+        var zero = sockaddr()
+        zero.sa_len = UInt8(MemoryLayout<sockaddr>.size)
+        zero.sa_family = sa_family_t(AF_INET)
+
+        guard let reachability = SCNetworkReachabilityCreateWithAddress(nil, &zero) else { return nil }
+
+        self.init(reachability: reachability)
+    }
+
+    private init(reachability: SCNetworkReachability) {
+        self.reachability = reachability
+    }
+
+    deinit {
+        stopListening()
+    }
+
+    // MARK: - Listening
+
+    /// Starts listening for changes in network reachability status.
+    ///
+    /// - Note: Stops and removes any existing listener.
+    ///
+    /// - Parameters:
+    ///   - queue:    `DispatchQueue` on which to call the `listener` closure. `.main` by default.
+    ///   - listener: `Listener` closure called when reachability changes.
+    ///
+    /// - Returns: `true` if listening was started successfully, `false` otherwise.
+    @discardableResult
+    open func startListening(onQueue queue: DispatchQueue = .main,
+                             onUpdatePerforming listener: @escaping Listener) -> Bool {
+        stopListening()
+
+        $mutableState.write { state in
+            state.listenerQueue = queue
+            state.listener = listener
+        }
+
+        var context = SCNetworkReachabilityContext(version: 0,
+                                                   info: Unmanaged.passUnretained(self).toOpaque(),
+                                                   retain: nil,
+                                                   release: nil,
+                                                   copyDescription: nil)
+        let callback: SCNetworkReachabilityCallBack = { _, flags, info in
+            guard let info = info else { return }
+
+            let instance = Unmanaged<NetworkReachabilityManager>.fromOpaque(info).takeUnretainedValue()
+            instance.notifyListener(flags)
+        }
+
+        let queueAdded = SCNetworkReachabilitySetDispatchQueue(reachability, reachabilityQueue)
+        let callbackAdded = SCNetworkReachabilitySetCallback(reachability, callback, &context)
+
+        // Manually call listener to give initial state, since the framework may not.
+        if let currentFlags = flags {
+            reachabilityQueue.async {
+                self.notifyListener(currentFlags)
+            }
+        }
+
+        return callbackAdded && queueAdded
+    }
+
+    /// Stops listening for changes in network reachability status.
+    open func stopListening() {
+        SCNetworkReachabilitySetCallback(reachability, nil, nil)
+        SCNetworkReachabilitySetDispatchQueue(reachability, nil)
+        $mutableState.write { state in
+            state.listener = nil
+            state.listenerQueue = nil
+            state.previousStatus = nil
+        }
+    }
+
+    // MARK: - Internal - Listener Notification
+
+    /// Calls the `listener` closure of the `listenerQueue` if the computed status hasn't changed.
+    ///
+    /// - Note: Should only be called from the `reachabilityQueue`.
+    ///
+    /// - Parameter flags: `SCNetworkReachabilityFlags` to use to calculate the status.
+    func notifyListener(_ flags: SCNetworkReachabilityFlags) {
+        let newStatus = NetworkReachabilityStatus(flags)
+
+        $mutableState.write { state in
+            guard state.previousStatus != newStatus else { return }
+
+            state.previousStatus = newStatus
+
+            let listener = state.listener
+            state.listenerQueue?.async { listener?(newStatus) }
+        }
+    }
+}
+
+// MARK: -
+
+extension NetworkReachabilityManager.NetworkReachabilityStatus: Equatable {}
+
+extension SCNetworkReachabilityFlags {
+    var isReachable: Bool { contains(.reachable) }
+    var isConnectionRequired: Bool { contains(.connectionRequired) }
+    var canConnectAutomatically: Bool { contains(.connectionOnDemand) || contains(.connectionOnTraffic) }
+    var canConnectWithoutUserInteraction: Bool { canConnectAutomatically && !contains(.interventionRequired) }
+    var isActuallyReachable: Bool { isReachable && (!isConnectionRequired || canConnectWithoutUserInteraction) }
+    var isCellular: Bool {
+        #if os(iOS) || os(tvOS)
+        return contains(.isWWAN)
+        #else
+        return false
+        #endif
+    }
+
+    /// Human readable `String` for all states, to help with debugging.
+    var readableDescription: String {
+        let W = isCellular ? "W" : "-"
+        let R = isReachable ? "R" : "-"
+        let c = isConnectionRequired ? "c" : "-"
+        let t = contains(.transientConnection) ? "t" : "-"
+        let i = contains(.interventionRequired) ? "i" : "-"
+        let C = contains(.connectionOnTraffic) ? "C" : "-"
+        let D = contains(.connectionOnDemand) ? "D" : "-"
+        let l = contains(.isLocalAddress) ? "l" : "-"
+        let d = contains(.isDirect) ? "d" : "-"
+        let a = contains(.connectionAutomatic) ? "a" : "-"
+
+        return "\(W)\(R) \(c)\(t)\(i)\(C)\(D)\(l)\(d)\(a)"
+    }
+}
+#endif

Pods/Alamofire/Source/Notifications.swift

@@ -0,0 +1,115 @@
+//
+//  Notifications.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension Request {
+    /// Posted when a `Request` is resumed. The `Notification` contains the resumed `Request`.
+    public static let didResumeNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didResume")
+    /// Posted when a `Request` is suspended. The `Notification` contains the suspended `Request`.
+    public static let didSuspendNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didSuspend")
+    /// Posted when a `Request` is cancelled. The `Notification` contains the cancelled `Request`.
+    public static let didCancelNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didCancel")
+    /// Posted when a `Request` is finished. The `Notification` contains the completed `Request`.
+    public static let didFinishNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didFinish")
+
+    /// Posted when a `URLSessionTask` is resumed. The `Notification` contains the `Request` associated with the `URLSessionTask`.
+    public static let didResumeTaskNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didResumeTask")
+    /// Posted when a `URLSessionTask` is suspended. The `Notification` contains the `Request` associated with the `URLSessionTask`.
+    public static let didSuspendTaskNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didSuspendTask")
+    /// Posted when a `URLSessionTask` is cancelled. The `Notification` contains the `Request` associated with the `URLSessionTask`.
+    public static let didCancelTaskNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didCancelTask")
+    /// Posted when a `URLSessionTask` is completed. The `Notification` contains the `Request` associated with the `URLSessionTask`.
+    public static let didCompleteTaskNotification = Notification.Name(rawValue: "org.alamofire.notification.name.request.didCompleteTask")
+}
+
+// MARK: -
+
+extension Notification {
+    /// The `Request` contained by the instance's `userInfo`, `nil` otherwise.
+    public var request: Request? {
+        userInfo?[String.requestKey] as? Request
+    }
+
+    /// Convenience initializer for a `Notification` containing a `Request` payload.
+    ///
+    /// - Parameters:
+    ///   - name:    The name of the notification.
+    ///   - request: The `Request` payload.
+    init(name: Notification.Name, request: Request) {
+        self.init(name: name, object: nil, userInfo: [String.requestKey: request])
+    }
+}
+
+extension NotificationCenter {
+    /// Convenience function for posting notifications with `Request` payloads.
+    ///
+    /// - Parameters:
+    ///   - name:    The name of the notification.
+    ///   - request: The `Request` payload.
+    func postNotification(named name: Notification.Name, with request: Request) {
+        let notification = Notification(name: name, request: request)
+        post(notification)
+    }
+}
+
+extension String {
+    /// User info dictionary key representing the `Request` associated with the notification.
+    fileprivate static let requestKey = "org.alamofire.notification.key.request"
+}
+
+/// `EventMonitor` that provides Alamofire's notifications.
+public final class AlamofireNotifications: EventMonitor {
+    public func requestDidResume(_ request: Request) {
+        NotificationCenter.default.postNotification(named: Request.didResumeNotification, with: request)
+    }
+
+    public func requestDidSuspend(_ request: Request) {
+        NotificationCenter.default.postNotification(named: Request.didSuspendNotification, with: request)
+    }
+
+    public func requestDidCancel(_ request: Request) {
+        NotificationCenter.default.postNotification(named: Request.didCancelNotification, with: request)
+    }
+
+    public func requestDidFinish(_ request: Request) {
+        NotificationCenter.default.postNotification(named: Request.didFinishNotification, with: request)
+    }
+
+    public func request(_ request: Request, didResumeTask task: URLSessionTask) {
+        NotificationCenter.default.postNotification(named: Request.didResumeTaskNotification, with: request)
+    }
+
+    public func request(_ request: Request, didSuspendTask task: URLSessionTask) {
+        NotificationCenter.default.postNotification(named: Request.didSuspendTaskNotification, with: request)
+    }
+
+    public func request(_ request: Request, didCancelTask task: URLSessionTask) {
+        NotificationCenter.default.postNotification(named: Request.didCancelTaskNotification, with: request)
+    }
+
+    public func request(_ request: Request, didCompleteTask task: URLSessionTask, with error: AFError?) {
+        NotificationCenter.default.postNotification(named: Request.didCompleteTaskNotification, with: request)
+    }
+}

Pods/Alamofire/Source/OperationQueue+Alamofire.swift

@@ -0,0 +1,49 @@
+//
+//  OperationQueue+Alamofire.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension OperationQueue {
+    /// Creates an instance using the provided parameters.
+    ///
+    /// - Parameters:
+    ///   - qualityOfService:            `QualityOfService` to be applied to the queue. `.default` by default.
+    ///   - maxConcurrentOperationCount: Maximum concurrent operations.
+    ///                                  `OperationQueue.defaultMaxConcurrentOperationCount` by default.
+    ///   - underlyingQueue: Underlying  `DispatchQueue`. `nil` by default.
+    ///   - name:                        Name for the queue. `nil` by default.
+    ///   - startSuspended:              Whether the queue starts suspended. `false` by default.
+    convenience init(qualityOfService: QualityOfService = .default,
+                     maxConcurrentOperationCount: Int = OperationQueue.defaultMaxConcurrentOperationCount,
+                     underlyingQueue: DispatchQueue? = nil,
+                     name: String? = nil,
+                     startSuspended: Bool = false) {
+        self.init()
+        self.qualityOfService = qualityOfService
+        self.maxConcurrentOperationCount = maxConcurrentOperationCount
+        self.underlyingQueue = underlyingQueue
+        self.name = name
+        isSuspended = startSuspended
+    }
+}

Pods/Alamofire/Source/ParameterEncoder.swift

@@ -0,0 +1,184 @@
+//
+//  ParameterEncoder.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A type that can encode any `Encodable` type into a `URLRequest`.
+public protocol ParameterEncoder {
+    /// Encode the provided `Encodable` parameters into `request`.
+    ///
+    /// - Parameters:
+    ///   - parameters: The `Encodable` parameter value.
+    ///   - request:    The `URLRequest` into which to encode the parameters.
+    ///
+    /// - Returns:      A `URLRequest` with the result of the encoding.
+    /// - Throws:       An `Error` when encoding fails. For Alamofire provided encoders, this will be an instance of
+    ///                 `AFError.parameterEncoderFailed` with an associated `ParameterEncoderFailureReason`.
+    func encode<Parameters: Encodable>(_ parameters: Parameters?, into request: URLRequest) throws -> URLRequest
+}
+
+/// A `ParameterEncoder` that encodes types as JSON body data.
+///
+/// If no `Content-Type` header is already set on the provided `URLRequest`s, it's set to `application/json`.
+open class JSONParameterEncoder: ParameterEncoder {
+    /// Returns an encoder with default parameters.
+    public static var `default`: JSONParameterEncoder { JSONParameterEncoder() }
+
+    /// Returns an encoder with `JSONEncoder.outputFormatting` set to `.prettyPrinted`.
+    public static var prettyPrinted: JSONParameterEncoder {
+        let encoder = JSONEncoder()
+        encoder.outputFormatting = .prettyPrinted
+
+        return JSONParameterEncoder(encoder: encoder)
+    }
+
+    /// Returns an encoder with `JSONEncoder.outputFormatting` set to `.sortedKeys`.
+    @available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
+    public static var sortedKeys: JSONParameterEncoder {
+        let encoder = JSONEncoder()
+        encoder.outputFormatting = .sortedKeys
+
+        return JSONParameterEncoder(encoder: encoder)
+    }
+
+    /// `JSONEncoder` used to encode parameters.
+    public let encoder: JSONEncoder
+
+    /// Creates an instance with the provided `JSONEncoder`.
+    ///
+    /// - Parameter encoder: The `JSONEncoder`. `JSONEncoder()` by default.
+    public init(encoder: JSONEncoder = JSONEncoder()) {
+        self.encoder = encoder
+    }
+
+    open func encode<Parameters: Encodable>(_ parameters: Parameters?,
+                                            into request: URLRequest) throws -> URLRequest {
+        guard let parameters = parameters else { return request }
+
+        var request = request
+
+        do {
+            let data = try encoder.encode(parameters)
+            request.httpBody = data
+            if request.headers["Content-Type"] == nil {
+                request.headers.update(.contentType("application/json"))
+            }
+        } catch {
+            throw AFError.parameterEncodingFailed(reason: .jsonEncodingFailed(error: error))
+        }
+
+        return request
+    }
+}
+
+/// A `ParameterEncoder` that encodes types as URL-encoded query strings to be set on the URL or as body data, depending
+/// on the `Destination` set.
+///
+/// If no `Content-Type` header is already set on the provided `URLRequest`s, it will be set to
+/// `application/x-www-form-urlencoded; charset=utf-8`.
+///
+/// Encoding behavior can be customized by passing an instance of `URLEncodedFormEncoder` to the initializer.
+open class URLEncodedFormParameterEncoder: ParameterEncoder {
+    /// Defines where the URL-encoded string should be set for each `URLRequest`.
+    public enum Destination {
+        /// Applies the encoded query string to any existing query string for `.get`, `.head`, and `.delete` request.
+        /// Sets it to the `httpBody` for all other methods.
+        case methodDependent
+        /// Applies the encoded query string to any existing query string from the `URLRequest`.
+        case queryString
+        /// Applies the encoded query string to the `httpBody` of the `URLRequest`.
+        case httpBody
+
+        /// Determines whether the URL-encoded string should be applied to the `URLRequest`'s `url`.
+        ///
+        /// - Parameter method: The `HTTPMethod`.
+        ///
+        /// - Returns:          Whether the URL-encoded string should be applied to a `URL`.
+        func encodesParametersInURL(for method: HTTPMethod) -> Bool {
+            switch self {
+            case .methodDependent: return [.get, .head, .delete].contains(method)
+            case .queryString: return true
+            case .httpBody: return false
+            }
+        }
+    }
+
+    /// Returns an encoder with default parameters.
+    public static var `default`: URLEncodedFormParameterEncoder { URLEncodedFormParameterEncoder() }
+
+    /// The `URLEncodedFormEncoder` to use.
+    public let encoder: URLEncodedFormEncoder
+
+    /// The `Destination` for the URL-encoded string.
+    public let destination: Destination
+
+    /// Creates an instance with the provided `URLEncodedFormEncoder` instance and `Destination` value.
+    ///
+    /// - Parameters:
+    ///   - encoder:     The `URLEncodedFormEncoder`. `URLEncodedFormEncoder()` by default.
+    ///   - destination: The `Destination`. `.methodDependent` by default.
+    public init(encoder: URLEncodedFormEncoder = URLEncodedFormEncoder(), destination: Destination = .methodDependent) {
+        self.encoder = encoder
+        self.destination = destination
+    }
+
+    open func encode<Parameters: Encodable>(_ parameters: Parameters?,
+                                            into request: URLRequest) throws -> URLRequest {
+        guard let parameters = parameters else { return request }
+
+        var request = request
+
+        guard let url = request.url else {
+            throw AFError.parameterEncoderFailed(reason: .missingRequiredComponent(.url))
+        }
+
+        guard let method = request.method else {
+            let rawValue = request.method?.rawValue ?? "nil"
+            throw AFError.parameterEncoderFailed(reason: .missingRequiredComponent(.httpMethod(rawValue: rawValue)))
+        }
+
+        if destination.encodesParametersInURL(for: method),
+           var components = URLComponents(url: url, resolvingAgainstBaseURL: false) {
+            let query: String = try Result<String, Error> { try encoder.encode(parameters) }
+                .mapError { AFError.parameterEncoderFailed(reason: .encoderFailed(error: $0)) }.get()
+            let newQueryString = [components.percentEncodedQuery, query].compactMap { $0 }.joinedWithAmpersands()
+            components.percentEncodedQuery = newQueryString.isEmpty ? nil : newQueryString
+
+            guard let newURL = components.url else {
+                throw AFError.parameterEncoderFailed(reason: .missingRequiredComponent(.url))
+            }
+
+            request.url = newURL
+        } else {
+            if request.headers["Content-Type"] == nil {
+                request.headers.update(.contentType("application/x-www-form-urlencoded; charset=utf-8"))
+            }
+
+            request.httpBody = try Result<Data, Error> { try encoder.encode(parameters) }
+                .mapError { AFError.parameterEncoderFailed(reason: .encoderFailed(error: $0)) }.get()
+        }
+
+        return request
+    }
+}

Pods/Alamofire/Source/ParameterEncoding.swift

@@ -0,0 +1,317 @@
+//
+//  ParameterEncoding.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A dictionary of parameters to apply to a `URLRequest`.
+public typealias Parameters = [String: Any]
+
+/// A type used to define how a set of parameters are applied to a `URLRequest`.
+public protocol ParameterEncoding {
+    /// Creates a `URLRequest` by encoding parameters and applying them on the passed request.
+    ///
+    /// - Parameters:
+    ///   - urlRequest: `URLRequestConvertible` value onto which parameters will be encoded.
+    ///   - parameters: `Parameters` to encode onto the request.
+    ///
+    /// - Returns:      The encoded `URLRequest`.
+    /// - Throws:       Any `Error` produced during parameter encoding.
+    func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest
+}
+
+// MARK: -
+
+/// Creates a url-encoded query string to be set as or appended to any existing URL query string or set as the HTTP
+/// body of the URL request. Whether the query string is set or appended to any existing URL query string or set as
+/// the HTTP body depends on the destination of the encoding.
+///
+/// The `Content-Type` HTTP header field of an encoded request with HTTP body is set to
+/// `application/x-www-form-urlencoded; charset=utf-8`.
+///
+/// There is no published specification for how to encode collection types. By default the convention of appending
+/// `[]` to the key for array values (`foo[]=1&foo[]=2`), and appending the key surrounded by square brackets for
+/// nested dictionary values (`foo[bar]=baz`) is used. Optionally, `ArrayEncoding` can be used to omit the
+/// square brackets appended to array keys.
+///
+/// `BoolEncoding` can be used to configure how boolean values are encoded. The default behavior is to encode
+/// `true` as 1 and `false` as 0.
+public struct URLEncoding: ParameterEncoding {
+    // MARK: Helper Types
+
+    /// Defines whether the url-encoded query string is applied to the existing query string or HTTP body of the
+    /// resulting URL request.
+    public enum Destination {
+        /// Applies encoded query string result to existing query string for `GET`, `HEAD` and `DELETE` requests and
+        /// sets as the HTTP body for requests with any other HTTP method.
+        case methodDependent
+        /// Sets or appends encoded query string result to existing query string.
+        case queryString
+        /// Sets encoded query string result as the HTTP body of the URL request.
+        case httpBody
+
+        func encodesParametersInURL(for method: HTTPMethod) -> Bool {
+            switch self {
+            case .methodDependent: return [.get, .head, .delete].contains(method)
+            case .queryString: return true
+            case .httpBody: return false
+            }
+        }
+    }
+
+    /// Configures how `Array` parameters are encoded.
+    public enum ArrayEncoding {
+        /// An empty set of square brackets is appended to the key for every value. This is the default behavior.
+        case brackets
+        /// No brackets are appended. The key is encoded as is.
+        case noBrackets
+
+        func encode(key: String) -> String {
+            switch self {
+            case .brackets:
+                return "\(key)[]"
+            case .noBrackets:
+                return key
+            }
+        }
+    }
+
+    /// Configures how `Bool` parameters are encoded.
+    public enum BoolEncoding {
+        /// Encode `true` as `1` and `false` as `0`. This is the default behavior.
+        case numeric
+        /// Encode `true` and `false` as string literals.
+        case literal
+
+        func encode(value: Bool) -> String {
+            switch self {
+            case .numeric:
+                return value ? "1" : "0"
+            case .literal:
+                return value ? "true" : "false"
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    /// Returns a default `URLEncoding` instance with a `.methodDependent` destination.
+    public static var `default`: URLEncoding { URLEncoding() }
+
+    /// Returns a `URLEncoding` instance with a `.queryString` destination.
+    public static var queryString: URLEncoding { URLEncoding(destination: .queryString) }
+
+    /// Returns a `URLEncoding` instance with an `.httpBody` destination.
+    public static var httpBody: URLEncoding { URLEncoding(destination: .httpBody) }
+
+    /// The destination defining where the encoded query string is to be applied to the URL request.
+    public let destination: Destination
+
+    /// The encoding to use for `Array` parameters.
+    public let arrayEncoding: ArrayEncoding
+
+    /// The encoding to use for `Bool` parameters.
+    public let boolEncoding: BoolEncoding
+
+    // MARK: Initialization
+
+    /// Creates an instance using the specified parameters.
+    ///
+    /// - Parameters:
+    ///   - destination:   `Destination` defining where the encoded query string will be applied. `.methodDependent` by
+    ///                    default.
+    ///   - arrayEncoding: `ArrayEncoding` to use. `.brackets` by default.
+    ///   - boolEncoding:  `BoolEncoding` to use. `.numeric` by default.
+    public init(destination: Destination = .methodDependent,
+                arrayEncoding: ArrayEncoding = .brackets,
+                boolEncoding: BoolEncoding = .numeric) {
+        self.destination = destination
+        self.arrayEncoding = arrayEncoding
+        self.boolEncoding = boolEncoding
+    }
+
+    // MARK: Encoding
+
+    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let parameters = parameters else { return urlRequest }
+
+        if let method = urlRequest.method, destination.encodesParametersInURL(for: method) {
+            guard let url = urlRequest.url else {
+                throw AFError.parameterEncodingFailed(reason: .missingURL)
+            }
+
+            if var urlComponents = URLComponents(url: url, resolvingAgainstBaseURL: false), !parameters.isEmpty {
+                let percentEncodedQuery = (urlComponents.percentEncodedQuery.map { $0 + "&" } ?? "") + query(parameters)
+                urlComponents.percentEncodedQuery = percentEncodedQuery
+                urlRequest.url = urlComponents.url
+            }
+        } else {
+            if urlRequest.headers["Content-Type"] == nil {
+                urlRequest.headers.update(.contentType("application/x-www-form-urlencoded; charset=utf-8"))
+            }
+
+            urlRequest.httpBody = Data(query(parameters).utf8)
+        }
+
+        return urlRequest
+    }
+
+    /// Creates a percent-escaped, URL encoded query string components from the given key-value pair recursively.
+    ///
+    /// - Parameters:
+    ///   - key:   Key of the query component.
+    ///   - value: Value of the query component.
+    ///
+    /// - Returns: The percent-escaped, URL encoded query string components.
+    public func queryComponents(fromKey key: String, value: Any) -> [(String, String)] {
+        var components: [(String, String)] = []
+        switch value {
+        case let dictionary as [String: Any]:
+            for (nestedKey, value) in dictionary {
+                components += queryComponents(fromKey: "\(key)[\(nestedKey)]", value: value)
+            }
+        case let array as [Any]:
+            for value in array {
+                components += queryComponents(fromKey: arrayEncoding.encode(key: key), value: value)
+            }
+        case let number as NSNumber:
+            if number.isBool {
+                components.append((escape(key), escape(boolEncoding.encode(value: number.boolValue))))
+            } else {
+                components.append((escape(key), escape("\(number)")))
+            }
+        case let bool as Bool:
+            components.append((escape(key), escape(boolEncoding.encode(value: bool))))
+        default:
+            components.append((escape(key), escape("\(value)")))
+        }
+        return components
+    }
+
+    /// Creates a percent-escaped string following RFC 3986 for a query string key or value.
+    ///
+    /// - Parameter string: `String` to be percent-escaped.
+    ///
+    /// - Returns:          The percent-escaped `String`.
+    public func escape(_ string: String) -> String {
+        string.addingPercentEncoding(withAllowedCharacters: .afURLQueryAllowed) ?? string
+    }
+
+    private func query(_ parameters: [String: Any]) -> String {
+        var components: [(String, String)] = []
+
+        for key in parameters.keys.sorted(by: <) {
+            let value = parameters[key]!
+            components += queryComponents(fromKey: key, value: value)
+        }
+        return components.map { "\($0)=\($1)" }.joined(separator: "&")
+    }
+}
+
+// MARK: -
+
+/// Uses `JSONSerialization` to create a JSON representation of the parameters object, which is set as the body of the
+/// request. The `Content-Type` HTTP header field of an encoded request is set to `application/json`.
+public struct JSONEncoding: ParameterEncoding {
+    // MARK: Properties
+
+    /// Returns a `JSONEncoding` instance with default writing options.
+    public static var `default`: JSONEncoding { JSONEncoding() }
+
+    /// Returns a `JSONEncoding` instance with `.prettyPrinted` writing options.
+    public static var prettyPrinted: JSONEncoding { JSONEncoding(options: .prettyPrinted) }
+
+    /// The options for writing the parameters as JSON data.
+    public let options: JSONSerialization.WritingOptions
+
+    // MARK: Initialization
+
+    /// Creates an instance using the specified `WritingOptions`.
+    ///
+    /// - Parameter options: `JSONSerialization.WritingOptions` to use.
+    public init(options: JSONSerialization.WritingOptions = []) {
+        self.options = options
+    }
+
+    // MARK: Encoding
+
+    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let parameters = parameters else { return urlRequest }
+
+        do {
+            let data = try JSONSerialization.data(withJSONObject: parameters, options: options)
+
+            if urlRequest.headers["Content-Type"] == nil {
+                urlRequest.headers.update(.contentType("application/json"))
+            }
+
+            urlRequest.httpBody = data
+        } catch {
+            throw AFError.parameterEncodingFailed(reason: .jsonEncodingFailed(error: error))
+        }
+
+        return urlRequest
+    }
+
+    /// Encodes any JSON compatible object into a `URLRequest`.
+    ///
+    /// - Parameters:
+    ///   - urlRequest: `URLRequestConvertible` value into which the object will be encoded.
+    ///   - jsonObject: `Any` value (must be JSON compatible` to be encoded into the `URLRequest`. `nil` by default.
+    ///
+    /// - Returns:      The encoded `URLRequest`.
+    /// - Throws:       Any `Error` produced during encoding.
+    public func encode(_ urlRequest: URLRequestConvertible, withJSONObject jsonObject: Any? = nil) throws -> URLRequest {
+        var urlRequest = try urlRequest.asURLRequest()
+
+        guard let jsonObject = jsonObject else { return urlRequest }
+
+        do {
+            let data = try JSONSerialization.data(withJSONObject: jsonObject, options: options)
+
+            if urlRequest.headers["Content-Type"] == nil {
+                urlRequest.headers.update(.contentType("application/json"))
+            }
+
+            urlRequest.httpBody = data
+        } catch {
+            throw AFError.parameterEncodingFailed(reason: .jsonEncodingFailed(error: error))
+        }
+
+        return urlRequest
+    }
+}
+
+// MARK: -
+
+extension NSNumber {
+    fileprivate var isBool: Bool {
+        // Use Obj-C type encoding to check whether the underlying type is a `Bool`, as it's guaranteed as part of
+        // swift-corelibs-foundation, per [this discussion on the Swift forums](https://forums.swift.org/t/alamofire-on-linux-possible-but-not-release-ready/34553/22).
+        String(cString: objCType) == "c"
+    }
+}

Pods/Alamofire/Source/Protected.swift

@@ -0,0 +1,224 @@
+//
+//  Protected.swift
+//
+//  Copyright (c) 2014-2020 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+private protocol Lock {
+    func lock()
+    func unlock()
+}
+
+extension Lock {
+    /// Executes a closure returning a value while acquiring the lock.
+    ///
+    /// - Parameter closure: The closure to run.
+    ///
+    /// - Returns:           The value the closure generated.
+    func around<T>(_ closure: () -> T) -> T {
+        lock(); defer { unlock() }
+        return closure()
+    }
+
+    /// Execute a closure while acquiring the lock.
+    ///
+    /// - Parameter closure: The closure to run.
+    func around(_ closure: () -> Void) {
+        lock(); defer { unlock() }
+        closure()
+    }
+}
+
+#if os(Linux)
+/// A `pthread_mutex_t` wrapper.
+final class MutexLock: Lock {
+    private var mutex: UnsafeMutablePointer<pthread_mutex_t>
+
+    init() {
+        mutex = .allocate(capacity: 1)
+
+        var attr = pthread_mutexattr_t()
+        pthread_mutexattr_init(&attr)
+        pthread_mutexattr_settype(&attr, .init(PTHREAD_MUTEX_ERRORCHECK))
+
+        let error = pthread_mutex_init(mutex, &attr)
+        precondition(error == 0, "Failed to create pthread_mutex")
+    }
+
+    deinit {
+        let error = pthread_mutex_destroy(mutex)
+        precondition(error == 0, "Failed to destroy pthread_mutex")
+    }
+
+    fileprivate func lock() {
+        let error = pthread_mutex_lock(mutex)
+        precondition(error == 0, "Failed to lock pthread_mutex")
+    }
+
+    fileprivate func unlock() {
+        let error = pthread_mutex_unlock(mutex)
+        precondition(error == 0, "Failed to unlock pthread_mutex")
+    }
+}
+#endif
+
+#if os(macOS) || os(iOS) || os(watchOS) || os(tvOS)
+/// An `os_unfair_lock` wrapper.
+final class UnfairLock: Lock {
+    private let unfairLock: os_unfair_lock_t
+
+    init() {
+        unfairLock = .allocate(capacity: 1)
+        unfairLock.initialize(to: os_unfair_lock())
+    }
+
+    deinit {
+        unfairLock.deinitialize(count: 1)
+        unfairLock.deallocate()
+    }
+
+    fileprivate func lock() {
+        os_unfair_lock_lock(unfairLock)
+    }
+
+    fileprivate func unlock() {
+        os_unfair_lock_unlock(unfairLock)
+    }
+}
+#endif
+
+/// A thread-safe wrapper around a value.
+@propertyWrapper
+@dynamicMemberLookup
+final class Protected<T> {
+    #if os(macOS) || os(iOS) || os(watchOS) || os(tvOS)
+    private let lock = UnfairLock()
+    #elseif os(Linux)
+    private let lock = MutexLock()
+    #endif
+    private var value: T
+
+    init(_ value: T) {
+        self.value = value
+    }
+
+    /// The contained value. Unsafe for anything more than direct read or write.
+    var wrappedValue: T {
+        get { lock.around { value } }
+        set { lock.around { value = newValue } }
+    }
+
+    var projectedValue: Protected<T> { self }
+
+    init(wrappedValue: T) {
+        value = wrappedValue
+    }
+
+    /// Synchronously read or transform the contained value.
+    ///
+    /// - Parameter closure: The closure to execute.
+    ///
+    /// - Returns:           The return value of the closure passed.
+    func read<U>(_ closure: (T) -> U) -> U {
+        lock.around { closure(self.value) }
+    }
+
+    /// Synchronously modify the protected value.
+    ///
+    /// - Parameter closure: The closure to execute.
+    ///
+    /// - Returns:           The modified value.
+    @discardableResult
+    func write<U>(_ closure: (inout T) -> U) -> U {
+        lock.around { closure(&self.value) }
+    }
+
+    subscript<Property>(dynamicMember keyPath: WritableKeyPath<T, Property>) -> Property {
+        get { lock.around { value[keyPath: keyPath] } }
+        set { lock.around { value[keyPath: keyPath] = newValue } }
+    }
+}
+
+extension Protected where T: RangeReplaceableCollection {
+    /// Adds a new element to the end of this protected collection.
+    ///
+    /// - Parameter newElement: The `Element` to append.
+    func append(_ newElement: T.Element) {
+        write { (ward: inout T) in
+            ward.append(newElement)
+        }
+    }
+
+    /// Adds the elements of a sequence to the end of this protected collection.
+    ///
+    /// - Parameter newElements: The `Sequence` to append.
+    func append<S: Sequence>(contentsOf newElements: S) where S.Element == T.Element {
+        write { (ward: inout T) in
+            ward.append(contentsOf: newElements)
+        }
+    }
+
+    /// Add the elements of a collection to the end of the protected collection.
+    ///
+    /// - Parameter newElements: The `Collection` to append.
+    func append<C: Collection>(contentsOf newElements: C) where C.Element == T.Element {
+        write { (ward: inout T) in
+            ward.append(contentsOf: newElements)
+        }
+    }
+}
+
+extension Protected where T == Data? {
+    /// Adds the contents of a `Data` value to the end of the protected `Data`.
+    ///
+    /// - Parameter data: The `Data` to be appended.
+    func append(_ data: Data) {
+        write { (ward: inout T) in
+            ward?.append(data)
+        }
+    }
+}
+
+extension Protected where T == Request.MutableState {
+    /// Attempts to transition to the passed `State`.
+    ///
+    /// - Parameter state: The `State` to attempt transition to.
+    ///
+    /// - Returns:         Whether the transition occurred.
+    func attemptToTransitionTo(_ state: Request.State) -> Bool {
+        lock.around {
+            guard value.state.canTransitionTo(state) else { return false }
+
+            value.state = state
+
+            return true
+        }
+    }
+
+    /// Perform a closure while locked with the provided `Request.State`.
+    ///
+    /// - Parameter perform: The closure to perform while locked.
+    func withState(perform: (Request.State) -> Void) {
+        lock.around { perform(value.state) }
+    }
+}

Pods/Alamofire/Source/RedirectHandler.swift

@@ -0,0 +1,95 @@
+//
+//  RedirectHandler.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A type that handles how an HTTP redirect response from a remote server should be redirected to the new request.
+public protocol RedirectHandler {
+    /// Determines how the HTTP redirect response should be redirected to the new request.
+    ///
+    /// The `completion` closure should be passed one of three possible options:
+    ///
+    ///   1. The new request specified by the redirect (this is the most common use case).
+    ///   2. A modified version of the new request (you may want to route it somewhere else).
+    ///   3. A `nil` value to deny the redirect request and return the body of the redirect response.
+    ///
+    /// - Parameters:
+    ///   - task:       The `URLSessionTask` whose request resulted in a redirect.
+    ///   - request:    The `URLRequest` to the new location specified by the redirect response.
+    ///   - response:   The `HTTPURLResponse` containing the server's response to the original request.
+    ///   - completion: The closure to execute containing the new `URLRequest`, a modified `URLRequest`, or `nil`.
+    func task(_ task: URLSessionTask,
+              willBeRedirectedTo request: URLRequest,
+              for response: HTTPURLResponse,
+              completion: @escaping (URLRequest?) -> Void)
+}
+
+// MARK: -
+
+/// `Redirector` is a convenience `RedirectHandler` making it easy to follow, not follow, or modify a redirect.
+public struct Redirector {
+    /// Defines the behavior of the `Redirector` type.
+    public enum Behavior {
+        /// Follow the redirect as defined in the response.
+        case follow
+        /// Do not follow the redirect defined in the response.
+        case doNotFollow
+        /// Modify the redirect request defined in the response.
+        case modify((URLSessionTask, URLRequest, HTTPURLResponse) -> URLRequest?)
+    }
+
+    /// Returns a `Redirector` with a `.follow` `Behavior`.
+    public static let follow = Redirector(behavior: .follow)
+    /// Returns a `Redirector` with a `.doNotFollow` `Behavior`.
+    public static let doNotFollow = Redirector(behavior: .doNotFollow)
+
+    /// The `Behavior` of the `Redirector`.
+    public let behavior: Behavior
+
+    /// Creates a `Redirector` instance from the `Behavior`.
+    ///
+    /// - Parameter behavior: The `Behavior`.
+    public init(behavior: Behavior) {
+        self.behavior = behavior
+    }
+}
+
+// MARK: -
+
+extension Redirector: RedirectHandler {
+    public func task(_ task: URLSessionTask,
+                     willBeRedirectedTo request: URLRequest,
+                     for response: HTTPURLResponse,
+                     completion: @escaping (URLRequest?) -> Void) {
+        switch behavior {
+        case .follow:
+            completion(request)
+        case .doNotFollow:
+            completion(nil)
+        case let .modify(closure):
+            let request = closure(task, request, response)
+            completion(request)
+        }
+    }
+}

Pods/Alamofire/Source/Request.swift

@@ -0,0 +1,1882 @@
+//
+//  Request.swift
+//
+//  Copyright (c) 2014-2020 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// `Request` is the common superclass of all Alamofire request types and provides common state, delegate, and callback
+/// handling.
+public class Request {
+    /// State of the `Request`, with managed transitions between states set when calling `resume()`, `suspend()`, or
+    /// `cancel()` on the `Request`.
+    public enum State {
+        /// Initial state of the `Request`.
+        case initialized
+        /// `State` set when `resume()` is called. Any tasks created for the `Request` will have `resume()` called on
+        /// them in this state.
+        case resumed
+        /// `State` set when `suspend()` is called. Any tasks created for the `Request` will have `suspend()` called on
+        /// them in this state.
+        case suspended
+        /// `State` set when `cancel()` is called. Any tasks created for the `Request` will have `cancel()` called on
+        /// them. Unlike `resumed` or `suspended`, once in the `cancelled` state, the `Request` can no longer transition
+        /// to any other state.
+        case cancelled
+        /// `State` set when all response serialization completion closures have been cleared on the `Request` and
+        /// enqueued on their respective queues.
+        case finished
+
+        /// Determines whether `self` can be transitioned to the provided `State`.
+        func canTransitionTo(_ state: State) -> Bool {
+            switch (self, state) {
+            case (.initialized, _):
+                return true
+            case (_, .initialized), (.cancelled, _), (.finished, _):
+                return false
+            case (.resumed, .cancelled), (.suspended, .cancelled), (.resumed, .suspended), (.suspended, .resumed):
+                return true
+            case (.suspended, .suspended), (.resumed, .resumed):
+                return false
+            case (_, .finished):
+                return true
+            }
+        }
+    }
+
+    // MARK: - Initial State
+
+    /// `UUID` providing a unique identifier for the `Request`, used in the `Hashable` and `Equatable` conformances.
+    public let id: UUID
+    /// The serial queue for all internal async actions.
+    public let underlyingQueue: DispatchQueue
+    /// The queue used for all serialization actions. By default it's a serial queue that targets `underlyingQueue`.
+    public let serializationQueue: DispatchQueue
+    /// `EventMonitor` used for event callbacks.
+    public let eventMonitor: EventMonitor?
+    /// The `Request`'s interceptor.
+    public let interceptor: RequestInterceptor?
+    /// The `Request`'s delegate.
+    public private(set) weak var delegate: RequestDelegate?
+
+    // MARK: - Mutable State
+
+    /// Type encapsulating all mutable state that may need to be accessed from anything other than the `underlyingQueue`.
+    struct MutableState {
+        /// State of the `Request`.
+        var state: State = .initialized
+        /// `ProgressHandler` and `DispatchQueue` provided for upload progress callbacks.
+        var uploadProgressHandler: (handler: ProgressHandler, queue: DispatchQueue)?
+        /// `ProgressHandler` and `DispatchQueue` provided for download progress callbacks.
+        var downloadProgressHandler: (handler: ProgressHandler, queue: DispatchQueue)?
+        /// `RedirectHandler` provided for to handle request redirection.
+        var redirectHandler: RedirectHandler?
+        /// `CachedResponseHandler` provided to handle response caching.
+        var cachedResponseHandler: CachedResponseHandler?
+        /// Queue and closure called when the `Request` is able to create a cURL description of itself.
+        var cURLHandler: (queue: DispatchQueue, handler: (String) -> Void)?
+        /// Queue and closure called when the `Request` creates a `URLRequest`.
+        var urlRequestHandler: (queue: DispatchQueue, handler: (URLRequest) -> Void)?
+        /// Queue and closure called when the `Request` creates a `URLSessionTask`.
+        var urlSessionTaskHandler: (queue: DispatchQueue, handler: (URLSessionTask) -> Void)?
+        /// Response serialization closures that handle response parsing.
+        var responseSerializers: [() -> Void] = []
+        /// Response serialization completion closures executed once all response serializers are complete.
+        var responseSerializerCompletions: [() -> Void] = []
+        /// Whether response serializer processing is finished.
+        var responseSerializerProcessingFinished = false
+        /// `URLCredential` used for authentication challenges.
+        var credential: URLCredential?
+        /// All `URLRequest`s created by Alamofire on behalf of the `Request`.
+        var requests: [URLRequest] = []
+        /// All `URLSessionTask`s created by Alamofire on behalf of the `Request`.
+        var tasks: [URLSessionTask] = []
+        /// All `URLSessionTaskMetrics` values gathered by Alamofire on behalf of the `Request`. Should correspond
+        /// exactly the the `tasks` created.
+        var metrics: [URLSessionTaskMetrics] = []
+        /// Number of times any retriers provided retried the `Request`.
+        var retryCount = 0
+        /// Final `AFError` for the `Request`, whether from various internal Alamofire calls or as a result of a `task`.
+        var error: AFError?
+        /// Whether the instance has had `finish()` called and is running the serializers. Should be replaced with a
+        /// representation in the state machine in the future.
+        var isFinishing = false
+    }
+
+    /// Protected `MutableState` value that provides thread-safe access to state values.
+    @Protected
+    fileprivate var mutableState = MutableState()
+
+    /// `State` of the `Request`.
+    public var state: State { mutableState.state }
+    /// Returns whether `state` is `.initialized`.
+    public var isInitialized: Bool { state == .initialized }
+    /// Returns whether `state is `.resumed`.
+    public var isResumed: Bool { state == .resumed }
+    /// Returns whether `state` is `.suspended`.
+    public var isSuspended: Bool { state == .suspended }
+    /// Returns whether `state` is `.cancelled`.
+    public var isCancelled: Bool { state == .cancelled }
+    /// Returns whether `state` is `.finished`.
+    public var isFinished: Bool { state == .finished }
+
+    // MARK: Progress
+
+    /// Closure type executed when monitoring the upload or download progress of a request.
+    public typealias ProgressHandler = (Progress) -> Void
+
+    /// `Progress` of the upload of the body of the executed `URLRequest`. Reset to `0` if the `Request` is retried.
+    public let uploadProgress = Progress(totalUnitCount: 0)
+    /// `Progress` of the download of any response data. Reset to `0` if the `Request` is retried.
+    public let downloadProgress = Progress(totalUnitCount: 0)
+    /// `ProgressHandler` called when `uploadProgress` is updated, on the provided `DispatchQueue`.
+    private var uploadProgressHandler: (handler: ProgressHandler, queue: DispatchQueue)? {
+        get { mutableState.uploadProgressHandler }
+        set { mutableState.uploadProgressHandler = newValue }
+    }
+
+    /// `ProgressHandler` called when `downloadProgress` is updated, on the provided `DispatchQueue`.
+    fileprivate var downloadProgressHandler: (handler: ProgressHandler, queue: DispatchQueue)? {
+        get { mutableState.downloadProgressHandler }
+        set { mutableState.downloadProgressHandler = newValue }
+    }
+
+    // MARK: Redirect Handling
+
+    /// `RedirectHandler` set on the instance.
+    public private(set) var redirectHandler: RedirectHandler? {
+        get { mutableState.redirectHandler }
+        set { mutableState.redirectHandler = newValue }
+    }
+
+    // MARK: Cached Response Handling
+
+    /// `CachedResponseHandler` set on the instance.
+    public private(set) var cachedResponseHandler: CachedResponseHandler? {
+        get { mutableState.cachedResponseHandler }
+        set { mutableState.cachedResponseHandler = newValue }
+    }
+
+    // MARK: URLCredential
+
+    /// `URLCredential` used for authentication challenges. Created by calling one of the `authenticate` methods.
+    public private(set) var credential: URLCredential? {
+        get { mutableState.credential }
+        set { mutableState.credential = newValue }
+    }
+
+    // MARK: Validators
+
+    /// `Validator` callback closures that store the validation calls enqueued.
+    @Protected
+    fileprivate var validators: [() -> Void] = []
+
+    // MARK: URLRequests
+
+    /// All `URLRequests` created on behalf of the `Request`, including original and adapted requests.
+    public var requests: [URLRequest] { mutableState.requests }
+    /// First `URLRequest` created on behalf of the `Request`. May not be the first one actually executed.
+    public var firstRequest: URLRequest? { requests.first }
+    /// Last `URLRequest` created on behalf of the `Request`.
+    public var lastRequest: URLRequest? { requests.last }
+    /// Current `URLRequest` created on behalf of the `Request`.
+    public var request: URLRequest? { lastRequest }
+
+    /// `URLRequest`s from all of the `URLSessionTask`s executed on behalf of the `Request`. May be different from
+    /// `requests` due to `URLSession` manipulation.
+    public var performedRequests: [URLRequest] { $mutableState.read { $0.tasks.compactMap { $0.currentRequest } } }
+
+    // MARK: HTTPURLResponse
+
+    /// `HTTPURLResponse` received from the server, if any. If the `Request` was retried, this is the response of the
+    /// last `URLSessionTask`.
+    public var response: HTTPURLResponse? { lastTask?.response as? HTTPURLResponse }
+
+    // MARK: Tasks
+
+    /// All `URLSessionTask`s created on behalf of the `Request`.
+    public var tasks: [URLSessionTask] { mutableState.tasks }
+    /// First `URLSessionTask` created on behalf of the `Request`.
+    public var firstTask: URLSessionTask? { tasks.first }
+    /// Last `URLSessionTask` crated on behalf of the `Request`.
+    public var lastTask: URLSessionTask? { tasks.last }
+    /// Current `URLSessionTask` created on behalf of the `Request`.
+    public var task: URLSessionTask? { lastTask }
+
+    // MARK: Metrics
+
+    /// All `URLSessionTaskMetrics` gathered on behalf of the `Request`. Should correspond to the `tasks` created.
+    public var allMetrics: [URLSessionTaskMetrics] { mutableState.metrics }
+    /// First `URLSessionTaskMetrics` gathered on behalf of the `Request`.
+    public var firstMetrics: URLSessionTaskMetrics? { allMetrics.first }
+    /// Last `URLSessionTaskMetrics` gathered on behalf of the `Request`.
+    public var lastMetrics: URLSessionTaskMetrics? { allMetrics.last }
+    /// Current `URLSessionTaskMetrics` gathered on behalf of the `Request`.
+    public var metrics: URLSessionTaskMetrics? { lastMetrics }
+
+    // MARK: Retry Count
+
+    /// Number of times the `Request` has been retried.
+    public var retryCount: Int { mutableState.retryCount }
+
+    // MARK: Error
+
+    /// `Error` returned from Alamofire internally, from the network request directly, or any validators executed.
+    public fileprivate(set) var error: AFError? {
+        get { mutableState.error }
+        set { mutableState.error = newValue }
+    }
+
+    /// Default initializer for the `Request` superclass.
+    ///
+    /// - Parameters:
+    ///   - id:                 `UUID` used for the `Hashable` and `Equatable` implementations. `UUID()` by default.
+    ///   - underlyingQueue:    `DispatchQueue` on which all internal `Request` work is performed.
+    ///   - serializationQueue: `DispatchQueue` on which all serialization work is performed. By default targets
+    ///                         `underlyingQueue`, but can be passed another queue from a `Session`.
+    ///   - eventMonitor:       `EventMonitor` called for event callbacks from internal `Request` actions.
+    ///   - interceptor:        `RequestInterceptor` used throughout the request lifecycle.
+    ///   - delegate:           `RequestDelegate` that provides an interface to actions not performed by the `Request`.
+    init(id: UUID = UUID(),
+         underlyingQueue: DispatchQueue,
+         serializationQueue: DispatchQueue,
+         eventMonitor: EventMonitor?,
+         interceptor: RequestInterceptor?,
+         delegate: RequestDelegate) {
+        self.id = id
+        self.underlyingQueue = underlyingQueue
+        self.serializationQueue = serializationQueue
+        self.eventMonitor = eventMonitor
+        self.interceptor = interceptor
+        self.delegate = delegate
+    }
+
+    // MARK: - Internal Event API
+
+    // All API must be called from underlyingQueue.
+
+    /// Called when an initial `URLRequest` has been created on behalf of the instance. If a `RequestAdapter` is active,
+    /// the `URLRequest` will be adapted before being issued.
+    ///
+    /// - Parameter request: The `URLRequest` created.
+    func didCreateInitialURLRequest(_ request: URLRequest) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        $mutableState.write { $0.requests.append(request) }
+
+        eventMonitor?.request(self, didCreateInitialURLRequest: request)
+    }
+
+    /// Called when initial `URLRequest` creation has failed, typically through a `URLRequestConvertible`.
+    ///
+    /// - Note: Triggers retry.
+    ///
+    /// - Parameter error: `AFError` thrown from the failed creation.
+    func didFailToCreateURLRequest(with error: AFError) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        self.error = error
+
+        eventMonitor?.request(self, didFailToCreateURLRequestWithError: error)
+
+        callCURLHandlerIfNecessary()
+
+        retryOrFinish(error: error)
+    }
+
+    /// Called when a `RequestAdapter` has successfully adapted a `URLRequest`.
+    ///
+    /// - Parameters:
+    ///   - initialRequest: The `URLRequest` that was adapted.
+    ///   - adaptedRequest: The `URLRequest` returned by the `RequestAdapter`.
+    func didAdaptInitialRequest(_ initialRequest: URLRequest, to adaptedRequest: URLRequest) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        $mutableState.write { $0.requests.append(adaptedRequest) }
+
+        eventMonitor?.request(self, didAdaptInitialRequest: initialRequest, to: adaptedRequest)
+    }
+
+    /// Called when a `RequestAdapter` fails to adapt a `URLRequest`.
+    ///
+    /// - Note: Triggers retry.
+    ///
+    /// - Parameters:
+    ///   - request: The `URLRequest` the adapter was called with.
+    ///   - error:   The `AFError` returned by the `RequestAdapter`.
+    func didFailToAdaptURLRequest(_ request: URLRequest, withError error: AFError) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        self.error = error
+
+        eventMonitor?.request(self, didFailToAdaptURLRequest: request, withError: error)
+
+        callCURLHandlerIfNecessary()
+
+        retryOrFinish(error: error)
+    }
+
+    /// Final `URLRequest` has been created for the instance.
+    ///
+    /// - Parameter request: The `URLRequest` created.
+    func didCreateURLRequest(_ request: URLRequest) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        $mutableState.read { state in
+            state.urlRequestHandler?.queue.async { state.urlRequestHandler?.handler(request) }
+        }
+
+        eventMonitor?.request(self, didCreateURLRequest: request)
+
+        callCURLHandlerIfNecessary()
+    }
+
+    /// Asynchronously calls any stored `cURLHandler` and then removes it from `mutableState`.
+    private func callCURLHandlerIfNecessary() {
+        $mutableState.write { mutableState in
+            guard let cURLHandler = mutableState.cURLHandler else { return }
+
+            cURLHandler.queue.async { cURLHandler.handler(self.cURLDescription()) }
+
+            mutableState.cURLHandler = nil
+        }
+    }
+
+    /// Called when a `URLSessionTask` is created on behalf of the instance.
+    ///
+    /// - Parameter task: The `URLSessionTask` created.
+    func didCreateTask(_ task: URLSessionTask) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        $mutableState.write { state in
+            state.tasks.append(task)
+
+            guard let urlSessionTaskHandler = state.urlSessionTaskHandler else { return }
+
+            urlSessionTaskHandler.queue.async { urlSessionTaskHandler.handler(task) }
+        }
+
+        eventMonitor?.request(self, didCreateTask: task)
+    }
+
+    /// Called when resumption is completed.
+    func didResume() {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        eventMonitor?.requestDidResume(self)
+    }
+
+    /// Called when a `URLSessionTask` is resumed on behalf of the instance.
+    ///
+    /// - Parameter task: The `URLSessionTask` resumed.
+    func didResumeTask(_ task: URLSessionTask) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        eventMonitor?.request(self, didResumeTask: task)
+    }
+
+    /// Called when suspension is completed.
+    func didSuspend() {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        eventMonitor?.requestDidSuspend(self)
+    }
+
+    /// Called when a `URLSessionTask` is suspended on behalf of the instance.
+    ///
+    /// - Parameter task: The `URLSessionTask` suspended.
+    func didSuspendTask(_ task: URLSessionTask) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        eventMonitor?.request(self, didSuspendTask: task)
+    }
+
+    /// Called when cancellation is completed, sets `error` to `AFError.explicitlyCancelled`.
+    func didCancel() {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        error = error ?? AFError.explicitlyCancelled
+
+        eventMonitor?.requestDidCancel(self)
+    }
+
+    /// Called when a `URLSessionTask` is cancelled on behalf of the instance.
+    ///
+    /// - Parameter task: The `URLSessionTask` cancelled.
+    func didCancelTask(_ task: URLSessionTask) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        eventMonitor?.request(self, didCancelTask: task)
+    }
+
+    /// Called when a `URLSessionTaskMetrics` value is gathered on behalf of the instance.
+    ///
+    /// - Parameter metrics: The `URLSessionTaskMetrics` gathered.
+    func didGatherMetrics(_ metrics: URLSessionTaskMetrics) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        $mutableState.write { $0.metrics.append(metrics) }
+
+        eventMonitor?.request(self, didGatherMetrics: metrics)
+    }
+
+    /// Called when a `URLSessionTask` fails before it is finished, typically during certificate pinning.
+    ///
+    /// - Parameters:
+    ///   - task:  The `URLSessionTask` which failed.
+    ///   - error: The early failure `AFError`.
+    func didFailTask(_ task: URLSessionTask, earlyWithError error: AFError) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        self.error = error
+
+        // Task will still complete, so didCompleteTask(_:with:) will handle retry.
+        eventMonitor?.request(self, didFailTask: task, earlyWithError: error)
+    }
+
+    /// Called when a `URLSessionTask` completes. All tasks will eventually call this method.
+    ///
+    /// - Note: Response validation is synchronously triggered in this step.
+    ///
+    /// - Parameters:
+    ///   - task:  The `URLSessionTask` which completed.
+    ///   - error: The `AFError` `task` may have completed with. If `error` has already been set on the instance, this
+    ///            value is ignored.
+    func didCompleteTask(_ task: URLSessionTask, with error: AFError?) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        self.error = self.error ?? error
+
+        validators.forEach { $0() }
+
+        eventMonitor?.request(self, didCompleteTask: task, with: error)
+
+        retryOrFinish(error: self.error)
+    }
+
+    /// Called when the `RequestDelegate` is going to retry this `Request`. Calls `reset()`.
+    func prepareForRetry() {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        $mutableState.write { $0.retryCount += 1 }
+
+        reset()
+
+        eventMonitor?.requestIsRetrying(self)
+    }
+
+    /// Called to determine whether retry will be triggered for the particular error, or whether the instance should
+    /// call `finish()`.
+    ///
+    /// - Parameter error: The possible `AFError` which may trigger retry.
+    func retryOrFinish(error: AFError?) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        guard let error = error, let delegate = delegate else { finish(); return }
+
+        delegate.retryResult(for: self, dueTo: error) { retryResult in
+            switch retryResult {
+            case .doNotRetry:
+                self.finish()
+            case let .doNotRetryWithError(retryError):
+                self.finish(error: retryError.asAFError(orFailWith: "Received retryError was not already AFError"))
+            case .retry, .retryWithDelay:
+                delegate.retryRequest(self, withDelay: retryResult.delay)
+            }
+        }
+    }
+
+    /// Finishes this `Request` and starts the response serializers.
+    ///
+    /// - Parameter error: The possible `Error` with which the instance will finish.
+    func finish(error: AFError? = nil) {
+        dispatchPrecondition(condition: .onQueue(underlyingQueue))
+
+        guard !mutableState.isFinishing else { return }
+
+        mutableState.isFinishing = true
+
+        if let error = error { self.error = error }
+
+        // Start response handlers
+        processNextResponseSerializer()
+
+        eventMonitor?.requestDidFinish(self)
+    }
+
+    /// Appends the response serialization closure to the instance.
+    ///
+    ///  - Note: This method will also `resume` the instance if `delegate.startImmediately` returns `true`.
+    ///
+    /// - Parameter closure: The closure containing the response serialization call.
+    func appendResponseSerializer(_ closure: @escaping () -> Void) {
+        $mutableState.write { mutableState in
+            mutableState.responseSerializers.append(closure)
+
+            if mutableState.state == .finished {
+                mutableState.state = .resumed
+            }
+
+            if mutableState.responseSerializerProcessingFinished {
+                underlyingQueue.async { self.processNextResponseSerializer() }
+            }
+
+            if mutableState.state.canTransitionTo(.resumed) {
+                underlyingQueue.async { if self.delegate?.startImmediately == true { self.resume() } }
+            }
+        }
+    }
+
+    /// Returns the next response serializer closure to execute if there's one left.
+    ///
+    /// - Returns: The next response serialization closure, if there is one.
+    func nextResponseSerializer() -> (() -> Void)? {
+        var responseSerializer: (() -> Void)?
+
+        $mutableState.write { mutableState in
+            let responseSerializerIndex = mutableState.responseSerializerCompletions.count
+
+            if responseSerializerIndex < mutableState.responseSerializers.count {
+                responseSerializer = mutableState.responseSerializers[responseSerializerIndex]
+            }
+        }
+
+        return responseSerializer
+    }
+
+    /// Processes the next response serializer and calls all completions if response serialization is complete.
+    func processNextResponseSerializer() {
+        guard let responseSerializer = nextResponseSerializer() else {
+            // Execute all response serializer completions and clear them
+            var completions: [() -> Void] = []
+
+            $mutableState.write { mutableState in
+                completions = mutableState.responseSerializerCompletions
+
+                // Clear out all response serializers and response serializer completions in mutable state since the
+                // request is complete. It's important to do this prior to calling the completion closures in case
+                // the completions call back into the request triggering a re-processing of the response serializers.
+                // An example of how this can happen is by calling cancel inside a response completion closure.
+                mutableState.responseSerializers.removeAll()
+                mutableState.responseSerializerCompletions.removeAll()
+
+                if mutableState.state.canTransitionTo(.finished) {
+                    mutableState.state = .finished
+                }
+
+                mutableState.responseSerializerProcessingFinished = true
+                mutableState.isFinishing = false
+            }
+
+            completions.forEach { $0() }
+
+            // Cleanup the request
+            cleanup()
+
+            return
+        }
+
+        serializationQueue.async { responseSerializer() }
+    }
+
+    /// Notifies the `Request` that the response serializer is complete.
+    ///
+    /// - Parameter completion: The completion handler provided with the response serializer, called when all serializers
+    ///                         are complete.
+    func responseSerializerDidComplete(completion: @escaping () -> Void) {
+        $mutableState.write { $0.responseSerializerCompletions.append(completion) }
+        processNextResponseSerializer()
+    }
+
+    /// Resets all task and response serializer related state for retry.
+    func reset() {
+        error = nil
+
+        uploadProgress.totalUnitCount = 0
+        uploadProgress.completedUnitCount = 0
+        downloadProgress.totalUnitCount = 0
+        downloadProgress.completedUnitCount = 0
+
+        $mutableState.write { state in
+            state.isFinishing = false
+            state.responseSerializerCompletions = []
+        }
+    }
+
+    /// Called when updating the upload progress.
+    ///
+    /// - Parameters:
+    ///   - totalBytesSent: Total bytes sent so far.
+    ///   - totalBytesExpectedToSend: Total bytes expected to send.
+    func updateUploadProgress(totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
+        uploadProgress.totalUnitCount = totalBytesExpectedToSend
+        uploadProgress.completedUnitCount = totalBytesSent
+
+        uploadProgressHandler?.queue.async { self.uploadProgressHandler?.handler(self.uploadProgress) }
+    }
+
+    /// Perform a closure on the current `state` while locked.
+    ///
+    /// - Parameter perform: The closure to perform.
+    func withState(perform: (State) -> Void) {
+        $mutableState.withState(perform: perform)
+    }
+
+    // MARK: Task Creation
+
+    /// Called when creating a `URLSessionTask` for this `Request`. Subclasses must override.
+    ///
+    /// - Parameters:
+    ///   - request: `URLRequest` to use to create the `URLSessionTask`.
+    ///   - session: `URLSession` which creates the `URLSessionTask`.
+    ///
+    /// - Returns:   The `URLSessionTask` created.
+    func task(for request: URLRequest, using session: URLSession) -> URLSessionTask {
+        fatalError("Subclasses must override.")
+    }
+
+    // MARK: - Public API
+
+    // These APIs are callable from any queue.
+
+    // MARK: State
+
+    /// Cancels the instance. Once cancelled, a `Request` can no longer be resumed or suspended.
+    ///
+    /// - Returns: The instance.
+    @discardableResult
+    public func cancel() -> Self {
+        $mutableState.write { mutableState in
+            guard mutableState.state.canTransitionTo(.cancelled) else { return }
+
+            mutableState.state = .cancelled
+
+            underlyingQueue.async { self.didCancel() }
+
+            guard let task = mutableState.tasks.last, task.state != .completed else {
+                underlyingQueue.async { self.finish() }
+                return
+            }
+
+            // Resume to ensure metrics are gathered.
+            task.resume()
+            task.cancel()
+            underlyingQueue.async { self.didCancelTask(task) }
+        }
+
+        return self
+    }
+
+    /// Suspends the instance.
+    ///
+    /// - Returns: The instance.
+    @discardableResult
+    public func suspend() -> Self {
+        $mutableState.write { mutableState in
+            guard mutableState.state.canTransitionTo(.suspended) else { return }
+
+            mutableState.state = .suspended
+
+            underlyingQueue.async { self.didSuspend() }
+
+            guard let task = mutableState.tasks.last, task.state != .completed else { return }
+
+            task.suspend()
+            underlyingQueue.async { self.didSuspendTask(task) }
+        }
+
+        return self
+    }
+
+    /// Resumes the instance.
+    ///
+    /// - Returns: The instance.
+    @discardableResult
+    public func resume() -> Self {
+        $mutableState.write { mutableState in
+            guard mutableState.state.canTransitionTo(.resumed) else { return }
+
+            mutableState.state = .resumed
+
+            underlyingQueue.async { self.didResume() }
+
+            guard let task = mutableState.tasks.last, task.state != .completed else { return }
+
+            task.resume()
+            underlyingQueue.async { self.didResumeTask(task) }
+        }
+
+        return self
+    }
+
+    // MARK: - Closure API
+
+    /// Associates a credential using the provided values with the instance.
+    ///
+    /// - Parameters:
+    ///   - username:    The username.
+    ///   - password:    The password.
+    ///   - persistence: The `URLCredential.Persistence` for the created `URLCredential`. `.forSession` by default.
+    ///
+    /// - Returns:       The instance.
+    @discardableResult
+    public func authenticate(username: String, password: String, persistence: URLCredential.Persistence = .forSession) -> Self {
+        let credential = URLCredential(user: username, password: password, persistence: persistence)
+
+        return authenticate(with: credential)
+    }
+
+    /// Associates the provided credential with the instance.
+    ///
+    /// - Parameter credential: The `URLCredential`.
+    ///
+    /// - Returns:              The instance.
+    @discardableResult
+    public func authenticate(with credential: URLCredential) -> Self {
+        mutableState.credential = credential
+
+        return self
+    }
+
+    /// Sets a closure to be called periodically during the lifecycle of the instance as data is read from the server.
+    ///
+    /// - Note: Only the last closure provided is used.
+    ///
+    /// - Parameters:
+    ///   - queue:   The `DispatchQueue` to execute the closure on. `.main` by default.
+    ///   - closure: The closure to be executed periodically as data is read from the server.
+    ///
+    /// - Returns:   The instance.
+    @discardableResult
+    public func downloadProgress(queue: DispatchQueue = .main, closure: @escaping ProgressHandler) -> Self {
+        mutableState.downloadProgressHandler = (handler: closure, queue: queue)
+
+        return self
+    }
+
+    /// Sets a closure to be called periodically during the lifecycle of the instance as data is sent to the server.
+    ///
+    /// - Note: Only the last closure provided is used.
+    ///
+    /// - Parameters:
+    ///   - queue:   The `DispatchQueue` to execute the closure on. `.main` by default.
+    ///   - closure: The closure to be executed periodically as data is sent to the server.
+    ///
+    /// - Returns:   The instance.
+    @discardableResult
+    public func uploadProgress(queue: DispatchQueue = .main, closure: @escaping ProgressHandler) -> Self {
+        mutableState.uploadProgressHandler = (handler: closure, queue: queue)
+
+        return self
+    }
+
+    // MARK: Redirects
+
+    /// Sets the redirect handler for the instance which will be used if a redirect response is encountered.
+    ///
+    /// - Note: Attempting to set the redirect handler more than once is a logic error and will crash.
+    ///
+    /// - Parameter handler: The `RedirectHandler`.
+    ///
+    /// - Returns:           The instance.
+    @discardableResult
+    public func redirect(using handler: RedirectHandler) -> Self {
+        $mutableState.write { mutableState in
+            precondition(mutableState.redirectHandler == nil, "Redirect handler has already been set.")
+            mutableState.redirectHandler = handler
+        }
+
+        return self
+    }
+
+    // MARK: Cached Responses
+
+    /// Sets the cached response handler for the `Request` which will be used when attempting to cache a response.
+    ///
+    /// - Note: Attempting to set the cache handler more than once is a logic error and will crash.
+    ///
+    /// - Parameter handler: The `CachedResponseHandler`.
+    ///
+    /// - Returns:           The instance.
+    @discardableResult
+    public func cacheResponse(using handler: CachedResponseHandler) -> Self {
+        $mutableState.write { mutableState in
+            precondition(mutableState.cachedResponseHandler == nil, "Cached response handler has already been set.")
+            mutableState.cachedResponseHandler = handler
+        }
+
+        return self
+    }
+
+    // MARK: - Lifetime APIs
+
+    /// Sets a handler to be called when the cURL description of the request is available.
+    ///
+    /// - Note: When waiting for a `Request`'s `URLRequest` to be created, only the last `handler` will be called.
+    ///
+    /// - Parameters:
+    ///   - queue:   `DispatchQueue` on which `handler` will be called.
+    ///   - handler: Closure to be called when the cURL description is available.
+    ///
+    /// - Returns:           The instance.
+    @discardableResult
+    public func cURLDescription(on queue: DispatchQueue, calling handler: @escaping (String) -> Void) -> Self {
+        $mutableState.write { mutableState in
+            if mutableState.requests.last != nil {
+                queue.async { handler(self.cURLDescription()) }
+            } else {
+                mutableState.cURLHandler = (queue, handler)
+            }
+        }
+
+        return self
+    }
+
+    /// Sets a handler to be called when the cURL description of the request is available.
+    ///
+    /// - Note: When waiting for a `Request`'s `URLRequest` to be created, only the last `handler` will be called.
+    ///
+    /// - Parameter handler: Closure to be called when the cURL description is available. Called on the instance's
+    ///                      `underlyingQueue` by default.
+    ///
+    /// - Returns:           The instance.
+    @discardableResult
+    public func cURLDescription(calling handler: @escaping (String) -> Void) -> Self {
+        $mutableState.write { mutableState in
+            if mutableState.requests.last != nil {
+                underlyingQueue.async { handler(self.cURLDescription()) }
+            } else {
+                mutableState.cURLHandler = (underlyingQueue, handler)
+            }
+        }
+
+        return self
+    }
+
+    /// Sets a closure to called whenever Alamofire creates a `URLRequest` for this instance.
+    ///
+    /// - Note: This closure will be called multiple times if the instance adapts incoming `URLRequest`s or is retried.
+    ///
+    /// - Parameters:
+    ///   - queue:   `DispatchQueue` on which `handler` will be called. `.main` by default.
+    ///   - handler: Closure to be called when a `URLRequest` is available.
+    ///
+    /// - Returns:   The instance.
+    @discardableResult
+    public func onURLRequestCreation(on queue: DispatchQueue = .main, perform handler: @escaping (URLRequest) -> Void) -> Self {
+        $mutableState.write { state in
+            if let request = state.requests.last {
+                queue.async { handler(request) }
+            }
+
+            state.urlRequestHandler = (queue, handler)
+        }
+
+        return self
+    }
+
+    /// Sets a closure to be called whenever the instance creates a `URLSessionTask`.
+    ///
+    /// - Note: This API should only be used to provide `URLSessionTask`s to existing API, like `NSFileProvider`. It
+    ///         **SHOULD NOT** be used to interact with tasks directly, as that may be break Alamofire features.
+    ///         Additionally, this closure may be called multiple times if the instance is retried.
+    ///
+    /// - Parameters:
+    ///   - queue:   `DispatchQueue` on which `handler` will be called. `.main` by default.
+    ///   - handler: Closure to be called when the `URLSessionTask` is available.
+    ///
+    /// - Returns:   The instance.
+    @discardableResult
+    public func onURLSessionTaskCreation(on queue: DispatchQueue = .main, perform handler: @escaping (URLSessionTask) -> Void) -> Self {
+        $mutableState.write { state in
+            if let task = state.tasks.last {
+                queue.async { handler(task) }
+            }
+
+            state.urlSessionTaskHandler = (queue, handler)
+        }
+
+        return self
+    }
+
+    // MARK: Cleanup
+
+    /// Final cleanup step executed when the instance finishes response serialization.
+    func cleanup() {
+        delegate?.cleanup(after: self)
+        // No-op: override in subclass
+    }
+}
+
+// MARK: - Protocol Conformances
+
+extension Request: Equatable {
+    public static func ==(lhs: Request, rhs: Request) -> Bool {
+        lhs.id == rhs.id
+    }
+}
+
+extension Request: Hashable {
+    public func hash(into hasher: inout Hasher) {
+        hasher.combine(id)
+    }
+}
+
+extension Request: CustomStringConvertible {
+    /// A textual representation of this instance, including the `HTTPMethod` and `URL` if the `URLRequest` has been
+    /// created, as well as the response status code, if a response has been received.
+    public var description: String {
+        guard let request = performedRequests.last ?? lastRequest,
+              let url = request.url,
+              let method = request.httpMethod else { return "No request created yet." }
+
+        let requestDescription = "\(method) \(url.absoluteString)"
+
+        return response.map { "\(requestDescription) (\($0.statusCode))" } ?? requestDescription
+    }
+}
+
+extension Request {
+    /// cURL representation of the instance.
+    ///
+    /// - Returns: The cURL equivalent of the instance.
+    public func cURLDescription() -> String {
+        guard
+            let request = lastRequest,
+            let url = request.url,
+            let host = url.host,
+            let method = request.httpMethod else { return "$ curl command could not be created" }
+
+        var components = ["$ curl -v"]
+
+        components.append("-X \(method)")
+
+        if let credentialStorage = delegate?.sessionConfiguration.urlCredentialStorage {
+            let protectionSpace = URLProtectionSpace(host: host,
+                                                     port: url.port ?? 0,
+                                                     protocol: url.scheme,
+                                                     realm: host,
+                                                     authenticationMethod: NSURLAuthenticationMethodHTTPBasic)
+
+            if let credentials = credentialStorage.credentials(for: protectionSpace)?.values {
+                for credential in credentials {
+                    guard let user = credential.user, let password = credential.password else { continue }
+                    components.append("-u \(user):\(password)")
+                }
+            } else {
+                if let credential = credential, let user = credential.user, let password = credential.password {
+                    components.append("-u \(user):\(password)")
+                }
+            }
+        }
+
+        if let configuration = delegate?.sessionConfiguration, configuration.httpShouldSetCookies {
+            if
+                let cookieStorage = configuration.httpCookieStorage,
+                let cookies = cookieStorage.cookies(for: url), !cookies.isEmpty {
+                let allCookies = cookies.map { "\($0.name)=\($0.value)" }.joined(separator: ";")
+
+                components.append("-b \"\(allCookies)\"")
+            }
+        }
+
+        var headers = HTTPHeaders()
+
+        if let sessionHeaders = delegate?.sessionConfiguration.headers {
+            for header in sessionHeaders where header.name != "Cookie" {
+                headers[header.name] = header.value
+            }
+        }
+
+        for header in request.headers where header.name != "Cookie" {
+            headers[header.name] = header.value
+        }
+
+        for header in headers {
+            let escapedValue = header.value.replacingOccurrences(of: "\"", with: "\\\"")
+            components.append("-H \"\(header.name): \(escapedValue)\"")
+        }
+
+        if let httpBodyData = request.httpBody {
+            let httpBody = String(decoding: httpBodyData, as: UTF8.self)
+            var escapedBody = httpBody.replacingOccurrences(of: "\\\"", with: "\\\\\"")
+            escapedBody = escapedBody.replacingOccurrences(of: "\"", with: "\\\"")
+
+            components.append("-d \"\(escapedBody)\"")
+        }
+
+        components.append("\"\(url.absoluteString)\"")
+
+        return components.joined(separator: " \\\n\t")
+    }
+}
+
+/// Protocol abstraction for `Request`'s communication back to the `SessionDelegate`.
+public protocol RequestDelegate: AnyObject {
+    /// `URLSessionConfiguration` used to create the underlying `URLSessionTask`s.
+    var sessionConfiguration: URLSessionConfiguration { get }
+
+    /// Determines whether the `Request` should automatically call `resume()` when adding the first response handler.
+    var startImmediately: Bool { get }
+
+    /// Notifies the delegate the `Request` has reached a point where it needs cleanup.
+    ///
+    /// - Parameter request: The `Request` to cleanup after.
+    func cleanup(after request: Request)
+
+    /// Asynchronously ask the delegate whether a `Request` will be retried.
+    ///
+    /// - Parameters:
+    ///   - request:    `Request` which failed.
+    ///   - error:      `Error` which produced the failure.
+    ///   - completion: Closure taking the `RetryResult` for evaluation.
+    func retryResult(for request: Request, dueTo error: AFError, completion: @escaping (RetryResult) -> Void)
+
+    /// Asynchronously retry the `Request`.
+    ///
+    /// - Parameters:
+    ///   - request:   `Request` which will be retried.
+    ///   - timeDelay: `TimeInterval` after which the retry will be triggered.
+    func retryRequest(_ request: Request, withDelay timeDelay: TimeInterval?)
+}
+
+// MARK: - Subclasses
+
+// MARK: - DataRequest
+
+/// `Request` subclass which handles in-memory `Data` download using `URLSessionDataTask`.
+public class DataRequest: Request {
+    /// `URLRequestConvertible` value used to create `URLRequest`s for this instance.
+    public let convertible: URLRequestConvertible
+    /// `Data` read from the server so far.
+    public var data: Data? { mutableData }
+
+    /// Protected storage for the `Data` read by the instance.
+    @Protected
+    private var mutableData: Data? = nil
+
+    /// Creates a `DataRequest` using the provided parameters.
+    ///
+    /// - Parameters:
+    ///   - id:                 `UUID` used for the `Hashable` and `Equatable` implementations. `UUID()` by default.
+    ///   - convertible:        `URLRequestConvertible` value used to create `URLRequest`s for this instance.
+    ///   - underlyingQueue:    `DispatchQueue` on which all internal `Request` work is performed.
+    ///   - serializationQueue: `DispatchQueue` on which all serialization work is performed. By default targets
+    ///                         `underlyingQueue`, but can be passed another queue from a `Session`.
+    ///   - eventMonitor:       `EventMonitor` called for event callbacks from internal `Request` actions.
+    ///   - interceptor:        `RequestInterceptor` used throughout the request lifecycle.
+    ///   - delegate:           `RequestDelegate` that provides an interface to actions not performed by the `Request`.
+    init(id: UUID = UUID(),
+         convertible: URLRequestConvertible,
+         underlyingQueue: DispatchQueue,
+         serializationQueue: DispatchQueue,
+         eventMonitor: EventMonitor?,
+         interceptor: RequestInterceptor?,
+         delegate: RequestDelegate) {
+        self.convertible = convertible
+
+        super.init(id: id,
+                   underlyingQueue: underlyingQueue,
+                   serializationQueue: serializationQueue,
+                   eventMonitor: eventMonitor,
+                   interceptor: interceptor,
+                   delegate: delegate)
+    }
+
+    override func reset() {
+        super.reset()
+
+        mutableData = nil
+    }
+
+    /// Called when `Data` is received by this instance.
+    ///
+    /// - Note: Also calls `updateDownloadProgress`.
+    ///
+    /// - Parameter data: The `Data` received.
+    func didReceive(data: Data) {
+        if self.data == nil {
+            mutableData = data
+        } else {
+            $mutableData.write { $0?.append(data) }
+        }
+
+        updateDownloadProgress()
+    }
+
+    override func task(for request: URLRequest, using session: URLSession) -> URLSessionTask {
+        let copiedRequest = request
+        return session.dataTask(with: copiedRequest)
+    }
+
+    /// Called to updated the `downloadProgress` of the instance.
+    func updateDownloadProgress() {
+        let totalBytesReceived = Int64(data?.count ?? 0)
+        let totalBytesExpected = task?.response?.expectedContentLength ?? NSURLSessionTransferSizeUnknown
+
+        downloadProgress.totalUnitCount = totalBytesExpected
+        downloadProgress.completedUnitCount = totalBytesReceived
+
+        downloadProgressHandler?.queue.async { self.downloadProgressHandler?.handler(self.downloadProgress) }
+    }
+
+    /// Validates the request, using the specified closure.
+    ///
+    /// - Note: If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - Parameter validation: `Validation` closure used to validate the response.
+    ///
+    /// - Returns:              The instance.
+    @discardableResult
+    public func validate(_ validation: @escaping Validation) -> Self {
+        let validator: () -> Void = { [unowned self] in
+            guard self.error == nil, let response = self.response else { return }
+
+            let result = validation(self.request, response, self.data)
+
+            if case let .failure(error) = result { self.error = error.asAFError(or: .responseValidationFailed(reason: .customValidationFailed(error: error))) }
+
+            self.eventMonitor?.request(self,
+                                       didValidateRequest: self.request,
+                                       response: response,
+                                       data: self.data,
+                                       withResult: result)
+        }
+
+        $validators.write { $0.append(validator) }
+
+        return self
+    }
+}
+
+// MARK: - DataStreamRequest
+
+/// `Request` subclass which streams HTTP response `Data` through a `Handler` closure.
+public final class DataStreamRequest: Request {
+    /// Closure type handling `DataStreamRequest.Stream` values.
+    public typealias Handler<Success, Failure: Error> = (Stream<Success, Failure>) throws -> Void
+
+    /// Type encapsulating an `Event` as it flows through the stream, as well as a `CancellationToken` which can be used
+    /// to stop the stream at any time.
+    public struct Stream<Success, Failure: Error> {
+        /// Latest `Event` from the stream.
+        public let event: Event<Success, Failure>
+        /// Token used to cancel the stream.
+        public let token: CancellationToken
+
+        /// Cancel the ongoing stream by canceling the underlying `DataStreamRequest`.
+        public func cancel() {
+            token.cancel()
+        }
+    }
+
+    /// Type representing an event flowing through the stream. Contains either the `Result` of processing streamed
+    /// `Data` or the completion of the stream.
+    public enum Event<Success, Failure: Error> {
+        /// Output produced every time the instance receives additional `Data`. The associated value contains the
+        /// `Result` of processing the incoming `Data`.
+        case stream(Result<Success, Failure>)
+        /// Output produced when the instance has completed, whether due to stream end, cancellation, or an error.
+        /// Associated `Completion` value contains the final state.
+        case complete(Completion)
+    }
+
+    /// Value containing the state of a `DataStreamRequest` when the stream was completed.
+    public struct Completion {
+        /// Last `URLRequest` issued by the instance.
+        public let request: URLRequest?
+        /// Last `HTTPURLResponse` received by the instance.
+        public let response: HTTPURLResponse?
+        /// Last `URLSessionTaskMetrics` produced for the instance.
+        public let metrics: URLSessionTaskMetrics?
+        /// `AFError` produced for the instance, if any.
+        public let error: AFError?
+    }
+
+    /// Type used to cancel an ongoing stream.
+    public struct CancellationToken {
+        weak var request: DataStreamRequest?
+
+        init(_ request: DataStreamRequest) {
+            self.request = request
+        }
+
+        /// Cancel the ongoing stream by canceling the underlying `DataStreamRequest`.
+        public func cancel() {
+            request?.cancel()
+        }
+    }
+
+    /// `URLRequestConvertible` value used to create `URLRequest`s for this instance.
+    public let convertible: URLRequestConvertible
+    /// Whether or not the instance will be cancelled if stream parsing encounters an error.
+    public let automaticallyCancelOnStreamError: Bool
+
+    /// Internal mutable state specific to this type.
+    struct StreamMutableState {
+        /// `OutputStream` bound to the `InputStream` produced by `asInputStream`, if it has been called.
+        var outputStream: OutputStream?
+        /// Stream closures called as `Data` is received.
+        var streams: [(_ data: Data) -> Void] = []
+        /// Number of currently executing streams. Used to ensure completions are only fired after all streams are
+        /// enqueued.
+        var numberOfExecutingStreams = 0
+        /// Completion calls enqueued while streams are still executing.
+        var enqueuedCompletionEvents: [() -> Void] = []
+    }
+
+    @Protected
+    var streamMutableState = StreamMutableState()
+
+    /// Creates a `DataStreamRequest` using the provided parameters.
+    ///
+    /// - Parameters:
+    ///   - id:                               `UUID` used for the `Hashable` and `Equatable` implementations. `UUID()`
+    ///                                        by default.
+    ///   - convertible:                      `URLRequestConvertible` value used to create `URLRequest`s for this
+    ///                                        instance.
+    ///   - automaticallyCancelOnStreamError: `Bool` indicating whether the instance will be cancelled when an `Error`
+    ///                                       is thrown while serializing stream `Data`.
+    ///   - underlyingQueue:                  `DispatchQueue` on which all internal `Request` work is performed.
+    ///   - serializationQueue:               `DispatchQueue` on which all serialization work is performed. By default
+    ///                                       targets
+    ///                                       `underlyingQueue`, but can be passed another queue from a `Session`.
+    ///   - eventMonitor:                     `EventMonitor` called for event callbacks from internal `Request` actions.
+    ///   - interceptor:                      `RequestInterceptor` used throughout the request lifecycle.
+    ///   - delegate:                         `RequestDelegate` that provides an interface to actions not performed by
+    ///                                       the `Request`.
+    init(id: UUID = UUID(),
+         convertible: URLRequestConvertible,
+         automaticallyCancelOnStreamError: Bool,
+         underlyingQueue: DispatchQueue,
+         serializationQueue: DispatchQueue,
+         eventMonitor: EventMonitor?,
+         interceptor: RequestInterceptor?,
+         delegate: RequestDelegate) {
+        self.convertible = convertible
+        self.automaticallyCancelOnStreamError = automaticallyCancelOnStreamError
+
+        super.init(id: id,
+                   underlyingQueue: underlyingQueue,
+                   serializationQueue: serializationQueue,
+                   eventMonitor: eventMonitor,
+                   interceptor: interceptor,
+                   delegate: delegate)
+    }
+
+    override func task(for request: URLRequest, using session: URLSession) -> URLSessionTask {
+        let copiedRequest = request
+        return session.dataTask(with: copiedRequest)
+    }
+
+    override func finish(error: AFError? = nil) {
+        $streamMutableState.write { state in
+            state.outputStream?.close()
+        }
+
+        super.finish(error: error)
+    }
+
+    func didReceive(data: Data) {
+        $streamMutableState.write { state in
+            if let stream = state.outputStream {
+                underlyingQueue.async {
+                    var bytes = Array(data)
+                    stream.write(&bytes, maxLength: bytes.count)
+                }
+            }
+            state.numberOfExecutingStreams += state.streams.count
+            let localState = state
+            underlyingQueue.async { localState.streams.forEach { $0(data) } }
+        }
+    }
+
+    /// Validates the `URLRequest` and `HTTPURLResponse` received for the instance using the provided `Validation` closure.
+    ///
+    /// - Parameter validation: `Validation` closure used to validate the request and response.
+    ///
+    /// - Returns:              The `DataStreamRequest`.
+    @discardableResult
+    public func validate(_ validation: @escaping Validation) -> Self {
+        let validator: () -> Void = { [unowned self] in
+            guard self.error == nil, let response = self.response else { return }
+
+            let result = validation(self.request, response)
+
+            if case let .failure(error) = result {
+                self.error = error.asAFError(or: .responseValidationFailed(reason: .customValidationFailed(error: error)))
+            }
+
+            self.eventMonitor?.request(self,
+                                       didValidateRequest: self.request,
+                                       response: response,
+                                       withResult: result)
+        }
+
+        $validators.write { $0.append(validator) }
+
+        return self
+    }
+
+    /// Produces an `InputStream` that receives the `Data` received by the instance.
+    ///
+    /// - Note: The `InputStream` produced by this method must have `open()` called before being able to read `Data`.
+    ///         Additionally, this method will automatically call `resume()` on the instance, regardless of whether or
+    ///         not the creating session has `startRequestsImmediately` set to `true`.
+    ///
+    /// - Parameter bufferSize: Size, in bytes, of the buffer between the `OutputStream` and `InputStream`.
+    ///
+    /// - Returns:              The `InputStream` bound to the internal `OutboundStream`.
+    public func asInputStream(bufferSize: Int = 1024) -> InputStream? {
+        defer { resume() }
+
+        var inputStream: InputStream?
+        $streamMutableState.write { state in
+            Foundation.Stream.getBoundStreams(withBufferSize: bufferSize,
+                                              inputStream: &inputStream,
+                                              outputStream: &state.outputStream)
+            state.outputStream?.open()
+        }
+
+        return inputStream
+    }
+
+    func capturingError(from closure: () throws -> Void) {
+        do {
+            try closure()
+        } catch {
+            self.error = error.asAFError(or: .responseSerializationFailed(reason: .customSerializationFailed(error: error)))
+            cancel()
+        }
+    }
+
+    func appendStreamCompletion<Success, Failure>(on queue: DispatchQueue,
+                                                  stream: @escaping Handler<Success, Failure>) {
+        appendResponseSerializer {
+            self.underlyingQueue.async {
+                self.responseSerializerDidComplete {
+                    self.$streamMutableState.write { state in
+                        guard state.numberOfExecutingStreams == 0 else {
+                            state.enqueuedCompletionEvents.append {
+                                self.enqueueCompletion(on: queue, stream: stream)
+                            }
+
+                            return
+                        }
+
+                        self.enqueueCompletion(on: queue, stream: stream)
+                    }
+                }
+            }
+        }
+    }
+
+    func enqueueCompletion<Success, Failure>(on queue: DispatchQueue,
+                                             stream: @escaping Handler<Success, Failure>) {
+        queue.async {
+            do {
+                let completion = Completion(request: self.request,
+                                            response: self.response,
+                                            metrics: self.metrics,
+                                            error: self.error)
+                try stream(.init(event: .complete(completion), token: .init(self)))
+            } catch {
+                // Ignore error, as errors on Completion can't be handled anyway.
+            }
+        }
+    }
+}
+
+extension DataStreamRequest.Stream {
+    /// Incoming `Result` values from `Event.stream`.
+    public var result: Result<Success, Failure>? {
+        guard case let .stream(result) = event else { return nil }
+
+        return result
+    }
+
+    /// `Success` value of the instance, if any.
+    public var value: Success? {
+        guard case let .success(value) = result else { return nil }
+
+        return value
+    }
+
+    /// `Failure` value of the instance, if any.
+    public var error: Failure? {
+        guard case let .failure(error) = result else { return nil }
+
+        return error
+    }
+
+    /// `Completion` value of the instance, if any.
+    public var completion: DataStreamRequest.Completion? {
+        guard case let .complete(completion) = event else { return nil }
+
+        return completion
+    }
+}
+
+// MARK: - DownloadRequest
+
+/// `Request` subclass which downloads `Data` to a file on disk using `URLSessionDownloadTask`.
+public class DownloadRequest: Request {
+    /// A set of options to be executed prior to moving a downloaded file from the temporary `URL` to the destination
+    /// `URL`.
+    public struct Options: OptionSet {
+        /// Specifies that intermediate directories for the destination URL should be created.
+        public static let createIntermediateDirectories = Options(rawValue: 1 << 0)
+        /// Specifies that any previous file at the destination `URL` should be removed.
+        public static let removePreviousFile = Options(rawValue: 1 << 1)
+
+        public let rawValue: Int
+
+        public init(rawValue: Int) {
+            self.rawValue = rawValue
+        }
+    }
+
+    // MARK: Destination
+
+    /// A closure executed once a `DownloadRequest` has successfully completed in order to determine where to move the
+    /// temporary file written to during the download process. The closure takes two arguments: the temporary file URL
+    /// and the `HTTPURLResponse`, and returns two values: the file URL where the temporary file should be moved and
+    /// the options defining how the file should be moved.
+    ///
+    /// - Note: Downloads from a local `file://` `URL`s do not use the `Destination` closure, as those downloads do not
+    ///         return an `HTTPURLResponse`. Instead the file is merely moved within the temporary directory.
+    public typealias Destination = (_ temporaryURL: URL,
+                                    _ response: HTTPURLResponse) -> (destinationURL: URL, options: Options)
+
+    /// Creates a download file destination closure which uses the default file manager to move the temporary file to a
+    /// file URL in the first available directory with the specified search path directory and search path domain mask.
+    ///
+    /// - Parameters:
+    ///   - directory: The search path directory. `.documentDirectory` by default.
+    ///   - domain:    The search path domain mask. `.userDomainMask` by default.
+    ///   - options:   `DownloadRequest.Options` used when moving the downloaded file to its destination. None by
+    ///                default.
+    /// - Returns: The `Destination` closure.
+    public class func suggestedDownloadDestination(for directory: FileManager.SearchPathDirectory = .documentDirectory,
+                                                   in domain: FileManager.SearchPathDomainMask = .userDomainMask,
+                                                   options: Options = []) -> Destination {
+        { temporaryURL, response in
+            let directoryURLs = FileManager.default.urls(for: directory, in: domain)
+            let url = directoryURLs.first?.appendingPathComponent(response.suggestedFilename!) ?? temporaryURL
+
+            return (url, options)
+        }
+    }
+
+    /// Default `Destination` used by Alamofire to ensure all downloads persist. This `Destination` prepends
+    /// `Alamofire_` to the automatically generated download name and moves it within the temporary directory. Files
+    /// with this destination must be additionally moved if they should survive the system reclamation of temporary
+    /// space.
+    static let defaultDestination: Destination = { url, _ in
+        (defaultDestinationURL(url), [])
+    }
+
+    /// Default `URL` creation closure. Creates a `URL` in the temporary directory with `Alamofire_` prepended to the
+    /// provided file name.
+    static let defaultDestinationURL: (URL) -> URL = { url in
+        let filename = "Alamofire_\(url.lastPathComponent)"
+        let destination = url.deletingLastPathComponent().appendingPathComponent(filename)
+
+        return destination
+    }
+
+    // MARK: Downloadable
+
+    /// Type describing the source used to create the underlying `URLSessionDownloadTask`.
+    public enum Downloadable {
+        /// Download should be started from the `URLRequest` produced by the associated `URLRequestConvertible` value.
+        case request(URLRequestConvertible)
+        /// Download should be started from the associated resume `Data` value.
+        case resumeData(Data)
+    }
+
+    // MARK: Mutable State
+
+    /// Type containing all mutable state for `DownloadRequest` instances.
+    private struct DownloadRequestMutableState {
+        /// Possible resume `Data` produced when cancelling the instance.
+        var resumeData: Data?
+        /// `URL` to which `Data` is being downloaded.
+        var fileURL: URL?
+    }
+
+    /// Protected mutable state specific to `DownloadRequest`.
+    @Protected
+    private var mutableDownloadState = DownloadRequestMutableState()
+
+    /// If the download is resumable and is eventually cancelled or fails, this value may be used to resume the download
+    /// using the `download(resumingWith data:)` API.
+    ///
+    /// - Note: For more information about `resumeData`, see [Apple's documentation](https://developer.apple.com/documentation/foundation/urlsessiondownloadtask/1411634-cancel).
+    public var resumeData: Data? { mutableDownloadState.resumeData ?? error?.downloadResumeData }
+    /// If the download is successful, the `URL` where the file was downloaded.
+    public var fileURL: URL? { mutableDownloadState.fileURL }
+
+    // MARK: Initial State
+
+    /// `Downloadable` value used for this instance.
+    public let downloadable: Downloadable
+    /// The `Destination` to which the downloaded file is moved.
+    let destination: Destination
+
+    /// Creates a `DownloadRequest` using the provided parameters.
+    ///
+    /// - Parameters:
+    ///   - id:                 `UUID` used for the `Hashable` and `Equatable` implementations. `UUID()` by default.
+    ///   - downloadable:       `Downloadable` value used to create `URLSessionDownloadTasks` for the instance.
+    ///   - underlyingQueue:    `DispatchQueue` on which all internal `Request` work is performed.
+    ///   - serializationQueue: `DispatchQueue` on which all serialization work is performed. By default targets
+    ///                         `underlyingQueue`, but can be passed another queue from a `Session`.
+    ///   - eventMonitor:       `EventMonitor` called for event callbacks from internal `Request` actions.
+    ///   - interceptor:        `RequestInterceptor` used throughout the request lifecycle.
+    ///   - delegate:           `RequestDelegate` that provides an interface to actions not performed by the `Request`
+    ///   - destination:        `Destination` closure used to move the downloaded file to its final location.
+    init(id: UUID = UUID(),
+         downloadable: Downloadable,
+         underlyingQueue: DispatchQueue,
+         serializationQueue: DispatchQueue,
+         eventMonitor: EventMonitor?,
+         interceptor: RequestInterceptor?,
+         delegate: RequestDelegate,
+         destination: @escaping Destination) {
+        self.downloadable = downloadable
+        self.destination = destination
+
+        super.init(id: id,
+                   underlyingQueue: underlyingQueue,
+                   serializationQueue: serializationQueue,
+                   eventMonitor: eventMonitor,
+                   interceptor: interceptor,
+                   delegate: delegate)
+    }
+
+    override func reset() {
+        super.reset()
+
+        $mutableDownloadState.write {
+            $0.resumeData = nil
+            $0.fileURL = nil
+        }
+    }
+
+    /// Called when a download has finished.
+    ///
+    /// - Parameters:
+    ///   - task:   `URLSessionTask` that finished the download.
+    ///   - result: `Result` of the automatic move to `destination`.
+    func didFinishDownloading(using task: URLSessionTask, with result: Result<URL, AFError>) {
+        eventMonitor?.request(self, didFinishDownloadingUsing: task, with: result)
+
+        switch result {
+        case let .success(url): mutableDownloadState.fileURL = url
+        case let .failure(error): self.error = error
+        }
+    }
+
+    /// Updates the `downloadProgress` using the provided values.
+    ///
+    /// - Parameters:
+    ///   - bytesWritten:              Total bytes written so far.
+    ///   - totalBytesExpectedToWrite: Total bytes expected to write.
+    func updateDownloadProgress(bytesWritten: Int64, totalBytesExpectedToWrite: Int64) {
+        downloadProgress.totalUnitCount = totalBytesExpectedToWrite
+        downloadProgress.completedUnitCount += bytesWritten
+
+        downloadProgressHandler?.queue.async { self.downloadProgressHandler?.handler(self.downloadProgress) }
+    }
+
+    override func task(for request: URLRequest, using session: URLSession) -> URLSessionTask {
+        session.downloadTask(with: request)
+    }
+
+    /// Creates a `URLSessionTask` from the provided resume data.
+    ///
+    /// - Parameters:
+    ///   - data:    `Data` used to resume the download.
+    ///   - session: `URLSession` used to create the `URLSessionTask`.
+    ///
+    /// - Returns:   The `URLSessionTask` created.
+    public func task(forResumeData data: Data, using session: URLSession) -> URLSessionTask {
+        session.downloadTask(withResumeData: data)
+    }
+
+    /// Cancels the instance. Once cancelled, a `DownloadRequest` can no longer be resumed or suspended.
+    ///
+    /// - Note: This method will NOT produce resume data. If you wish to cancel and produce resume data, use
+    ///         `cancel(producingResumeData:)` or `cancel(byProducingResumeData:)`.
+    ///
+    /// - Returns: The instance.
+    @discardableResult
+    override public func cancel() -> Self {
+        cancel(producingResumeData: false)
+    }
+
+    /// Cancels the instance, optionally producing resume data. Once cancelled, a `DownloadRequest` can no longer be
+    /// resumed or suspended.
+    ///
+    /// - Note: If `producingResumeData` is `true`, the `resumeData` property will be populated with any resume data, if
+    ///         available.
+    ///
+    /// - Returns: The instance.
+    @discardableResult
+    public func cancel(producingResumeData shouldProduceResumeData: Bool) -> Self {
+        cancel(optionallyProducingResumeData: shouldProduceResumeData ? { _ in } : nil)
+    }
+
+    /// Cancels the instance while producing resume data. Once cancelled, a `DownloadRequest` can no longer be resumed
+    /// or suspended.
+    ///
+    /// - Note: The resume data passed to the completion handler will also be available on the instance's `resumeData`
+    ///         property.
+    ///
+    /// - Parameter completionHandler: The completion handler that is called when the download has been successfully
+    ///                                cancelled. It is not guaranteed to be called on a particular queue, so you may
+    ///                                want use an appropriate queue to perform your work.
+    ///
+    /// - Returns:                     The instance.
+    @discardableResult
+    public func cancel(byProducingResumeData completionHandler: @escaping (_ data: Data?) -> Void) -> Self {
+        cancel(optionallyProducingResumeData: completionHandler)
+    }
+
+    /// Internal implementation of cancellation that optionally takes a resume data handler. If no handler is passed,
+    /// cancellation is performed without producing resume data.
+    ///
+    /// - Parameter completionHandler: Optional resume data handler.
+    ///
+    /// - Returns:                     The instance.
+    private func cancel(optionallyProducingResumeData completionHandler: ((_ resumeData: Data?) -> Void)?) -> Self {
+        $mutableState.write { mutableState in
+            guard mutableState.state.canTransitionTo(.cancelled) else { return }
+
+            mutableState.state = .cancelled
+
+            underlyingQueue.async { self.didCancel() }
+
+            guard let task = mutableState.tasks.last as? URLSessionDownloadTask, task.state != .completed else {
+                underlyingQueue.async { self.finish() }
+                return
+            }
+
+            if let completionHandler = completionHandler {
+                // Resume to ensure metrics are gathered.
+                task.resume()
+                task.cancel { resumeData in
+                    self.mutableDownloadState.resumeData = resumeData
+                    self.underlyingQueue.async { self.didCancelTask(task) }
+                    completionHandler(resumeData)
+                }
+            } else {
+                // Resume to ensure metrics are gathered.
+                task.resume()
+                task.cancel(byProducingResumeData: { _ in })
+                self.underlyingQueue.async { self.didCancelTask(task) }
+            }
+        }
+
+        return self
+    }
+
+    /// Validates the request, using the specified closure.
+    ///
+    /// - Note: If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - Parameter validation: `Validation` closure to validate the response.
+    ///
+    /// - Returns:              The instance.
+    @discardableResult
+    public func validate(_ validation: @escaping Validation) -> Self {
+        let validator: () -> Void = { [unowned self] in
+            guard self.error == nil, let response = self.response else { return }
+
+            let result = validation(self.request, response, self.fileURL)
+
+            if case let .failure(error) = result {
+                self.error = error.asAFError(or: .responseValidationFailed(reason: .customValidationFailed(error: error)))
+            }
+
+            self.eventMonitor?.request(self,
+                                       didValidateRequest: self.request,
+                                       response: response,
+                                       fileURL: self.fileURL,
+                                       withResult: result)
+        }
+
+        $validators.write { $0.append(validator) }
+
+        return self
+    }
+}
+
+// MARK: - UploadRequest
+
+/// `DataRequest` subclass which handles `Data` upload from memory, file, or stream using `URLSessionUploadTask`.
+public class UploadRequest: DataRequest {
+    /// Type describing the origin of the upload, whether `Data`, file, or stream.
+    public enum Uploadable {
+        /// Upload from the provided `Data` value.
+        case data(Data)
+        /// Upload from the provided file `URL`, as well as a `Bool` determining whether the source file should be
+        /// automatically removed once uploaded.
+        case file(URL, shouldRemove: Bool)
+        /// Upload from the provided `InputStream`.
+        case stream(InputStream)
+    }
+
+    // MARK: Initial State
+
+    /// The `UploadableConvertible` value used to produce the `Uploadable` value for this instance.
+    public let upload: UploadableConvertible
+
+    /// `FileManager` used to perform cleanup tasks, including the removal of multipart form encoded payloads written
+    /// to disk.
+    public let fileManager: FileManager
+
+    // MARK: Mutable State
+
+    /// `Uploadable` value used by the instance.
+    public var uploadable: Uploadable?
+
+    /// Creates an `UploadRequest` using the provided parameters.
+    ///
+    /// - Parameters:
+    ///   - id:                 `UUID` used for the `Hashable` and `Equatable` implementations. `UUID()` by default.
+    ///   - convertible:        `UploadConvertible` value used to determine the type of upload to be performed.
+    ///   - underlyingQueue:    `DispatchQueue` on which all internal `Request` work is performed.
+    ///   - serializationQueue: `DispatchQueue` on which all serialization work is performed. By default targets
+    ///                         `underlyingQueue`, but can be passed another queue from a `Session`.
+    ///   - eventMonitor:       `EventMonitor` called for event callbacks from internal `Request` actions.
+    ///   - interceptor:        `RequestInterceptor` used throughout the request lifecycle.
+    ///   - delegate:           `RequestDelegate` that provides an interface to actions not performed by the `Request`.
+    init(id: UUID = UUID(),
+         convertible: UploadConvertible,
+         underlyingQueue: DispatchQueue,
+         serializationQueue: DispatchQueue,
+         eventMonitor: EventMonitor?,
+         interceptor: RequestInterceptor?,
+         fileManager: FileManager,
+         delegate: RequestDelegate) {
+        upload = convertible
+        self.fileManager = fileManager
+
+        super.init(id: id,
+                   convertible: convertible,
+                   underlyingQueue: underlyingQueue,
+                   serializationQueue: serializationQueue,
+                   eventMonitor: eventMonitor,
+                   interceptor: interceptor,
+                   delegate: delegate)
+    }
+
+    /// Called when the `Uploadable` value has been created from the `UploadConvertible`.
+    ///
+    /// - Parameter uploadable: The `Uploadable` that was created.
+    func didCreateUploadable(_ uploadable: Uploadable) {
+        self.uploadable = uploadable
+
+        eventMonitor?.request(self, didCreateUploadable: uploadable)
+    }
+
+    /// Called when the `Uploadable` value could not be created.
+    ///
+    /// - Parameter error: `AFError` produced by the failure.
+    func didFailToCreateUploadable(with error: AFError) {
+        self.error = error
+
+        eventMonitor?.request(self, didFailToCreateUploadableWithError: error)
+
+        retryOrFinish(error: error)
+    }
+
+    override func task(for request: URLRequest, using session: URLSession) -> URLSessionTask {
+        guard let uploadable = uploadable else {
+            fatalError("Attempting to create a URLSessionUploadTask when Uploadable value doesn't exist.")
+        }
+
+        switch uploadable {
+        case let .data(data): return session.uploadTask(with: request, from: data)
+        case let .file(url, _): return session.uploadTask(with: request, fromFile: url)
+        case .stream: return session.uploadTask(withStreamedRequest: request)
+        }
+    }
+
+    override func reset() {
+        // Uploadable must be recreated on every retry.
+        uploadable = nil
+
+        super.reset()
+    }
+
+    /// Produces the `InputStream` from `uploadable`, if it can.
+    ///
+    /// - Note: Calling this method with a non-`.stream` `Uploadable` is a logic error and will crash.
+    ///
+    /// - Returns: The `InputStream`.
+    func inputStream() -> InputStream {
+        guard let uploadable = uploadable else {
+            fatalError("Attempting to access the input stream but the uploadable doesn't exist.")
+        }
+
+        guard case let .stream(stream) = uploadable else {
+            fatalError("Attempted to access the stream of an UploadRequest that wasn't created with one.")
+        }
+
+        eventMonitor?.request(self, didProvideInputStream: stream)
+
+        return stream
+    }
+
+    override public func cleanup() {
+        defer { super.cleanup() }
+
+        guard
+            let uploadable = self.uploadable,
+            case let .file(url, shouldRemove) = uploadable,
+            shouldRemove
+        else { return }
+
+        try? fileManager.removeItem(at: url)
+    }
+}
+
+/// A type that can produce an `UploadRequest.Uploadable` value.
+public protocol UploadableConvertible {
+    /// Produces an `UploadRequest.Uploadable` value from the instance.
+    ///
+    /// - Returns: The `UploadRequest.Uploadable`.
+    /// - Throws:  Any `Error` produced during creation.
+    func createUploadable() throws -> UploadRequest.Uploadable
+}
+
+extension UploadRequest.Uploadable: UploadableConvertible {
+    public func createUploadable() throws -> UploadRequest.Uploadable {
+        self
+    }
+}
+
+/// A type that can be converted to an upload, whether from an `UploadRequest.Uploadable` or `URLRequestConvertible`.
+public protocol UploadConvertible: UploadableConvertible & URLRequestConvertible {}

Pods/Alamofire/Source/RequestInterceptor.swift

@@ -0,0 +1,244 @@
+//
+//  RequestInterceptor.swift
+//
+//  Copyright (c) 2019 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A type that can inspect and optionally adapt a `URLRequest` in some manner if necessary.
+public protocol RequestAdapter {
+    /// Inspects and adapts the specified `URLRequest` in some manner and calls the completion handler with the Result.
+    ///
+    /// - Parameters:
+    ///   - urlRequest: The `URLRequest` to adapt.
+    ///   - session:    The `Session` that will execute the `URLRequest`.
+    ///   - completion: The completion handler that must be called when adaptation is complete.
+    func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void)
+}
+
+// MARK: -
+
+/// Outcome of determination whether retry is necessary.
+public enum RetryResult {
+    /// Retry should be attempted immediately.
+    case retry
+    /// Retry should be attempted after the associated `TimeInterval`.
+    case retryWithDelay(TimeInterval)
+    /// Do not retry.
+    case doNotRetry
+    /// Do not retry due to the associated `Error`.
+    case doNotRetryWithError(Error)
+}
+
+extension RetryResult {
+    var retryRequired: Bool {
+        switch self {
+        case .retry, .retryWithDelay: return true
+        default: return false
+        }
+    }
+
+    var delay: TimeInterval? {
+        switch self {
+        case let .retryWithDelay(delay): return delay
+        default: return nil
+        }
+    }
+
+    var error: Error? {
+        guard case let .doNotRetryWithError(error) = self else { return nil }
+        return error
+    }
+}
+
+/// A type that determines whether a request should be retried after being executed by the specified session manager
+/// and encountering an error.
+public protocol RequestRetrier {
+    /// Determines whether the `Request` should be retried by calling the `completion` closure.
+    ///
+    /// This operation is fully asynchronous. Any amount of time can be taken to determine whether the request needs
+    /// to be retried. The one requirement is that the completion closure is called to ensure the request is properly
+    /// cleaned up after.
+    ///
+    /// - Parameters:
+    ///   - request:    `Request` that failed due to the provided `Error`.
+    ///   - session:    `Session` that produced the `Request`.
+    ///   - error:      `Error` encountered while executing the `Request`.
+    ///   - completion: Completion closure to be executed when a retry decision has been determined.
+    func retry(_ request: Request, for session: Session, dueTo error: Error, completion: @escaping (RetryResult) -> Void)
+}
+
+// MARK: -
+
+/// Type that provides both `RequestAdapter` and `RequestRetrier` functionality.
+public protocol RequestInterceptor: RequestAdapter, RequestRetrier {}
+
+extension RequestInterceptor {
+    public func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void) {
+        completion(.success(urlRequest))
+    }
+
+    public func retry(_ request: Request,
+                      for session: Session,
+                      dueTo error: Error,
+                      completion: @escaping (RetryResult) -> Void) {
+        completion(.doNotRetry)
+    }
+}
+
+/// `RequestAdapter` closure definition.
+public typealias AdaptHandler = (URLRequest, Session, _ completion: @escaping (Result<URLRequest, Error>) -> Void) -> Void
+/// `RequestRetrier` closure definition.
+public typealias RetryHandler = (Request, Session, Error, _ completion: @escaping (RetryResult) -> Void) -> Void
+
+// MARK: -
+
+/// Closure-based `RequestAdapter`.
+open class Adapter: RequestInterceptor {
+    private let adaptHandler: AdaptHandler
+
+    /// Creates an instance using the provided closure.
+    ///
+    /// - Parameter adaptHandler: `AdaptHandler` closure to be executed when handling request adaptation.
+    public init(_ adaptHandler: @escaping AdaptHandler) {
+        self.adaptHandler = adaptHandler
+    }
+
+    open func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void) {
+        adaptHandler(urlRequest, session, completion)
+    }
+}
+
+// MARK: -
+
+/// Closure-based `RequestRetrier`.
+open class Retrier: RequestInterceptor {
+    private let retryHandler: RetryHandler
+
+    /// Creates an instance using the provided closure.
+    ///
+    /// - Parameter retryHandler: `RetryHandler` closure to be executed when handling request retry.
+    public init(_ retryHandler: @escaping RetryHandler) {
+        self.retryHandler = retryHandler
+    }
+
+    open func retry(_ request: Request,
+                    for session: Session,
+                    dueTo error: Error,
+                    completion: @escaping (RetryResult) -> Void) {
+        retryHandler(request, session, error, completion)
+    }
+}
+
+// MARK: -
+
+/// `RequestInterceptor` which can use multiple `RequestAdapter` and `RequestRetrier` values.
+open class Interceptor: RequestInterceptor {
+    /// All `RequestAdapter`s associated with the instance. These adapters will be run until one fails.
+    public let adapters: [RequestAdapter]
+    /// All `RequestRetrier`s associated with the instance. These retriers will be run one at a time until one triggers retry.
+    public let retriers: [RequestRetrier]
+
+    /// Creates an instance from `AdaptHandler` and `RetryHandler` closures.
+    ///
+    /// - Parameters:
+    ///   - adaptHandler: `AdaptHandler` closure to be used.
+    ///   - retryHandler: `RetryHandler` closure to be used.
+    public init(adaptHandler: @escaping AdaptHandler, retryHandler: @escaping RetryHandler) {
+        adapters = [Adapter(adaptHandler)]
+        retriers = [Retrier(retryHandler)]
+    }
+
+    /// Creates an instance from `RequestAdapter` and `RequestRetrier` values.
+    ///
+    /// - Parameters:
+    ///   - adapter: `RequestAdapter` value to be used.
+    ///   - retrier: `RequestRetrier` value to be used.
+    public init(adapter: RequestAdapter, retrier: RequestRetrier) {
+        adapters = [adapter]
+        retriers = [retrier]
+    }
+
+    /// Creates an instance from the arrays of `RequestAdapter` and `RequestRetrier` values.
+    ///
+    /// - Parameters:
+    ///   - adapters:     `RequestAdapter` values to be used.
+    ///   - retriers:     `RequestRetrier` values to be used.
+    ///   - interceptors: `RequestInterceptor`s to be used.
+    public init(adapters: [RequestAdapter] = [], retriers: [RequestRetrier] = [], interceptors: [RequestInterceptor] = []) {
+        self.adapters = adapters + interceptors
+        self.retriers = retriers + interceptors
+    }
+
+    open func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void) {
+        adapt(urlRequest, for: session, using: adapters, completion: completion)
+    }
+
+    private func adapt(_ urlRequest: URLRequest,
+                       for session: Session,
+                       using adapters: [RequestAdapter],
+                       completion: @escaping (Result<URLRequest, Error>) -> Void) {
+        var pendingAdapters = adapters
+
+        guard !pendingAdapters.isEmpty else { completion(.success(urlRequest)); return }
+
+        let adapter = pendingAdapters.removeFirst()
+
+        adapter.adapt(urlRequest, for: session) { result in
+            switch result {
+            case let .success(urlRequest):
+                self.adapt(urlRequest, for: session, using: pendingAdapters, completion: completion)
+            case .failure:
+                completion(result)
+            }
+        }
+    }
+
+    open func retry(_ request: Request,
+                    for session: Session,
+                    dueTo error: Error,
+                    completion: @escaping (RetryResult) -> Void) {
+        retry(request, for: session, dueTo: error, using: retriers, completion: completion)
+    }
+
+    private func retry(_ request: Request,
+                       for session: Session,
+                       dueTo error: Error,
+                       using retriers: [RequestRetrier],
+                       completion: @escaping (RetryResult) -> Void) {
+        var pendingRetriers = retriers
+
+        guard !pendingRetriers.isEmpty else { completion(.doNotRetry); return }
+
+        let retrier = pendingRetriers.removeFirst()
+
+        retrier.retry(request, for: session, dueTo: error) { result in
+            switch result {
+            case .retry, .retryWithDelay, .doNotRetryWithError:
+                completion(result)
+            case .doNotRetry:
+                // Only continue to the next retrier if retry was not triggered and no error was encountered
+                self.retry(request, for: session, dueTo: error, using: pendingRetriers, completion: completion)
+            }
+        }
+    }
+}

Pods/Alamofire/Source/RequestTaskMap.swift

@@ -0,0 +1,149 @@
+//
+//  RequestTaskMap.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A type that maintains a two way, one to one map of `URLSessionTask`s to `Request`s.
+struct RequestTaskMap {
+    private typealias Events = (completed: Bool, metricsGathered: Bool)
+
+    private var tasksToRequests: [URLSessionTask: Request]
+    private var requestsToTasks: [Request: URLSessionTask]
+    private var taskEvents: [URLSessionTask: Events]
+
+    var requests: [Request] {
+        Array(tasksToRequests.values)
+    }
+
+    init(tasksToRequests: [URLSessionTask: Request] = [:],
+         requestsToTasks: [Request: URLSessionTask] = [:],
+         taskEvents: [URLSessionTask: (completed: Bool, metricsGathered: Bool)] = [:]) {
+        self.tasksToRequests = tasksToRequests
+        self.requestsToTasks = requestsToTasks
+        self.taskEvents = taskEvents
+    }
+
+    subscript(_ request: Request) -> URLSessionTask? {
+        get { requestsToTasks[request] }
+        set {
+            guard let newValue = newValue else {
+                guard let task = requestsToTasks[request] else {
+                    fatalError("RequestTaskMap consistency error: no task corresponding to request found.")
+                }
+
+                requestsToTasks.removeValue(forKey: request)
+                tasksToRequests.removeValue(forKey: task)
+                taskEvents.removeValue(forKey: task)
+
+                return
+            }
+
+            requestsToTasks[request] = newValue
+            tasksToRequests[newValue] = request
+            taskEvents[newValue] = (completed: false, metricsGathered: false)
+        }
+    }
+
+    subscript(_ task: URLSessionTask) -> Request? {
+        get { tasksToRequests[task] }
+        set {
+            guard let newValue = newValue else {
+                guard let request = tasksToRequests[task] else {
+                    fatalError("RequestTaskMap consistency error: no request corresponding to task found.")
+                }
+
+                tasksToRequests.removeValue(forKey: task)
+                requestsToTasks.removeValue(forKey: request)
+                taskEvents.removeValue(forKey: task)
+
+                return
+            }
+
+            tasksToRequests[task] = newValue
+            requestsToTasks[newValue] = task
+            taskEvents[task] = (completed: false, metricsGathered: false)
+        }
+    }
+
+    var count: Int {
+        precondition(tasksToRequests.count == requestsToTasks.count,
+                     "RequestTaskMap.count invalid, requests.count: \(tasksToRequests.count) != tasks.count: \(requestsToTasks.count)")
+
+        return tasksToRequests.count
+    }
+
+    var eventCount: Int {
+        precondition(taskEvents.count == count, "RequestTaskMap.eventCount invalid, count: \(count) != taskEvents.count: \(taskEvents.count)")
+
+        return taskEvents.count
+    }
+
+    var isEmpty: Bool {
+        precondition(tasksToRequests.isEmpty == requestsToTasks.isEmpty,
+                     "RequestTaskMap.isEmpty invalid, requests.isEmpty: \(tasksToRequests.isEmpty) != tasks.isEmpty: \(requestsToTasks.isEmpty)")
+
+        return tasksToRequests.isEmpty
+    }
+
+    var isEventsEmpty: Bool {
+        precondition(taskEvents.isEmpty == isEmpty, "RequestTaskMap.isEventsEmpty invalid, isEmpty: \(isEmpty) != taskEvents.isEmpty: \(taskEvents.isEmpty)")
+
+        return taskEvents.isEmpty
+    }
+
+    mutating func disassociateIfNecessaryAfterGatheringMetricsForTask(_ task: URLSessionTask) -> Bool {
+        guard let events = taskEvents[task] else {
+            fatalError("RequestTaskMap consistency error: no events corresponding to task found.")
+        }
+
+        switch (events.completed, events.metricsGathered) {
+        case (_, true): fatalError("RequestTaskMap consistency error: duplicate metricsGatheredForTask call.")
+        case (false, false): taskEvents[task] = (completed: false, metricsGathered: true); return false
+        case (true, false): self[task] = nil; return true
+        }
+    }
+
+    mutating func disassociateIfNecessaryAfterCompletingTask(_ task: URLSessionTask) -> Bool {
+        guard let events = taskEvents[task] else {
+            fatalError("RequestTaskMap consistency error: no events corresponding to task found.")
+        }
+
+        switch (events.completed, events.metricsGathered) {
+        case (true, _): fatalError("RequestTaskMap consistency error: duplicate completionReceivedForTask call.")
+        #if os(Linux) // Linux doesn't gather metrics, so unconditionally remove the reference and return true.
+        default: self[task] = nil; return true
+        #else
+        case (false, false):
+            if #available(macOS 10.12, iOS 10, watchOS 7, tvOS 10, *) {
+                taskEvents[task] = (completed: true, metricsGathered: false); return false
+            } else {
+                // watchOS < 7 doesn't gather metrics, so unconditionally remove the reference and return true.
+                self[task] = nil; return true
+            }
+        case (false, true):
+            self[task] = nil; return true
+        #endif
+        }
+    }
+}

Pods/Alamofire/Source/Response.swift

@@ -0,0 +1,454 @@
+//
+//  Response.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Default type of `DataResponse` returned by Alamofire, with an `AFError` `Failure` type.
+public typealias AFDataResponse<Success> = DataResponse<Success, AFError>
+/// Default type of `DownloadResponse` returned by Alamofire, with an `AFError` `Failure` type.
+public typealias AFDownloadResponse<Success> = DownloadResponse<Success, AFError>
+
+/// Type used to store all values associated with a serialized response of a `DataRequest` or `UploadRequest`.
+public struct DataResponse<Success, Failure: Error> {
+    /// The URL request sent to the server.
+    public let request: URLRequest?
+
+    /// The server's response to the URL request.
+    public let response: HTTPURLResponse?
+
+    /// The data returned by the server.
+    public let data: Data?
+
+    /// The final metrics of the response.
+    ///
+    /// - Note: Due to `FB7624529`, collection of `URLSessionTaskMetrics` on watchOS is currently disabled.`
+    ///
+    public let metrics: URLSessionTaskMetrics?
+
+    /// The time taken to serialize the response.
+    public let serializationDuration: TimeInterval
+
+    /// The result of response serialization.
+    public let result: Result<Success, Failure>
+
+    /// Returns the associated value of the result if it is a success, `nil` otherwise.
+    public var value: Success? { result.success }
+
+    /// Returns the associated error value if the result if it is a failure, `nil` otherwise.
+    public var error: Failure? { result.failure }
+
+    /// Creates a `DataResponse` instance with the specified parameters derived from the response serialization.
+    ///
+    /// - Parameters:
+    ///   - request:               The `URLRequest` sent to the server.
+    ///   - response:              The `HTTPURLResponse` from the server.
+    ///   - data:                  The `Data` returned by the server.
+    ///   - metrics:               The `URLSessionTaskMetrics` of the `DataRequest` or `UploadRequest`.
+    ///   - serializationDuration: The duration taken by serialization.
+    ///   - result:                The `Result` of response serialization.
+    public init(request: URLRequest?,
+                response: HTTPURLResponse?,
+                data: Data?,
+                metrics: URLSessionTaskMetrics?,
+                serializationDuration: TimeInterval,
+                result: Result<Success, Failure>) {
+        self.request = request
+        self.response = response
+        self.data = data
+        self.metrics = metrics
+        self.serializationDuration = serializationDuration
+        self.result = result
+    }
+}
+
+// MARK: -
+
+extension DataResponse: CustomStringConvertible, CustomDebugStringConvertible {
+    /// The textual representation used when written to an output stream, which includes whether the result was a
+    /// success or failure.
+    public var description: String {
+        "\(result)"
+    }
+
+    /// The debug textual representation used when written to an output stream, which includes (if available) a summary
+    /// of the `URLRequest`, the request's headers and body (if decodable as a `String` below 100KB); the
+    /// `HTTPURLResponse`'s status code, headers, and body; the duration of the network and serialization actions; and
+    /// the `Result` of serialization.
+    public var debugDescription: String {
+        guard let urlRequest = request else { return "[Request]: None\n[Result]: \(result)" }
+
+        let requestDescription = DebugDescription.description(of: urlRequest)
+
+        let responseDescription = response.map { response in
+            let responseBodyDescription = DebugDescription.description(for: data, headers: response.headers)
+
+            return """
+            \(DebugDescription.description(of: response))
+                \(responseBodyDescription.indentingNewlines())
+            """
+        } ?? "[Response]: None"
+
+        let networkDuration = metrics.map { "\($0.taskInterval.duration)s" } ?? "None"
+
+        return """
+        \(requestDescription)
+        \(responseDescription)
+        [Network Duration]: \(networkDuration)
+        [Serialization Duration]: \(serializationDuration)s
+        [Result]: \(result)
+        """
+    }
+}
+
+// MARK: -
+
+extension DataResponse {
+    /// Evaluates the specified closure when the result of this `DataResponse` is a success, passing the unwrapped
+    /// result value as a parameter.
+    ///
+    /// Use the `map` method with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let possibleInt = possibleData.map { $0.count }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A `DataResponse` whose result wraps the value returned by the given closure. If this instance's
+    ///            result is a failure, returns a response wrapping the same failure.
+    public func map<NewSuccess>(_ transform: (Success) -> NewSuccess) -> DataResponse<NewSuccess, Failure> {
+        DataResponse<NewSuccess, Failure>(request: request,
+                                          response: response,
+                                          data: data,
+                                          metrics: metrics,
+                                          serializationDuration: serializationDuration,
+                                          result: result.map(transform))
+    }
+
+    /// Evaluates the given closure when the result of this `DataResponse` is a success, passing the unwrapped result
+    /// value as a parameter.
+    ///
+    /// Use the `tryMap` method with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let possibleObject = possibleData.tryMap {
+    ///         try JSONSerialization.jsonObject(with: $0)
+    ///     }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A success or failure `DataResponse` depending on the result of the given closure. If this instance's
+    ///            result is a failure, returns the same failure.
+    public func tryMap<NewSuccess>(_ transform: (Success) throws -> NewSuccess) -> DataResponse<NewSuccess, Error> {
+        DataResponse<NewSuccess, Error>(request: request,
+                                        response: response,
+                                        data: data,
+                                        metrics: metrics,
+                                        serializationDuration: serializationDuration,
+                                        result: result.tryMap(transform))
+    }
+
+    /// Evaluates the specified closure when the `DataResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `mapError` function with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let withMyError = possibleData.mapError { MyError.error($0) }
+    ///
+    /// - Parameter transform: A closure that takes the error of the instance.
+    ///
+    /// - Returns: A `DataResponse` instance containing the result of the transform.
+    public func mapError<NewFailure: Error>(_ transform: (Failure) -> NewFailure) -> DataResponse<Success, NewFailure> {
+        DataResponse<Success, NewFailure>(request: request,
+                                          response: response,
+                                          data: data,
+                                          metrics: metrics,
+                                          serializationDuration: serializationDuration,
+                                          result: result.mapError(transform))
+    }
+
+    /// Evaluates the specified closure when the `DataResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `tryMapError` function with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DataResponse<Data> = ...
+    ///     let possibleObject = possibleData.tryMapError {
+    ///         try someFailableFunction(taking: $0)
+    ///     }
+    ///
+    /// - Parameter transform: A throwing closure that takes the error of the instance.
+    ///
+    /// - Returns: A `DataResponse` instance containing the result of the transform.
+    public func tryMapError<NewFailure: Error>(_ transform: (Failure) throws -> NewFailure) -> DataResponse<Success, Error> {
+        DataResponse<Success, Error>(request: request,
+                                     response: response,
+                                     data: data,
+                                     metrics: metrics,
+                                     serializationDuration: serializationDuration,
+                                     result: result.tryMapError(transform))
+    }
+}
+
+// MARK: -
+
+/// Used to store all data associated with a serialized response of a download request.
+public struct DownloadResponse<Success, Failure: Error> {
+    /// The URL request sent to the server.
+    public let request: URLRequest?
+
+    /// The server's response to the URL request.
+    public let response: HTTPURLResponse?
+
+    /// The final destination URL of the data returned from the server after it is moved.
+    public let fileURL: URL?
+
+    /// The resume data generated if the request was cancelled.
+    public let resumeData: Data?
+
+    /// The final metrics of the response.
+    ///
+    /// - Note: Due to `FB7624529`, collection of `URLSessionTaskMetrics` on watchOS is currently disabled.`
+    ///
+    public let metrics: URLSessionTaskMetrics?
+
+    /// The time taken to serialize the response.
+    public let serializationDuration: TimeInterval
+
+    /// The result of response serialization.
+    public let result: Result<Success, Failure>
+
+    /// Returns the associated value of the result if it is a success, `nil` otherwise.
+    public var value: Success? { result.success }
+
+    /// Returns the associated error value if the result if it is a failure, `nil` otherwise.
+    public var error: Failure? { result.failure }
+
+    /// Creates a `DownloadResponse` instance with the specified parameters derived from response serialization.
+    ///
+    /// - Parameters:
+    ///   - request:               The `URLRequest` sent to the server.
+    ///   - response:              The `HTTPURLResponse` from the server.
+    ///   - temporaryURL:          The temporary destination `URL` of the data returned from the server.
+    ///   - destinationURL:        The final destination `URL` of the data returned from the server, if it was moved.
+    ///   - resumeData:            The resume `Data` generated if the request was cancelled.
+    ///   - metrics:               The `URLSessionTaskMetrics` of the `DownloadRequest`.
+    ///   - serializationDuration: The duration taken by serialization.
+    ///   - result:                The `Result` of response serialization.
+    public init(request: URLRequest?,
+                response: HTTPURLResponse?,
+                fileURL: URL?,
+                resumeData: Data?,
+                metrics: URLSessionTaskMetrics?,
+                serializationDuration: TimeInterval,
+                result: Result<Success, Failure>) {
+        self.request = request
+        self.response = response
+        self.fileURL = fileURL
+        self.resumeData = resumeData
+        self.metrics = metrics
+        self.serializationDuration = serializationDuration
+        self.result = result
+    }
+}
+
+// MARK: -
+
+extension DownloadResponse: CustomStringConvertible, CustomDebugStringConvertible {
+    /// The textual representation used when written to an output stream, which includes whether the result was a
+    /// success or failure.
+    public var description: String {
+        "\(result)"
+    }
+
+    /// The debug textual representation used when written to an output stream, which includes the URL request, the URL
+    /// response, the temporary and destination URLs, the resume data, the durations of the network and serialization
+    /// actions, and the response serialization result.
+    public var debugDescription: String {
+        guard let urlRequest = request else { return "[Request]: None\n[Result]: \(result)" }
+
+        let requestDescription = DebugDescription.description(of: urlRequest)
+        let responseDescription = response.map(DebugDescription.description(of:)) ?? "[Response]: None"
+        let networkDuration = metrics.map { "\($0.taskInterval.duration)s" } ?? "None"
+        let resumeDataDescription = resumeData.map { "\($0)" } ?? "None"
+
+        return """
+        \(requestDescription)
+        \(responseDescription)
+        [File URL]: \(fileURL?.path ?? "None")
+        [Resume Data]: \(resumeDataDescription)
+        [Network Duration]: \(networkDuration)
+        [Serialization Duration]: \(serializationDuration)s
+        [Result]: \(result)
+        """
+    }
+}
+
+// MARK: -
+
+extension DownloadResponse {
+    /// Evaluates the given closure when the result of this `DownloadResponse` is a success, passing the unwrapped
+    /// result value as a parameter.
+    ///
+    /// Use the `map` method with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let possibleInt = possibleData.map { $0.count }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A `DownloadResponse` whose result wraps the value returned by the given closure. If this instance's
+    ///            result is a failure, returns a response wrapping the same failure.
+    public func map<NewSuccess>(_ transform: (Success) -> NewSuccess) -> DownloadResponse<NewSuccess, Failure> {
+        DownloadResponse<NewSuccess, Failure>(request: request,
+                                              response: response,
+                                              fileURL: fileURL,
+                                              resumeData: resumeData,
+                                              metrics: metrics,
+                                              serializationDuration: serializationDuration,
+                                              result: result.map(transform))
+    }
+
+    /// Evaluates the given closure when the result of this `DownloadResponse` is a success, passing the unwrapped
+    /// result value as a parameter.
+    ///
+    /// Use the `tryMap` method with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let possibleObject = possibleData.tryMap {
+    ///         try JSONSerialization.jsonObject(with: $0)
+    ///     }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance's result.
+    ///
+    /// - returns: A success or failure `DownloadResponse` depending on the result of the given closure. If this
+    /// instance's result is a failure, returns the same failure.
+    public func tryMap<NewSuccess>(_ transform: (Success) throws -> NewSuccess) -> DownloadResponse<NewSuccess, Error> {
+        DownloadResponse<NewSuccess, Error>(request: request,
+                                            response: response,
+                                            fileURL: fileURL,
+                                            resumeData: resumeData,
+                                            metrics: metrics,
+                                            serializationDuration: serializationDuration,
+                                            result: result.tryMap(transform))
+    }
+
+    /// Evaluates the specified closure when the `DownloadResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `mapError` function with a closure that does not throw. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let withMyError = possibleData.mapError { MyError.error($0) }
+    ///
+    /// - Parameter transform: A closure that takes the error of the instance.
+    ///
+    /// - Returns: A `DownloadResponse` instance containing the result of the transform.
+    public func mapError<NewFailure: Error>(_ transform: (Failure) -> NewFailure) -> DownloadResponse<Success, NewFailure> {
+        DownloadResponse<Success, NewFailure>(request: request,
+                                              response: response,
+                                              fileURL: fileURL,
+                                              resumeData: resumeData,
+                                              metrics: metrics,
+                                              serializationDuration: serializationDuration,
+                                              result: result.mapError(transform))
+    }
+
+    /// Evaluates the specified closure when the `DownloadResponse` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `tryMapError` function with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: DownloadResponse<Data> = ...
+    ///     let possibleObject = possibleData.tryMapError {
+    ///         try someFailableFunction(taking: $0)
+    ///     }
+    ///
+    /// - Parameter transform: A throwing closure that takes the error of the instance.
+    ///
+    /// - Returns: A `DownloadResponse` instance containing the result of the transform.
+    public func tryMapError<NewFailure: Error>(_ transform: (Failure) throws -> NewFailure) -> DownloadResponse<Success, Error> {
+        DownloadResponse<Success, Error>(request: request,
+                                         response: response,
+                                         fileURL: fileURL,
+                                         resumeData: resumeData,
+                                         metrics: metrics,
+                                         serializationDuration: serializationDuration,
+                                         result: result.tryMapError(transform))
+    }
+}
+
+private enum DebugDescription {
+    static func description(of request: URLRequest) -> String {
+        let requestSummary = "\(request.httpMethod!) \(request)"
+        let requestHeadersDescription = DebugDescription.description(for: request.headers)
+        let requestBodyDescription = DebugDescription.description(for: request.httpBody, headers: request.headers)
+
+        return """
+        [Request]: \(requestSummary)
+            \(requestHeadersDescription.indentingNewlines())
+            \(requestBodyDescription.indentingNewlines())
+        """
+    }
+
+    static func description(of response: HTTPURLResponse) -> String {
+        """
+        [Response]:
+            [Status Code]: \(response.statusCode)
+            \(DebugDescription.description(for: response.headers).indentingNewlines())
+        """
+    }
+
+    static func description(for headers: HTTPHeaders) -> String {
+        guard !headers.isEmpty else { return "[Headers]: None" }
+
+        let headerDescription = "\(headers.sorted())".indentingNewlines()
+        return """
+        [Headers]:
+            \(headerDescription)
+        """
+    }
+
+    static func description(for data: Data?,
+                            headers: HTTPHeaders,
+                            allowingPrintableTypes printableTypes: [String] = ["json", "xml", "text"],
+                            maximumLength: Int = 100_000) -> String {
+        guard let data = data, !data.isEmpty else { return "[Body]: None" }
+
+        guard
+            data.count <= maximumLength,
+            printableTypes.compactMap({ headers["Content-Type"]?.contains($0) }).contains(true)
+        else { return "[Body]: \(data.count) bytes" }
+
+        return """
+        [Body]:
+            \(String(decoding: data, as: UTF8.self)
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+            .indentingNewlines())
+        """
+    }
+}
+
+extension String {
+    fileprivate func indentingNewlines(by spaceCount: Int = 4) -> String {
+        let spaces = String(repeating: " ", count: spaceCount)
+        return replacingOccurrences(of: "\n", with: "\n\(spaces)")
+    }
+}

Pods/Alamofire/Source/ResponseSerialization.swift

@@ -0,0 +1,1116 @@
+//
+//  ResponseSerialization.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+// MARK: Protocols
+
+/// The type to which all data response serializers must conform in order to serialize a response.
+public protocol DataResponseSerializerProtocol {
+    /// The type of serialized object to be created.
+    associatedtype SerializedObject
+
+    /// Serialize the response `Data` into the provided type..
+    ///
+    /// - Parameters:
+    ///   - request:  `URLRequest` which was used to perform the request, if any.
+    ///   - response: `HTTPURLResponse` received from the server, if any.
+    ///   - data:     `Data` returned from the server, if any.
+    ///   - error:    `Error` produced by Alamofire or the underlying `URLSession` during the request.
+    ///
+    /// - Returns:    The `SerializedObject`.
+    /// - Throws:     Any `Error` produced during serialization.
+    func serialize(request: URLRequest?, response: HTTPURLResponse?, data: Data?, error: Error?) throws -> SerializedObject
+}
+
+/// The type to which all download response serializers must conform in order to serialize a response.
+public protocol DownloadResponseSerializerProtocol {
+    /// The type of serialized object to be created.
+    associatedtype SerializedObject
+
+    /// Serialize the downloaded response `Data` from disk into the provided type..
+    ///
+    /// - Parameters:
+    ///   - request:  `URLRequest` which was used to perform the request, if any.
+    ///   - response: `HTTPURLResponse` received from the server, if any.
+    ///   - fileURL:  File `URL` to which the response data was downloaded.
+    ///   - error:    `Error` produced by Alamofire or the underlying `URLSession` during the request.
+    ///
+    /// - Returns:    The `SerializedObject`.
+    /// - Throws:     Any `Error` produced during serialization.
+    func serializeDownload(request: URLRequest?, response: HTTPURLResponse?, fileURL: URL?, error: Error?) throws -> SerializedObject
+}
+
+/// A serializer that can handle both data and download responses.
+public protocol ResponseSerializer: DataResponseSerializerProtocol & DownloadResponseSerializerProtocol {
+    /// `DataPreprocessor` used to prepare incoming `Data` for serialization.
+    var dataPreprocessor: DataPreprocessor { get }
+    /// `HTTPMethod`s for which empty response bodies are considered appropriate.
+    var emptyRequestMethods: Set<HTTPMethod> { get }
+    /// HTTP response codes for which empty response bodies are considered appropriate.
+    var emptyResponseCodes: Set<Int> { get }
+}
+
+/// Type used to preprocess `Data` before it handled by a serializer.
+public protocol DataPreprocessor {
+    /// Process           `Data` before it's handled by a serializer.
+    /// - Parameter data: The raw `Data` to process.
+    func preprocess(_ data: Data) throws -> Data
+}
+
+/// `DataPreprocessor` that returns passed `Data` without any transform.
+public struct PassthroughPreprocessor: DataPreprocessor {
+    public init() {}
+
+    public func preprocess(_ data: Data) throws -> Data { data }
+}
+
+/// `DataPreprocessor` that trims Google's typical `)]}',\n` XSSI JSON header.
+public struct GoogleXSSIPreprocessor: DataPreprocessor {
+    public init() {}
+
+    public func preprocess(_ data: Data) throws -> Data {
+        (data.prefix(6) == Data(")]}',\n".utf8)) ? data.dropFirst(6) : data
+    }
+}
+
+extension ResponseSerializer {
+    /// Default `DataPreprocessor`. `PassthroughPreprocessor` by default.
+    public static var defaultDataPreprocessor: DataPreprocessor { PassthroughPreprocessor() }
+    /// Default `HTTPMethod`s for which empty response bodies are considered appropriate. `[.head]` by default.
+    public static var defaultEmptyRequestMethods: Set<HTTPMethod> { [.head] }
+    /// HTTP response codes for which empty response bodies are considered appropriate. `[204, 205]` by default.
+    public static var defaultEmptyResponseCodes: Set<Int> { [204, 205] }
+
+    public var dataPreprocessor: DataPreprocessor { Self.defaultDataPreprocessor }
+    public var emptyRequestMethods: Set<HTTPMethod> { Self.defaultEmptyRequestMethods }
+    public var emptyResponseCodes: Set<Int> { Self.defaultEmptyResponseCodes }
+
+    /// Determines whether the `request` allows empty response bodies, if `request` exists.
+    ///
+    /// - Parameter request: `URLRequest` to evaluate.
+    ///
+    /// - Returns:           `Bool` representing the outcome of the evaluation, or `nil` if `request` was `nil`.
+    public func requestAllowsEmptyResponseData(_ request: URLRequest?) -> Bool? {
+        request.flatMap { $0.httpMethod }
+            .flatMap(HTTPMethod.init)
+            .map { emptyRequestMethods.contains($0) }
+    }
+
+    /// Determines whether the `response` allows empty response bodies, if `response` exists`.
+    ///
+    /// - Parameter response: `HTTPURLResponse` to evaluate.
+    ///
+    /// - Returns:            `Bool` representing the outcome of the evaluation, or `nil` if `response` was `nil`.
+    public func responseAllowsEmptyResponseData(_ response: HTTPURLResponse?) -> Bool? {
+        response.flatMap { $0.statusCode }
+            .map { emptyResponseCodes.contains($0) }
+    }
+
+    /// Determines whether `request` and `response` allow empty response bodies.
+    ///
+    /// - Parameters:
+    ///   - request:  `URLRequest` to evaluate.
+    ///   - response: `HTTPURLResponse` to evaluate.
+    ///
+    /// - Returns:    `true` if `request` or `response` allow empty bodies, `false` otherwise.
+    public func emptyResponseAllowed(forRequest request: URLRequest?, response: HTTPURLResponse?) -> Bool {
+        (requestAllowsEmptyResponseData(request) == true) || (responseAllowsEmptyResponseData(response) == true)
+    }
+}
+
+/// By default, any serializer declared to conform to both types will get file serialization for free, as it just feeds
+/// the data read from disk into the data response serializer.
+extension DownloadResponseSerializerProtocol where Self: DataResponseSerializerProtocol {
+    public func serializeDownload(request: URLRequest?, response: HTTPURLResponse?, fileURL: URL?, error: Error?) throws -> Self.SerializedObject {
+        guard error == nil else { throw error! }
+
+        guard let fileURL = fileURL else {
+            throw AFError.responseSerializationFailed(reason: .inputFileNil)
+        }
+
+        let data: Data
+        do {
+            data = try Data(contentsOf: fileURL)
+        } catch {
+            throw AFError.responseSerializationFailed(reason: .inputFileReadFailed(at: fileURL))
+        }
+
+        do {
+            return try serialize(request: request, response: response, data: data, error: error)
+        } catch {
+            throw error
+        }
+    }
+}
+
+// MARK: - Default
+
+extension DataRequest {
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:             The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - completionHandler: The code to be executed once the request has finished.
+    ///
+    /// - Returns:             The request.
+    @discardableResult
+    public func response(queue: DispatchQueue = .main, completionHandler: @escaping (AFDataResponse<Data?>) -> Void) -> Self {
+        appendResponseSerializer {
+            // Start work that should be on the serialization queue.
+            let result = AFResult<Data?>(value: self.data, error: self.error)
+            // End work that should be on the serialization queue.
+
+            self.underlyingQueue.async {
+                let response = DataResponse(request: self.request,
+                                            response: self.response,
+                                            data: self.data,
+                                            metrics: self.metrics,
+                                            serializationDuration: 0,
+                                            result: result)
+
+                self.eventMonitor?.request(self, didParseResponse: response)
+
+                self.responseSerializerDidComplete { queue.async { completionHandler(response) } }
+            }
+        }
+
+        return self
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:              The queue on which the completion handler is dispatched. `.main` by default
+    ///   - responseSerializer: The response serializer responsible for serializing the request, response, and data.
+    ///   - completionHandler:  The code to be executed once the request has finished.
+    ///
+    /// - Returns:              The request.
+    @discardableResult
+    public func response<Serializer: DataResponseSerializerProtocol>(queue: DispatchQueue = .main,
+                                                                     responseSerializer: Serializer,
+                                                                     completionHandler: @escaping (AFDataResponse<Serializer.SerializedObject>) -> Void)
+        -> Self {
+        appendResponseSerializer {
+            // Start work that should be on the serialization queue.
+            let start = ProcessInfo.processInfo.systemUptime
+            let result: AFResult<Serializer.SerializedObject> = Result {
+                try responseSerializer.serialize(request: self.request,
+                                                 response: self.response,
+                                                 data: self.data,
+                                                 error: self.error)
+            }.mapError { error in
+                error.asAFError(or: .responseSerializationFailed(reason: .customSerializationFailed(error: error)))
+            }
+
+            let end = ProcessInfo.processInfo.systemUptime
+            // End work that should be on the serialization queue.
+
+            self.underlyingQueue.async {
+                let response = DataResponse(request: self.request,
+                                            response: self.response,
+                                            data: self.data,
+                                            metrics: self.metrics,
+                                            serializationDuration: end - start,
+                                            result: result)
+
+                self.eventMonitor?.request(self, didParseResponse: response)
+
+                guard let serializerError = result.failure, let delegate = self.delegate else {
+                    self.responseSerializerDidComplete { queue.async { completionHandler(response) } }
+                    return
+                }
+
+                delegate.retryResult(for: self, dueTo: serializerError) { retryResult in
+                    var didComplete: (() -> Void)?
+
+                    defer {
+                        if let didComplete = didComplete {
+                            self.responseSerializerDidComplete { queue.async { didComplete() } }
+                        }
+                    }
+
+                    switch retryResult {
+                    case .doNotRetry:
+                        didComplete = { completionHandler(response) }
+
+                    case let .doNotRetryWithError(retryError):
+                        let result: AFResult<Serializer.SerializedObject> = .failure(retryError.asAFError(orFailWith: "Received retryError was not already AFError"))
+
+                        let response = DataResponse(request: self.request,
+                                                    response: self.response,
+                                                    data: self.data,
+                                                    metrics: self.metrics,
+                                                    serializationDuration: end - start,
+                                                    result: result)
+
+                        didComplete = { completionHandler(response) }
+
+                    case .retry, .retryWithDelay:
+                        delegate.retryRequest(self, withDelay: retryResult.delay)
+                    }
+                }
+            }
+        }
+
+        return self
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:             The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - completionHandler: The code to be executed once the request has finished.
+    ///
+    /// - Returns:             The request.
+    @discardableResult
+    public func response(queue: DispatchQueue = .main,
+                         completionHandler: @escaping (AFDownloadResponse<URL?>) -> Void)
+        -> Self {
+        appendResponseSerializer {
+            // Start work that should be on the serialization queue.
+            let result = AFResult<URL?>(value: self.fileURL, error: self.error)
+            // End work that should be on the serialization queue.
+
+            self.underlyingQueue.async {
+                let response = DownloadResponse(request: self.request,
+                                                response: self.response,
+                                                fileURL: self.fileURL,
+                                                resumeData: self.resumeData,
+                                                metrics: self.metrics,
+                                                serializationDuration: 0,
+                                                result: result)
+
+                self.eventMonitor?.request(self, didParseResponse: response)
+
+                self.responseSerializerDidComplete { queue.async { completionHandler(response) } }
+            }
+        }
+
+        return self
+    }
+
+    /// Adds a handler to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:              The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - responseSerializer: The response serializer responsible for serializing the request, response, and data
+    ///                         contained in the destination `URL`.
+    ///   - completionHandler:  The code to be executed once the request has finished.
+    ///
+    /// - Returns:              The request.
+    @discardableResult
+    public func response<Serializer: DownloadResponseSerializerProtocol>(queue: DispatchQueue = .main,
+                                                                         responseSerializer: Serializer,
+                                                                         completionHandler: @escaping (AFDownloadResponse<Serializer.SerializedObject>) -> Void)
+        -> Self {
+        appendResponseSerializer {
+            // Start work that should be on the serialization queue.
+            let start = ProcessInfo.processInfo.systemUptime
+            let result: AFResult<Serializer.SerializedObject> = Result {
+                try responseSerializer.serializeDownload(request: self.request,
+                                                         response: self.response,
+                                                         fileURL: self.fileURL,
+                                                         error: self.error)
+            }.mapError { error in
+                error.asAFError(or: .responseSerializationFailed(reason: .customSerializationFailed(error: error)))
+            }
+            let end = ProcessInfo.processInfo.systemUptime
+            // End work that should be on the serialization queue.
+
+            self.underlyingQueue.async {
+                let response = DownloadResponse(request: self.request,
+                                                response: self.response,
+                                                fileURL: self.fileURL,
+                                                resumeData: self.resumeData,
+                                                metrics: self.metrics,
+                                                serializationDuration: end - start,
+                                                result: result)
+
+                self.eventMonitor?.request(self, didParseResponse: response)
+
+                guard let serializerError = result.failure, let delegate = self.delegate else {
+                    self.responseSerializerDidComplete { queue.async { completionHandler(response) } }
+                    return
+                }
+
+                delegate.retryResult(for: self, dueTo: serializerError) { retryResult in
+                    var didComplete: (() -> Void)?
+
+                    defer {
+                        if let didComplete = didComplete {
+                            self.responseSerializerDidComplete { queue.async { didComplete() } }
+                        }
+                    }
+
+                    switch retryResult {
+                    case .doNotRetry:
+                        didComplete = { completionHandler(response) }
+
+                    case let .doNotRetryWithError(retryError):
+                        let result: AFResult<Serializer.SerializedObject> = .failure(retryError.asAFError(orFailWith: "Received retryError was not already AFError"))
+
+                        let response = DownloadResponse(request: self.request,
+                                                        response: self.response,
+                                                        fileURL: self.fileURL,
+                                                        resumeData: self.resumeData,
+                                                        metrics: self.metrics,
+                                                        serializationDuration: end - start,
+                                                        result: result)
+
+                        didComplete = { completionHandler(response) }
+
+                    case .retry, .retryWithDelay:
+                        delegate.retryRequest(self, withDelay: retryResult.delay)
+                    }
+                }
+            }
+        }
+
+        return self
+    }
+}
+
+// MARK: - URL
+
+/// A `DownloadResponseSerializerProtocol` that performs only `Error` checking and ensures that a downloaded `fileURL`
+/// is present.
+public struct URLResponseSerializer: DownloadResponseSerializerProtocol {
+    /// Creates an instance.
+    public init() {}
+
+    public func serializeDownload(request: URLRequest?,
+                                  response: HTTPURLResponse?,
+                                  fileURL: URL?,
+                                  error: Error?) throws -> URL {
+        guard error == nil else { throw error! }
+
+        guard let url = fileURL else {
+            throw AFError.responseSerializationFailed(reason: .inputFileNil)
+        }
+
+        return url
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler using a `URLResponseSerializer` to be called once the request is finished.
+    ///
+    /// - Parameters:
+    ///   - queue:             The queue on which the completion handler is called. `.main` by default.
+    ///   - completionHandler: A closure to be executed once the request has finished.
+    ///
+    /// - Returns:             The request.
+    @discardableResult
+    public func responseURL(queue: DispatchQueue = .main,
+                            completionHandler: @escaping (AFDownloadResponse<URL>) -> Void) -> Self {
+        response(queue: queue, responseSerializer: URLResponseSerializer(), completionHandler: completionHandler)
+    }
+}
+
+// MARK: - Data
+
+/// A `ResponseSerializer` that performs minimal response checking and returns any response `Data` as-is. By default, a
+/// request returning `nil` or no data is considered an error. However, if the request has an `HTTPMethod` or the
+/// response has an  HTTP status code valid for empty responses, then an empty `Data` value is returned.
+public final class DataResponseSerializer: ResponseSerializer {
+    public let dataPreprocessor: DataPreprocessor
+    public let emptyResponseCodes: Set<Int>
+    public let emptyRequestMethods: Set<HTTPMethod>
+
+    /// Creates an instance using the provided values.
+    ///
+    /// - Parameters:
+    ///   - dataPreprocessor:    `DataPreprocessor` used to prepare the received `Data` for serialization.
+    ///   - emptyResponseCodes:  The HTTP response codes for which empty responses are allowed. `[204, 205]` by default.
+    ///   - emptyRequestMethods: The HTTP request methods for which empty responses are allowed. `[.head]` by default.
+    public init(dataPreprocessor: DataPreprocessor = DataResponseSerializer.defaultDataPreprocessor,
+                emptyResponseCodes: Set<Int> = DataResponseSerializer.defaultEmptyResponseCodes,
+                emptyRequestMethods: Set<HTTPMethod> = DataResponseSerializer.defaultEmptyRequestMethods) {
+        self.dataPreprocessor = dataPreprocessor
+        self.emptyResponseCodes = emptyResponseCodes
+        self.emptyRequestMethods = emptyRequestMethods
+    }
+
+    public func serialize(request: URLRequest?, response: HTTPURLResponse?, data: Data?, error: Error?) throws -> Data {
+        guard error == nil else { throw error! }
+
+        guard var data = data, !data.isEmpty else {
+            guard emptyResponseAllowed(forRequest: request, response: response) else {
+                throw AFError.responseSerializationFailed(reason: .inputDataNilOrZeroLength)
+            }
+
+            return Data()
+        }
+
+        data = try dataPreprocessor.preprocess(data)
+
+        return data
+    }
+}
+
+extension DataRequest {
+    /// Adds a handler using a `DataResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:               The queue on which the completion handler is called. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseData(queue: DispatchQueue = .main,
+                             dataPreprocessor: DataPreprocessor = DataResponseSerializer.defaultDataPreprocessor,
+                             emptyResponseCodes: Set<Int> = DataResponseSerializer.defaultEmptyResponseCodes,
+                             emptyRequestMethods: Set<HTTPMethod> = DataResponseSerializer.defaultEmptyRequestMethods,
+                             completionHandler: @escaping (AFDataResponse<Data>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: DataResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                            emptyResponseCodes: emptyResponseCodes,
+                                                            emptyRequestMethods: emptyRequestMethods),
+                 completionHandler: completionHandler)
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler using a `DataResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:               The queue on which the completion handler is called. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseData(queue: DispatchQueue = .main,
+                             dataPreprocessor: DataPreprocessor = DataResponseSerializer.defaultDataPreprocessor,
+                             emptyResponseCodes: Set<Int> = DataResponseSerializer.defaultEmptyResponseCodes,
+                             emptyRequestMethods: Set<HTTPMethod> = DataResponseSerializer.defaultEmptyRequestMethods,
+                             completionHandler: @escaping (AFDownloadResponse<Data>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: DataResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                            emptyResponseCodes: emptyResponseCodes,
+                                                            emptyRequestMethods: emptyRequestMethods),
+                 completionHandler: completionHandler)
+    }
+}
+
+// MARK: - String
+
+/// A `ResponseSerializer` that decodes the response data as a `String`. By default, a request returning `nil` or no
+/// data is considered an error. However, if the request has an `HTTPMethod` or the response has an  HTTP status code
+/// valid for empty responses, then an empty `String` is returned.
+public final class StringResponseSerializer: ResponseSerializer {
+    public let dataPreprocessor: DataPreprocessor
+    /// Optional string encoding used to validate the response.
+    public let encoding: String.Encoding?
+    public let emptyResponseCodes: Set<Int>
+    public let emptyRequestMethods: Set<HTTPMethod>
+
+    /// Creates an instance with the provided values.
+    ///
+    /// - Parameters:
+    ///   - dataPreprocessor:    `DataPreprocessor` used to prepare the received `Data` for serialization.
+    ///   - encoding:            A string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  The HTTP response codes for which empty responses are allowed. `[204, 205]` by default.
+    ///   - emptyRequestMethods: The HTTP request methods for which empty responses are allowed. `[.head]` by default.
+    public init(dataPreprocessor: DataPreprocessor = StringResponseSerializer.defaultDataPreprocessor,
+                encoding: String.Encoding? = nil,
+                emptyResponseCodes: Set<Int> = StringResponseSerializer.defaultEmptyResponseCodes,
+                emptyRequestMethods: Set<HTTPMethod> = StringResponseSerializer.defaultEmptyRequestMethods) {
+        self.dataPreprocessor = dataPreprocessor
+        self.encoding = encoding
+        self.emptyResponseCodes = emptyResponseCodes
+        self.emptyRequestMethods = emptyRequestMethods
+    }
+
+    public func serialize(request: URLRequest?, response: HTTPURLResponse?, data: Data?, error: Error?) throws -> String {
+        guard error == nil else { throw error! }
+
+        guard var data = data, !data.isEmpty else {
+            guard emptyResponseAllowed(forRequest: request, response: response) else {
+                throw AFError.responseSerializationFailed(reason: .inputDataNilOrZeroLength)
+            }
+
+            return ""
+        }
+
+        data = try dataPreprocessor.preprocess(data)
+
+        var convertedEncoding = encoding
+
+        if let encodingName = response?.textEncodingName, convertedEncoding == nil {
+            convertedEncoding = String.Encoding(ianaCharsetName: encodingName)
+        }
+
+        let actualEncoding = convertedEncoding ?? .isoLatin1
+
+        guard let string = String(data: data, encoding: actualEncoding) else {
+            throw AFError.responseSerializationFailed(reason: .stringSerializationFailed(encoding: actualEncoding))
+        }
+
+        return string
+    }
+}
+
+extension DataRequest {
+    /// Adds a handler using a `StringResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:               The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - encoding:            The string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseString(queue: DispatchQueue = .main,
+                               dataPreprocessor: DataPreprocessor = StringResponseSerializer.defaultDataPreprocessor,
+                               encoding: String.Encoding? = nil,
+                               emptyResponseCodes: Set<Int> = StringResponseSerializer.defaultEmptyResponseCodes,
+                               emptyRequestMethods: Set<HTTPMethod> = StringResponseSerializer.defaultEmptyRequestMethods,
+                               completionHandler: @escaping (AFDataResponse<String>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: StringResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                              encoding: encoding,
+                                                              emptyResponseCodes: emptyResponseCodes,
+                                                              emptyRequestMethods: emptyRequestMethods),
+                 completionHandler: completionHandler)
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler using a `StringResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:               The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - encoding:            The string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseString(queue: DispatchQueue = .main,
+                               dataPreprocessor: DataPreprocessor = StringResponseSerializer.defaultDataPreprocessor,
+                               encoding: String.Encoding? = nil,
+                               emptyResponseCodes: Set<Int> = StringResponseSerializer.defaultEmptyResponseCodes,
+                               emptyRequestMethods: Set<HTTPMethod> = StringResponseSerializer.defaultEmptyRequestMethods,
+                               completionHandler: @escaping (AFDownloadResponse<String>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: StringResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                              encoding: encoding,
+                                                              emptyResponseCodes: emptyResponseCodes,
+                                                              emptyRequestMethods: emptyRequestMethods),
+                 completionHandler: completionHandler)
+    }
+}
+
+// MARK: - JSON
+
+/// A `ResponseSerializer` that decodes the response data using `JSONSerialization`. By default, a request returning
+/// `nil` or no data is considered an error. However, if the request has an `HTTPMethod` or the response has an
+/// HTTP status code valid for empty responses, then an `NSNull` value is returned.
+public final class JSONResponseSerializer: ResponseSerializer {
+    public let dataPreprocessor: DataPreprocessor
+    public let emptyResponseCodes: Set<Int>
+    public let emptyRequestMethods: Set<HTTPMethod>
+    /// `JSONSerialization.ReadingOptions` used when serializing a response.
+    public let options: JSONSerialization.ReadingOptions
+
+    /// Creates an instance with the provided values.
+    ///
+    /// - Parameters:
+    ///   - dataPreprocessor:    `DataPreprocessor` used to prepare the received `Data` for serialization.
+    ///   - emptyResponseCodes:  The HTTP response codes for which empty responses are allowed. `[204, 205]` by default.
+    ///   - emptyRequestMethods: The HTTP request methods for which empty responses are allowed. `[.head]` by default.
+    ///   - options:             The options to use. `.allowFragments` by default.
+    public init(dataPreprocessor: DataPreprocessor = JSONResponseSerializer.defaultDataPreprocessor,
+                emptyResponseCodes: Set<Int> = JSONResponseSerializer.defaultEmptyResponseCodes,
+                emptyRequestMethods: Set<HTTPMethod> = JSONResponseSerializer.defaultEmptyRequestMethods,
+                options: JSONSerialization.ReadingOptions = .allowFragments) {
+        self.dataPreprocessor = dataPreprocessor
+        self.emptyResponseCodes = emptyResponseCodes
+        self.emptyRequestMethods = emptyRequestMethods
+        self.options = options
+    }
+
+    public func serialize(request: URLRequest?, response: HTTPURLResponse?, data: Data?, error: Error?) throws -> Any {
+        guard error == nil else { throw error! }
+
+        guard var data = data, !data.isEmpty else {
+            guard emptyResponseAllowed(forRequest: request, response: response) else {
+                throw AFError.responseSerializationFailed(reason: .inputDataNilOrZeroLength)
+            }
+
+            return NSNull()
+        }
+
+        data = try dataPreprocessor.preprocess(data)
+
+        do {
+            return try JSONSerialization.jsonObject(with: data, options: options)
+        } catch {
+            throw AFError.responseSerializationFailed(reason: .jsonSerializationFailed(error: error))
+        }
+    }
+}
+
+extension DataRequest {
+    /// Adds a handler using a `JSONResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:               The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - encoding:            The string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - options:             `JSONSerialization.ReadingOptions` used when parsing the response. `.allowFragments`
+    ///                          by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseJSON(queue: DispatchQueue = .main,
+                             dataPreprocessor: DataPreprocessor = JSONResponseSerializer.defaultDataPreprocessor,
+                             emptyResponseCodes: Set<Int> = JSONResponseSerializer.defaultEmptyResponseCodes,
+                             emptyRequestMethods: Set<HTTPMethod> = JSONResponseSerializer.defaultEmptyRequestMethods,
+                             options: JSONSerialization.ReadingOptions = .allowFragments,
+                             completionHandler: @escaping (AFDataResponse<Any>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: JSONResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                            emptyResponseCodes: emptyResponseCodes,
+                                                            emptyRequestMethods: emptyRequestMethods,
+                                                            options: options),
+                 completionHandler: completionHandler)
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler using a `JSONResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - queue:               The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - encoding:            The string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - options:             `JSONSerialization.ReadingOptions` used when parsing the response. `.allowFragments`
+    ///                          by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseJSON(queue: DispatchQueue = .main,
+                             dataPreprocessor: DataPreprocessor = JSONResponseSerializer.defaultDataPreprocessor,
+                             emptyResponseCodes: Set<Int> = JSONResponseSerializer.defaultEmptyResponseCodes,
+                             emptyRequestMethods: Set<HTTPMethod> = JSONResponseSerializer.defaultEmptyRequestMethods,
+                             options: JSONSerialization.ReadingOptions = .allowFragments,
+                             completionHandler: @escaping (AFDownloadResponse<Any>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: JSONResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                            emptyResponseCodes: emptyResponseCodes,
+                                                            emptyRequestMethods: emptyRequestMethods,
+                                                            options: options),
+                 completionHandler: completionHandler)
+    }
+}
+
+// MARK: - Empty
+
+/// Protocol representing an empty response. Use `T.emptyValue()` to get an instance.
+public protocol EmptyResponse {
+    /// Empty value for the conforming type.
+    ///
+    /// - Returns: Value of `Self` to use for empty values.
+    static func emptyValue() -> Self
+}
+
+/// Type representing an empty value. Use `Empty.value` to get the static instance.
+public struct Empty: Codable {
+    /// Static `Empty` instance used for all `Empty` responses.
+    public static let value = Empty()
+}
+
+extension Empty: EmptyResponse {
+    public static func emptyValue() -> Empty {
+        value
+    }
+}
+
+// MARK: - DataDecoder Protocol
+
+/// Any type which can decode `Data` into a `Decodable` type.
+public protocol DataDecoder {
+    /// Decode `Data` into the provided type.
+    ///
+    /// - Parameters:
+    ///   - type:  The `Type` to be decoded.
+    ///   - data:  The `Data` to be decoded.
+    ///
+    /// - Returns: The decoded value of type `D`.
+    /// - Throws:  Any error that occurs during decode.
+    func decode<D: Decodable>(_ type: D.Type, from data: Data) throws -> D
+}
+
+/// `JSONDecoder` automatically conforms to `DataDecoder`.
+extension JSONDecoder: DataDecoder {}
+/// `PropertyListDecoder` automatically conforms to `DataDecoder`.
+extension PropertyListDecoder: DataDecoder {}
+
+// MARK: - Decodable
+
+/// A `ResponseSerializer` that decodes the response data as a generic value using any type that conforms to
+/// `DataDecoder`. By default, this is an instance of `JSONDecoder`. Additionally, a request returning `nil` or no data
+/// is considered an error. However, if the request has an `HTTPMethod` or the response has an HTTP status code valid
+/// for empty responses then an empty value will be returned. If the decoded type conforms to `EmptyResponse`, the
+/// type's `emptyValue()` will be returned. If the decoded type is `Empty`, the `.value` instance is returned. If the
+/// decoded type *does not* conform to `EmptyResponse` and isn't `Empty`, an error will be produced.
+public final class DecodableResponseSerializer<T: Decodable>: ResponseSerializer {
+    public let dataPreprocessor: DataPreprocessor
+    /// The `DataDecoder` instance used to decode responses.
+    public let decoder: DataDecoder
+    public let emptyResponseCodes: Set<Int>
+    public let emptyRequestMethods: Set<HTTPMethod>
+
+    /// Creates an instance using the values provided.
+    ///
+    /// - Parameters:
+    ///   - dataPreprocessor:    `DataPreprocessor` used to prepare the received `Data` for serialization.
+    ///   - decoder:             The `DataDecoder`. `JSONDecoder()` by default.
+    ///   - emptyResponseCodes:  The HTTP response codes for which empty responses are allowed. `[204, 205]` by default.
+    ///   - emptyRequestMethods: The HTTP request methods for which empty responses are allowed. `[.head]` by default.
+    public init(dataPreprocessor: DataPreprocessor = DecodableResponseSerializer.defaultDataPreprocessor,
+                decoder: DataDecoder = JSONDecoder(),
+                emptyResponseCodes: Set<Int> = DecodableResponseSerializer.defaultEmptyResponseCodes,
+                emptyRequestMethods: Set<HTTPMethod> = DecodableResponseSerializer.defaultEmptyRequestMethods) {
+        self.dataPreprocessor = dataPreprocessor
+        self.decoder = decoder
+        self.emptyResponseCodes = emptyResponseCodes
+        self.emptyRequestMethods = emptyRequestMethods
+    }
+
+    public func serialize(request: URLRequest?, response: HTTPURLResponse?, data: Data?, error: Error?) throws -> T {
+        guard error == nil else { throw error! }
+
+        guard var data = data, !data.isEmpty else {
+            guard emptyResponseAllowed(forRequest: request, response: response) else {
+                throw AFError.responseSerializationFailed(reason: .inputDataNilOrZeroLength)
+            }
+
+            guard let emptyResponseType = T.self as? EmptyResponse.Type, let emptyValue = emptyResponseType.emptyValue() as? T else {
+                throw AFError.responseSerializationFailed(reason: .invalidEmptyResponse(type: "\(T.self)"))
+            }
+
+            return emptyValue
+        }
+
+        data = try dataPreprocessor.preprocess(data)
+
+        do {
+            return try decoder.decode(T.self, from: data)
+        } catch {
+            throw AFError.responseSerializationFailed(reason: .decodingFailed(error: error))
+        }
+    }
+}
+
+extension DataRequest {
+    /// Adds a handler using a `DecodableResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - type:                `Decodable` type to decode from response data.
+    ///   - queue:               The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - decoder:             `DataDecoder` to use to decode the response. `JSONDecoder()` by default.
+    ///   - encoding:            The string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - options:             `JSONSerialization.ReadingOptions` used when parsing the response. `.allowFragments`
+    ///                          by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseDecodable<T: Decodable>(of type: T.Type = T.self,
+                                                queue: DispatchQueue = .main,
+                                                dataPreprocessor: DataPreprocessor = DecodableResponseSerializer<T>.defaultDataPreprocessor,
+                                                decoder: DataDecoder = JSONDecoder(),
+                                                emptyResponseCodes: Set<Int> = DecodableResponseSerializer<T>.defaultEmptyResponseCodes,
+                                                emptyRequestMethods: Set<HTTPMethod> = DecodableResponseSerializer<T>.defaultEmptyRequestMethods,
+                                                completionHandler: @escaping (AFDataResponse<T>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: DecodableResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                                 decoder: decoder,
+                                                                 emptyResponseCodes: emptyResponseCodes,
+                                                                 emptyRequestMethods: emptyRequestMethods),
+                 completionHandler: completionHandler)
+    }
+}
+
+extension DownloadRequest {
+    /// Adds a handler using a `DecodableResponseSerializer` to be called once the request has finished.
+    ///
+    /// - Parameters:
+    ///   - type:                `Decodable` type to decode from response data.
+    ///   - queue:               The queue on which the completion handler is dispatched. `.main` by default.
+    ///   - dataPreprocessor:    `DataPreprocessor` which processes the received `Data` before calling the
+    ///                          `completionHandler`. `PassthroughPreprocessor()` by default.
+    ///   - decoder:             `DataDecoder` to use to decode the response. `JSONDecoder()` by default.
+    ///   - encoding:            The string encoding. Defaults to `nil`, in which case the encoding will be determined
+    ///                          from the server response, falling back to the default HTTP character set, `ISO-8859-1`.
+    ///   - emptyResponseCodes:  HTTP status codes for which empty responses are always valid. `[204, 205]` by default.
+    ///   - emptyRequestMethods: `HTTPMethod`s for which empty responses are always valid. `[.head]` by default.
+    ///   - options:             `JSONSerialization.ReadingOptions` used when parsing the response. `.allowFragments`
+    ///                          by default.
+    ///   - completionHandler:   A closure to be executed once the request has finished.
+    ///
+    /// - Returns:               The request.
+    @discardableResult
+    public func responseDecodable<T: Decodable>(of type: T.Type = T.self,
+                                                queue: DispatchQueue = .main,
+                                                dataPreprocessor: DataPreprocessor = DecodableResponseSerializer<T>.defaultDataPreprocessor,
+                                                decoder: DataDecoder = JSONDecoder(),
+                                                emptyResponseCodes: Set<Int> = DecodableResponseSerializer<T>.defaultEmptyResponseCodes,
+                                                emptyRequestMethods: Set<HTTPMethod> = DecodableResponseSerializer<T>.defaultEmptyRequestMethods,
+                                                completionHandler: @escaping (AFDownloadResponse<T>) -> Void) -> Self {
+        response(queue: queue,
+                 responseSerializer: DecodableResponseSerializer(dataPreprocessor: dataPreprocessor,
+                                                                 decoder: decoder,
+                                                                 emptyResponseCodes: emptyResponseCodes,
+                                                                 emptyRequestMethods: emptyRequestMethods),
+                 completionHandler: completionHandler)
+    }
+}
+
+// MARK: - DataStreamRequest
+
+/// A type which can serialize incoming `Data`.
+public protocol DataStreamSerializer {
+    /// Type produced from the serialized `Data`.
+    associatedtype SerializedObject
+
+    /// Serializes incoming `Data` into a `SerializedObject` value.
+    ///
+    /// - Parameter data: `Data` to be serialized.
+    ///
+    /// - Throws: Any error produced during serialization.
+    func serialize(_ data: Data) throws -> SerializedObject
+}
+
+/// `DataStreamSerializer` which uses the provided `DataPreprocessor` and `DataDecoder` to serialize the incoming `Data`.
+public struct DecodableStreamSerializer<T: Decodable>: DataStreamSerializer {
+    /// `DataDecoder` used to decode incoming `Data`.
+    public let decoder: DataDecoder
+    /// `DataPreprocessor` incoming `Data` is passed through before being passed to the `DataDecoder`.
+    public let dataPreprocessor: DataPreprocessor
+
+    /// Creates an instance with the provided `DataDecoder` and `DataPreprocessor`.
+    /// - Parameters:
+    ///   - decoder: `        DataDecoder` used to decode incoming `Data`.
+    ///   - dataPreprocessor: `DataPreprocessor` used to process incoming `Data` before it's passed through the `decoder`.
+    public init(decoder: DataDecoder = JSONDecoder(), dataPreprocessor: DataPreprocessor = PassthroughPreprocessor()) {
+        self.decoder = decoder
+        self.dataPreprocessor = dataPreprocessor
+    }
+
+    public func serialize(_ data: Data) throws -> T {
+        let processedData = try dataPreprocessor.preprocess(data)
+        do {
+            return try decoder.decode(T.self, from: processedData)
+        } catch {
+            throw AFError.responseSerializationFailed(reason: .decodingFailed(error: error))
+        }
+    }
+}
+
+/// `DataStreamSerializer` which performs no serialization on incoming `Data`.
+public struct PassthroughStreamSerializer: DataStreamSerializer {
+    public func serialize(_ data: Data) throws -> Data { data }
+}
+
+/// `DataStreamSerializer` which serializes incoming stream `Data` into `UTF8`-decoded `String` values.
+public struct StringStreamSerializer: DataStreamSerializer {
+    public func serialize(_ data: Data) throws -> String {
+        String(decoding: data, as: UTF8.self)
+    }
+}
+
+extension DataStreamRequest {
+    /// Adds a `StreamHandler` which performs no parsing on incoming `Data`.
+    ///
+    /// - Parameters:
+    ///   - queue:  `DispatchQueue` on which to perform `StreamHandler` closure.
+    ///   - stream: `StreamHandler` closure called as `Data` is received. May be called multiple times.
+    ///
+    /// - Returns:  The `DataStreamRequest`.
+    @discardableResult
+    public func responseStream(on queue: DispatchQueue = .main, stream: @escaping Handler<Data, Never>) -> Self {
+        let parser = { [unowned self] (data: Data) in
+            queue.async {
+                self.capturingError {
+                    try stream(.init(event: .stream(.success(data)), token: .init(self)))
+                }
+
+                self.updateAndCompleteIfPossible()
+            }
+        }
+
+        $streamMutableState.write { $0.streams.append(parser) }
+        appendStreamCompletion(on: queue, stream: stream)
+
+        return self
+    }
+
+    /// Adds a `StreamHandler` which uses the provided `DataStreamSerializer` to process incoming `Data`.
+    ///
+    /// - Parameters:
+    ///   - serializer: `DataStreamSerializer` used to process incoming `Data`. Its work is done on the `serializationQueue`.
+    ///   - queue:      `DispatchQueue` on which to perform `StreamHandler` closure.
+    ///   - stream:     `StreamHandler` closure called as `Data` is received. May be called multiple times.
+    ///
+    /// - Returns:      The `DataStreamRequest`.
+    @discardableResult
+    public func responseStream<Serializer: DataStreamSerializer>(using serializer: Serializer,
+                                                                 on queue: DispatchQueue = .main,
+                                                                 stream: @escaping Handler<Serializer.SerializedObject, AFError>) -> Self {
+        let parser = { [unowned self] (data: Data) in
+            self.serializationQueue.async {
+                // Start work on serialization queue.
+                let result = Result { try serializer.serialize(data) }
+                    .mapError { $0.asAFError(or: .responseSerializationFailed(reason: .customSerializationFailed(error: $0))) }
+                // End work on serialization queue.
+                self.underlyingQueue.async {
+                    self.eventMonitor?.request(self, didParseStream: result)
+
+                    if result.isFailure, self.automaticallyCancelOnStreamError {
+                        self.cancel()
+                    }
+
+                    queue.async {
+                        self.capturingError {
+                            try stream(.init(event: .stream(result), token: .init(self)))
+                        }
+
+                        self.updateAndCompleteIfPossible()
+                    }
+                }
+            }
+        }
+
+        $streamMutableState.write { $0.streams.append(parser) }
+        appendStreamCompletion(on: queue, stream: stream)
+
+        return self
+    }
+
+    /// Adds a `StreamHandler` which parses incoming `Data` as a UTF8 `String`.
+    ///
+    /// - Parameters:
+    ///   - queue:      `DispatchQueue` on which to perform `StreamHandler` closure.
+    ///   - stream:     `StreamHandler` closure called as `Data` is received. May be called multiple times.
+    ///
+    /// - Returns:  The `DataStreamRequest`.
+    @discardableResult
+    public func responseStreamString(on queue: DispatchQueue = .main,
+                                     stream: @escaping Handler<String, Never>) -> Self {
+        let parser = { [unowned self] (data: Data) in
+            self.serializationQueue.async {
+                // Start work on serialization queue.
+                let string = String(decoding: data, as: UTF8.self)
+                // End work on serialization queue.
+                self.underlyingQueue.async {
+                    self.eventMonitor?.request(self, didParseStream: .success(string))
+
+                    queue.async {
+                        self.capturingError {
+                            try stream(.init(event: .stream(.success(string)), token: .init(self)))
+                        }
+
+                        self.updateAndCompleteIfPossible()
+                    }
+                }
+            }
+        }
+
+        $streamMutableState.write { $0.streams.append(parser) }
+        appendStreamCompletion(on: queue, stream: stream)
+
+        return self
+    }
+
+    private func updateAndCompleteIfPossible() {
+        $streamMutableState.write { state in
+            state.numberOfExecutingStreams -= 1
+
+            guard state.numberOfExecutingStreams == 0, !state.enqueuedCompletionEvents.isEmpty else { return }
+
+            let completionEvents = state.enqueuedCompletionEvents
+            self.underlyingQueue.async { completionEvents.forEach { $0() } }
+            state.enqueuedCompletionEvents.removeAll()
+        }
+    }
+
+    /// Adds a `StreamHandler` which parses incoming `Data` using the provided `DataDecoder`.
+    ///
+    /// - Parameters:
+    ///   - type:         `Decodable` type to parse incoming `Data` into.
+    ///   - queue:        `DispatchQueue` on which to perform `StreamHandler` closure.
+    ///   - decoder:      `DataDecoder` used to decode the incoming `Data`.
+    ///   - preprocessor: `DataPreprocessor` used to process the incoming `Data` before it's passed to the `decoder`.
+    ///   - stream:       `StreamHandler` closure called as `Data` is received. May be called multiple times.
+    ///
+    /// - Returns: The `DataStreamRequest`.
+    @discardableResult
+    public func responseStreamDecodable<T: Decodable>(of type: T.Type = T.self,
+                                                      on queue: DispatchQueue = .main,
+                                                      using decoder: DataDecoder = JSONDecoder(),
+                                                      preprocessor: DataPreprocessor = PassthroughPreprocessor(),
+                                                      stream: @escaping Handler<T, AFError>) -> Self {
+        responseStream(using: DecodableStreamSerializer<T>(decoder: decoder, dataPreprocessor: preprocessor),
+                       stream: stream)
+    }
+}

Pods/Alamofire/Source/Result+Alamofire.swift

@@ -0,0 +1,120 @@
+//
+//  Result+Alamofire.swift
+//
+//  Copyright (c) 2019 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Default type of `Result` returned by Alamofire, with an `AFError` `Failure` type.
+public typealias AFResult<Success> = Result<Success, AFError>
+
+// MARK: - Internal APIs
+
+extension Result {
+    /// Returns whether the instance is `.success`.
+    var isSuccess: Bool {
+        guard case .success = self else { return false }
+        return true
+    }
+
+    /// Returns whether the instance is `.failure`.
+    var isFailure: Bool {
+        !isSuccess
+    }
+
+    /// Returns the associated value if the result is a success, `nil` otherwise.
+    var success: Success? {
+        guard case let .success(value) = self else { return nil }
+        return value
+    }
+
+    /// Returns the associated error value if the result is a failure, `nil` otherwise.
+    var failure: Failure? {
+        guard case let .failure(error) = self else { return nil }
+        return error
+    }
+
+    /// Initializes a `Result` from value or error. Returns `.failure` if the error is non-nil, `.success` otherwise.
+    ///
+    /// - Parameters:
+    ///   - value: A value.
+    ///   - error: An `Error`.
+    init(value: Success, error: Failure?) {
+        if let error = error {
+            self = .failure(error)
+        } else {
+            self = .success(value)
+        }
+    }
+
+    /// Evaluates the specified closure when the `Result` is a success, passing the unwrapped value as a parameter.
+    ///
+    /// Use the `tryMap` method with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: Result<Data, Error> = .success(Data(...))
+    ///     let possibleObject = possibleData.tryMap {
+    ///         try JSONSerialization.jsonObject(with: $0)
+    ///     }
+    ///
+    /// - parameter transform: A closure that takes the success value of the instance.
+    ///
+    /// - returns: A `Result` containing the result of the given closure. If this instance is a failure, returns the
+    ///            same failure.
+    func tryMap<NewSuccess>(_ transform: (Success) throws -> NewSuccess) -> Result<NewSuccess, Error> {
+        switch self {
+        case let .success(value):
+            do {
+                return try .success(transform(value))
+            } catch {
+                return .failure(error)
+            }
+        case let .failure(error):
+            return .failure(error)
+        }
+    }
+
+    /// Evaluates the specified closure when the `Result` is a failure, passing the unwrapped error as a parameter.
+    ///
+    /// Use the `tryMapError` function with a closure that may throw an error. For example:
+    ///
+    ///     let possibleData: Result<Data, Error> = .success(Data(...))
+    ///     let possibleObject = possibleData.tryMapError {
+    ///         try someFailableFunction(taking: $0)
+    ///     }
+    ///
+    /// - Parameter transform: A throwing closure that takes the error of the instance.
+    ///
+    /// - Returns: A `Result` instance containing the result of the transform. If this instance is a success, returns
+    ///            the same success.
+    func tryMapError<NewFailure: Error>(_ transform: (Failure) throws -> NewFailure) -> Result<Success, Error> {
+        switch self {
+        case let .failure(error):
+            do {
+                return try .failure(transform(error))
+            } catch {
+                return .failure(error)
+            }
+        case let .success(value):
+            return .success(value)
+        }
+    }
+}

Pods/Alamofire/Source/RetryPolicy.swift

@@ -0,0 +1,370 @@
+//
+//  RetryPolicy.swift
+//
+//  Copyright (c) 2019-2020 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// A retry policy that retries requests using an exponential backoff for allowed HTTP methods and HTTP status codes
+/// as well as certain types of networking errors.
+open class RetryPolicy: RequestInterceptor {
+    /// The default retry limit for retry policies.
+    public static let defaultRetryLimit: UInt = 2
+
+    /// The default exponential backoff base for retry policies (must be a minimum of 2).
+    public static let defaultExponentialBackoffBase: UInt = 2
+
+    /// The default exponential backoff scale for retry policies.
+    public static let defaultExponentialBackoffScale: Double = 0.5
+
+    /// The default HTTP methods to retry.
+    /// See [RFC 2616 - Section 9.1.2](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html) for more information.
+    public static let defaultRetryableHTTPMethods: Set<HTTPMethod> = [.delete, // [Delete](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.7) - not always idempotent
+                                                                      .get, // [GET](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.3) - generally idempotent
+                                                                      .head, // [HEAD](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.4) - generally idempotent
+                                                                      .options, // [OPTIONS](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.2) - inherently idempotent
+                                                                      .put, // [PUT](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.6) - not always idempotent
+                                                                      .trace // [TRACE](https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.8) - inherently idempotent
+    ]
+
+    /// The default HTTP status codes to retry.
+    /// See [RFC 2616 - Section 10](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10) for more information.
+    public static let defaultRetryableHTTPStatusCodes: Set<Int> = [408, // [Request Timeout](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.9)
+                                                                   500, // [Internal Server Error](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.5.1)
+                                                                   502, // [Bad Gateway](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.5.3)
+                                                                   503, // [Service Unavailable](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.5.4)
+                                                                   504 // [Gateway Timeout](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.5.5)
+    ]
+
+    /// The default URL error codes to retry.
+    public static let defaultRetryableURLErrorCodes: Set<URLError.Code> = [// [Security] App Transport Security disallowed a connection because there is no secure network connection.
+        //   - [Disabled] ATS settings do not change at runtime.
+        // .appTransportSecurityRequiresSecureConnection,
+
+        // [System] An app or app extension attempted to connect to a background session that is already connected to a
+        // process.
+        //   - [Enabled] The other process could release the background session.
+        .backgroundSessionInUseByAnotherProcess,
+
+        // [System] The shared container identifier of the URL session configuration is needed but has not been set.
+        //   - [Disabled] Cannot change at runtime.
+        // .backgroundSessionRequiresSharedContainer,
+
+        // [System] The app is suspended or exits while a background data task is processing.
+        //   - [Enabled] App can be foregrounded or launched to recover.
+        .backgroundSessionWasDisconnected,
+
+        // [Network] The URL Loading system received bad data from the server.
+        //   - [Enabled] Server could return valid data when retrying.
+        .badServerResponse,
+
+        // [Resource] A malformed URL prevented a URL request from being initiated.
+        //   - [Disabled] URL was most likely constructed incorrectly.
+        // .badURL,
+
+        // [System] A connection was attempted while a phone call is active on a network that does not support
+        // simultaneous phone and data communication (EDGE or GPRS).
+        //   - [Enabled] Phone call could be ended to allow request to recover.
+        .callIsActive,
+
+        // [Client] An asynchronous load has been canceled.
+        //   - [Disabled] Request was cancelled by the client.
+        // .cancelled,
+
+        // [File System] A download task couldn’t close the downloaded file on disk.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .cannotCloseFile,
+
+        // [Network] An attempt to connect to a host failed.
+        //   - [Enabled] Server or DNS lookup could recover during retry.
+        .cannotConnectToHost,
+
+        // [File System] A download task couldn’t create the downloaded file on disk because of an I/O failure.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .cannotCreateFile,
+
+        // [Data] Content data received during a connection request had an unknown content encoding.
+        //   - [Disabled] Server is unlikely to modify the content encoding during a retry.
+        // .cannotDecodeContentData,
+
+        // [Data] Content data received during a connection request could not be decoded for a known content encoding.
+        //   - [Disabled] Server is unlikely to modify the content encoding during a retry.
+        // .cannotDecodeRawData,
+
+        // [Network] The host name for a URL could not be resolved.
+        //   - [Enabled] Server or DNS lookup could recover during retry.
+        .cannotFindHost,
+
+        // [Network] A request to load an item only from the cache could not be satisfied.
+        //   - [Enabled] Cache could be populated during a retry.
+        .cannotLoadFromNetwork,
+
+        // [File System] A download task was unable to move a downloaded file on disk.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .cannotMoveFile,
+
+        // [File System] A download task was unable to open the downloaded file on disk.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .cannotOpenFile,
+
+        // [Data] A task could not parse a response.
+        //   - [Disabled] Invalid response is unlikely to recover with retry.
+        // .cannotParseResponse,
+
+        // [File System] A download task was unable to remove a downloaded file from disk.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .cannotRemoveFile,
+
+        // [File System] A download task was unable to write to the downloaded file on disk.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .cannotWriteToFile,
+
+        // [Security] A client certificate was rejected.
+        //   - [Disabled] Client certificate is unlikely to change with retry.
+        // .clientCertificateRejected,
+
+        // [Security] A client certificate was required to authenticate an SSL connection during a request.
+        //   - [Disabled] Client certificate is unlikely to be provided with retry.
+        // .clientCertificateRequired,
+
+        // [Data] The length of the resource data exceeds the maximum allowed.
+        //   - [Disabled] Resource will likely still exceed the length maximum on retry.
+        // .dataLengthExceedsMaximum,
+
+        // [System] The cellular network disallowed a connection.
+        //   - [Enabled] WiFi connection could be established during retry.
+        .dataNotAllowed,
+
+        // [Network] The host address could not be found via DNS lookup.
+        //   - [Enabled] DNS lookup could succeed during retry.
+        .dnsLookupFailed,
+
+        // [Data] A download task failed to decode an encoded file during the download.
+        //   - [Enabled] Server could correct the decoding issue with retry.
+        .downloadDecodingFailedMidStream,
+
+        // [Data] A download task failed to decode an encoded file after downloading.
+        //   - [Enabled] Server could correct the decoding issue with retry.
+        .downloadDecodingFailedToComplete,
+
+        // [File System] A file does not exist.
+        //   - [Disabled] File system error is unlikely to recover with retry.
+        // .fileDoesNotExist,
+
+        // [File System] A request for an FTP file resulted in the server responding that the file is not a plain file,
+        // but a directory.
+        //   - [Disabled] FTP directory is not likely to change to a file during a retry.
+        // .fileIsDirectory,
+
+        // [Network] A redirect loop has been detected or the threshold for number of allowable redirects has been
+        // exceeded (currently 16).
+        //   - [Disabled] The redirect loop is unlikely to be resolved within the retry window.
+        // .httpTooManyRedirects,
+
+        // [System] The attempted connection required activating a data context while roaming, but international roaming
+        // is disabled.
+        //   - [Enabled] WiFi connection could be established during retry.
+        .internationalRoamingOff,
+
+        // [Connectivity] A client or server connection was severed in the middle of an in-progress load.
+        //   - [Enabled] A network connection could be established during retry.
+        .networkConnectionLost,
+
+        // [File System] A resource couldn’t be read because of insufficient permissions.
+        //   - [Disabled] Permissions are unlikely to be granted during retry.
+        // .noPermissionsToReadFile,
+
+        // [Connectivity] A network resource was requested, but an internet connection has not been established and
+        // cannot be established automatically.
+        //   - [Enabled] A network connection could be established during retry.
+        .notConnectedToInternet,
+
+        // [Resource] A redirect was specified by way of server response code, but the server did not accompany this
+        // code with a redirect URL.
+        //   - [Disabled] The redirect URL is unlikely to be supplied during a retry.
+        // .redirectToNonExistentLocation,
+
+        // [Client] A body stream is needed but the client did not provide one.
+        //   - [Disabled] The client will be unlikely to supply a body stream during retry.
+        // .requestBodyStreamExhausted,
+
+        // [Resource] A requested resource couldn’t be retrieved.
+        //   - [Disabled] The resource is unlikely to become available during the retry window.
+        // .resourceUnavailable,
+
+        // [Security] An attempt to establish a secure connection failed for reasons that can’t be expressed more
+        // specifically.
+        //   - [Enabled] The secure connection could be established during a retry given the lack of specificity
+        //     provided by the error.
+        .secureConnectionFailed,
+
+        // [Security] A server certificate had a date which indicates it has expired, or is not yet valid.
+        //   - [Enabled] The server certificate could become valid within the retry window.
+        .serverCertificateHasBadDate,
+
+        // [Security] A server certificate was not signed by any root server.
+        //   - [Disabled] The server certificate is unlikely to change during the retry window.
+        // .serverCertificateHasUnknownRoot,
+
+        // [Security] A server certificate is not yet valid.
+        //   - [Enabled] The server certificate could become valid within the retry window.
+        .serverCertificateNotYetValid,
+
+        // [Security] A server certificate was signed by a root server that isn’t trusted.
+        //   - [Disabled] The server certificate is unlikely to become trusted within the retry window.
+        // .serverCertificateUntrusted,
+
+        // [Network] An asynchronous operation timed out.
+        //   - [Enabled] The request timed out for an unknown reason and should be retried.
+        .timedOut
+
+        // [System] The URL Loading System encountered an error that it can’t interpret.
+        //   - [Disabled] The error could not be interpreted and is unlikely to be recovered from during a retry.
+        // .unknown,
+
+        // [Resource] A properly formed URL couldn’t be handled by the framework.
+        //   - [Disabled] The URL is unlikely to change during a retry.
+        // .unsupportedURL,
+
+        // [Client] Authentication is required to access a resource.
+        //   - [Disabled] The user authentication is unlikely to be provided by retrying.
+        // .userAuthenticationRequired,
+
+        // [Client] An asynchronous request for authentication has been canceled by the user.
+        //   - [Disabled] The user cancelled authentication and explicitly took action to not retry.
+        // .userCancelledAuthentication,
+
+        // [Resource] A server reported that a URL has a non-zero content length, but terminated the network connection
+        // gracefully without sending any data.
+        //   - [Disabled] The server is unlikely to provide data during the retry window.
+        // .zeroByteResource,
+    ]
+
+    /// The total number of times the request is allowed to be retried.
+    public let retryLimit: UInt
+
+    /// The base of the exponential backoff policy (should always be greater than or equal to 2).
+    public let exponentialBackoffBase: UInt
+
+    /// The scale of the exponential backoff.
+    public let exponentialBackoffScale: Double
+
+    /// The HTTP methods that are allowed to be retried.
+    public let retryableHTTPMethods: Set<HTTPMethod>
+
+    /// The HTTP status codes that are automatically retried by the policy.
+    public let retryableHTTPStatusCodes: Set<Int>
+
+    /// The URL error codes that are automatically retried by the policy.
+    public let retryableURLErrorCodes: Set<URLError.Code>
+
+    /// Creates an `ExponentialBackoffRetryPolicy` from the specified parameters.
+    ///
+    /// - Parameters:
+    ///   - retryLimit:               The total number of times the request is allowed to be retried. `2` by default.
+    ///   - exponentialBackoffBase:   The base of the exponential backoff policy. `2` by default.
+    ///   - exponentialBackoffScale:  The scale of the exponential backoff. `0.5` by default.
+    ///   - retryableHTTPMethods:     The HTTP methods that are allowed to be retried.
+    ///                               `RetryPolicy.defaultRetryableHTTPMethods` by default.
+    ///   - retryableHTTPStatusCodes: The HTTP status codes that are automatically retried by the policy.
+    ///                               `RetryPolicy.defaultRetryableHTTPStatusCodes` by default.
+    ///   - retryableURLErrorCodes:   The URL error codes that are automatically retried by the policy.
+    ///                               `RetryPolicy.defaultRetryableURLErrorCodes` by default.
+    public init(retryLimit: UInt = RetryPolicy.defaultRetryLimit,
+                exponentialBackoffBase: UInt = RetryPolicy.defaultExponentialBackoffBase,
+                exponentialBackoffScale: Double = RetryPolicy.defaultExponentialBackoffScale,
+                retryableHTTPMethods: Set<HTTPMethod> = RetryPolicy.defaultRetryableHTTPMethods,
+                retryableHTTPStatusCodes: Set<Int> = RetryPolicy.defaultRetryableHTTPStatusCodes,
+                retryableURLErrorCodes: Set<URLError.Code> = RetryPolicy.defaultRetryableURLErrorCodes) {
+        precondition(exponentialBackoffBase >= 2, "The `exponentialBackoffBase` must be a minimum of 2.")
+
+        self.retryLimit = retryLimit
+        self.exponentialBackoffBase = exponentialBackoffBase
+        self.exponentialBackoffScale = exponentialBackoffScale
+        self.retryableHTTPMethods = retryableHTTPMethods
+        self.retryableHTTPStatusCodes = retryableHTTPStatusCodes
+        self.retryableURLErrorCodes = retryableURLErrorCodes
+    }
+
+    open func retry(_ request: Request,
+                    for session: Session,
+                    dueTo error: Error,
+                    completion: @escaping (RetryResult) -> Void) {
+        if request.retryCount < retryLimit, shouldRetry(request: request, dueTo: error) {
+            completion(.retryWithDelay(pow(Double(exponentialBackoffBase), Double(request.retryCount)) * exponentialBackoffScale))
+        } else {
+            completion(.doNotRetry)
+        }
+    }
+
+    /// Determines whether or not to retry the provided `Request`.
+    ///
+    /// - Parameters:
+    ///     - request: `Request` that failed due to the provided `Error`.
+    ///     - error:   `Error` encountered while executing the `Request`.
+    ///
+    /// - Returns:     `Bool` determining whether or not to retry the `Request`.
+    open func shouldRetry(request: Request, dueTo error: Error) -> Bool {
+        guard let httpMethod = request.request?.method, retryableHTTPMethods.contains(httpMethod) else { return false }
+
+        if let statusCode = request.response?.statusCode, retryableHTTPStatusCodes.contains(statusCode) {
+            return true
+        } else {
+            let errorCode = (error as? URLError)?.code
+            let afErrorCode = (error.asAFError?.underlyingError as? URLError)?.code
+
+            guard let code = errorCode ?? afErrorCode else { return false }
+
+            return retryableURLErrorCodes.contains(code)
+        }
+    }
+}
+
+// MARK: -
+
+/// A retry policy that automatically retries idempotent requests for network connection lost errors. For more
+/// information about retrying network connection lost errors, please refer to Apple's
+/// [technical document](https://developer.apple.com/library/content/qa/qa1941/_index.html).
+open class ConnectionLostRetryPolicy: RetryPolicy {
+    /// Creates a `ConnectionLostRetryPolicy` instance from the specified parameters.
+    ///
+    /// - Parameters:
+    ///   - retryLimit:              The total number of times the request is allowed to be retried.
+    ///                              `RetryPolicy.defaultRetryLimit` by default.
+    ///   - exponentialBackoffBase:  The base of the exponential backoff policy.
+    ///                              `RetryPolicy.defaultExponentialBackoffBase` by default.
+    ///   - exponentialBackoffScale: The scale of the exponential backoff.
+    ///                              `RetryPolicy.defaultExponentialBackoffScale` by default.
+    ///   - retryableHTTPMethods:    The idempotent http methods to retry.
+    ///                              `RetryPolicy.defaultRetryableHTTPMethods` by default.
+    public init(retryLimit: UInt = RetryPolicy.defaultRetryLimit,
+                exponentialBackoffBase: UInt = RetryPolicy.defaultExponentialBackoffBase,
+                exponentialBackoffScale: Double = RetryPolicy.defaultExponentialBackoffScale,
+                retryableHTTPMethods: Set<HTTPMethod> = RetryPolicy.defaultRetryableHTTPMethods) {
+        super.init(retryLimit: retryLimit,
+                   exponentialBackoffBase: exponentialBackoffBase,
+                   exponentialBackoffScale: exponentialBackoffScale,
+                   retryableHTTPMethods: retryableHTTPMethods,
+                   retryableHTTPStatusCodes: [],
+                   retryableURLErrorCodes: [.networkConnectionLost])
+    }
+}

Pods/Alamofire/Source/ServerTrustEvaluation.swift

@@ -0,0 +1,619 @@
+//
+//  ServerTrustPolicy.swift
+//
+//  Copyright (c) 2014-2016 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Responsible for managing the mapping of `ServerTrustEvaluating` values to given hosts.
+open class ServerTrustManager {
+    /// Determines whether all hosts for this `ServerTrustManager` must be evaluated. `true` by default.
+    public let allHostsMustBeEvaluated: Bool
+
+    /// The dictionary of policies mapped to a particular host.
+    public let evaluators: [String: ServerTrustEvaluating]
+
+    /// Initializes the `ServerTrustManager` instance with the given evaluators.
+    ///
+    /// Since different servers and web services can have different leaf certificates, intermediate and even root
+    /// certificates, it is important to have the flexibility to specify evaluation policies on a per host basis. This
+    /// allows for scenarios such as using default evaluation for host1, certificate pinning for host2, public key
+    /// pinning for host3 and disabling evaluation for host4.
+    ///
+    /// - Parameters:
+    ///   - allHostsMustBeEvaluated: The value determining whether all hosts for this instance must be evaluated. `true`
+    ///                              by default.
+    ///   - evaluators:              A dictionary of evaluators mapped to hosts.
+    public init(allHostsMustBeEvaluated: Bool = true, evaluators: [String: ServerTrustEvaluating]) {
+        self.allHostsMustBeEvaluated = allHostsMustBeEvaluated
+        self.evaluators = evaluators
+    }
+
+    /// Returns the `ServerTrustEvaluating` value for the given host, if one is set.
+    ///
+    /// By default, this method will return the policy that perfectly matches the given host. Subclasses could override
+    /// this method and implement more complex mapping implementations such as wildcards.
+    ///
+    /// - Parameter host: The host to use when searching for a matching policy.
+    ///
+    /// - Returns:        The `ServerTrustEvaluating` value for the given host if found, `nil` otherwise.
+    /// - Throws:         `AFError.serverTrustEvaluationFailed` if `allHostsMustBeEvaluated` is `true` and no matching
+    ///                   evaluators are found.
+    open func serverTrustEvaluator(forHost host: String) throws -> ServerTrustEvaluating? {
+        guard let evaluator = evaluators[host] else {
+            if allHostsMustBeEvaluated {
+                throw AFError.serverTrustEvaluationFailed(reason: .noRequiredEvaluator(host: host))
+            }
+
+            return nil
+        }
+
+        return evaluator
+    }
+}
+
+/// A protocol describing the API used to evaluate server trusts.
+public protocol ServerTrustEvaluating {
+    #if os(Linux)
+    // Implement this once Linux has API for evaluating server trusts.
+    #else
+    /// Evaluates the given `SecTrust` value for the given `host`.
+    ///
+    /// - Parameters:
+    ///   - trust: The `SecTrust` value to evaluate.
+    ///   - host:  The host for which to evaluate the `SecTrust` value.
+    ///
+    /// - Returns: A `Bool` indicating whether the evaluator considers the `SecTrust` value valid for `host`.
+    func evaluate(_ trust: SecTrust, forHost host: String) throws
+    #endif
+}
+
+// MARK: - Server Trust Evaluators
+
+/// An evaluator which uses the default server trust evaluation while allowing you to control whether to validate the
+/// host provided by the challenge. Applications are encouraged to always validate the host in production environments
+/// to guarantee the validity of the server's certificate chain.
+public final class DefaultTrustEvaluator: ServerTrustEvaluating {
+    private let validateHost: Bool
+
+    /// Creates a `DefaultTrustEvaluator`.
+    ///
+    /// - Parameter validateHost: Determines whether or not the evaluator should validate the host. `true` by default.
+    public init(validateHost: Bool = true) {
+        self.validateHost = validateHost
+    }
+
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {
+        if validateHost {
+            try trust.af.performValidation(forHost: host)
+        }
+
+        try trust.af.performDefaultValidation(forHost: host)
+    }
+}
+
+/// An evaluator which Uses the default and revoked server trust evaluations allowing you to control whether to validate
+/// the host provided by the challenge as well as specify the revocation flags for testing for revoked certificates.
+/// Apple platforms did not start testing for revoked certificates automatically until iOS 10.1, macOS 10.12 and tvOS
+/// 10.1 which is demonstrated in our TLS tests. Applications are encouraged to always validate the host in production
+/// environments to guarantee the validity of the server's certificate chain.
+public final class RevocationTrustEvaluator: ServerTrustEvaluating {
+    /// Represents the options to be use when evaluating the status of a certificate.
+    /// Only Revocation Policy Constants are valid, and can be found in [Apple's documentation](https://developer.apple.com/documentation/security/certificate_key_and_trust_services/policies/1563600-revocation_policy_constants).
+    public struct Options: OptionSet {
+        /// Perform revocation checking using the CRL (Certification Revocation List) method.
+        public static let crl = Options(rawValue: kSecRevocationCRLMethod)
+        /// Consult only locally cached replies; do not use network access.
+        public static let networkAccessDisabled = Options(rawValue: kSecRevocationNetworkAccessDisabled)
+        /// Perform revocation checking using OCSP (Online Certificate Status Protocol).
+        public static let ocsp = Options(rawValue: kSecRevocationOCSPMethod)
+        /// Prefer CRL revocation checking over OCSP; by default, OCSP is preferred.
+        public static let preferCRL = Options(rawValue: kSecRevocationPreferCRL)
+        /// Require a positive response to pass the policy. If the flag is not set, revocation checking is done on a
+        /// "best attempt" basis, where failure to reach the server is not considered fatal.
+        public static let requirePositiveResponse = Options(rawValue: kSecRevocationRequirePositiveResponse)
+        /// Perform either OCSP or CRL checking. The checking is performed according to the method(s) specified in the
+        /// certificate and the value of `preferCRL`.
+        public static let any = Options(rawValue: kSecRevocationUseAnyAvailableMethod)
+
+        /// The raw value of the option.
+        public let rawValue: CFOptionFlags
+
+        /// Creates an `Options` value with the given `CFOptionFlags`.
+        ///
+        /// - Parameter rawValue: The `CFOptionFlags` value to initialize with.
+        public init(rawValue: CFOptionFlags) {
+            self.rawValue = rawValue
+        }
+    }
+
+    private let performDefaultValidation: Bool
+    private let validateHost: Bool
+    private let options: Options
+
+    /// Creates a `RevocationTrustEvaluator`.
+    ///
+    /// - Note: Default and host validation will fail when using this evaluator with self-signed certificates. Use
+    ///         `PinnedCertificatesTrustEvaluator` if you need to use self-signed certificates.
+    ///
+    /// - Parameters:
+    ///   - performDefaultValidation:     Determines whether default validation should be performed in addition to
+    ///                                   evaluating the pinned certificates. `true` by default.
+    ///   - validateHost:                 Determines whether or not the evaluator should validate the host, in addition
+    ///                                   to performing the default evaluation, even if `performDefaultValidation` is
+    ///                                   `false`. `true` by default.
+    ///   - options:                      The `Options` to use to check the revocation status of the certificate. `.any`
+    ///                                   by default.
+    public init(performDefaultValidation: Bool = true, validateHost: Bool = true, options: Options = .any) {
+        self.performDefaultValidation = performDefaultValidation
+        self.validateHost = validateHost
+        self.options = options
+    }
+
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {
+        if performDefaultValidation {
+            try trust.af.performDefaultValidation(forHost: host)
+        }
+
+        if validateHost {
+            try trust.af.performValidation(forHost: host)
+        }
+
+        if #available(iOS 12, macOS 10.14, tvOS 12, watchOS 5, *) {
+            try trust.af.evaluate(afterApplying: SecPolicy.af.revocation(options: options))
+        } else {
+            try trust.af.validate(policy: SecPolicy.af.revocation(options: options)) { status, result in
+                AFError.serverTrustEvaluationFailed(reason: .revocationCheckFailed(output: .init(host, trust, status, result), options: options))
+            }
+        }
+    }
+}
+
+/// Uses the pinned certificates to validate the server trust. The server trust is considered valid if one of the pinned
+/// certificates match one of the server certificates. By validating both the certificate chain and host, certificate
+/// pinning provides a very secure form of server trust validation mitigating most, if not all, MITM attacks.
+/// Applications are encouraged to always validate the host and require a valid certificate chain in production
+/// environments.
+public final class PinnedCertificatesTrustEvaluator: ServerTrustEvaluating {
+    private let certificates: [SecCertificate]
+    private let acceptSelfSignedCertificates: Bool
+    private let performDefaultValidation: Bool
+    private let validateHost: Bool
+
+    /// Creates a `PinnedCertificatesTrustEvaluator`.
+    ///
+    /// - Parameters:
+    ///   - certificates:                 The certificates to use to evaluate the trust. All `cer`, `crt`, and `der`
+    ///                                   certificates in `Bundle.main` by default.
+    ///   - acceptSelfSignedCertificates: Adds the provided certificates as anchors for the trust evaluation, allowing
+    ///                                   self-signed certificates to pass. `false` by default. THIS SETTING SHOULD BE
+    ///                                   FALSE IN PRODUCTION!
+    ///   - performDefaultValidation:     Determines whether default validation should be performed in addition to
+    ///                                   evaluating the pinned certificates. `true` by default.
+    ///   - validateHost:                 Determines whether or not the evaluator should validate the host, in addition
+    ///                                   to performing the default evaluation, even if `performDefaultValidation` is
+    ///                                   `false`. `true` by default.
+    public init(certificates: [SecCertificate] = Bundle.main.af.certificates,
+                acceptSelfSignedCertificates: Bool = false,
+                performDefaultValidation: Bool = true,
+                validateHost: Bool = true) {
+        self.certificates = certificates
+        self.acceptSelfSignedCertificates = acceptSelfSignedCertificates
+        self.performDefaultValidation = performDefaultValidation
+        self.validateHost = validateHost
+    }
+
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {
+        guard !certificates.isEmpty else {
+            throw AFError.serverTrustEvaluationFailed(reason: .noCertificatesFound)
+        }
+
+        if acceptSelfSignedCertificates {
+            try trust.af.setAnchorCertificates(certificates)
+        }
+
+        if performDefaultValidation {
+            try trust.af.performDefaultValidation(forHost: host)
+        }
+
+        if validateHost {
+            try trust.af.performValidation(forHost: host)
+        }
+
+        let serverCertificatesData = Set(trust.af.certificateData)
+        let pinnedCertificatesData = Set(certificates.af.data)
+        let pinnedCertificatesInServerData = !serverCertificatesData.isDisjoint(with: pinnedCertificatesData)
+        if !pinnedCertificatesInServerData {
+            throw AFError.serverTrustEvaluationFailed(reason: .certificatePinningFailed(host: host,
+                                                                                        trust: trust,
+                                                                                        pinnedCertificates: certificates,
+                                                                                        serverCertificates: trust.af.certificates))
+        }
+    }
+}
+
+/// Uses the pinned public keys to validate the server trust. The server trust is considered valid if one of the pinned
+/// public keys match one of the server certificate public keys. By validating both the certificate chain and host,
+/// public key pinning provides a very secure form of server trust validation mitigating most, if not all, MITM attacks.
+/// Applications are encouraged to always validate the host and require a valid certificate chain in production
+/// environments.
+public final class PublicKeysTrustEvaluator: ServerTrustEvaluating {
+    private let keys: [SecKey]
+    private let performDefaultValidation: Bool
+    private let validateHost: Bool
+
+    /// Creates a `PublicKeysTrustEvaluator`.
+    ///
+    /// - Note: Default and host validation will fail when using this evaluator with self-signed certificates. Use
+    ///         `PinnedCertificatesTrustEvaluator` if you need to use self-signed certificates.
+    ///
+    /// - Parameters:
+    ///   - keys:                     The `SecKey`s to use to validate public keys. Defaults to the public keys of all
+    ///                               certificates included in the main bundle.
+    ///   - performDefaultValidation: Determines whether default validation should be performed in addition to
+    ///                               evaluating the pinned certificates. `true` by default.
+    ///   - validateHost:             Determines whether or not the evaluator should validate the host, in addition to
+    ///                               performing the default evaluation, even if `performDefaultValidation` is `false`.
+    ///                               `true` by default.
+    public init(keys: [SecKey] = Bundle.main.af.publicKeys,
+                performDefaultValidation: Bool = true,
+                validateHost: Bool = true) {
+        self.keys = keys
+        self.performDefaultValidation = performDefaultValidation
+        self.validateHost = validateHost
+    }
+
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {
+        guard !keys.isEmpty else {
+            throw AFError.serverTrustEvaluationFailed(reason: .noPublicKeysFound)
+        }
+
+        if performDefaultValidation {
+            try trust.af.performDefaultValidation(forHost: host)
+        }
+
+        if validateHost {
+            try trust.af.performValidation(forHost: host)
+        }
+
+        let pinnedKeysInServerKeys: Bool = {
+            for serverPublicKey in trust.af.publicKeys {
+                for pinnedPublicKey in keys {
+                    if serverPublicKey == pinnedPublicKey {
+                        return true
+                    }
+                }
+            }
+            return false
+        }()
+
+        if !pinnedKeysInServerKeys {
+            throw AFError.serverTrustEvaluationFailed(reason: .publicKeyPinningFailed(host: host,
+                                                                                      trust: trust,
+                                                                                      pinnedKeys: keys,
+                                                                                      serverKeys: trust.af.publicKeys))
+        }
+    }
+}
+
+/// Uses the provided evaluators to validate the server trust. The trust is only considered valid if all of the
+/// evaluators consider it valid.
+public final class CompositeTrustEvaluator: ServerTrustEvaluating {
+    private let evaluators: [ServerTrustEvaluating]
+
+    /// Creates a `CompositeTrustEvaluator`.
+    ///
+    /// - Parameter evaluators: The `ServerTrustEvaluating` values used to evaluate the server trust.
+    public init(evaluators: [ServerTrustEvaluating]) {
+        self.evaluators = evaluators
+    }
+
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {
+        try evaluators.evaluate(trust, forHost: host)
+    }
+}
+
+/// Disables all evaluation which in turn will always consider any server trust as valid.
+///
+/// - Note: Instead of disabling server trust evaluation, it's a better idea to configure systems to properly trust test
+///         certificates, as outlined in [this Apple tech note](https://developer.apple.com/library/archive/qa/qa1948/_index.html).
+///
+/// **THIS EVALUATOR SHOULD NEVER BE USED IN PRODUCTION!**
+@available(*, deprecated, renamed: "DisabledTrustEvaluator", message: "DisabledEvaluator has been renamed DisabledTrustEvaluator.")
+public typealias DisabledEvaluator = DisabledTrustEvaluator
+
+/// Disables all evaluation which in turn will always consider any server trust as valid.
+///
+///
+/// - Note: Instead of disabling server trust evaluation, it's a better idea to configure systems to properly trust test
+///         certificates, as outlined in [this Apple tech note](https://developer.apple.com/library/archive/qa/qa1948/_index.html).
+///
+/// **THIS EVALUATOR SHOULD NEVER BE USED IN PRODUCTION!**
+public final class DisabledTrustEvaluator: ServerTrustEvaluating {
+    /// Creates an instance.
+    public init() {}
+
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {}
+}
+
+// MARK: - Extensions
+
+extension Array where Element == ServerTrustEvaluating {
+    #if os(Linux)
+    // Add this same convenience method for Linux.
+    #else
+    /// Evaluates the given `SecTrust` value for the given `host`.
+    ///
+    /// - Parameters:
+    ///   - trust: The `SecTrust` value to evaluate.
+    ///   - host:  The host for which to evaluate the `SecTrust` value.
+    ///
+    /// - Returns: Whether or not the evaluator considers the `SecTrust` value valid for `host`.
+    public func evaluate(_ trust: SecTrust, forHost host: String) throws {
+        for evaluator in self {
+            try evaluator.evaluate(trust, forHost: host)
+        }
+    }
+    #endif
+}
+
+extension Bundle: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType: Bundle {
+    /// Returns all valid `cer`, `crt`, and `der` certificates in the bundle.
+    public var certificates: [SecCertificate] {
+        paths(forResourcesOfTypes: [".cer", ".CER", ".crt", ".CRT", ".der", ".DER"]).compactMap { path in
+            guard
+                let certificateData = try? Data(contentsOf: URL(fileURLWithPath: path)) as CFData,
+                let certificate = SecCertificateCreateWithData(nil, certificateData) else { return nil }
+
+            return certificate
+        }
+    }
+
+    /// Returns all public keys for the valid certificates in the bundle.
+    public var publicKeys: [SecKey] {
+        certificates.af.publicKeys
+    }
+
+    /// Returns all pathnames for the resources identified by the provided file extensions.
+    ///
+    /// - Parameter types: The filename extensions locate.
+    ///
+    /// - Returns:         All pathnames for the given filename extensions.
+    public func paths(forResourcesOfTypes types: [String]) -> [String] {
+        Array(Set(types.flatMap { type.paths(forResourcesOfType: $0, inDirectory: nil) }))
+    }
+}
+
+extension SecTrust: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType == SecTrust {
+    /// Evaluates `self` after applying the `SecPolicy` value provided.
+    ///
+    /// - Parameter policy: The `SecPolicy` to apply to `self` before evaluation.
+    ///
+    /// - Throws:           Any `Error` from applying the `SecPolicy` or from evaluation.
+    @available(iOS 12, macOS 10.14, tvOS 12, watchOS 5, *)
+    public func evaluate(afterApplying policy: SecPolicy) throws {
+        try apply(policy: policy).af.evaluate()
+    }
+
+    /// Attempts to validate `self` using the `SecPolicy` provided and transforming any error produced using the closure passed.
+    ///
+    /// - Parameters:
+    ///   - policy:        The `SecPolicy` used to evaluate `self`.
+    ///   - errorProducer: The closure used transform the failed `OSStatus` and `SecTrustResultType`.
+    /// - Throws:          Any `Error` from applying the `policy`, or the result of `errorProducer` if validation fails.
+    @available(iOS, introduced: 10, deprecated: 12, renamed: "evaluate(afterApplying:)")
+    @available(macOS, introduced: 10.12, deprecated: 10.14, renamed: "evaluate(afterApplying:)")
+    @available(tvOS, introduced: 10, deprecated: 12, renamed: "evaluate(afterApplying:)")
+    @available(watchOS, introduced: 3, deprecated: 5, renamed: "evaluate(afterApplying:)")
+    public func validate(policy: SecPolicy, errorProducer: (_ status: OSStatus, _ result: SecTrustResultType) -> Error) throws {
+        try apply(policy: policy).af.validate(errorProducer: errorProducer)
+    }
+
+    /// Applies a `SecPolicy` to `self`, throwing if it fails.
+    ///
+    /// - Parameter policy: The `SecPolicy`.
+    ///
+    /// - Returns: `self`, with the policy applied.
+    /// - Throws: An `AFError.serverTrustEvaluationFailed` instance with a `.policyApplicationFailed` reason.
+    public func apply(policy: SecPolicy) throws -> SecTrust {
+        let status = SecTrustSetPolicies(type, policy)
+
+        guard status.af.isSuccess else {
+            throw AFError.serverTrustEvaluationFailed(reason: .policyApplicationFailed(trust: type,
+                                                                                       policy: policy,
+                                                                                       status: status))
+        }
+
+        return type
+    }
+
+    /// Evaluate `self`, throwing an `Error` if evaluation fails.
+    ///
+    /// - Throws: `AFError.serverTrustEvaluationFailed` with reason `.trustValidationFailed` and associated error from
+    ///           the underlying evaluation.
+    @available(iOS 12, macOS 10.14, tvOS 12, watchOS 5, *)
+    public func evaluate() throws {
+        var error: CFError?
+        let evaluationSucceeded = SecTrustEvaluateWithError(type, &error)
+
+        if !evaluationSucceeded {
+            throw AFError.serverTrustEvaluationFailed(reason: .trustEvaluationFailed(error: error))
+        }
+    }
+
+    /// Validate `self`, passing any failure values through `errorProducer`.
+    ///
+    /// - Parameter errorProducer: The closure used to transform the failed `OSStatus` and `SecTrustResultType` into an
+    ///                            `Error`.
+    /// - Throws:                  The `Error` produced by the `errorProducer` closure.
+    @available(iOS, introduced: 10, deprecated: 12, renamed: "evaluate()")
+    @available(macOS, introduced: 10.12, deprecated: 10.14, renamed: "evaluate()")
+    @available(tvOS, introduced: 10, deprecated: 12, renamed: "evaluate()")
+    @available(watchOS, introduced: 3, deprecated: 5, renamed: "evaluate()")
+    public func validate(errorProducer: (_ status: OSStatus, _ result: SecTrustResultType) -> Error) throws {
+        var result = SecTrustResultType.invalid
+        let status = SecTrustEvaluate(type, &result)
+
+        guard status.af.isSuccess && result.af.isSuccess else {
+            throw errorProducer(status, result)
+        }
+    }
+
+    /// Sets a custom certificate chain on `self`, allowing full validation of a self-signed certificate and its chain.
+    ///
+    /// - Parameter certificates: The `SecCertificate`s to add to the chain.
+    /// - Throws:                 Any error produced when applying the new certificate chain.
+    public func setAnchorCertificates(_ certificates: [SecCertificate]) throws {
+        // Add additional anchor certificates.
+        let status = SecTrustSetAnchorCertificates(type, certificates as CFArray)
+        guard status.af.isSuccess else {
+            throw AFError.serverTrustEvaluationFailed(reason: .settingAnchorCertificatesFailed(status: status,
+                                                                                               certificates: certificates))
+        }
+
+        // Trust only the set anchor certs.
+        let onlyStatus = SecTrustSetAnchorCertificatesOnly(type, true)
+        guard onlyStatus.af.isSuccess else {
+            throw AFError.serverTrustEvaluationFailed(reason: .settingAnchorCertificatesFailed(status: onlyStatus,
+                                                                                               certificates: certificates))
+        }
+    }
+
+    /// The public keys contained in `self`.
+    public var publicKeys: [SecKey] {
+        certificates.af.publicKeys
+    }
+
+    /// The `SecCertificate`s contained i `self`.
+    public var certificates: [SecCertificate] {
+        (0..<SecTrustGetCertificateCount(type)).compactMap { index in
+            SecTrustGetCertificateAtIndex(type, index)
+        }
+    }
+
+    /// The `Data` values for all certificates contained in `self`.
+    public var certificateData: [Data] {
+        certificates.af.data
+    }
+
+    /// Validates `self` after applying `SecPolicy.af.default`. This evaluation does not validate the hostname.
+    ///
+    /// - Parameter host: The hostname, used only in the error output if validation fails.
+    /// - Throws: An `AFError.serverTrustEvaluationFailed` instance with a `.defaultEvaluationFailed` reason.
+    public func performDefaultValidation(forHost host: String) throws {
+        if #available(iOS 12, macOS 10.14, tvOS 12, watchOS 5, *) {
+            try evaluate(afterApplying: SecPolicy.af.default)
+        } else {
+            try validate(policy: SecPolicy.af.default) { status, result in
+                AFError.serverTrustEvaluationFailed(reason: .defaultEvaluationFailed(output: .init(host, type, status, result)))
+            }
+        }
+    }
+
+    /// Validates `self` after applying `SecPolicy.af.hostname(host)`, which performs the default validation as well as
+    /// hostname validation.
+    ///
+    /// - Parameter host: The hostname to use in the validation.
+    /// - Throws:         An `AFError.serverTrustEvaluationFailed` instance with a `.defaultEvaluationFailed` reason.
+    public func performValidation(forHost host: String) throws {
+        if #available(iOS 12, macOS 10.14, tvOS 12, watchOS 5, *) {
+            try evaluate(afterApplying: SecPolicy.af.hostname(host))
+        } else {
+            try validate(policy: SecPolicy.af.hostname(host)) { status, result in
+                AFError.serverTrustEvaluationFailed(reason: .hostValidationFailed(output: .init(host, type, status, result)))
+            }
+        }
+    }
+}
+
+extension SecPolicy: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType == SecPolicy {
+    /// Creates a `SecPolicy` instance which will validate server certificates but not require a host name match.
+    public static let `default` = SecPolicyCreateSSL(true, nil)
+
+    /// Creates a `SecPolicy` instance which will validate server certificates and much match the provided hostname.
+    ///
+    /// - Parameter hostname: The hostname to validate against.
+    ///
+    /// - Returns:            The `SecPolicy`.
+    public static func hostname(_ hostname: String) -> SecPolicy {
+        SecPolicyCreateSSL(true, hostname as CFString)
+    }
+
+    /// Creates a `SecPolicy` which checks the revocation of certificates.
+    ///
+    /// - Parameter options: The `RevocationTrustEvaluator.Options` for evaluation.
+    ///
+    /// - Returns:           The `SecPolicy`.
+    /// - Throws:            An `AFError.serverTrustEvaluationFailed` error with reason `.revocationPolicyCreationFailed`
+    ///                      if the policy cannot be created.
+    public static func revocation(options: RevocationTrustEvaluator.Options) throws -> SecPolicy {
+        guard let policy = SecPolicyCreateRevocation(options.rawValue) else {
+            throw AFError.serverTrustEvaluationFailed(reason: .revocationPolicyCreationFailed)
+        }
+
+        return policy
+    }
+}
+
+extension Array: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType == [SecCertificate] {
+    /// All `Data` values for the contained `SecCertificate`s.
+    public var data: [Data] {
+        type.map { SecCertificateCopyData($0) as Data }
+    }
+
+    /// All public `SecKey` values for the contained `SecCertificate`s.
+    public var publicKeys: [SecKey] {
+        type.compactMap { $0.af.publicKey }
+    }
+}
+
+extension SecCertificate: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType == SecCertificate {
+    /// The public key for `self`, if it can be extracted.
+    public var publicKey: SecKey? {
+        let policy = SecPolicyCreateBasicX509()
+        var trust: SecTrust?
+        let trustCreationStatus = SecTrustCreateWithCertificates(type, policy, &trust)
+
+        guard let createdTrust = trust, trustCreationStatus == errSecSuccess else { return nil }
+
+        return SecTrustCopyPublicKey(createdTrust)
+    }
+}
+
+extension OSStatus: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType == OSStatus {
+    /// Returns whether `self` is `errSecSuccess`.
+    public var isSuccess: Bool { type == errSecSuccess }
+}
+
+extension SecTrustResultType: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType == SecTrustResultType {
+    /// Returns whether `self is `.unspecified` or `.proceed`.
+    public var isSuccess: Bool {
+        type == .unspecified || type == .proceed
+    }
+}

Pods/Alamofire/Source/Session.swift

@@ -0,0 +1,1258 @@
+//
+//  Session.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// `Session` creates and manages Alamofire's `Request` types during their lifetimes. It also provides common
+/// functionality for all `Request`s, including queuing, interception, trust management, redirect handling, and response
+/// cache handling.
+open class Session {
+    /// Shared singleton instance used by all `AF.request` APIs. Cannot be modified.
+    public static let `default` = Session()
+
+    /// Underlying `URLSession` used to create `URLSessionTasks` for this instance, and for which this instance's
+    /// `delegate` handles `URLSessionDelegate` callbacks.
+    ///
+    /// - Note: This instance should **NOT** be used to interact with the underlying `URLSessionTask`s. Doing so will
+    ///         break internal Alamofire logic that tracks those tasks.
+    ///
+    public let session: URLSession
+    /// Instance's `SessionDelegate`, which handles the `URLSessionDelegate` methods and `Request` interaction.
+    public let delegate: SessionDelegate
+    /// Root `DispatchQueue` for all internal callbacks and state update. **MUST** be a serial queue.
+    public let rootQueue: DispatchQueue
+    /// Value determining whether this instance automatically calls `resume()` on all created `Request`s.
+    public let startRequestsImmediately: Bool
+    /// `DispatchQueue` on which `URLRequest`s are created asynchronously. By default this queue uses `rootQueue` as its
+    /// `target`, but a separate queue can be used if request creation is determined to be a bottleneck. Always profile
+    /// and test before introducing an additional queue.
+    public let requestQueue: DispatchQueue
+    /// `DispatchQueue` passed to all `Request`s on which they perform their response serialization. By default this
+    /// queue uses `rootQueue` as its `target` but a separate queue can be used if response serialization is determined
+    /// to be a bottleneck. Always profile and test before introducing an additional queue.
+    public let serializationQueue: DispatchQueue
+    /// `RequestInterceptor` used for all `Request` created by the instance. `RequestInterceptor`s can also be set on a
+    /// per-`Request` basis, in which case the `Request`'s interceptor takes precedence over this value.
+    public let interceptor: RequestInterceptor?
+    /// `ServerTrustManager` instance used to evaluate all trust challenges and provide certificate and key pinning.
+    public let serverTrustManager: ServerTrustManager?
+    /// `RedirectHandler` instance used to provide customization for request redirection.
+    public let redirectHandler: RedirectHandler?
+    /// `CachedResponseHandler` instance used to provide customization of cached response handling.
+    public let cachedResponseHandler: CachedResponseHandler?
+    /// `CompositeEventMonitor` used to compose Alamofire's `defaultEventMonitors` and any passed `EventMonitor`s.
+    public let eventMonitor: CompositeEventMonitor
+    /// `EventMonitor`s included in all instances. `[AlamofireNotifications()]` by default.
+    public let defaultEventMonitors: [EventMonitor] = [AlamofireNotifications()]
+
+    /// Internal map between `Request`s and any `URLSessionTasks` that may be in flight for them.
+    var requestTaskMap = RequestTaskMap()
+    /// `Set` of currently active `Request`s.
+    var activeRequests: Set<Request> = []
+    /// Completion events awaiting `URLSessionTaskMetrics`.
+    var waitingCompletions: [URLSessionTask: () -> Void] = [:]
+
+    /// Creates a `Session` from a `URLSession` and other parameters.
+    ///
+    /// - Note: When passing a `URLSession`, you must create the `URLSession` with a specific `delegateQueue` value and
+    ///         pass the `delegateQueue`'s `underlyingQueue` as the `rootQueue` parameter of this initializer.
+    ///
+    /// - Parameters:
+    ///   - session:                  Underlying `URLSession` for this instance.
+    ///   - delegate:                 `SessionDelegate` that handles `session`'s delegate callbacks as well as `Request`
+    ///                               interaction.
+    ///   - rootQueue:                Root `DispatchQueue` for all internal callbacks and state updates. **MUST** be a
+    ///                               serial queue.
+    ///   - startRequestsImmediately: Determines whether this instance will automatically start all `Request`s. `true`
+    ///                               by default. If set to `false`, all `Request`s created must have `.resume()` called.
+    ///                               on them for them to start.
+    ///   - requestQueue:             `DispatchQueue` on which to perform `URLRequest` creation. By default this queue
+    ///                               will use the `rootQueue` as its `target`. A separate queue can be used if it's
+    ///                               determined request creation is a bottleneck, but that should only be done after
+    ///                               careful testing and profiling. `nil` by default.
+    ///   - serializationQueue:       `DispatchQueue` on which to perform all response serialization. By default this
+    ///                               queue will use the `rootQueue` as its `target`. A separate queue can be used if
+    ///                               it's determined response serialization is a bottleneck, but that should only be
+    ///                               done after careful testing and profiling. `nil` by default.
+    ///   - interceptor:              `RequestInterceptor` to be used for all `Request`s created by this instance. `nil`
+    ///                               by default.
+    ///   - serverTrustManager:       `ServerTrustManager` to be used for all trust evaluations by this instance. `nil`
+    ///                               by default.
+    ///   - redirectHandler:          `RedirectHandler` to be used by all `Request`s created by this instance. `nil` by
+    ///                               default.
+    ///   - cachedResponseHandler:    `CachedResponseHandler` to be used by all `Request`s created by this instance.
+    ///                               `nil` by default.
+    ///   - eventMonitors:            Additional `EventMonitor`s used by the instance. Alamofire always adds a
+    ///                               `AlamofireNotifications` `EventMonitor` to the array passed here. `[]` by default.
+    public init(session: URLSession,
+                delegate: SessionDelegate,
+                rootQueue: DispatchQueue,
+                startRequestsImmediately: Bool = true,
+                requestQueue: DispatchQueue? = nil,
+                serializationQueue: DispatchQueue? = nil,
+                interceptor: RequestInterceptor? = nil,
+                serverTrustManager: ServerTrustManager? = nil,
+                redirectHandler: RedirectHandler? = nil,
+                cachedResponseHandler: CachedResponseHandler? = nil,
+                eventMonitors: [EventMonitor] = []) {
+        precondition(session.configuration.identifier == nil,
+                     "Alamofire does not support background URLSessionConfigurations.")
+        precondition(session.delegateQueue.underlyingQueue === rootQueue,
+                     "Session(session:) initializer must be passed the DispatchQueue used as the delegateQueue's underlyingQueue as rootQueue.")
+
+        self.session = session
+        self.delegate = delegate
+        self.rootQueue = rootQueue
+        self.startRequestsImmediately = startRequestsImmediately
+        self.requestQueue = requestQueue ?? DispatchQueue(label: "\(rootQueue.label).requestQueue", target: rootQueue)
+        self.serializationQueue = serializationQueue ?? DispatchQueue(label: "\(rootQueue.label).serializationQueue", target: rootQueue)
+        self.interceptor = interceptor
+        self.serverTrustManager = serverTrustManager
+        self.redirectHandler = redirectHandler
+        self.cachedResponseHandler = cachedResponseHandler
+        eventMonitor = CompositeEventMonitor(monitors: defaultEventMonitors + eventMonitors)
+        delegate.eventMonitor = eventMonitor
+        delegate.stateProvider = self
+    }
+
+    /// Creates a `Session` from a `URLSessionConfiguration`.
+    ///
+    /// - Note: This initializer lets Alamofire handle the creation of the underlying `URLSession` and its
+    ///         `delegateQueue`, and is the recommended initializer for most uses.
+    ///
+    /// - Parameters:
+    ///   - configuration:            `URLSessionConfiguration` to be used to create the underlying `URLSession`. Changes
+    ///                               to this value after being passed to this initializer will have no effect.
+    ///                               `URLSessionConfiguration.af.default` by default.
+    ///   - delegate:                 `SessionDelegate` that handles `session`'s delegate callbacks as well as `Request`
+    ///                               interaction. `SessionDelegate()` by default.
+    ///   - rootQueue:                Root `DispatchQueue` for all internal callbacks and state updates. **MUST** be a
+    ///                               serial queue. `DispatchQueue(label: "org.alamofire.session.rootQueue")` by default.
+    ///   - startRequestsImmediately: Determines whether this instance will automatically start all `Request`s. `true`
+    ///                               by default. If set to `false`, all `Request`s created must have `.resume()` called.
+    ///                               on them for them to start.
+    ///   - requestQueue:             `DispatchQueue` on which to perform `URLRequest` creation. By default this queue
+    ///                               will use the `rootQueue` as its `target`. A separate queue can be used if it's
+    ///                               determined request creation is a bottleneck, but that should only be done after
+    ///                               careful testing and profiling. `nil` by default.
+    ///   - serializationQueue:       `DispatchQueue` on which to perform all response serialization. By default this
+    ///                               queue will use the `rootQueue` as its `target`. A separate queue can be used if
+    ///                               it's determined response serialization is a bottleneck, but that should only be
+    ///                               done after careful testing and profiling. `nil` by default.
+    ///   - interceptor:              `RequestInterceptor` to be used for all `Request`s created by this instance. `nil`
+    ///                               by default.
+    ///   - serverTrustManager:       `ServerTrustManager` to be used for all trust evaluations by this instance. `nil`
+    ///                               by default.
+    ///   - redirectHandler:          `RedirectHandler` to be used by all `Request`s created by this instance. `nil` by
+    ///                               default.
+    ///   - cachedResponseHandler:    `CachedResponseHandler` to be used by all `Request`s created by this instance.
+    ///                               `nil` by default.
+    ///   - eventMonitors:            Additional `EventMonitor`s used by the instance. Alamofire always adds a
+    ///                               `AlamofireNotifications` `EventMonitor` to the array passed here. `[]` by default.
+    public convenience init(configuration: URLSessionConfiguration = URLSessionConfiguration.af.default,
+                            delegate: SessionDelegate = SessionDelegate(),
+                            rootQueue: DispatchQueue = DispatchQueue(label: "org.alamofire.session.rootQueue"),
+                            startRequestsImmediately: Bool = true,
+                            requestQueue: DispatchQueue? = nil,
+                            serializationQueue: DispatchQueue? = nil,
+                            interceptor: RequestInterceptor? = nil,
+                            serverTrustManager: ServerTrustManager? = nil,
+                            redirectHandler: RedirectHandler? = nil,
+                            cachedResponseHandler: CachedResponseHandler? = nil,
+                            eventMonitors: [EventMonitor] = []) {
+        precondition(configuration.identifier == nil, "Alamofire does not support background URLSessionConfigurations.")
+
+        let delegateQueue = OperationQueue(maxConcurrentOperationCount: 1, underlyingQueue: rootQueue, name: "org.alamofire.session.sessionDelegateQueue")
+        let session = URLSession(configuration: configuration, delegate: delegate, delegateQueue: delegateQueue)
+
+        self.init(session: session,
+                  delegate: delegate,
+                  rootQueue: rootQueue,
+                  startRequestsImmediately: startRequestsImmediately,
+                  requestQueue: requestQueue,
+                  serializationQueue: serializationQueue,
+                  interceptor: interceptor,
+                  serverTrustManager: serverTrustManager,
+                  redirectHandler: redirectHandler,
+                  cachedResponseHandler: cachedResponseHandler,
+                  eventMonitors: eventMonitors)
+    }
+
+    deinit {
+        finishRequestsForDeinit()
+        session.invalidateAndCancel()
+    }
+
+    // MARK: - All Requests API
+
+    /// Perform an action on all active `Request`s.
+    ///
+    /// - Note: The provided `action` closure is performed asynchronously, meaning that some `Request`s may complete and
+    ///         be unavailable by time it runs. Additionally, this action is performed on the instances's `rootQueue`,
+    ///         so care should be taken that actions are fast. Once the work on the `Request`s is complete, any
+    ///         additional work should be performed on another queue.
+    ///
+    /// - Parameters:
+    ///   - action:     Closure to perform with all `Request`s.
+    public func withAllRequests(perform action: @escaping (Set<Request>) -> Void) {
+        rootQueue.async {
+            action(self.activeRequests)
+        }
+    }
+
+    /// Cancel all active `Request`s, optionally calling a completion handler when complete.
+    ///
+    /// - Note: This is an asynchronous operation and does not block the creation of future `Request`s. Cancelled
+    ///         `Request`s may not cancel immediately due internal work, and may not cancel at all if they are close to
+    ///         completion when cancelled.
+    ///
+    /// - Parameters:
+    ///   - queue:      `DispatchQueue` on which the completion handler is run. `.main` by default.
+    ///   - completion: Closure to be called when all `Request`s have been cancelled.
+    public func cancelAllRequests(completingOnQueue queue: DispatchQueue = .main, completion: (() -> Void)? = nil) {
+        withAllRequests { requests in
+            requests.forEach { $0.cancel() }
+            queue.async {
+                completion?()
+            }
+        }
+    }
+
+    // MARK: - DataRequest
+
+    /// Closure which provides a `URLRequest` for mutation.
+    public typealias RequestModifier = (inout URLRequest) throws -> Void
+
+    struct RequestConvertible: URLRequestConvertible {
+        let url: URLConvertible
+        let method: HTTPMethod
+        let parameters: Parameters?
+        let encoding: ParameterEncoding
+        let headers: HTTPHeaders?
+        let requestModifier: RequestModifier?
+
+        func asURLRequest() throws -> URLRequest {
+            var request = try URLRequest(url: url, method: method, headers: headers)
+            try requestModifier?(&request)
+
+            return try encoding.encode(request, with: parameters)
+        }
+    }
+
+    /// Creates a `DataRequest` from a `URLRequest` created using the passed components and a `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible:     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:          `HTTPMethod` for the `URLRequest`. `.get` by default.
+    ///   - parameters:      `Parameters` (a.k.a. `[String: Any]`) value to be encoded into the `URLRequest`. `nil` by
+    ///                      default.
+    ///   - encoding:        `ParameterEncoding` to be used to encode the `parameters` value into the `URLRequest`.
+    ///                      `URLEncoding.default` by default.
+    ///   - headers:         `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:     `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - requestModifier: `RequestModifier` which will be applied to the `URLRequest` created from the provided
+    ///                      parameters. `nil` by default.
+    ///
+    /// - Returns:       The created `DataRequest`.
+    open func request(_ convertible: URLConvertible,
+                      method: HTTPMethod = .get,
+                      parameters: Parameters? = nil,
+                      encoding: ParameterEncoding = URLEncoding.default,
+                      headers: HTTPHeaders? = nil,
+                      interceptor: RequestInterceptor? = nil,
+                      requestModifier: RequestModifier? = nil) -> DataRequest {
+        let convertible = RequestConvertible(url: convertible,
+                                             method: method,
+                                             parameters: parameters,
+                                             encoding: encoding,
+                                             headers: headers,
+                                             requestModifier: requestModifier)
+
+        return request(convertible, interceptor: interceptor)
+    }
+
+    struct RequestEncodableConvertible<Parameters: Encodable>: URLRequestConvertible {
+        let url: URLConvertible
+        let method: HTTPMethod
+        let parameters: Parameters?
+        let encoder: ParameterEncoder
+        let headers: HTTPHeaders?
+        let requestModifier: RequestModifier?
+
+        func asURLRequest() throws -> URLRequest {
+            var request = try URLRequest(url: url, method: method, headers: headers)
+            try requestModifier?(&request)
+
+            return try parameters.map { try encoder.encode($0, into: request) } ?? request
+        }
+    }
+
+    /// Creates a `DataRequest` from a `URLRequest` created using the passed components, `Encodable` parameters, and a
+    /// `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible: `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:      `HTTPMethod` for the `URLRequest`. `.get` by default.
+    ///   - parameters:  `Encodable` value to be encoded into the `URLRequest`. `nil` by default.
+    ///   - encoder:     `ParameterEncoder` to be used to encode the `parameters` value into the `URLRequest`.
+    ///                  `URLEncodedFormParameterEncoder.default` by default.
+    ///   - headers:     `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///
+    /// - Returns:       The created `DataRequest`.
+    open func request<Parameters: Encodable>(_ convertible: URLConvertible,
+                                             method: HTTPMethod = .get,
+                                             parameters: Parameters? = nil,
+                                             encoder: ParameterEncoder = URLEncodedFormParameterEncoder.default,
+                                             headers: HTTPHeaders? = nil,
+                                             interceptor: RequestInterceptor? = nil,
+                                             requestModifier: RequestModifier? = nil) -> DataRequest {
+        let convertible = RequestEncodableConvertible(url: convertible,
+                                                      method: method,
+                                                      parameters: parameters,
+                                                      encoder: encoder,
+                                                      headers: headers,
+                                                      requestModifier: requestModifier)
+
+        return request(convertible, interceptor: interceptor)
+    }
+
+    /// Creates a `DataRequest` from a `URLRequestConvertible` value and a `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible: `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///
+    /// - Returns:       The created `DataRequest`.
+    open func request(_ convertible: URLRequestConvertible, interceptor: RequestInterceptor? = nil) -> DataRequest {
+        let request = DataRequest(convertible: convertible,
+                                  underlyingQueue: rootQueue,
+                                  serializationQueue: serializationQueue,
+                                  eventMonitor: eventMonitor,
+                                  interceptor: interceptor,
+                                  delegate: self)
+
+        perform(request)
+
+        return request
+    }
+
+    // MARK: - DataStreamRequest
+
+    /// Creates a `DataStreamRequest` from the passed components, `Encodable` parameters, and `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible:                      `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:                           `HTTPMethod` for the `URLRequest`. `.get` by default.
+    ///   - parameters:                       `Encodable` value to be encoded into the `URLRequest`. `nil` by default.
+    ///   - encoder:                          `ParameterEncoder` to be used to encode the `parameters` value into the
+    ///                                       `URLRequest`.
+    ///                                       `URLEncodedFormParameterEncoder.default` by default.
+    ///   - headers:                          `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - automaticallyCancelOnStreamError: `Bool` indicating whether the instance should be canceled when an `Error`
+    ///                                       is thrown while serializing stream `Data`. `false` by default.
+    ///   - interceptor:                      `RequestInterceptor` value to be used by the returned `DataRequest`. `nil`
+    ///                                       by default.
+    ///   - requestModifier:                  `RequestModifier` which will be applied to the `URLRequest` created from
+    ///                                       the provided parameters. `nil` by default.
+    ///
+    /// - Returns:       The created `DataStream` request.
+    open func streamRequest<Parameters: Encodable>(_ convertible: URLConvertible,
+                                                   method: HTTPMethod = .get,
+                                                   parameters: Parameters? = nil,
+                                                   encoder: ParameterEncoder = URLEncodedFormParameterEncoder.default,
+                                                   headers: HTTPHeaders? = nil,
+                                                   automaticallyCancelOnStreamError: Bool = false,
+                                                   interceptor: RequestInterceptor? = nil,
+                                                   requestModifier: RequestModifier? = nil) -> DataStreamRequest {
+        let convertible = RequestEncodableConvertible(url: convertible,
+                                                      method: method,
+                                                      parameters: parameters,
+                                                      encoder: encoder,
+                                                      headers: headers,
+                                                      requestModifier: requestModifier)
+
+        return streamRequest(convertible,
+                             automaticallyCancelOnStreamError: automaticallyCancelOnStreamError,
+                             interceptor: interceptor)
+    }
+
+    /// Creates a `DataStreamRequest` from the passed components and `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible:                      `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:                           `HTTPMethod` for the `URLRequest`. `.get` by default.
+    ///   - headers:                          `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - automaticallyCancelOnStreamError: `Bool` indicating whether the instance should be canceled when an `Error`
+    ///                                       is thrown while serializing stream `Data`. `false` by default.
+    ///   - interceptor:                      `RequestInterceptor` value to be used by the returned `DataRequest`. `nil`
+    ///                                       by default.
+    ///   - requestModifier:                  `RequestModifier` which will be applied to the `URLRequest` created from
+    ///                                       the provided parameters. `nil` by default.
+    ///
+    /// - Returns:       The created `DataStream` request.
+    open func streamRequest(_ convertible: URLConvertible,
+                            method: HTTPMethod = .get,
+                            headers: HTTPHeaders? = nil,
+                            automaticallyCancelOnStreamError: Bool = false,
+                            interceptor: RequestInterceptor? = nil,
+                            requestModifier: RequestModifier? = nil) -> DataStreamRequest {
+        let convertible = RequestEncodableConvertible(url: convertible,
+                                                      method: method,
+                                                      parameters: Empty?.none,
+                                                      encoder: URLEncodedFormParameterEncoder.default,
+                                                      headers: headers,
+                                                      requestModifier: requestModifier)
+
+        return streamRequest(convertible,
+                             automaticallyCancelOnStreamError: automaticallyCancelOnStreamError,
+                             interceptor: interceptor)
+    }
+
+    /// Creates a `DataStreamRequest` from the passed `URLRequestConvertible` value and `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible:                      `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - automaticallyCancelOnStreamError: `Bool` indicating whether the instance should be canceled when an `Error`
+    ///                                       is thrown while serializing stream `Data`. `false` by default.
+    ///   - interceptor:                      `RequestInterceptor` value to be used by the returned `DataRequest`. `nil`
+    ///                                        by default.
+    ///
+    /// - Returns:       The created `DataStreamRequest`.
+    open func streamRequest(_ convertible: URLRequestConvertible,
+                            automaticallyCancelOnStreamError: Bool = false,
+                            interceptor: RequestInterceptor? = nil) -> DataStreamRequest {
+        let request = DataStreamRequest(convertible: convertible,
+                                        automaticallyCancelOnStreamError: automaticallyCancelOnStreamError,
+                                        underlyingQueue: rootQueue,
+                                        serializationQueue: serializationQueue,
+                                        eventMonitor: eventMonitor,
+                                        interceptor: interceptor,
+                                        delegate: self)
+
+        perform(request)
+
+        return request
+    }
+
+    // MARK: - DownloadRequest
+
+    /// Creates a `DownloadRequest` using a `URLRequest` created using the passed components, `RequestInterceptor`, and
+    /// `Destination`.
+    ///
+    /// - Parameters:
+    ///   - convertible:     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:          `HTTPMethod` for the `URLRequest`. `.get` by default.
+    ///   - parameters:      `Parameters` (a.k.a. `[String: Any]`) value to be encoded into the `URLRequest`. `nil` by
+    ///                      default.
+    ///   - encoding:        `ParameterEncoding` to be used to encode the `parameters` value into the `URLRequest`.
+    ///                      Defaults to `URLEncoding.default`.
+    ///   - headers:         `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:     `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - requestModifier: `RequestModifier` which will be applied to the `URLRequest` created from the provided
+    ///                      parameters. `nil` by default.
+    ///   - destination:     `DownloadRequest.Destination` closure used to determine how and where the downloaded file
+    ///                      should be moved. `nil` by default.
+    ///
+    /// - Returns:           The created `DownloadRequest`.
+    open func download(_ convertible: URLConvertible,
+                       method: HTTPMethod = .get,
+                       parameters: Parameters? = nil,
+                       encoding: ParameterEncoding = URLEncoding.default,
+                       headers: HTTPHeaders? = nil,
+                       interceptor: RequestInterceptor? = nil,
+                       requestModifier: RequestModifier? = nil,
+                       to destination: DownloadRequest.Destination? = nil) -> DownloadRequest {
+        let convertible = RequestConvertible(url: convertible,
+                                             method: method,
+                                             parameters: parameters,
+                                             encoding: encoding,
+                                             headers: headers,
+                                             requestModifier: requestModifier)
+
+        return download(convertible, interceptor: interceptor, to: destination)
+    }
+
+    /// Creates a `DownloadRequest` from a `URLRequest` created using the passed components, `Encodable` parameters, and
+    /// a `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - convertible:     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:          `HTTPMethod` for the `URLRequest`. `.get` by default.
+    ///   - parameters:      Value conforming to `Encodable` to be encoded into the `URLRequest`. `nil` by default.
+    ///   - encoder:         `ParameterEncoder` to be used to encode the `parameters` value into the `URLRequest`.
+    ///                      Defaults to `URLEncodedFormParameterEncoder.default`.
+    ///   - headers:         `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:     `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - requestModifier: `RequestModifier` which will be applied to the `URLRequest` created from the provided
+    ///                      parameters. `nil` by default.
+    ///   - destination:     `DownloadRequest.Destination` closure used to determine how and where the downloaded file
+    ///                      should be moved. `nil` by default.
+    ///
+    /// - Returns:           The created `DownloadRequest`.
+    open func download<Parameters: Encodable>(_ convertible: URLConvertible,
+                                              method: HTTPMethod = .get,
+                                              parameters: Parameters? = nil,
+                                              encoder: ParameterEncoder = URLEncodedFormParameterEncoder.default,
+                                              headers: HTTPHeaders? = nil,
+                                              interceptor: RequestInterceptor? = nil,
+                                              requestModifier: RequestModifier? = nil,
+                                              to destination: DownloadRequest.Destination? = nil) -> DownloadRequest {
+        let convertible = RequestEncodableConvertible(url: convertible,
+                                                      method: method,
+                                                      parameters: parameters,
+                                                      encoder: encoder,
+                                                      headers: headers,
+                                                      requestModifier: requestModifier)
+
+        return download(convertible, interceptor: interceptor, to: destination)
+    }
+
+    /// Creates a `DownloadRequest` from a `URLRequestConvertible` value, a `RequestInterceptor`, and a `Destination`.
+    ///
+    /// - Parameters:
+    ///   - convertible: `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - destination: `DownloadRequest.Destination` closure used to determine how and where the downloaded file
+    ///                  should be moved. `nil` by default.
+    ///
+    /// - Returns:       The created `DownloadRequest`.
+    open func download(_ convertible: URLRequestConvertible,
+                       interceptor: RequestInterceptor? = nil,
+                       to destination: DownloadRequest.Destination? = nil) -> DownloadRequest {
+        let request = DownloadRequest(downloadable: .request(convertible),
+                                      underlyingQueue: rootQueue,
+                                      serializationQueue: serializationQueue,
+                                      eventMonitor: eventMonitor,
+                                      interceptor: interceptor,
+                                      delegate: self,
+                                      destination: destination ?? DownloadRequest.defaultDestination)
+
+        perform(request)
+
+        return request
+    }
+
+    /// Creates a `DownloadRequest` from the `resumeData` produced from a previously cancelled `DownloadRequest`, as
+    /// well as a `RequestInterceptor`, and a `Destination`.
+    ///
+    /// - Note: If `destination` is not specified, the download will be moved to a temporary location determined by
+    ///         Alamofire. The file will not be deleted until the system purges the temporary files.
+    ///
+    /// - Note: On some versions of all Apple platforms (iOS 10 - 10.2, macOS 10.12 - 10.12.2, tvOS 10 - 10.1, watchOS 3 - 3.1.1),
+    /// `resumeData` is broken on background URL session configurations. There's an underlying bug in the `resumeData`
+    /// generation logic where the data is written incorrectly and will always fail to resume the download. For more
+    /// information about the bug and possible workarounds, please refer to the [this Stack Overflow post](http://stackoverflow.com/a/39347461/1342462).
+    ///
+    /// - Parameters:
+    ///   - data:        The resume data from a previously cancelled `DownloadRequest` or `URLSessionDownloadTask`.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - destination: `DownloadRequest.Destination` closure used to determine how and where the downloaded file
+    ///                  should be moved. `nil` by default.
+    ///
+    /// - Returns:       The created `DownloadRequest`.
+    open func download(resumingWith data: Data,
+                       interceptor: RequestInterceptor? = nil,
+                       to destination: DownloadRequest.Destination? = nil) -> DownloadRequest {
+        let request = DownloadRequest(downloadable: .resumeData(data),
+                                      underlyingQueue: rootQueue,
+                                      serializationQueue: serializationQueue,
+                                      eventMonitor: eventMonitor,
+                                      interceptor: interceptor,
+                                      delegate: self,
+                                      destination: destination ?? DownloadRequest.defaultDestination)
+
+        perform(request)
+
+        return request
+    }
+
+    // MARK: - UploadRequest
+
+    struct ParameterlessRequestConvertible: URLRequestConvertible {
+        let url: URLConvertible
+        let method: HTTPMethod
+        let headers: HTTPHeaders?
+        let requestModifier: RequestModifier?
+
+        func asURLRequest() throws -> URLRequest {
+            var request = try URLRequest(url: url, method: method, headers: headers)
+            try requestModifier?(&request)
+
+            return request
+        }
+    }
+
+    struct Upload: UploadConvertible {
+        let request: URLRequestConvertible
+        let uploadable: UploadableConvertible
+
+        func createUploadable() throws -> UploadRequest.Uploadable {
+            try uploadable.createUploadable()
+        }
+
+        func asURLRequest() throws -> URLRequest {
+            try request.asURLRequest()
+        }
+    }
+
+    // MARK: Data
+
+    /// Creates an `UploadRequest` for the given `Data`, `URLRequest` components, and `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - data:            The `Data` to upload.
+    ///   - convertible:     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:          `HTTPMethod` for the `URLRequest`. `.post` by default.
+    ///   - headers:         `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:     `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager:     `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                      default.
+    ///   - requestModifier: `RequestModifier` which will be applied to the `URLRequest` created from the provided
+    ///                      parameters. `nil` by default.
+    ///
+    /// - Returns:           The created `UploadRequest`.
+    open func upload(_ data: Data,
+                     to convertible: URLConvertible,
+                     method: HTTPMethod = .post,
+                     headers: HTTPHeaders? = nil,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default,
+                     requestModifier: RequestModifier? = nil) -> UploadRequest {
+        let convertible = ParameterlessRequestConvertible(url: convertible,
+                                                          method: method,
+                                                          headers: headers,
+                                                          requestModifier: requestModifier)
+
+        return upload(data, with: convertible, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    /// Creates an `UploadRequest` for the given `Data` using the `URLRequestConvertible` value and `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - data:        The `Data` to upload.
+    ///   - convertible: `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager: `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                  default.
+    ///
+    /// - Returns:       The created `UploadRequest`.
+    open func upload(_ data: Data,
+                     with convertible: URLRequestConvertible,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default) -> UploadRequest {
+        upload(.data(data), with: convertible, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    // MARK: File
+
+    /// Creates an `UploadRequest` for the file at the given file `URL`, using a `URLRequest` from the provided
+    /// components and `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - fileURL:         The `URL` of the file to upload.
+    ///   - convertible:     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:          `HTTPMethod` for the `URLRequest`. `.post` by default.
+    ///   - headers:         `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:     `RequestInterceptor` value to be used by the returned `UploadRequest`. `nil` by default.
+    ///   - fileManager:     `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                      default.
+    ///   - requestModifier: `RequestModifier` which will be applied to the `URLRequest` created from the provided
+    ///                      parameters. `nil` by default.
+    ///
+    /// - Returns:           The created `UploadRequest`.
+    open func upload(_ fileURL: URL,
+                     to convertible: URLConvertible,
+                     method: HTTPMethod = .post,
+                     headers: HTTPHeaders? = nil,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default,
+                     requestModifier: RequestModifier? = nil) -> UploadRequest {
+        let convertible = ParameterlessRequestConvertible(url: convertible,
+                                                          method: method,
+                                                          headers: headers,
+                                                          requestModifier: requestModifier)
+
+        return upload(fileURL, with: convertible, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    /// Creates an `UploadRequest` for the file at the given file `URL` using the `URLRequestConvertible` value and
+    /// `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - fileURL:     The `URL` of the file to upload.
+    ///   - convertible: `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager: `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                  default.
+    ///
+    /// - Returns:       The created `UploadRequest`.
+    open func upload(_ fileURL: URL,
+                     with convertible: URLRequestConvertible,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default) -> UploadRequest {
+        upload(.file(fileURL, shouldRemove: false), with: convertible, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    // MARK: InputStream
+
+    /// Creates an `UploadRequest` from the `InputStream` provided using a `URLRequest` from the provided components and
+    /// `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - stream:          The `InputStream` that provides the data to upload.
+    ///   - convertible:     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - method:          `HTTPMethod` for the `URLRequest`. `.post` by default.
+    ///   - headers:         `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:     `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager:     `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                      default.
+    ///   - requestModifier: `RequestModifier` which will be applied to the `URLRequest` created from the provided
+    ///                      parameters. `nil` by default.
+    ///
+    /// - Returns:           The created `UploadRequest`.
+    open func upload(_ stream: InputStream,
+                     to convertible: URLConvertible,
+                     method: HTTPMethod = .post,
+                     headers: HTTPHeaders? = nil,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default,
+                     requestModifier: RequestModifier? = nil) -> UploadRequest {
+        let convertible = ParameterlessRequestConvertible(url: convertible,
+                                                          method: method,
+                                                          headers: headers,
+                                                          requestModifier: requestModifier)
+
+        return upload(stream, with: convertible, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    /// Creates an `UploadRequest` from the provided `InputStream` using the `URLRequestConvertible` value and
+    /// `RequestInterceptor`.
+    ///
+    /// - Parameters:
+    ///   - stream:      The `InputStream` that provides the data to upload.
+    ///   - convertible: `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - interceptor: `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager: `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                  default.
+    ///
+    /// - Returns:       The created `UploadRequest`.
+    open func upload(_ stream: InputStream,
+                     with convertible: URLRequestConvertible,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default) -> UploadRequest {
+        upload(.stream(stream), with: convertible, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    // MARK: MultipartFormData
+
+    /// Creates an `UploadRequest` for the multipart form data built using a closure and sent using the provided
+    /// `URLRequest` components and `RequestInterceptor`.
+    ///
+    /// It is important to understand the memory implications of uploading `MultipartFormData`. If the cumulative
+    /// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+    /// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+    /// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+    /// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+    /// used for larger payloads such as video content.
+    ///
+    /// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+    /// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+    /// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+    /// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+    /// technique was used.
+    ///
+    /// - Parameters:
+    ///   - multipartFormData:       `MultipartFormData` building closure.
+    ///   - convertible:             `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - encodingMemoryThreshold: Byte threshold used to determine whether the form data is encoded into memory or
+    ///                              onto disk before being uploaded. `MultipartFormData.encodingMemoryThreshold` by
+    ///                              default.
+    ///   - method:                  `HTTPMethod` for the `URLRequest`. `.post` by default.
+    ///   - headers:                 `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:             `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager:             `FileManager` to be used if the form data exceeds the memory threshold and is
+    ///                              written to disk before being uploaded. `.default` instance by default.
+    ///   - requestModifier:         `RequestModifier` which will be applied to the `URLRequest` created from the
+    ///                              provided parameters. `nil` by default.
+    ///
+    /// - Returns:                   The created `UploadRequest`.
+    open func upload(multipartFormData: @escaping (MultipartFormData) -> Void,
+                     to url: URLConvertible,
+                     usingThreshold encodingMemoryThreshold: UInt64 = MultipartFormData.encodingMemoryThreshold,
+                     method: HTTPMethod = .post,
+                     headers: HTTPHeaders? = nil,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default,
+                     requestModifier: RequestModifier? = nil) -> UploadRequest {
+        let convertible = ParameterlessRequestConvertible(url: url,
+                                                          method: method,
+                                                          headers: headers,
+                                                          requestModifier: requestModifier)
+
+        let formData = MultipartFormData(fileManager: fileManager)
+        multipartFormData(formData)
+
+        return upload(multipartFormData: formData,
+                      with: convertible,
+                      usingThreshold: encodingMemoryThreshold,
+                      interceptor: interceptor,
+                      fileManager: fileManager)
+    }
+
+    /// Creates an `UploadRequest` using a `MultipartFormData` building closure, the provided `URLRequestConvertible`
+    /// value, and a `RequestInterceptor`.
+    ///
+    /// It is important to understand the memory implications of uploading `MultipartFormData`. If the cumulative
+    /// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+    /// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+    /// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+    /// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+    /// used for larger payloads such as video content.
+    ///
+    /// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+    /// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+    /// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+    /// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+    /// technique was used.
+    ///
+    /// - Parameters:
+    ///   - multipartFormData:       `MultipartFormData` building closure.
+    ///   - request:                 `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - encodingMemoryThreshold: Byte threshold used to determine whether the form data is encoded into memory or
+    ///                              onto disk before being uploaded. `MultipartFormData.encodingMemoryThreshold` by
+    ///                              default.
+    ///   - interceptor:             `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager:             `FileManager` to be used if the form data exceeds the memory threshold and is
+    ///                              written to disk before being uploaded. `.default` instance by default.
+    ///
+    /// - Returns:                   The created `UploadRequest`.
+    open func upload(multipartFormData: @escaping (MultipartFormData) -> Void,
+                     with request: URLRequestConvertible,
+                     usingThreshold encodingMemoryThreshold: UInt64 = MultipartFormData.encodingMemoryThreshold,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default) -> UploadRequest {
+        let formData = MultipartFormData(fileManager: fileManager)
+        multipartFormData(formData)
+
+        return upload(multipartFormData: formData,
+                      with: request,
+                      usingThreshold: encodingMemoryThreshold,
+                      interceptor: interceptor,
+                      fileManager: fileManager)
+    }
+
+    /// Creates an `UploadRequest` for the prebuilt `MultipartFormData` value using the provided `URLRequest` components
+    /// and `RequestInterceptor`.
+    ///
+    /// It is important to understand the memory implications of uploading `MultipartFormData`. If the cumulative
+    /// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+    /// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+    /// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+    /// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+    /// used for larger payloads such as video content.
+    ///
+    /// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+    /// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+    /// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+    /// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+    /// technique was used.
+    ///
+    /// - Parameters:
+    ///   - multipartFormData:       `MultipartFormData` instance to upload.
+    ///   - url:                     `URLConvertible` value to be used as the `URLRequest`'s `URL`.
+    ///   - encodingMemoryThreshold: Byte threshold used to determine whether the form data is encoded into memory or
+    ///                              onto disk before being uploaded. `MultipartFormData.encodingMemoryThreshold` by
+    ///                              default.
+    ///   - method:                  `HTTPMethod` for the `URLRequest`. `.post` by default.
+    ///   - headers:                 `HTTPHeaders` value to be added to the `URLRequest`. `nil` by default.
+    ///   - interceptor:             `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager:             `FileManager` to be used if the form data exceeds the memory threshold and is
+    ///                              written to disk before being uploaded. `.default` instance by default.
+    ///   - requestModifier:         `RequestModifier` which will be applied to the `URLRequest` created from the
+    ///                              provided parameters. `nil` by default.
+    ///
+    /// - Returns:                   The created `UploadRequest`.
+    open func upload(multipartFormData: MultipartFormData,
+                     to url: URLConvertible,
+                     usingThreshold encodingMemoryThreshold: UInt64 = MultipartFormData.encodingMemoryThreshold,
+                     method: HTTPMethod = .post,
+                     headers: HTTPHeaders? = nil,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default,
+                     requestModifier: RequestModifier? = nil) -> UploadRequest {
+        let convertible = ParameterlessRequestConvertible(url: url,
+                                                          method: method,
+                                                          headers: headers,
+                                                          requestModifier: requestModifier)
+
+        let multipartUpload = MultipartUpload(encodingMemoryThreshold: encodingMemoryThreshold,
+                                              request: convertible,
+                                              multipartFormData: multipartFormData)
+
+        return upload(multipartUpload, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    /// Creates an `UploadRequest` for the prebuilt `MultipartFormData` value using the providing `URLRequestConvertible`
+    /// value and `RequestInterceptor`.
+    ///
+    /// It is important to understand the memory implications of uploading `MultipartFormData`. If the cumulative
+    /// payload is small, encoding the data in-memory and directly uploading to a server is the by far the most
+    /// efficient approach. However, if the payload is too large, encoding the data in-memory could cause your app to
+    /// be terminated. Larger payloads must first be written to disk using input and output streams to keep the memory
+    /// footprint low, then the data can be uploaded as a stream from the resulting file. Streaming from disk MUST be
+    /// used for larger payloads such as video content.
+    ///
+    /// The `encodingMemoryThreshold` parameter allows Alamofire to automatically determine whether to encode in-memory
+    /// or stream from disk. If the content length of the `MultipartFormData` is below the `encodingMemoryThreshold`,
+    /// encoding takes place in-memory. If the content length exceeds the threshold, the data is streamed to disk
+    /// during the encoding process. Then the result is uploaded as data or as a stream depending on which encoding
+    /// technique was used.
+    ///
+    /// - Parameters:
+    ///   - multipartFormData:       `MultipartFormData` instance to upload.
+    ///   - request:                 `URLRequestConvertible` value to be used to create the `URLRequest`.
+    ///   - encodingMemoryThreshold: Byte threshold used to determine whether the form data is encoded into memory or
+    ///                              onto disk before being uploaded. `MultipartFormData.encodingMemoryThreshold` by
+    ///                              default.
+    ///   - interceptor:             `RequestInterceptor` value to be used by the returned `DataRequest`. `nil` by default.
+    ///   - fileManager:             `FileManager` instance to be used by the returned `UploadRequest`. `.default` instance by
+    ///                              default.
+    ///
+    /// - Returns:                   The created `UploadRequest`.
+    open func upload(multipartFormData: MultipartFormData,
+                     with request: URLRequestConvertible,
+                     usingThreshold encodingMemoryThreshold: UInt64 = MultipartFormData.encodingMemoryThreshold,
+                     interceptor: RequestInterceptor? = nil,
+                     fileManager: FileManager = .default) -> UploadRequest {
+        let multipartUpload = MultipartUpload(encodingMemoryThreshold: encodingMemoryThreshold,
+                                              request: request,
+                                              multipartFormData: multipartFormData)
+
+        return upload(multipartUpload, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    // MARK: - Internal API
+
+    // MARK: Uploadable
+
+    func upload(_ uploadable: UploadRequest.Uploadable,
+                with convertible: URLRequestConvertible,
+                interceptor: RequestInterceptor?,
+                fileManager: FileManager) -> UploadRequest {
+        let uploadable = Upload(request: convertible, uploadable: uploadable)
+
+        return upload(uploadable, interceptor: interceptor, fileManager: fileManager)
+    }
+
+    func upload(_ upload: UploadConvertible, interceptor: RequestInterceptor?, fileManager: FileManager) -> UploadRequest {
+        let request = UploadRequest(convertible: upload,
+                                    underlyingQueue: rootQueue,
+                                    serializationQueue: serializationQueue,
+                                    eventMonitor: eventMonitor,
+                                    interceptor: interceptor,
+                                    fileManager: fileManager,
+                                    delegate: self)
+
+        perform(request)
+
+        return request
+    }
+
+    // MARK: Perform
+
+    /// Starts performing the provided `Request`.
+    ///
+    /// - Parameter request: The `Request` to perform.
+    func perform(_ request: Request) {
+        rootQueue.async {
+            guard !request.isCancelled else { return }
+
+            self.activeRequests.insert(request)
+
+            self.requestQueue.async {
+                // Leaf types must come first, otherwise they will cast as their superclass.
+                switch request {
+                case let r as UploadRequest: self.performUploadRequest(r) // UploadRequest must come before DataRequest due to subtype relationship.
+                case let r as DataRequest: self.performDataRequest(r)
+                case let r as DownloadRequest: self.performDownloadRequest(r)
+                case let r as DataStreamRequest: self.performDataStreamRequest(r)
+                default: fatalError("Attempted to perform unsupported Request subclass: \(type(of: request))")
+                }
+            }
+        }
+    }
+
+    func performDataRequest(_ request: DataRequest) {
+        dispatchPrecondition(condition: .onQueue(requestQueue))
+
+        performSetupOperations(for: request, convertible: request.convertible)
+    }
+
+    func performDataStreamRequest(_ request: DataStreamRequest) {
+        dispatchPrecondition(condition: .onQueue(requestQueue))
+
+        performSetupOperations(for: request, convertible: request.convertible)
+    }
+
+    func performUploadRequest(_ request: UploadRequest) {
+        dispatchPrecondition(condition: .onQueue(requestQueue))
+
+        performSetupOperations(for: request, convertible: request.convertible) {
+            do {
+                let uploadable = try request.upload.createUploadable()
+                self.rootQueue.async { request.didCreateUploadable(uploadable) }
+                return true
+            } catch {
+                self.rootQueue.async { request.didFailToCreateUploadable(with: error.asAFError(or: .createUploadableFailed(error: error))) }
+                return false
+            }
+        }
+    }
+
+    func performDownloadRequest(_ request: DownloadRequest) {
+        dispatchPrecondition(condition: .onQueue(requestQueue))
+
+        switch request.downloadable {
+        case let .request(convertible):
+            performSetupOperations(for: request, convertible: convertible)
+        case let .resumeData(resumeData):
+            rootQueue.async { self.didReceiveResumeData(resumeData, for: request) }
+        }
+    }
+
+    func performSetupOperations(for request: Request,
+                                convertible: URLRequestConvertible,
+                                shouldCreateTask: @escaping () -> Bool = { true })
+    {
+        dispatchPrecondition(condition: .onQueue(requestQueue))
+
+        let initialRequest: URLRequest
+
+        do {
+            initialRequest = try convertible.asURLRequest()
+            try initialRequest.validate()
+        } catch {
+            rootQueue.async { request.didFailToCreateURLRequest(with: error.asAFError(or: .createURLRequestFailed(error: error))) }
+            return
+        }
+
+        rootQueue.async { request.didCreateInitialURLRequest(initialRequest) }
+
+        guard !request.isCancelled else { return }
+
+        guard let adapter = adapter(for: request) else {
+            guard shouldCreateTask() else { return }
+            rootQueue.async { self.didCreateURLRequest(initialRequest, for: request) }
+            return
+        }
+
+        adapter.adapt(initialRequest, for: self) { result in
+            do {
+                let adaptedRequest = try result.get()
+                try adaptedRequest.validate()
+
+                self.rootQueue.async { request.didAdaptInitialRequest(initialRequest, to: adaptedRequest) }
+
+                guard shouldCreateTask() else { return }
+
+                self.rootQueue.async { self.didCreateURLRequest(adaptedRequest, for: request) }
+            } catch {
+                self.rootQueue.async { request.didFailToAdaptURLRequest(initialRequest, withError: .requestAdaptationFailed(error: error)) }
+            }
+        }
+    }
+
+    // MARK: - Task Handling
+
+    func didCreateURLRequest(_ urlRequest: URLRequest, for request: Request) {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        request.didCreateURLRequest(urlRequest)
+
+        guard !request.isCancelled else { return }
+
+        let task = request.task(for: urlRequest, using: session)
+        requestTaskMap[request] = task
+        request.didCreateTask(task)
+
+        updateStatesForTask(task, request: request)
+    }
+
+    func didReceiveResumeData(_ data: Data, for request: DownloadRequest) {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        guard !request.isCancelled else { return }
+
+        let task = request.task(forResumeData: data, using: session)
+        requestTaskMap[request] = task
+        request.didCreateTask(task)
+
+        updateStatesForTask(task, request: request)
+    }
+
+    func updateStatesForTask(_ task: URLSessionTask, request: Request) {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        request.withState { state in
+            switch state {
+            case .initialized, .finished:
+                // Do nothing.
+                break
+            case .resumed:
+                task.resume()
+                rootQueue.async { request.didResumeTask(task) }
+            case .suspended:
+                task.suspend()
+                rootQueue.async { request.didSuspendTask(task) }
+            case .cancelled:
+                // Resume to ensure metrics are gathered.
+                task.resume()
+                task.cancel()
+                rootQueue.async { request.didCancelTask(task) }
+            }
+        }
+    }
+
+    // MARK: - Adapters and Retriers
+
+    func adapter(for request: Request) -> RequestAdapter? {
+        if let requestInterceptor = request.interceptor, let sessionInterceptor = interceptor {
+            return Interceptor(adapters: [requestInterceptor, sessionInterceptor])
+        } else {
+            return request.interceptor ?? interceptor
+        }
+    }
+
+    func retrier(for request: Request) -> RequestRetrier? {
+        if let requestInterceptor = request.interceptor, let sessionInterceptor = interceptor {
+            return Interceptor(retriers: [requestInterceptor, sessionInterceptor])
+        } else {
+            return request.interceptor ?? interceptor
+        }
+    }
+
+    // MARK: - Invalidation
+
+    func finishRequestsForDeinit() {
+        requestTaskMap.requests.forEach { request in
+            rootQueue.async {
+                request.finish(error: AFError.sessionDeinitialized)
+            }
+        }
+    }
+}
+
+// MARK: - RequestDelegate
+
+extension Session: RequestDelegate {
+    public var sessionConfiguration: URLSessionConfiguration {
+        session.configuration
+    }
+
+    public var startImmediately: Bool { startRequestsImmediately }
+
+    public func cleanup(after request: Request) {
+        activeRequests.remove(request)
+    }
+
+    public func retryResult(for request: Request, dueTo error: AFError, completion: @escaping (RetryResult) -> Void) {
+        guard let retrier = retrier(for: request) else {
+            rootQueue.async { completion(.doNotRetry) }
+            return
+        }
+
+        retrier.retry(request, for: self, dueTo: error) { retryResult in
+            self.rootQueue.async {
+                guard let retryResultError = retryResult.error else { completion(retryResult); return }
+
+                let retryError = AFError.requestRetryFailed(retryError: retryResultError, originalError: error)
+                completion(.doNotRetryWithError(retryError))
+            }
+        }
+    }
+
+    public func retryRequest(_ request: Request, withDelay timeDelay: TimeInterval?) {
+        rootQueue.async {
+            let retry: () -> Void = {
+                guard !request.isCancelled else { return }
+
+                request.prepareForRetry()
+                self.perform(request)
+            }
+
+            if let retryDelay = timeDelay {
+                self.rootQueue.after(retryDelay) { retry() }
+            } else {
+                retry()
+            }
+        }
+    }
+}
+
+// MARK: - SessionStateProvider
+
+extension Session: SessionStateProvider {
+    func request(for task: URLSessionTask) -> Request? {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        return requestTaskMap[task]
+    }
+
+    func didGatherMetricsForTask(_ task: URLSessionTask) {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        let didDisassociate = requestTaskMap.disassociateIfNecessaryAfterGatheringMetricsForTask(task)
+
+        if didDisassociate {
+            waitingCompletions[task]?()
+            waitingCompletions[task] = nil
+        }
+    }
+
+    func didCompleteTask(_ task: URLSessionTask, completion: @escaping () -> Void) {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        let didDisassociate = requestTaskMap.disassociateIfNecessaryAfterCompletingTask(task)
+
+        if didDisassociate {
+            completion()
+        } else {
+            waitingCompletions[task] = completion
+        }
+    }
+
+    func credential(for task: URLSessionTask, in protectionSpace: URLProtectionSpace) -> URLCredential? {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        return requestTaskMap[task]?.credential ??
+            session.configuration.urlCredentialStorage?.defaultCredential(for: protectionSpace)
+    }
+
+    func cancelRequestsForSessionInvalidation(with error: Error?) {
+        dispatchPrecondition(condition: .onQueue(rootQueue))
+
+        requestTaskMap.requests.forEach { $0.finish(error: AFError.sessionInvalidated(error: error)) }
+    }
+}

Pods/Alamofire/Source/SessionDelegate.swift

@@ -0,0 +1,330 @@
+//
+//  SessionDelegate.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Class which implements the various `URLSessionDelegate` methods to connect various Alamofire features.
+open class SessionDelegate: NSObject {
+    private let fileManager: FileManager
+
+    weak var stateProvider: SessionStateProvider?
+    var eventMonitor: EventMonitor?
+
+    /// Creates an instance from the given `FileManager`.
+    ///
+    /// - Parameter fileManager: `FileManager` to use for underlying file management, such as moving downloaded files.
+    ///                          `.default` by default.
+    public init(fileManager: FileManager = .default) {
+        self.fileManager = fileManager
+    }
+
+    /// Internal method to find and cast requests while maintaining some integrity checking.
+    ///
+    /// - Parameters:
+    ///   - task: The `URLSessionTask` for which to find the associated `Request`.
+    ///   - type: The `Request` subclass type to cast any `Request` associate with `task`.
+    func request<R: Request>(for task: URLSessionTask, as type: R.Type) -> R? {
+        guard let provider = stateProvider else {
+            assertionFailure("StateProvider is nil.")
+            return nil
+        }
+
+        return provider.request(for: task) as? R
+    }
+}
+
+/// Type which provides various `Session` state values.
+protocol SessionStateProvider: AnyObject {
+    var serverTrustManager: ServerTrustManager? { get }
+    var redirectHandler: RedirectHandler? { get }
+    var cachedResponseHandler: CachedResponseHandler? { get }
+
+    func request(for task: URLSessionTask) -> Request?
+    func didGatherMetricsForTask(_ task: URLSessionTask)
+    func didCompleteTask(_ task: URLSessionTask, completion: @escaping () -> Void)
+    func credential(for task: URLSessionTask, in protectionSpace: URLProtectionSpace) -> URLCredential?
+    func cancelRequestsForSessionInvalidation(with error: Error?)
+}
+
+// MARK: URLSessionDelegate
+
+extension SessionDelegate: URLSessionDelegate {
+    open func urlSession(_ session: URLSession, didBecomeInvalidWithError error: Error?) {
+        eventMonitor?.urlSession(session, didBecomeInvalidWithError: error)
+
+        stateProvider?.cancelRequestsForSessionInvalidation(with: error)
+    }
+}
+
+// MARK: URLSessionTaskDelegate
+
+extension SessionDelegate: URLSessionTaskDelegate {
+    /// Result of a `URLAuthenticationChallenge` evaluation.
+    typealias ChallengeEvaluation = (disposition: URLSession.AuthChallengeDisposition, credential: URLCredential?, error: AFError?)
+
+    open func urlSession(_ session: URLSession,
+                         task: URLSessionTask,
+                         didReceive challenge: URLAuthenticationChallenge,
+                         completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
+        eventMonitor?.urlSession(session, task: task, didReceive: challenge)
+
+        let evaluation: ChallengeEvaluation
+        switch challenge.protectionSpace.authenticationMethod {
+        case NSURLAuthenticationMethodServerTrust:
+            evaluation = attemptServerTrustAuthentication(with: challenge)
+        case NSURLAuthenticationMethodHTTPBasic, NSURLAuthenticationMethodHTTPDigest, NSURLAuthenticationMethodNTLM,
+             NSURLAuthenticationMethodNegotiate, NSURLAuthenticationMethodClientCertificate:
+            evaluation = attemptCredentialAuthentication(for: challenge, belongingTo: task)
+        default:
+            evaluation = (.performDefaultHandling, nil, nil)
+        }
+
+        if let error = evaluation.error {
+            stateProvider?.request(for: task)?.didFailTask(task, earlyWithError: error)
+        }
+
+        completionHandler(evaluation.disposition, evaluation.credential)
+    }
+
+    /// Evaluates the server trust `URLAuthenticationChallenge` received.
+    ///
+    /// - Parameter challenge: The `URLAuthenticationChallenge`.
+    ///
+    /// - Returns:             The `ChallengeEvaluation`.
+    func attemptServerTrustAuthentication(with challenge: URLAuthenticationChallenge) -> ChallengeEvaluation {
+        let host = challenge.protectionSpace.host
+
+        guard challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust,
+              let trust = challenge.protectionSpace.serverTrust
+        else {
+            return (.performDefaultHandling, nil, nil)
+        }
+
+        do {
+            guard let evaluator = try stateProvider?.serverTrustManager?.serverTrustEvaluator(forHost: host) else {
+                return (.performDefaultHandling, nil, nil)
+            }
+
+            try evaluator.evaluate(trust, forHost: host)
+
+            return (.useCredential, URLCredential(trust: trust), nil)
+        } catch {
+            return (.cancelAuthenticationChallenge, nil, error.asAFError(or: .serverTrustEvaluationFailed(reason: .customEvaluationFailed(error: error))))
+        }
+    }
+
+    /// Evaluates the credential-based authentication `URLAuthenticationChallenge` received for `task`.
+    ///
+    /// - Parameters:
+    ///   - challenge: The `URLAuthenticationChallenge`.
+    ///   - task:      The `URLSessionTask` which received the challenge.
+    ///
+    /// - Returns:     The `ChallengeEvaluation`.
+    func attemptCredentialAuthentication(for challenge: URLAuthenticationChallenge,
+                                         belongingTo task: URLSessionTask) -> ChallengeEvaluation {
+        guard challenge.previousFailureCount == 0 else {
+            return (.rejectProtectionSpace, nil, nil)
+        }
+
+        guard let credential = stateProvider?.credential(for: task, in: challenge.protectionSpace) else {
+            return (.performDefaultHandling, nil, nil)
+        }
+
+        return (.useCredential, credential, nil)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         task: URLSessionTask,
+                         didSendBodyData bytesSent: Int64,
+                         totalBytesSent: Int64,
+                         totalBytesExpectedToSend: Int64) {
+        eventMonitor?.urlSession(session,
+                                 task: task,
+                                 didSendBodyData: bytesSent,
+                                 totalBytesSent: totalBytesSent,
+                                 totalBytesExpectedToSend: totalBytesExpectedToSend)
+
+        stateProvider?.request(for: task)?.updateUploadProgress(totalBytesSent: totalBytesSent,
+                                                                totalBytesExpectedToSend: totalBytesExpectedToSend)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         task: URLSessionTask,
+                         needNewBodyStream completionHandler: @escaping (InputStream?) -> Void) {
+        eventMonitor?.urlSession(session, taskNeedsNewBodyStream: task)
+
+        guard let request = request(for: task, as: UploadRequest.self) else {
+            assertionFailure("needNewBodyStream did not find UploadRequest.")
+            completionHandler(nil)
+            return
+        }
+
+        completionHandler(request.inputStream())
+    }
+
+    open func urlSession(_ session: URLSession,
+                         task: URLSessionTask,
+                         willPerformHTTPRedirection response: HTTPURLResponse,
+                         newRequest request: URLRequest,
+                         completionHandler: @escaping (URLRequest?) -> Void) {
+        eventMonitor?.urlSession(session, task: task, willPerformHTTPRedirection: response, newRequest: request)
+
+        if let redirectHandler = stateProvider?.request(for: task)?.redirectHandler ?? stateProvider?.redirectHandler {
+            redirectHandler.task(task, willBeRedirectedTo: request, for: response, completion: completionHandler)
+        } else {
+            completionHandler(request)
+        }
+    }
+
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics) {
+        eventMonitor?.urlSession(session, task: task, didFinishCollecting: metrics)
+
+        stateProvider?.request(for: task)?.didGatherMetrics(metrics)
+
+        stateProvider?.didGatherMetricsForTask(task)
+    }
+
+    open func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
+        eventMonitor?.urlSession(session, task: task, didCompleteWithError: error)
+
+        let request = stateProvider?.request(for: task)
+
+        stateProvider?.didCompleteTask(task) {
+            request?.didCompleteTask(task, with: error.map { $0.asAFError(or: .sessionTaskFailed(error: $0)) })
+        }
+    }
+
+    @available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
+    open func urlSession(_ session: URLSession, taskIsWaitingForConnectivity task: URLSessionTask) {
+        eventMonitor?.urlSession(session, taskIsWaitingForConnectivity: task)
+    }
+}
+
+// MARK: URLSessionDataDelegate
+
+extension SessionDelegate: URLSessionDataDelegate {
+    open func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
+        eventMonitor?.urlSession(session, dataTask: dataTask, didReceive: data)
+
+        if let request = request(for: dataTask, as: DataRequest.self) {
+            request.didReceive(data: data)
+        } else if let request = request(for: dataTask, as: DataStreamRequest.self) {
+            request.didReceive(data: data)
+        } else {
+            assertionFailure("dataTask did not find DataRequest or DataStreamRequest in didReceive")
+            return
+        }
+    }
+
+    open func urlSession(_ session: URLSession,
+                         dataTask: URLSessionDataTask,
+                         willCacheResponse proposedResponse: CachedURLResponse,
+                         completionHandler: @escaping (CachedURLResponse?) -> Void) {
+        eventMonitor?.urlSession(session, dataTask: dataTask, willCacheResponse: proposedResponse)
+
+        if let handler = stateProvider?.request(for: dataTask)?.cachedResponseHandler ?? stateProvider?.cachedResponseHandler {
+            handler.dataTask(dataTask, willCacheResponse: proposedResponse, completion: completionHandler)
+        } else {
+            completionHandler(proposedResponse)
+        }
+    }
+}
+
+// MARK: URLSessionDownloadDelegate
+
+extension SessionDelegate: URLSessionDownloadDelegate {
+    open func urlSession(_ session: URLSession,
+                         downloadTask: URLSessionDownloadTask,
+                         didResumeAtOffset fileOffset: Int64,
+                         expectedTotalBytes: Int64) {
+        eventMonitor?.urlSession(session,
+                                 downloadTask: downloadTask,
+                                 didResumeAtOffset: fileOffset,
+                                 expectedTotalBytes: expectedTotalBytes)
+        guard let downloadRequest = request(for: downloadTask, as: DownloadRequest.self) else {
+            assertionFailure("downloadTask did not find DownloadRequest.")
+            return
+        }
+
+        downloadRequest.updateDownloadProgress(bytesWritten: fileOffset,
+                                               totalBytesExpectedToWrite: expectedTotalBytes)
+    }
+
+    open func urlSession(_ session: URLSession,
+                         downloadTask: URLSessionDownloadTask,
+                         didWriteData bytesWritten: Int64,
+                         totalBytesWritten: Int64,
+                         totalBytesExpectedToWrite: Int64) {
+        eventMonitor?.urlSession(session,
+                                 downloadTask: downloadTask,
+                                 didWriteData: bytesWritten,
+                                 totalBytesWritten: totalBytesWritten,
+                                 totalBytesExpectedToWrite: totalBytesExpectedToWrite)
+        guard let downloadRequest = request(for: downloadTask, as: DownloadRequest.self) else {
+            assertionFailure("downloadTask did not find DownloadRequest.")
+            return
+        }
+
+        downloadRequest.updateDownloadProgress(bytesWritten: bytesWritten,
+                                               totalBytesExpectedToWrite: totalBytesExpectedToWrite)
+    }
+
+    open func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
+        eventMonitor?.urlSession(session, downloadTask: downloadTask, didFinishDownloadingTo: location)
+
+        guard let request = request(for: downloadTask, as: DownloadRequest.self) else {
+            assertionFailure("downloadTask did not find DownloadRequest.")
+            return
+        }
+
+        let (destination, options): (URL, DownloadRequest.Options)
+        if let response = request.response {
+            (destination, options) = request.destination(location, response)
+        } else {
+            // If there's no response this is likely a local file download, so generate the temporary URL directly.
+            (destination, options) = (DownloadRequest.defaultDestinationURL(location), [])
+        }
+
+        eventMonitor?.request(request, didCreateDestinationURL: destination)
+
+        do {
+            if options.contains(.removePreviousFile), fileManager.fileExists(atPath: destination.path) {
+                try fileManager.removeItem(at: destination)
+            }
+
+            if options.contains(.createIntermediateDirectories) {
+                let directory = destination.deletingLastPathComponent()
+                try fileManager.createDirectory(at: directory, withIntermediateDirectories: true)
+            }
+
+            try fileManager.moveItem(at: location, to: destination)
+
+            request.didFinishDownloading(using: downloadTask, with: .success(destination))
+        } catch {
+            request.didFinishDownloading(using: downloadTask, with: .failure(.downloadedFileMoveFailed(error: error,
+                                                                                                       source: location,
+                                                                                                       destination: destination)))
+        }
+    }
+}

Pods/Alamofire/Source/StringEncoding+Alamofire.swift

@@ -0,0 +1,55 @@
+//
+//  StringEncoding+Alamofire.swift
+//
+//  Copyright (c) 2020 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension String.Encoding {
+    /// Creates an encoding from the IANA charset name.
+    ///
+    /// - Notes: These mappings match those [provided by CoreFoundation](https://opensource.apple.com/source/CF/CF-476.18/CFStringUtilities.c.auto.html)
+    ///
+    /// - Parameter name: IANA charset name.
+    init?(ianaCharsetName name: String) {
+        switch name.lowercased() {
+        case "utf-8":
+            self = .utf8
+        case "iso-8859-1":
+            self = .isoLatin1
+        case "unicode-1-1", "iso-10646-ucs-2", "utf-16":
+            self = .utf16
+        case "utf-16be":
+            self = .utf16BigEndian
+        case "utf-16le":
+            self = .utf16LittleEndian
+        case "utf-32":
+            self = .utf32
+        case "utf-32be":
+            self = .utf32BigEndian
+        case "utf-32le":
+            self = .utf32LittleEndian
+        default:
+            return nil
+        }
+    }
+}

Pods/Alamofire/Source/URLConvertible+URLRequestConvertible.swift

@@ -0,0 +1,105 @@
+//
+//  URLConvertible+URLRequestConvertible.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// Types adopting the `URLConvertible` protocol can be used to construct `URL`s, which can then be used to construct
+/// `URLRequests`.
+public protocol URLConvertible {
+    /// Returns a `URL` from the conforming instance or throws.
+    ///
+    /// - Returns: The `URL` created from the instance.
+    /// - Throws:  Any error thrown while creating the `URL`.
+    func asURL() throws -> URL
+}
+
+extension String: URLConvertible {
+    /// Returns a `URL` if `self` can be used to initialize a `URL` instance, otherwise throws.
+    ///
+    /// - Returns: The `URL` initialized with `self`.
+    /// - Throws:  An `AFError.invalidURL` instance.
+    public func asURL() throws -> URL {
+        guard let url = URL(string: self) else { throw AFError.invalidURL(url: self) }
+
+        return url
+    }
+}
+
+extension URL: URLConvertible {
+    /// Returns `self`.
+    public func asURL() throws -> URL { self }
+}
+
+extension URLComponents: URLConvertible {
+    /// Returns a `URL` if the `self`'s `url` is not nil, otherwise throws.
+    ///
+    /// - Returns: The `URL` from the `url` property.
+    /// - Throws:  An `AFError.invalidURL` instance.
+    public func asURL() throws -> URL {
+        guard let url = url else { throw AFError.invalidURL(url: self) }
+
+        return url
+    }
+}
+
+// MARK: -
+
+/// Types adopting the `URLRequestConvertible` protocol can be used to safely construct `URLRequest`s.
+public protocol URLRequestConvertible {
+    /// Returns a `URLRequest` or throws if an `Error` was encountered.
+    ///
+    /// - Returns: A `URLRequest`.
+    /// - Throws:  Any error thrown while constructing the `URLRequest`.
+    func asURLRequest() throws -> URLRequest
+}
+
+extension URLRequestConvertible {
+    /// The `URLRequest` returned by discarding any `Error` encountered.
+    public var urlRequest: URLRequest? { try? asURLRequest() }
+}
+
+extension URLRequest: URLRequestConvertible {
+    /// Returns `self`.
+    public func asURLRequest() throws -> URLRequest { self }
+}
+
+// MARK: -
+
+extension URLRequest {
+    /// Creates an instance with the specified `url`, `method`, and `headers`.
+    ///
+    /// - Parameters:
+    ///   - url:     The `URLConvertible` value.
+    ///   - method:  The `HTTPMethod`.
+    ///   - headers: The `HTTPHeaders`, `nil` by default.
+    /// - Throws:    Any error thrown while converting the `URLConvertible` to a `URL`.
+    public init(url: URLConvertible, method: HTTPMethod, headers: HTTPHeaders? = nil) throws {
+        let url = try url.asURL()
+
+        self.init(url: url)
+
+        httpMethod = method.rawValue
+        allHTTPHeaderFields = headers?.dictionary
+    }
+}

Pods/Alamofire/Source/URLEncodedFormEncoder.swift

@@ -0,0 +1,976 @@
+//
+//  URLEncodedFormEncoder.swift
+//
+//  Copyright (c) 2019 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+/// An object that encodes instances into URL-encoded query strings.
+///
+/// There is no published specification for how to encode collection types. By default, the convention of appending
+/// `[]` to the key for array values (`foo[]=1&foo[]=2`), and appending the key surrounded by square brackets for
+/// nested dictionary values (`foo[bar]=baz`) is used. Optionally, `ArrayEncoding` can be used to omit the
+/// square brackets appended to array keys.
+///
+/// `BoolEncoding` can be used to configure how `Bool` values are encoded. The default behavior is to encode
+/// `true` as 1 and `false` as 0.
+///
+/// `DateEncoding` can be used to configure how `Date` values are encoded. By default, the `.deferredToDate`
+/// strategy is used, which formats dates from their structure.
+///
+/// `SpaceEncoding` can be used to configure how spaces are encoded. Modern encodings use percent replacement (`%20`),
+/// while older encodings may expect spaces to be replaced with `+`.
+///
+/// This type is largely based on Vapor's [`url-encoded-form`](https://github.com/vapor/url-encoded-form) project.
+public final class URLEncodedFormEncoder {
+    /// Encoding to use for `Array` values.
+    public enum ArrayEncoding {
+        /// An empty set of square brackets ("[]") are appended to the key for every value. This is the default encoding.
+        case brackets
+        /// No brackets are appended to the key and the key is encoded as is.
+        case noBrackets
+
+        /// Encodes the key according to the encoding.
+        ///
+        /// - Parameter key: The `key` to encode.
+        /// - Returns:       The encoded key.
+        func encode(_ key: String) -> String {
+            switch self {
+            case .brackets: return "\(key)[]"
+            case .noBrackets: return key
+            }
+        }
+    }
+
+    /// Encoding to use for `Bool` values.
+    public enum BoolEncoding {
+        /// Encodes `true` as `1`, `false` as `0`.
+        case numeric
+        /// Encodes `true` as "true", `false` as "false". This is the default encoding.
+        case literal
+
+        /// Encodes the given `Bool` as a `String`.
+        ///
+        /// - Parameter value: The `Bool` to encode.
+        ///
+        /// - Returns:         The encoded `String`.
+        func encode(_ value: Bool) -> String {
+            switch self {
+            case .numeric: return value ? "1" : "0"
+            case .literal: return value ? "true" : "false"
+            }
+        }
+    }
+
+    /// Encoding to use for `Data` values.
+    public enum DataEncoding {
+        /// Defers encoding to the `Data` type.
+        case deferredToData
+        /// Encodes `Data` as a Base64-encoded string. This is the default encoding.
+        case base64
+        /// Encode the `Data` as a custom value encoded by the given closure.
+        case custom((Data) throws -> String)
+
+        /// Encodes `Data` according to the encoding.
+        ///
+        /// - Parameter data: The `Data` to encode.
+        ///
+        /// - Returns:        The encoded `String`, or `nil` if the `Data` should be encoded according to its
+        ///                   `Encodable` implementation.
+        func encode(_ data: Data) throws -> String? {
+            switch self {
+            case .deferredToData: return nil
+            case .base64: return data.base64EncodedString()
+            case let .custom(encoding): return try encoding(data)
+            }
+        }
+    }
+
+    /// Encoding to use for `Date` values.
+    public enum DateEncoding {
+        /// ISO8601 and RFC3339 formatter.
+        private static let iso8601Formatter: ISO8601DateFormatter = {
+            let formatter = ISO8601DateFormatter()
+            formatter.formatOptions = .withInternetDateTime
+            return formatter
+        }()
+
+        /// Defers encoding to the `Date` type. This is the default encoding.
+        case deferredToDate
+        /// Encodes `Date`s as seconds since midnight UTC on January 1, 1970.
+        case secondsSince1970
+        /// Encodes `Date`s as milliseconds since midnight UTC on January 1, 1970.
+        case millisecondsSince1970
+        /// Encodes `Date`s according to the ISO8601 and RFC3339 standards.
+        case iso8601
+        /// Encodes `Date`s using the given `DateFormatter`.
+        case formatted(DateFormatter)
+        /// Encodes `Date`s using the given closure.
+        case custom((Date) throws -> String)
+
+        /// Encodes the date according to the encoding.
+        ///
+        /// - Parameter date: The `Date` to encode.
+        ///
+        /// - Returns:        The encoded `String`, or `nil` if the `Date` should be encoded according to its
+        ///                   `Encodable` implementation.
+        func encode(_ date: Date) throws -> String? {
+            switch self {
+            case .deferredToDate:
+                return nil
+            case .secondsSince1970:
+                return String(date.timeIntervalSince1970)
+            case .millisecondsSince1970:
+                return String(date.timeIntervalSince1970 * 1000.0)
+            case .iso8601:
+                return DateEncoding.iso8601Formatter.string(from: date)
+            case let .formatted(formatter):
+                return formatter.string(from: date)
+            case let .custom(closure):
+                return try closure(date)
+            }
+        }
+    }
+
+    /// Encoding to use for keys.
+    ///
+    /// This type is derived from [`JSONEncoder`'s `KeyEncodingStrategy`](https://github.com/apple/swift/blob/6aa313b8dd5f05135f7f878eccc1db6f9fbe34ff/stdlib/public/Darwin/Foundation/JSONEncoder.swift#L128)
+    /// and [`XMLEncoder`s `KeyEncodingStrategy`](https://github.com/MaxDesiatov/XMLCoder/blob/master/Sources/XMLCoder/Encoder/XMLEncoder.swift#L102).
+    public enum KeyEncoding {
+        /// Use the keys specified by each type. This is the default encoding.
+        case useDefaultKeys
+        /// Convert from "camelCaseKeys" to "snake_case_keys" before writing a key.
+        ///
+        /// Capital characters are determined by testing membership in
+        /// `CharacterSet.uppercaseLetters` and `CharacterSet.lowercaseLetters`
+        /// (Unicode General Categories Lu and Lt).
+        /// The conversion to lower case uses `Locale.system`, also known as
+        /// the ICU "root" locale. This means the result is consistent
+        /// regardless of the current user's locale and language preferences.
+        ///
+        /// Converting from camel case to snake case:
+        /// 1. Splits words at the boundary of lower-case to upper-case
+        /// 2. Inserts `_` between words
+        /// 3. Lowercases the entire string
+        /// 4. Preserves starting and ending `_`.
+        ///
+        /// For example, `oneTwoThree` becomes `one_two_three`. `_oneTwoThree_` becomes `_one_two_three_`.
+        ///
+        /// - Note: Using a key encoding strategy has a nominal performance cost, as each string key has to be converted.
+        case convertToSnakeCase
+        /// Same as convertToSnakeCase, but using `-` instead of `_`.
+        /// For example `oneTwoThree` becomes `one-two-three`.
+        case convertToKebabCase
+        /// Capitalize the first letter only.
+        /// For example `oneTwoThree` becomes  `OneTwoThree`.
+        case capitalized
+        /// Uppercase all letters.
+        /// For example `oneTwoThree` becomes  `ONETWOTHREE`.
+        case uppercased
+        /// Lowercase all letters.
+        /// For example `oneTwoThree` becomes  `onetwothree`.
+        case lowercased
+        /// A custom encoding using the provided closure.
+        case custom((String) -> String)
+
+        func encode(_ key: String) -> String {
+            switch self {
+            case .useDefaultKeys: return key
+            case .convertToSnakeCase: return convertToSnakeCase(key)
+            case .convertToKebabCase: return convertToKebabCase(key)
+            case .capitalized: return String(key.prefix(1).uppercased() + key.dropFirst())
+            case .uppercased: return key.uppercased()
+            case .lowercased: return key.lowercased()
+            case let .custom(encoding): return encoding(key)
+            }
+        }
+
+        private func convertToSnakeCase(_ key: String) -> String {
+            convert(key, usingSeparator: "_")
+        }
+
+        private func convertToKebabCase(_ key: String) -> String {
+            convert(key, usingSeparator: "-")
+        }
+
+        private func convert(_ key: String, usingSeparator separator: String) -> String {
+            guard !key.isEmpty else { return key }
+
+            var words: [Range<String.Index>] = []
+            // The general idea of this algorithm is to split words on
+            // transition from lower to upper case, then on transition of >1
+            // upper case characters to lowercase
+            //
+            // myProperty -> my_property
+            // myURLProperty -> my_url_property
+            //
+            // It is assumed, per Swift naming conventions, that the first character of the key is lowercase.
+            var wordStart = key.startIndex
+            var searchRange = key.index(after: wordStart)..<key.endIndex
+
+            // Find next uppercase character
+            while let upperCaseRange = key.rangeOfCharacter(from: CharacterSet.uppercaseLetters, options: [], range: searchRange) {
+                let untilUpperCase = wordStart..<upperCaseRange.lowerBound
+                words.append(untilUpperCase)
+
+                // Find next lowercase character
+                searchRange = upperCaseRange.lowerBound..<searchRange.upperBound
+                guard let lowerCaseRange = key.rangeOfCharacter(from: CharacterSet.lowercaseLetters, options: [], range: searchRange) else {
+                    // There are no more lower case letters. Just end here.
+                    wordStart = searchRange.lowerBound
+                    break
+                }
+
+                // Is the next lowercase letter more than 1 after the uppercase?
+                // If so, we encountered a group of uppercase letters that we
+                // should treat as its own word
+                let nextCharacterAfterCapital = key.index(after: upperCaseRange.lowerBound)
+                if lowerCaseRange.lowerBound == nextCharacterAfterCapital {
+                    // The next character after capital is a lower case character and therefore not a word boundary.
+                    // Continue searching for the next upper case for the boundary.
+                    wordStart = upperCaseRange.lowerBound
+                } else {
+                    // There was a range of >1 capital letters. Turn those into a word, stopping at the capital before the lower case character.
+                    let beforeLowerIndex = key.index(before: lowerCaseRange.lowerBound)
+                    words.append(upperCaseRange.lowerBound..<beforeLowerIndex)
+
+                    // Next word starts at the capital before the lowercase we just found
+                    wordStart = beforeLowerIndex
+                }
+                searchRange = lowerCaseRange.upperBound..<searchRange.upperBound
+            }
+            words.append(wordStart..<searchRange.upperBound)
+            let result = words.map { range in
+                key[range].lowercased()
+            }.joined(separator: separator)
+
+            return result
+        }
+    }
+
+    /// Encoding to use for spaces.
+    public enum SpaceEncoding {
+        /// Encodes spaces according to normal percent escaping rules (%20).
+        case percentEscaped
+        /// Encodes spaces as `+`,
+        case plusReplaced
+
+        /// Encodes the string according to the encoding.
+        ///
+        /// - Parameter string: The `String` to encode.
+        ///
+        /// - Returns:          The encoded `String`.
+        func encode(_ string: String) -> String {
+            switch self {
+            case .percentEscaped: return string.replacingOccurrences(of: " ", with: "%20")
+            case .plusReplaced: return string.replacingOccurrences(of: " ", with: "+")
+            }
+        }
+    }
+
+    /// `URLEncodedFormEncoder` error.
+    public enum Error: Swift.Error {
+        /// An invalid root object was created by the encoder. Only keyed values are valid.
+        case invalidRootObject(String)
+
+        var localizedDescription: String {
+            switch self {
+            case let .invalidRootObject(object):
+                return "URLEncodedFormEncoder requires keyed root object. Received \(object) instead."
+            }
+        }
+    }
+
+    /// Whether or not to sort the encoded key value pairs.
+    ///
+    /// - Note: This setting ensures a consistent ordering for all encodings of the same parameters. When set to `false`,
+    ///         encoded `Dictionary` values may have a different encoded order each time they're encoded due to
+    ///       ` Dictionary`'s random storage order, but `Encodable` types will maintain their encoded order.
+    public let alphabetizeKeyValuePairs: Bool
+    /// The `ArrayEncoding` to use.
+    public let arrayEncoding: ArrayEncoding
+    /// The `BoolEncoding` to use.
+    public let boolEncoding: BoolEncoding
+    /// THe `DataEncoding` to use.
+    public let dataEncoding: DataEncoding
+    /// The `DateEncoding` to use.
+    public let dateEncoding: DateEncoding
+    /// The `KeyEncoding` to use.
+    public let keyEncoding: KeyEncoding
+    /// The `SpaceEncoding` to use.
+    public let spaceEncoding: SpaceEncoding
+    /// The `CharacterSet` of allowed (non-escaped) characters.
+    public var allowedCharacters: CharacterSet
+
+    /// Creates an instance from the supplied parameters.
+    ///
+    /// - Parameters:
+    ///   - alphabetizeKeyValuePairs: Whether or not to sort the encoded key value pairs. `true` by default.
+    ///   - arrayEncoding:            The `ArrayEncoding` to use. `.brackets` by default.
+    ///   - boolEncoding:             The `BoolEncoding` to use. `.numeric` by default.
+    ///   - dataEncoding:             The `DataEncoding` to use. `.base64` by default.
+    ///   - dateEncoding:             The `DateEncoding` to use. `.deferredToDate` by default.
+    ///   - keyEncoding:              The `KeyEncoding` to use. `.useDefaultKeys` by default.
+    ///   - spaceEncoding:            The `SpaceEncoding` to use. `.percentEscaped` by default.
+    ///   - allowedCharacters:        The `CharacterSet` of allowed (non-escaped) characters. `.afURLQueryAllowed` by
+    ///                               default.
+    public init(alphabetizeKeyValuePairs: Bool = true,
+                arrayEncoding: ArrayEncoding = .brackets,
+                boolEncoding: BoolEncoding = .numeric,
+                dataEncoding: DataEncoding = .base64,
+                dateEncoding: DateEncoding = .deferredToDate,
+                keyEncoding: KeyEncoding = .useDefaultKeys,
+                spaceEncoding: SpaceEncoding = .percentEscaped,
+                allowedCharacters: CharacterSet = .afURLQueryAllowed) {
+        self.alphabetizeKeyValuePairs = alphabetizeKeyValuePairs
+        self.arrayEncoding = arrayEncoding
+        self.boolEncoding = boolEncoding
+        self.dataEncoding = dataEncoding
+        self.dateEncoding = dateEncoding
+        self.keyEncoding = keyEncoding
+        self.spaceEncoding = spaceEncoding
+        self.allowedCharacters = allowedCharacters
+    }
+
+    func encode(_ value: Encodable) throws -> URLEncodedFormComponent {
+        let context = URLEncodedFormContext(.object([]))
+        let encoder = _URLEncodedFormEncoder(context: context,
+                                             boolEncoding: boolEncoding,
+                                             dataEncoding: dataEncoding,
+                                             dateEncoding: dateEncoding)
+        try value.encode(to: encoder)
+
+        return context.component
+    }
+
+    /// Encodes the `value` as a URL form encoded `String`.
+    ///
+    /// - Parameter value: The `Encodable` value.`
+    ///
+    /// - Returns:         The encoded `String`.
+    /// - Throws:          An `Error` or `EncodingError` instance if encoding fails.
+    public func encode(_ value: Encodable) throws -> String {
+        let component: URLEncodedFormComponent = try encode(value)
+
+        guard case let .object(object) = component else {
+            throw Error.invalidRootObject("\(component)")
+        }
+
+        let serializer = URLEncodedFormSerializer(alphabetizeKeyValuePairs: alphabetizeKeyValuePairs,
+                                                  arrayEncoding: arrayEncoding,
+                                                  keyEncoding: keyEncoding,
+                                                  spaceEncoding: spaceEncoding,
+                                                  allowedCharacters: allowedCharacters)
+        let query = serializer.serialize(object)
+
+        return query
+    }
+
+    /// Encodes the value as `Data`. This is performed by first creating an encoded `String` and then returning the
+    /// `.utf8` data.
+    ///
+    /// - Parameter value: The `Encodable` value.
+    ///
+    /// - Returns:         The encoded `Data`.
+    ///
+    /// - Throws:          An `Error` or `EncodingError` instance if encoding fails.
+    public func encode(_ value: Encodable) throws -> Data {
+        let string: String = try encode(value)
+
+        return Data(string.utf8)
+    }
+}
+
+final class _URLEncodedFormEncoder {
+    var codingPath: [CodingKey]
+    // Returns an empty dictionary, as this encoder doesn't support userInfo.
+    var userInfo: [CodingUserInfoKey: Any] { [:] }
+
+    let context: URLEncodedFormContext
+
+    private let boolEncoding: URLEncodedFormEncoder.BoolEncoding
+    private let dataEncoding: URLEncodedFormEncoder.DataEncoding
+    private let dateEncoding: URLEncodedFormEncoder.DateEncoding
+
+    init(context: URLEncodedFormContext,
+         codingPath: [CodingKey] = [],
+         boolEncoding: URLEncodedFormEncoder.BoolEncoding,
+         dataEncoding: URLEncodedFormEncoder.DataEncoding,
+         dateEncoding: URLEncodedFormEncoder.DateEncoding) {
+        self.context = context
+        self.codingPath = codingPath
+        self.boolEncoding = boolEncoding
+        self.dataEncoding = dataEncoding
+        self.dateEncoding = dateEncoding
+    }
+}
+
+extension _URLEncodedFormEncoder: Encoder {
+    func container<Key>(keyedBy type: Key.Type) -> KeyedEncodingContainer<Key> where Key: CodingKey {
+        let container = _URLEncodedFormEncoder.KeyedContainer<Key>(context: context,
+                                                                   codingPath: codingPath,
+                                                                   boolEncoding: boolEncoding,
+                                                                   dataEncoding: dataEncoding,
+                                                                   dateEncoding: dateEncoding)
+        return KeyedEncodingContainer(container)
+    }
+
+    func unkeyedContainer() -> UnkeyedEncodingContainer {
+        _URLEncodedFormEncoder.UnkeyedContainer(context: context,
+                                                codingPath: codingPath,
+                                                boolEncoding: boolEncoding,
+                                                dataEncoding: dataEncoding,
+                                                dateEncoding: dateEncoding)
+    }
+
+    func singleValueContainer() -> SingleValueEncodingContainer {
+        _URLEncodedFormEncoder.SingleValueContainer(context: context,
+                                                    codingPath: codingPath,
+                                                    boolEncoding: boolEncoding,
+                                                    dataEncoding: dataEncoding,
+                                                    dateEncoding: dateEncoding)
+    }
+}
+
+final class URLEncodedFormContext {
+    var component: URLEncodedFormComponent
+
+    init(_ component: URLEncodedFormComponent) {
+        self.component = component
+    }
+}
+
+enum URLEncodedFormComponent {
+    typealias Object = [(key: String, value: URLEncodedFormComponent)]
+
+    case string(String)
+    case array([URLEncodedFormComponent])
+    case object(Object)
+
+    /// Converts self to an `[URLEncodedFormData]` or returns `nil` if not convertible.
+    var array: [URLEncodedFormComponent]? {
+        switch self {
+        case let .array(array): return array
+        default: return nil
+        }
+    }
+
+    /// Converts self to an `Object` or returns `nil` if not convertible.
+    var object: Object? {
+        switch self {
+        case let .object(object): return object
+        default: return nil
+        }
+    }
+
+    /// Sets self to the supplied value at a given path.
+    ///
+    ///     data.set(to: "hello", at: ["path", "to", "value"])
+    ///
+    /// - parameters:
+    ///     - value: Value of `Self` to set at the supplied path.
+    ///     - path: `CodingKey` path to update with the supplied value.
+    public mutating func set(to value: URLEncodedFormComponent, at path: [CodingKey]) {
+        set(&self, to: value, at: path)
+    }
+
+    /// Recursive backing method to `set(to:at:)`.
+    private func set(_ context: inout URLEncodedFormComponent, to value: URLEncodedFormComponent, at path: [CodingKey]) {
+        guard path.count >= 1 else {
+            context = value
+            return
+        }
+
+        let end = path[0]
+        var child: URLEncodedFormComponent
+        switch path.count {
+        case 1:
+            child = value
+        case 2...:
+            if let index = end.intValue {
+                let array = context.array ?? []
+                if array.count > index {
+                    child = array[index]
+                } else {
+                    child = .array([])
+                }
+                set(&child, to: value, at: Array(path[1...]))
+            } else {
+                child = context.object?.first { $0.key == end.stringValue }?.value ?? .object(.init())
+                set(&child, to: value, at: Array(path[1...]))
+            }
+        default: fatalError("Unreachable")
+        }
+
+        if let index = end.intValue {
+            if var array = context.array {
+                if array.count > index {
+                    array[index] = child
+                } else {
+                    array.append(child)
+                }
+                context = .array(array)
+            } else {
+                context = .array([child])
+            }
+        } else {
+            if var object = context.object {
+                if let index = object.firstIndex(where: { $0.key == end.stringValue }) {
+                    object[index] = (key: end.stringValue, value: child)
+                } else {
+                    object.append((key: end.stringValue, value: child))
+                }
+                context = .object(object)
+            } else {
+                context = .object([(key: end.stringValue, value: child)])
+            }
+        }
+    }
+}
+
+struct AnyCodingKey: CodingKey, Hashable {
+    let stringValue: String
+    let intValue: Int?
+
+    init?(stringValue: String) {
+        self.stringValue = stringValue
+        intValue = nil
+    }
+
+    init?(intValue: Int) {
+        stringValue = "\(intValue)"
+        self.intValue = intValue
+    }
+
+    init<Key>(_ base: Key) where Key: CodingKey {
+        if let intValue = base.intValue {
+            self.init(intValue: intValue)!
+        } else {
+            self.init(stringValue: base.stringValue)!
+        }
+    }
+}
+
+extension _URLEncodedFormEncoder {
+    final class KeyedContainer<Key> where Key: CodingKey {
+        var codingPath: [CodingKey]
+
+        private let context: URLEncodedFormContext
+        private let boolEncoding: URLEncodedFormEncoder.BoolEncoding
+        private let dataEncoding: URLEncodedFormEncoder.DataEncoding
+        private let dateEncoding: URLEncodedFormEncoder.DateEncoding
+
+        init(context: URLEncodedFormContext,
+             codingPath: [CodingKey],
+             boolEncoding: URLEncodedFormEncoder.BoolEncoding,
+             dataEncoding: URLEncodedFormEncoder.DataEncoding,
+             dateEncoding: URLEncodedFormEncoder.DateEncoding) {
+            self.context = context
+            self.codingPath = codingPath
+            self.boolEncoding = boolEncoding
+            self.dataEncoding = dataEncoding
+            self.dateEncoding = dateEncoding
+        }
+
+        private func nestedCodingPath(for key: CodingKey) -> [CodingKey] {
+            codingPath + [key]
+        }
+    }
+}
+
+extension _URLEncodedFormEncoder.KeyedContainer: KeyedEncodingContainerProtocol {
+    func encodeNil(forKey key: Key) throws {
+        let context = EncodingError.Context(codingPath: codingPath,
+                                            debugDescription: "URLEncodedFormEncoder cannot encode nil values.")
+        throw EncodingError.invalidValue("\(key): nil", context)
+    }
+
+    func encode<T>(_ value: T, forKey key: Key) throws where T: Encodable {
+        var container = nestedSingleValueEncoder(for: key)
+        try container.encode(value)
+    }
+
+    func nestedSingleValueEncoder(for key: Key) -> SingleValueEncodingContainer {
+        let container = _URLEncodedFormEncoder.SingleValueContainer(context: context,
+                                                                    codingPath: nestedCodingPath(for: key),
+                                                                    boolEncoding: boolEncoding,
+                                                                    dataEncoding: dataEncoding,
+                                                                    dateEncoding: dateEncoding)
+
+        return container
+    }
+
+    func nestedUnkeyedContainer(forKey key: Key) -> UnkeyedEncodingContainer {
+        let container = _URLEncodedFormEncoder.UnkeyedContainer(context: context,
+                                                                codingPath: nestedCodingPath(for: key),
+                                                                boolEncoding: boolEncoding,
+                                                                dataEncoding: dataEncoding,
+                                                                dateEncoding: dateEncoding)
+
+        return container
+    }
+
+    func nestedContainer<NestedKey>(keyedBy keyType: NestedKey.Type, forKey key: Key) -> KeyedEncodingContainer<NestedKey> where NestedKey: CodingKey {
+        let container = _URLEncodedFormEncoder.KeyedContainer<NestedKey>(context: context,
+                                                                         codingPath: nestedCodingPath(for: key),
+                                                                         boolEncoding: boolEncoding,
+                                                                         dataEncoding: dataEncoding,
+                                                                         dateEncoding: dateEncoding)
+
+        return KeyedEncodingContainer(container)
+    }
+
+    func superEncoder() -> Encoder {
+        _URLEncodedFormEncoder(context: context,
+                               codingPath: codingPath,
+                               boolEncoding: boolEncoding,
+                               dataEncoding: dataEncoding,
+                               dateEncoding: dateEncoding)
+    }
+
+    func superEncoder(forKey key: Key) -> Encoder {
+        _URLEncodedFormEncoder(context: context,
+                               codingPath: nestedCodingPath(for: key),
+                               boolEncoding: boolEncoding,
+                               dataEncoding: dataEncoding,
+                               dateEncoding: dateEncoding)
+    }
+}
+
+extension _URLEncodedFormEncoder {
+    final class SingleValueContainer {
+        var codingPath: [CodingKey]
+
+        private var canEncodeNewValue = true
+
+        private let context: URLEncodedFormContext
+        private let boolEncoding: URLEncodedFormEncoder.BoolEncoding
+        private let dataEncoding: URLEncodedFormEncoder.DataEncoding
+        private let dateEncoding: URLEncodedFormEncoder.DateEncoding
+
+        init(context: URLEncodedFormContext,
+             codingPath: [CodingKey],
+             boolEncoding: URLEncodedFormEncoder.BoolEncoding,
+             dataEncoding: URLEncodedFormEncoder.DataEncoding,
+             dateEncoding: URLEncodedFormEncoder.DateEncoding) {
+            self.context = context
+            self.codingPath = codingPath
+            self.boolEncoding = boolEncoding
+            self.dataEncoding = dataEncoding
+            self.dateEncoding = dateEncoding
+        }
+
+        private func checkCanEncode(value: Any?) throws {
+            guard canEncodeNewValue else {
+                let context = EncodingError.Context(codingPath: codingPath,
+                                                    debugDescription: "Attempt to encode value through single value container when previously value already encoded.")
+                throw EncodingError.invalidValue(value as Any, context)
+            }
+        }
+    }
+}
+
+extension _URLEncodedFormEncoder.SingleValueContainer: SingleValueEncodingContainer {
+    func encodeNil() throws {
+        try checkCanEncode(value: nil)
+        defer { canEncodeNewValue = false }
+
+        let context = EncodingError.Context(codingPath: codingPath,
+                                            debugDescription: "URLEncodedFormEncoder cannot encode nil values.")
+        throw EncodingError.invalidValue("nil", context)
+    }
+
+    func encode(_ value: Bool) throws {
+        try encode(value, as: String(boolEncoding.encode(value)))
+    }
+
+    func encode(_ value: String) throws {
+        try encode(value, as: value)
+    }
+
+    func encode(_ value: Double) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: Float) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: Int) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: Int8) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: Int16) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: Int32) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: Int64) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: UInt) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: UInt8) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: UInt16) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: UInt32) throws {
+        try encode(value, as: String(value))
+    }
+
+    func encode(_ value: UInt64) throws {
+        try encode(value, as: String(value))
+    }
+
+    private func encode<T>(_ value: T, as string: String) throws where T: Encodable {
+        try checkCanEncode(value: value)
+        defer { canEncodeNewValue = false }
+
+        context.component.set(to: .string(string), at: codingPath)
+    }
+
+    func encode<T>(_ value: T) throws where T: Encodable {
+        switch value {
+        case let date as Date:
+            guard let string = try dateEncoding.encode(date) else {
+                try attemptToEncode(value)
+                return
+            }
+
+            try encode(value, as: string)
+        case let data as Data:
+            guard let string = try dataEncoding.encode(data) else {
+                try attemptToEncode(value)
+                return
+            }
+
+            try encode(value, as: string)
+        case let decimal as Decimal:
+            // Decimal's `Encodable` implementation returns an object, not a single value, so override it.
+            try encode(value, as: String(describing: decimal))
+        default:
+            try attemptToEncode(value)
+        }
+    }
+
+    private func attemptToEncode<T>(_ value: T) throws where T: Encodable {
+        try checkCanEncode(value: value)
+        defer { canEncodeNewValue = false }
+
+        let encoder = _URLEncodedFormEncoder(context: context,
+                                             codingPath: codingPath,
+                                             boolEncoding: boolEncoding,
+                                             dataEncoding: dataEncoding,
+                                             dateEncoding: dateEncoding)
+        try value.encode(to: encoder)
+    }
+}
+
+extension _URLEncodedFormEncoder {
+    final class UnkeyedContainer {
+        var codingPath: [CodingKey]
+
+        var count = 0
+        var nestedCodingPath: [CodingKey] {
+            codingPath + [AnyCodingKey(intValue: count)!]
+        }
+
+        private let context: URLEncodedFormContext
+        private let boolEncoding: URLEncodedFormEncoder.BoolEncoding
+        private let dataEncoding: URLEncodedFormEncoder.DataEncoding
+        private let dateEncoding: URLEncodedFormEncoder.DateEncoding
+
+        init(context: URLEncodedFormContext,
+             codingPath: [CodingKey],
+             boolEncoding: URLEncodedFormEncoder.BoolEncoding,
+             dataEncoding: URLEncodedFormEncoder.DataEncoding,
+             dateEncoding: URLEncodedFormEncoder.DateEncoding) {
+            self.context = context
+            self.codingPath = codingPath
+            self.boolEncoding = boolEncoding
+            self.dataEncoding = dataEncoding
+            self.dateEncoding = dateEncoding
+        }
+    }
+}
+
+extension _URLEncodedFormEncoder.UnkeyedContainer: UnkeyedEncodingContainer {
+    func encodeNil() throws {
+        let context = EncodingError.Context(codingPath: codingPath,
+                                            debugDescription: "URLEncodedFormEncoder cannot encode nil values.")
+        throw EncodingError.invalidValue("nil", context)
+    }
+
+    func encode<T>(_ value: T) throws where T: Encodable {
+        var container = nestedSingleValueContainer()
+        try container.encode(value)
+    }
+
+    func nestedSingleValueContainer() -> SingleValueEncodingContainer {
+        defer { count += 1 }
+
+        return _URLEncodedFormEncoder.SingleValueContainer(context: context,
+                                                           codingPath: nestedCodingPath,
+                                                           boolEncoding: boolEncoding,
+                                                           dataEncoding: dataEncoding,
+                                                           dateEncoding: dateEncoding)
+    }
+
+    func nestedContainer<NestedKey>(keyedBy keyType: NestedKey.Type) -> KeyedEncodingContainer<NestedKey> where NestedKey: CodingKey {
+        defer { count += 1 }
+        let container = _URLEncodedFormEncoder.KeyedContainer<NestedKey>(context: context,
+                                                                         codingPath: nestedCodingPath,
+                                                                         boolEncoding: boolEncoding,
+                                                                         dataEncoding: dataEncoding,
+                                                                         dateEncoding: dateEncoding)
+
+        return KeyedEncodingContainer(container)
+    }
+
+    func nestedUnkeyedContainer() -> UnkeyedEncodingContainer {
+        defer { count += 1 }
+
+        return _URLEncodedFormEncoder.UnkeyedContainer(context: context,
+                                                       codingPath: nestedCodingPath,
+                                                       boolEncoding: boolEncoding,
+                                                       dataEncoding: dataEncoding,
+                                                       dateEncoding: dateEncoding)
+    }
+
+    func superEncoder() -> Encoder {
+        defer { count += 1 }
+
+        return _URLEncodedFormEncoder(context: context,
+                                      codingPath: codingPath,
+                                      boolEncoding: boolEncoding,
+                                      dataEncoding: dataEncoding,
+                                      dateEncoding: dateEncoding)
+    }
+}
+
+final class URLEncodedFormSerializer {
+    private let alphabetizeKeyValuePairs: Bool
+    private let arrayEncoding: URLEncodedFormEncoder.ArrayEncoding
+    private let keyEncoding: URLEncodedFormEncoder.KeyEncoding
+    private let spaceEncoding: URLEncodedFormEncoder.SpaceEncoding
+    private let allowedCharacters: CharacterSet
+
+    init(alphabetizeKeyValuePairs: Bool,
+         arrayEncoding: URLEncodedFormEncoder.ArrayEncoding,
+         keyEncoding: URLEncodedFormEncoder.KeyEncoding,
+         spaceEncoding: URLEncodedFormEncoder.SpaceEncoding,
+         allowedCharacters: CharacterSet) {
+        self.alphabetizeKeyValuePairs = alphabetizeKeyValuePairs
+        self.arrayEncoding = arrayEncoding
+        self.keyEncoding = keyEncoding
+        self.spaceEncoding = spaceEncoding
+        self.allowedCharacters = allowedCharacters
+    }
+
+    func serialize(_ object: URLEncodedFormComponent.Object) -> String {
+        var output: [String] = []
+        for (key, component) in object {
+            let value = serialize(component, forKey: key)
+            output.append(value)
+        }
+        output = alphabetizeKeyValuePairs ? output.sorted() : output
+
+        return output.joinedWithAmpersands()
+    }
+
+    func serialize(_ component: URLEncodedFormComponent, forKey key: String) -> String {
+        switch component {
+        case let .string(string): return "\(escape(keyEncoding.encode(key)))=\(escape(string))"
+        case let .array(array): return serialize(array, forKey: key)
+        case let .object(object): return serialize(object, forKey: key)
+        }
+    }
+
+    func serialize(_ object: URLEncodedFormComponent.Object, forKey key: String) -> String {
+        var segments: [String] = object.map { subKey, value in
+            let keyPath = "[\(subKey)]"
+            return serialize(value, forKey: key + keyPath)
+        }
+        segments = alphabetizeKeyValuePairs ? segments.sorted() : segments
+
+        return segments.joinedWithAmpersands()
+    }
+
+    func serialize(_ array: [URLEncodedFormComponent], forKey key: String) -> String {
+        var segments: [String] = array.map { component in
+            let keyPath = arrayEncoding.encode(key)
+            return serialize(component, forKey: keyPath)
+        }
+        segments = alphabetizeKeyValuePairs ? segments.sorted() : segments
+
+        return segments.joinedWithAmpersands()
+    }
+
+    func escape(_ query: String) -> String {
+        var allowedCharactersWithSpace = allowedCharacters
+        allowedCharactersWithSpace.insert(charactersIn: " ")
+        let escapedQuery = query.addingPercentEncoding(withAllowedCharacters: allowedCharactersWithSpace) ?? query
+        let spaceEncodedQuery = spaceEncoding.encode(escapedQuery)
+
+        return spaceEncodedQuery
+    }
+}
+
+extension Array where Element == String {
+    func joinedWithAmpersands() -> String {
+        joined(separator: "&")
+    }
+}
+
+extension CharacterSet {
+    /// Creates a CharacterSet from RFC 3986 allowed characters.
+    ///
+    /// RFC 3986 states that the following characters are "reserved" characters.
+    ///
+    /// - General Delimiters: ":", "#", "[", "]", "@", "?", "/"
+    /// - Sub-Delimiters: "!", "$", "&", "'", "(", ")", "*", "+", ",", ";", "="
+    ///
+    /// In RFC 3986 - Section 3.4, it states that the "?" and "/" characters should not be escaped to allow
+    /// query strings to include a URL. Therefore, all "reserved" characters with the exception of "?" and "/"
+    /// should be percent-escaped in the query string.
+    public static let afURLQueryAllowed: CharacterSet = {
+        let generalDelimitersToEncode = ":#[]@" // does not include "?" or "/" due to RFC 3986 - Section 3.4
+        let subDelimitersToEncode = "!$&'()*+,;="
+        let encodableDelimiters = CharacterSet(charactersIn: "\(generalDelimitersToEncode)\(subDelimitersToEncode)")
+
+        return CharacterSet.urlQueryAllowed.subtracting(encodableDelimiters)
+    }()
+}

Pods/Alamofire/Source/URLRequest+Alamofire.swift

@@ -0,0 +1,39 @@
+//
+//  URLRequest+Alamofire.swift
+//
+//  Copyright (c) 2019 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension URLRequest {
+    /// Returns the `httpMethod` as Alamofire's `HTTPMethod` type.
+    public var method: HTTPMethod? {
+        get { httpMethod.flatMap(HTTPMethod.init) }
+        set { httpMethod = newValue?.rawValue }
+    }
+
+    public func validate() throws {
+        if method == .get, let bodyData = httpBody {
+            throw AFError.urlRequestValidationFailed(reason: .bodyDataInGETRequest(bodyData))
+        }
+    }
+}

Pods/Alamofire/Source/URLSessionConfiguration+Alamofire.swift

@@ -0,0 +1,37 @@
+//
+//  URLSessionConfiguration+Alamofire.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension URLSessionConfiguration: AlamofireExtended {}
+extension AlamofireExtension where ExtendedType: URLSessionConfiguration {
+    /// Alamofire's default configuration. Same as `URLSessionConfiguration.default` but adds Alamofire default
+    /// `Accept-Language`, `Accept-Encoding`, and `User-Agent` headers.
+    public static var `default`: URLSessionConfiguration {
+        let configuration = URLSessionConfiguration.default
+        configuration.headers = .default
+
+        return configuration
+    }
+}

Pods/Alamofire/Source/Validation.swift

@@ -0,0 +1,302 @@
+//
+//  Validation.swift
+//
+//  Copyright (c) 2014-2018 Alamofire Software Foundation (http://alamofire.org/)
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import Foundation
+
+extension Request {
+    // MARK: Helper Types
+
+    fileprivate typealias ErrorReason = AFError.ResponseValidationFailureReason
+
+    /// Used to represent whether a validation succeeded or failed.
+    public typealias ValidationResult = Result<Void, Error>
+
+    fileprivate struct MIMEType {
+        let type: String
+        let subtype: String
+
+        var isWildcard: Bool { type == "*" && subtype == "*" }
+
+        init?(_ string: String) {
+            let components: [String] = {
+                let stripped = string.trimmingCharacters(in: .whitespacesAndNewlines)
+                let split = stripped[..<(stripped.range(of: ";")?.lowerBound ?? stripped.endIndex)]
+
+                return split.components(separatedBy: "/")
+            }()
+
+            if let type = components.first, let subtype = components.last {
+                self.type = type
+                self.subtype = subtype
+            } else {
+                return nil
+            }
+        }
+
+        func matches(_ mime: MIMEType) -> Bool {
+            switch (type, subtype) {
+            case (mime.type, mime.subtype), (mime.type, "*"), ("*", mime.subtype), ("*", "*"):
+                return true
+            default:
+                return false
+            }
+        }
+    }
+
+    // MARK: Properties
+
+    fileprivate var acceptableStatusCodes: Range<Int> { 200..<300 }
+
+    fileprivate var acceptableContentTypes: [String] {
+        if let accept = request?.value(forHTTPHeaderField: "Accept") {
+            return accept.components(separatedBy: ",")
+        }
+
+        return ["*/*"]
+    }
+
+    // MARK: Status Code
+
+    fileprivate func validate<S: Sequence>(statusCode acceptableStatusCodes: S,
+                                           response: HTTPURLResponse)
+        -> ValidationResult
+        where S.Iterator.Element == Int {
+        if acceptableStatusCodes.contains(response.statusCode) {
+            return .success(())
+        } else {
+            let reason: ErrorReason = .unacceptableStatusCode(code: response.statusCode)
+            return .failure(AFError.responseValidationFailed(reason: reason))
+        }
+    }
+
+    // MARK: Content Type
+
+    fileprivate func validate<S: Sequence>(contentType acceptableContentTypes: S,
+                                           response: HTTPURLResponse,
+                                           data: Data?)
+        -> ValidationResult
+        where S.Iterator.Element == String {
+        guard let data = data, !data.isEmpty else { return .success(()) }
+
+        return validate(contentType: acceptableContentTypes, response: response)
+    }
+
+    fileprivate func validate<S: Sequence>(contentType acceptableContentTypes: S,
+                                           response: HTTPURLResponse)
+        -> ValidationResult
+        where S.Iterator.Element == String {
+        guard
+            let responseContentType = response.mimeType,
+            let responseMIMEType = MIMEType(responseContentType)
+        else {
+            for contentType in acceptableContentTypes {
+                if let mimeType = MIMEType(contentType), mimeType.isWildcard {
+                    return .success(())
+                }
+            }
+
+            let error: AFError = {
+                let reason: ErrorReason = .missingContentType(acceptableContentTypes: Array(acceptableContentTypes))
+                return AFError.responseValidationFailed(reason: reason)
+            }()
+
+            return .failure(error)
+        }
+
+        for contentType in acceptableContentTypes {
+            if let acceptableMIMEType = MIMEType(contentType), acceptableMIMEType.matches(responseMIMEType) {
+                return .success(())
+            }
+        }
+
+        let error: AFError = {
+            let reason: ErrorReason = .unacceptableContentType(acceptableContentTypes: Array(acceptableContentTypes),
+                                                               responseContentType: responseContentType)
+
+            return AFError.responseValidationFailed(reason: reason)
+        }()
+
+        return .failure(error)
+    }
+}
+
+// MARK: -
+
+extension DataRequest {
+    /// A closure used to validate a request that takes a URL request, a URL response and data, and returns whether the
+    /// request was valid.
+    public typealias Validation = (URLRequest?, HTTPURLResponse, Data?) -> ValidationResult
+
+    /// Validates that the response has a status code in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - Parameter statusCode: `Sequence` of acceptable response status codes.
+    ///
+    /// - Returns:              The instance.
+    @discardableResult
+    public func validate<S: Sequence>(statusCode acceptableStatusCodes: S) -> Self where S.Iterator.Element == Int {
+        validate { [unowned self] _, response, _ in
+            self.validate(statusCode: acceptableStatusCodes, response: response)
+        }
+    }
+
+    /// Validates that the response has a content type in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter contentType: The acceptable content types, which may specify wildcard types and/or subtypes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(contentType acceptableContentTypes: @escaping @autoclosure () -> S) -> Self where S.Iterator.Element == String {
+        validate { [unowned self] _, response, data in
+            self.validate(contentType: acceptableContentTypes(), response: response, data: data)
+        }
+    }
+
+    /// Validates that the response has a status code in the default acceptable range of 200...299, and that the content
+    /// type matches any specified in the Accept HTTP header field.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate() -> Self {
+        let contentTypes: () -> [String] = { [unowned self] in
+            self.acceptableContentTypes
+        }
+        return validate(statusCode: acceptableStatusCodes).validate(contentType: contentTypes())
+    }
+}
+
+extension DataStreamRequest {
+    /// A closure used to validate a request that takes a `URLRequest` and `HTTPURLResponse` and returns whether the
+    /// request was valid.
+    public typealias Validation = (_ request: URLRequest?, _ response: HTTPURLResponse) -> ValidationResult
+
+    /// Validates that the response has a status code in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - Parameter statusCode: `Sequence` of acceptable response status codes.
+    ///
+    /// - Returns:              The instance.
+    @discardableResult
+    public func validate<S: Sequence>(statusCode acceptableStatusCodes: S) -> Self where S.Iterator.Element == Int {
+        validate { [unowned self] _, response in
+            self.validate(statusCode: acceptableStatusCodes, response: response)
+        }
+    }
+
+    /// Validates that the response has a content type in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter contentType: The acceptable content types, which may specify wildcard types and/or subtypes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(contentType acceptableContentTypes: @escaping @autoclosure () -> S) -> Self where S.Iterator.Element == String {
+        validate { [unowned self] _, response in
+            self.validate(contentType: acceptableContentTypes(), response: response)
+        }
+    }
+
+    /// Validates that the response has a status code in the default acceptable range of 200...299, and that the content
+    /// type matches any specified in the Accept HTTP header field.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - Returns: The instance.
+    @discardableResult
+    public func validate() -> Self {
+        let contentTypes: () -> [String] = { [unowned self] in
+            self.acceptableContentTypes
+        }
+        return validate(statusCode: acceptableStatusCodes).validate(contentType: contentTypes())
+    }
+}
+
+// MARK: -
+
+extension DownloadRequest {
+    /// A closure used to validate a request that takes a URL request, a URL response, a temporary URL and a
+    /// destination URL, and returns whether the request was valid.
+    public typealias Validation = (_ request: URLRequest?,
+                                   _ response: HTTPURLResponse,
+                                   _ fileURL: URL?)
+        -> ValidationResult
+
+    /// Validates that the response has a status code in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - Parameter statusCode: `Sequence` of acceptable response status codes.
+    ///
+    /// - Returns:              The instance.
+    @discardableResult
+    public func validate<S: Sequence>(statusCode acceptableStatusCodes: S) -> Self where S.Iterator.Element == Int {
+        validate { [unowned self] _, response, _ in
+            self.validate(statusCode: acceptableStatusCodes, response: response)
+        }
+    }
+
+    /// Validates that the response has a content type in the specified sequence.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - parameter contentType: The acceptable content types, which may specify wildcard types and/or subtypes.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate<S: Sequence>(contentType acceptableContentTypes: @escaping @autoclosure () -> S) -> Self where S.Iterator.Element == String {
+        validate { [unowned self] _, response, fileURL in
+            guard let validFileURL = fileURL else {
+                return .failure(AFError.responseValidationFailed(reason: .dataFileNil))
+            }
+
+            do {
+                let data = try Data(contentsOf: validFileURL)
+                return self.validate(contentType: acceptableContentTypes(), response: response, data: data)
+            } catch {
+                return .failure(AFError.responseValidationFailed(reason: .dataFileReadFailed(at: validFileURL)))
+            }
+        }
+    }
+
+    /// Validates that the response has a status code in the default acceptable range of 200...299, and that the content
+    /// type matches any specified in the Accept HTTP header field.
+    ///
+    /// If validation fails, subsequent calls to response handlers will have an associated error.
+    ///
+    /// - returns: The request.
+    @discardableResult
+    public func validate() -> Self {
+        let contentTypes = { [unowned self] in
+            self.acceptableContentTypes
+        }
+        return validate(statusCode: acceptableStatusCodes).validate(contentType: contentTypes())
+    }
+}

Pods/HandyJSON/LICENSE

@@ -0,0 +1,48 @@
+   Copyright 1999-2016  Alibaba Group Holding Ltd.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+1. reflection
+
+The MIT License (MIT)
+
+Copyright (c) 2016 Brad Hilton
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+2. ObjectMapper
+
+The MIT License (MIT)
+Copyright (c) 2014 Hearst
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Pods/HandyJSON/README.md

@@ -0,0 +1,695 @@
+# HandyJSON
+
+HandyJSON is a framework written in Swift which to make converting model objects( **pure classes/structs** ) to and from JSON easy on iOS.
+
+Compared with others, the most significant feature of HandyJSON is that it does not require the objects inherit from NSObject(**not using KVC but reflection**), neither implements a 'mapping' function(**writing value to memory directly to achieve property assignment**).
+
+HandyJSON is totally depend on the memory layout rules infered from Swift runtime code. We are watching it and will follow every bit if it changes.
+
+[![Build Status](https://travis-ci.org/alibaba/HandyJSON.svg?branch=master)](https://travis-ci.org/alibaba/HandyJSON)
+[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+[![Cocoapods Version](https://img.shields.io/cocoapods/v/HandyJSON.svg?style=flat)](http://cocoadocs.org/docsets/HandyJSON)
+[![Cocoapods Platform](https://img.shields.io/cocoapods/p/HandyJSON.svg?style=flat)](http://cocoadocs.org/docsets/HandyJSON)
+[![Codecov branch](https://img.shields.io/codecov/c/github/alibaba/HandyJSON/master.svg?style=flat)](https://codecov.io/gh/alibaba/HandyJSON/branch/master)
+
+## [中文文档](./README_cn.md)
+
+## 交流群
+
+群号: 581331250
+
+![交流群](qq_group.png)
+
+## Sample Code
+
+### Deserialization
+
+```swift
+class BasicTypes: HandyJSON {
+    var int: Int = 2
+    var doubleOptional: Double?
+    var stringImplicitlyUnwrapped: String!
+
+    required init() {}
+}
+
+let jsonString = "{\"doubleOptional\":1.1,\"stringImplicitlyUnwrapped\":\"hello\",\"int\":1}"
+if let object = BasicTypes.deserialize(from: jsonString) {
+    print(object.int)
+    print(object.doubleOptional!)
+    print(object.stringImplicitlyUnwrapped)
+}
+```
+
+### Serialization
+
+```swift
+
+let object = BasicTypes()
+object.int = 1
+object.doubleOptional = 1.1
+object.stringImplicitlyUnwrapped = “hello"
+
+print(object.toJSON()!) // serialize to dictionary
+print(object.toJSONString()!) // serialize to JSON string
+print(object.toJSONString(prettyPrint: true)!) // serialize to pretty JSON string
+```
+
+# Content
+
+- [Features](#features)
+- [Requirements](#requirements)
+- [Installation](#installation)
+    - [Cocoapods](#cocoapods)
+    - [Carthage](#carthage)
+    - [Manually](#manually)
+- [Deserialization](#deserialization)
+    - [The Basics](#the-basics)
+    - [Support Struct](#support-struct)
+    - [Support Enum Property](#support-enum-property)
+    - [Optional/ImplicitlyUnwrappedOptional/Collections/...](#optionalimplicitlyunwrappedoptionalcollections)
+    - [Designated Path](#designated-path)
+    - [Composition Object](#composition-object)
+    - [Inheritance Object](#inheritance-object)
+    - [JSON Array](#json-array)
+    - [Mapping From Dictionary](#mapping-from-dictionary)
+    - [Custom Mapping](#custom-mapping)
+    - [Date/Data/URL/Decimal/Color](#datedataurldecimalcolor)
+    - [Exclude Property](#exclude-property)
+    - [Update Existing Model](#update-existing-model)
+    - [Supported Property Type](#supported-property-type)
+- [Serialization](#serialization)
+    - [The Basics](#the-basics)
+    - [Mapping And Excluding](#mapping-and-excluding)
+- [FAQ](#faq)
+- [To Do](#to-do)
+
+# Features
+
+* Serialize/Deserialize Object/JSON to/From JSON/Object
+
+* Naturally use object property name for mapping, no need to specify a mapping relationship
+
+* Support almost all types in Swift, including enum
+
+* Support struct
+
+* Custom transformations
+
+* Type-Adaption, such as string json field maps to int property, int json field maps to string property
+
+An overview of types supported can be found at file: [BasicTypes.swift](./HandyJSONTest/BasicTypes.swift)
+
+# Requirements
+
+* iOS 8.0+/OSX 10.9+/watchOS 2.0+/tvOS 9.0+
+
+* Swift 3.0+ / Swift 4.0+ / Swift 5.0+
+
+# Installation
+
+**To use with Swift 5.0/5.1 ( Xcode 10.2+/11.0+ ), version == 5.0.1**
+
+**To use with Swift 4.2 ( Xcode 10 ), version == 4.2.0**
+
+**To use with Swift 4.0, version >= 4.1.1**
+
+**To use with Swift 3.x, version >= 1.8.0**
+
+For Legacy Swift2.x support, take a look at the [swift2 branch](https://github.com/alibaba/HandyJSON/tree/master_for_swift_2x).
+
+## Cocoapods
+
+Add the following line to your `Podfile`:
+
+```
+pod 'HandyJSON', '~> 5.0.1'
+```
+
+Then, run the following command:
+
+```
+$ pod install
+```
+
+## Carthage
+
+You can add a dependency on `HandyJSON` by adding the following line to your `Cartfile`:
+
+```
+github "alibaba/HandyJSON" ~> 5.0.1
+```
+
+## Manually
+
+You can integrate `HandyJSON` into your project manually by doing the following steps:
+
+* Open up `Terminal`, `cd` into your top-level project directory, and add `HandyJSON` as a submodule:
+
+```
+git init && git submodule add https://github.com/alibaba/HandyJSON.git
+```
+
+* Open the new `HandyJSON` folder, drag the `HandyJSON.xcodeproj` into the `Project Navigator` of your project.
+
+* Select your application project in the `Project Navigator`, open the `General` panel in the right window.
+
+* Click on the `+` button under the `Embedded Binaries` section.
+
+* You will see two different `HandyJSON.xcodeproj` folders each with four different versions of the HandyJSON.framework nested inside a Products folder.
+> It does not matter which Products folder you choose from, but it does matter which HandyJSON.framework you choose.
+
+* Select one of the four `HandyJSON.framework` which matches the platform your Application should run on.
+
+* Congratulations!
+
+# Deserialization
+
+## The Basics
+
+To support deserialization from JSON, a class/struct need to conform to 'HandyJSON' protocol. It's truly protocol, not some class inherited from NSObject.
+
+To conform to 'HandyJSON', a class need to implement an empty initializer.
+
+```swift
+class BasicTypes: HandyJSON {
+    var int: Int = 2
+    var doubleOptional: Double?
+    var stringImplicitlyUnwrapped: String!
+
+    required init() {}
+}
+
+let jsonString = "{\"doubleOptional\":1.1,\"stringImplicitlyUnwrapped\":\"hello\",\"int\":1}"
+if let object = BasicTypes.deserialize(from: jsonString) {
+    // …
+}
+```
+
+## Support Struct
+
+For struct, since the compiler provide a default empty initializer, we use it for free.
+
+```swift
+struct BasicTypes: HandyJSON {
+    var int: Int = 2
+    var doubleOptional: Double?
+    var stringImplicitlyUnwrapped: String!
+}
+
+let jsonString = "{\"doubleOptional\":1.1,\"stringImplicitlyUnwrapped\":\"hello\",\"int\":1}"
+if let object = BasicTypes.deserialize(from: jsonString) {
+    // …
+}
+```
+
+But also notice that, if you have a designated initializer to override the default one in the struct, you should explicitly declare an empty one(no `required` modifier need).
+
+## Support Enum Property
+
+To be convertable, An `enum` must conform to `HandyJSONEnum` protocol. Nothing special need to do now.
+
+```swift
+enum AnimalType: String, HandyJSONEnum {
+    case Cat = "cat"
+    case Dog = "dog"
+    case Bird = "bird"
+}
+
+struct Animal: HandyJSON {
+    var name: String?
+    var type: AnimalType?
+}
+
+let jsonString = "{\"type\":\"cat\",\"name\":\"Tom\"}"
+if let animal = Animal.deserialize(from: jsonString) {
+    print(animal.type?.rawValue)
+}
+```
+
+## Optional/ImplicitlyUnwrappedOptional/Collections/...
+
+'HandyJSON' support classes/structs composed of `optional`, `implicitlyUnwrappedOptional`, `array`, `dictionary`, `objective-c base type`, `nested type` etc. properties.
+
+```swift
+class BasicTypes: HandyJSON {
+    var bool: Bool = true
+    var intOptional: Int?
+    var doubleImplicitlyUnwrapped: Double!
+    var anyObjectOptional: Any?
+
+    var arrayInt: Array<Int> = []
+    var arrayStringOptional: Array<String>?
+    var setInt: Set<Int>?
+    var dictAnyObject: Dictionary<String, Any> = [:]
+
+    var nsNumber = 2
+    var nsString: NSString?
+
+    required init() {}
+}
+
+let object = BasicTypes()
+object.intOptional = 1
+object.doubleImplicitlyUnwrapped = 1.1
+object.anyObjectOptional = "StringValue"
+object.arrayInt = [1, 2]
+object.arrayStringOptional = ["a", "b"]
+object.setInt = [1, 2]
+object.dictAnyObject = ["key1": 1, "key2": "stringValue"]
+object.nsNumber = 2
+object.nsString = "nsStringValue"
+
+let jsonString = object.toJSONString()!
+
+if let object = BasicTypes.deserialize(from: jsonString) {
+    // ...
+}
+```
+
+## Designated Path
+
+`HandyJSON` supports deserialization from designated path of JSON.
+
+```swift
+class Cat: HandyJSON {
+    var id: Int64!
+    var name: String!
+
+    required init() {}
+}
+
+let jsonString = "{\"code\":200,\"msg\":\"success\",\"data\":{\"cat\":{\"id\":12345,\"name\":\"Kitty\"}}}"
+
+if let cat = Cat.deserialize(from: jsonString, designatedPath: "data.cat") {
+    print(cat.name)
+}
+```
+
+## Composition Object
+
+Notice that all the properties of a class/struct need to deserialized should be type conformed to `HandyJSON`.
+
+```swift
+class Component: HandyJSON {
+    var aInt: Int?
+    var aString: String?
+
+    required init() {}
+}
+
+class Composition: HandyJSON {
+    var aInt: Int?
+    var comp1: Component?
+    var comp2: Component?
+
+    required init() {}
+}
+
+let jsonString = "{\"num\":12345,\"comp1\":{\"aInt\":1,\"aString\":\"aaaaa\"},\"comp2\":{\"aInt\":2,\"aString\":\"bbbbb\"}}"
+
+if let composition = Composition.deserialize(from: jsonString) {
+    print(composition)
+}
+```
+
+## Inheritance Object
+
+A subclass need deserialization, it's superclass need to conform to `HandyJSON`.
+
+```swift
+class Animal: HandyJSON {
+    var id: Int?
+    var color: String?
+
+    required init() {}
+}
+
+class Cat: Animal {
+    var name: String?
+
+    required init() {}
+}
+
+let jsonString = "{\"id\":12345,\"color\":\"black\",\"name\":\"cat\"}"
+
+if let cat = Cat.deserialize(from: jsonString) {
+    print(cat)
+}
+```
+
+## JSON Array
+
+If the first level of a JSON text is an array, we turn it to objects array.
+
+```swift
+class Cat: HandyJSON {
+    var name: String?
+    var id: String?
+
+    required init() {}
+}
+
+let jsonArrayString: String? = "[{\"name\":\"Bob\",\"id\":\"1\"}, {\"name\":\"Lily\",\"id\":\"2\"}, {\"name\":\"Lucy\",\"id\":\"3\"}]"
+if let cats = [Cat].deserialize(from: jsonArrayString) {
+    cats.forEach({ (cat) in
+        // ...
+    })
+}
+```
+
+## Mapping From Dictionary
+
+`HandyJSON` support mapping swift dictionary to model.
+
+```swift
+var dict = [String: Any]()
+dict["doubleOptional"] = 1.1
+dict["stringImplicitlyUnwrapped"] = "hello"
+dict["int"] = 1
+if let object = BasicTypes.deserialize(from: dict) {
+    // ...
+}
+```
+
+## Custom Mapping
+
+`HandyJSON` let you customize the key mapping to JSON fields, or parsing method of any property. All you need to do is implementing an optional `mapping` function, do things in it.
+
+We bring the transformer from [`ObjectMapper`](https://github.com/Hearst-DD/ObjectMapper). If you are familiar with it, it’s almost the same here.
+
+```swift
+class Cat: HandyJSON {
+    var id: Int64!
+    var name: String!
+    var parent: (String, String)?
+    var friendName: String?
+
+    required init() {}
+
+    func mapping(mapper: HelpingMapper) {
+        // specify 'cat_id' field in json map to 'id' property in object
+        mapper <<<
+            self.id <-- "cat_id"
+
+        // specify 'parent' field in json parse as following to 'parent' property in object
+        mapper <<<
+            self.parent <-- TransformOf<(String, String), String>(fromJSON: { (rawString) -> (String, String)? in
+                if let parentNames = rawString?.characters.split(separator: "/").map(String.init) {
+                    return (parentNames[0], parentNames[1])
+                }
+                return nil
+            }, toJSON: { (tuple) -> String? in
+                if let _tuple = tuple {
+                    return "\(_tuple.0)/\(_tuple.1)"
+                }
+                return nil
+            })
+
+        // specify 'friend.name' path field in json map to 'friendName' property
+        mapper <<<
+            self.friendName <-- "friend.name"
+    }
+}
+
+let jsonString = "{\"cat_id\":12345,\"name\":\"Kitty\",\"parent\":\"Tom/Lily\",\"friend\":{\"id\":54321,\"name\":\"Lily\"}}"
+
+if let cat = Cat.deserialize(from: jsonString) {
+    print(cat.id)
+    print(cat.parent)
+    print(cat.friendName)
+}
+```
+
+## Date/Data/URL/Decimal/Color
+
+`HandyJSON` prepare some useful transformer for some none-basic type.
+
+```swift
+class ExtendType: HandyJSON {
+    var date: Date?
+    var decimal: NSDecimalNumber?
+    var url: URL?
+    var data: Data?
+    var color: UIColor?
+
+    func mapping(mapper: HelpingMapper) {
+        mapper <<<
+            date <-- CustomDateFormatTransform(formatString: "yyyy-MM-dd")
+
+        mapper <<<
+            decimal <-- NSDecimalNumberTransform()
+
+        mapper <<<
+            url <-- URLTransform(shouldEncodeURLString: false)
+
+        mapper <<<
+            data <-- DataTransform()
+
+        mapper <<<
+            color <-- HexColorTransform()
+    }
+
+    public required init() {}
+}
+
+let object = ExtendType()
+object.date = Date()
+object.decimal = NSDecimalNumber(string: "1.23423414371298437124391243")
+object.url = URL(string: "https://www.aliyun.com")
+object.data = Data(base64Encoded: "aGVsbG8sIHdvcmxkIQ==")
+object.color = UIColor.blue
+
+print(object.toJSONString()!)
+// it prints:
+// {"date":"2017-09-11","decimal":"1.23423414371298437124391243","url":"https:\/\/www.aliyun.com","data":"aGVsbG8sIHdvcmxkIQ==","color":"0000FF"}
+
+let mappedObject = ExtendType.deserialize(from: object.toJSONString()!)!
+print(mappedObject.date)
+...
+```
+
+## Exclude Property
+
+If any non-basic property of a class/struct could not conform to `HandyJSON`/`HandyJSONEnum` or you just do not want to do the deserialization with it, you should exclude it in the mapping function.
+
+```swift
+class NotHandyJSONType {
+    var dummy: String?
+}
+
+class Cat: HandyJSON {
+    var id: Int64!
+    var name: String!
+    var notHandyJSONTypeProperty: NotHandyJSONType?
+    var basicTypeButNotWantedProperty: String?
+
+    required init() {}
+
+    func mapping(mapper: HelpingMapper) {
+        mapper >>> self.notHandyJSONTypeProperty
+        mapper >>> self.basicTypeButNotWantedProperty
+    }
+}
+
+let jsonString = "{\"name\":\"cat\",\"id\":\"12345\"}"
+
+if let cat = Cat.deserialize(from: jsonString) {
+    print(cat)
+}
+```
+
+## Update Existing Model
+
+`HandyJSON` support updating an existing model with given json string or dictionary.
+
+```swift
+class BasicTypes: HandyJSON {
+    var int: Int = 2
+    var doubleOptional: Double?
+    var stringImplicitlyUnwrapped: String!
+
+    required init() {}
+}
+
+var object = BasicTypes()
+object.int = 1
+object.doubleOptional = 1.1
+
+let jsonString = "{\"doubleOptional\":2.2}"
+JSONDeserializer.update(object: &object, from: jsonString)
+print(object.int)
+print(object.doubleOptional)
+```
+
+## Supported Property Type
+
+* `Int`/`Bool`/`Double`/`Float`/`String`/`NSNumber`/`NSString`
+
+* `RawRepresentable` enum
+
+* `NSArray/NSDictionary`
+
+* `Int8/Int16/Int32/Int64`/`UInt8/UInt16/UInt23/UInt64`
+
+* `Optional<T>/ImplicitUnwrappedOptional<T>` // T is one of the above types
+
+* `Array<T>` // T is one of the above types
+
+* `Dictionary<String, T>` // T is one of the above types
+
+* Nested of aboves
+
+# Serialization
+
+## The Basics
+
+Now, a class/model which need to serialize to JSON should also conform to `HandyJSON` protocol.
+
+```swift
+class BasicTypes: HandyJSON {
+    var int: Int = 2
+    var doubleOptional: Double?
+    var stringImplicitlyUnwrapped: String!
+
+    required init() {}
+}
+
+let object = BasicTypes()
+object.int = 1
+object.doubleOptional = 1.1
+object.stringImplicitlyUnwrapped = “hello"
+
+print(object.toJSON()!) // serialize to dictionary
+print(object.toJSONString()!) // serialize to JSON string
+print(object.toJSONString(prettyPrint: true)!) // serialize to pretty JSON string
+```
+
+## Mapping And Excluding
+
+It’s all like what we do on deserialization. A property which is excluded, it will not take part in neither deserialization nor serialization. And the mapper items define both the deserializing rules and serializing rules. Refer to the usage above.
+
+# FAQ
+
+## Q: Why the mapping function is not working in the inheritance object?
+
+A: For some reason, you should define an empty mapping function in the super class(the root class if more than one layer), and override it in the subclass.
+
+It's the same with `didFinishMapping` function.
+
+## Q: Why my didSet/willSet is not working?
+
+A: Since `HandyJSON` assign properties by writing value to memory directly, it doesn't trigger any observing function. You need to call the `didSet/willSet` logic explicitly after/before the deserialization.
+
+But since version `1.8.0`, `HandyJSON` handle dynamic properties by the `KVC` mechanism which will trigger the `KVO`. That means, if you do really need the `didSet/willSet`, you can define your model like follow:
+
+```swift
+class BasicTypes: NSObject, HandyJSON {
+    dynamic var int: Int = 0 {
+        didSet {
+            print("oldValue: ", oldValue)
+        }
+        willSet {
+            print("newValue: ", newValue)
+        }
+    }
+
+    public override required init() {}
+}
+```
+
+In this situation, `NSObject` and `dynamic` are both needed.
+
+And in versions since `1.8.0`, `HandyJSON` offer a `didFinishMapping` function to allow you to fill some observing logic.
+
+```swift
+class BasicTypes: HandyJSON {
+    var int: Int?
+
+    required init() {}
+
+    func didFinishMapping() {
+        print("you can fill some observing logic here")
+    }
+}
+
+```
+
+It may help.
+
+## Q: How to support Enum property?
+
+It your enum conform to `RawRepresentable` protocol, please look into [Support Enum Property](#support-enum-property). Or use the `EnumTransform`:
+
+```swift
+enum EnumType: String {
+    case type1, type2
+}
+
+class BasicTypes: HandyJSON {
+    var type: EnumType?
+
+    func mapping(mapper: HelpingMapper) {
+        mapper <<<
+            type <-- EnumTransform()
+    }
+
+    required init() {}
+}
+
+let object = BasicTypes()
+object.type = EnumType.type2
+print(object.toJSONString()!)
+let mappedObject = BasicTypes.deserialize(from: object.toJSONString()!)!
+print(mappedObject.type)
+```
+
+Otherwise, you should implement your custom mapping function.
+
+```swift
+enum EnumType {
+    case type1, type2
+}
+
+class BasicTypes: HandyJSON {
+    var type: EnumType?
+
+    func mapping(mapper: HelpingMapper) {
+        mapper <<<
+            type <-- TransformOf<EnumType, String>(fromJSON: { (rawString) -> EnumType? in
+                if let _str = rawString {
+                    switch (_str) {
+                    case "type1":
+                        return EnumType.type1
+                    case "type2":
+                        return EnumType.type2
+                    default:
+                        return nil
+                    }
+                }
+                return nil
+            }, toJSON: { (enumType) -> String? in
+                if let _type = enumType {
+                    switch (_type) {
+                    case EnumType.type1:
+                        return "type1"
+                    case EnumType.type2:
+                        return "type2"
+                    }
+                }
+                return nil
+            })
+    }
+
+    required init() {}
+}
+```
+
+# Credit
+
+* [reflection](https://github.com/Zewo/Reflection): After the first version which used the swift mirror mechanism, HandyJSON had imported the reflection library and rewrote some code for class properties inspecting.
+* [ObjectMapper](https://github.com/tristanhimmelman/ObjectMapper): To make HandyJSON more compatible with the general style, the Mapper function support Transform which designed by ObjectMapper. And we import some testcases from ObjectMapper.
+
+# License
+
+HandyJSON is released under the Apache License, Version 2.0. See LICENSE for details.

Pods/HandyJSON/Source/AnyExtensions.swift

@@ -0,0 +1,89 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  AnyExtension.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 08/01/2017.
+//
+
+protocol AnyExtensions {}
+
+extension AnyExtensions {
+
+    public static func isValueTypeOrSubtype(_ value: Any) -> Bool {
+        return value is Self
+    }
+
+    public static func value(from storage: UnsafeRawPointer) -> Any {
+        return storage.assumingMemoryBound(to: self).pointee
+    }
+
+    public static func write(_ value: Any, to storage: UnsafeMutableRawPointer) {
+        guard let this = value as? Self else {
+            return
+        }
+        storage.assumingMemoryBound(to: self).pointee = this
+    }
+
+    public static func takeValue(from anyValue: Any) -> Self? {
+        return anyValue as? Self
+    }
+}
+
+func extensions(of type: Any.Type) -> AnyExtensions.Type {
+    struct Extensions : AnyExtensions {}
+    var extensions: AnyExtensions.Type = Extensions.self
+    withUnsafePointer(to: &extensions) { pointer in
+        UnsafeMutableRawPointer(mutating: pointer).assumingMemoryBound(to: Any.Type.self).pointee = type
+    }
+    return extensions
+}
+
+func extensions(of value: Any) -> AnyExtensions {
+    struct Extensions : AnyExtensions {}
+    var extensions: AnyExtensions = Extensions()
+    withUnsafePointer(to: &extensions) { pointer in
+        UnsafeMutableRawPointer(mutating: pointer).assumingMemoryBound(to: Any.self).pointee = value
+    }
+    return extensions
+}
+
+/// Tests if `value` is `type` or a subclass of `type`
+func value(_ value: Any, is type: Any.Type) -> Bool {
+    return extensions(of: type).isValueTypeOrSubtype(value)
+}
+
+/// Tests equality of any two existential types
+func == (lhs: Any.Type, rhs: Any.Type) -> Bool {
+    return Metadata(type: lhs) == Metadata(type: rhs)
+}
+
+// MARK: AnyExtension + Storage
+extension AnyExtensions {
+
+    mutating func storage() -> UnsafeRawPointer {
+        if type(of: self) is AnyClass {
+            let opaquePointer = Unmanaged.passUnretained(self as AnyObject).toOpaque()
+            return UnsafeRawPointer(opaquePointer)
+        } else {
+            return withUnsafePointer(to: &self) { pointer in
+                return UnsafeRawPointer(pointer)
+            }
+        }
+    }
+}

Pods/HandyJSON/Source/BuiltInBasicType.swift

@@ -0,0 +1,279 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//  Created by zhouzhuo on 7/7/16.
+//
+
+import Foundation
+
+protocol _BuiltInBasicType: _Transformable {
+
+    static func _transform(from object: Any) -> Self?
+    func _plainValue() -> Any?
+}
+
+// Suppport integer type
+
+protocol IntegerPropertyProtocol: FixedWidthInteger, _BuiltInBasicType {
+    init?(_ text: String, radix: Int)
+    init(_ number: NSNumber)
+}
+
+extension IntegerPropertyProtocol {
+
+    static func _transform(from object: Any) -> Self? {
+        switch object {
+        case let str as String:
+            return Self(str, radix: 10)
+        case let num as NSNumber:
+            return Self(num)
+        default:
+            return nil
+        }
+    }
+    
+    func _plainValue() -> Any? {
+        return self
+    }
+}
+
+extension Int: IntegerPropertyProtocol {}
+extension UInt: IntegerPropertyProtocol {}
+extension Int8: IntegerPropertyProtocol {}
+extension Int16: IntegerPropertyProtocol {}
+extension Int32: IntegerPropertyProtocol {}
+extension Int64: IntegerPropertyProtocol {}
+extension UInt8: IntegerPropertyProtocol {}
+extension UInt16: IntegerPropertyProtocol {}
+extension UInt32: IntegerPropertyProtocol {}
+extension UInt64: IntegerPropertyProtocol {}
+
+extension Bool: _BuiltInBasicType {
+
+    static func _transform(from object: Any) -> Bool? {
+        switch object {
+        case let str as NSString:
+            let lowerCase = str.lowercased
+            if ["0", "false"].contains(lowerCase) {
+                return false
+            }
+            if ["1", "true"].contains(lowerCase) {
+                return true
+            }
+            return nil
+        case let num as NSNumber:
+            return num.boolValue
+        default:
+            return nil
+        }
+    }
+
+    func _plainValue() -> Any? {
+        return self
+    }
+}
+
+// Support float type
+
+protocol FloatPropertyProtocol: _BuiltInBasicType, LosslessStringConvertible {
+    init(_ number: NSNumber)
+}
+
+extension FloatPropertyProtocol {
+
+    static func _transform(from object: Any) -> Self? {
+        switch object {
+        case let str as String:
+            return Self(str)
+        case let num as NSNumber:
+            return Self(num)
+        default:
+            return nil
+        }
+    }
+
+    func _plainValue() -> Any? {
+        return self
+    }
+}
+
+extension Float: FloatPropertyProtocol {}
+extension Double: FloatPropertyProtocol {}
+
+fileprivate let formatter: NumberFormatter = {
+    let formatter = NumberFormatter()
+    formatter.usesGroupingSeparator = false
+    formatter.numberStyle = .decimal
+    formatter.maximumFractionDigits = 16
+    return formatter
+}()
+
+extension String: _BuiltInBasicType {
+
+    static func _transform(from object: Any) -> String? {
+        switch object {
+        case let str as String:
+            return str
+        case let num as NSNumber:
+            // Boolean Type Inside
+            if NSStringFromClass(type(of: num)) == "__NSCFBoolean" {
+                if num.boolValue {
+                    return "true"
+                } else {
+                    return "false"
+                }
+            }
+            return formatter.string(from: num)
+        case _ as NSNull:
+            return nil
+        default:
+            return "\(object)"
+        }
+    }
+
+    func _plainValue() -> Any? {
+        return self
+    }
+}
+
+// MARK: Optional Support
+
+extension Optional: _BuiltInBasicType {
+
+    static func _transform(from object: Any) -> Optional? {
+        if let value = (Wrapped.self as? _Transformable.Type)?.transform(from: object) as? Wrapped {
+            return Optional(value)
+        } else if let value = object as? Wrapped {
+            return Optional(value)
+        }
+        return nil
+    }
+
+    func _getWrappedValue() -> Any? {
+        return self.map( { (wrapped) -> Any in
+            return wrapped as Any
+        })
+    }
+
+    func _plainValue() -> Any? {
+        if let value = _getWrappedValue() {
+            if let transformable = value as? _Transformable {
+                return transformable.plainValue()
+            } else {
+                return value
+            }
+        }
+        return nil
+    }
+}
+
+// MARK: Collection Support : Array & Set
+
+extension Collection {
+
+    static func _collectionTransform(from object: Any) -> [Iterator.Element]? {
+        guard let arr = object as? [Any] else {
+            InternalLogger.logDebug("Expect object to be an array but it's not")
+            return nil
+        }
+        typealias Element = Iterator.Element
+        var result: [Element] = [Element]()
+        arr.forEach { (each) in
+            if let element = (Element.self as? _Transformable.Type)?.transform(from: each) as? Element {
+                result.append(element)
+            } else if let element = each as? Element {
+                result.append(element)
+            }
+        }
+        return result
+    }
+
+    func _collectionPlainValue() -> Any? {
+        typealias Element = Iterator.Element
+        var result: [Any] = [Any]()
+        self.forEach { (each) in
+            if let transformable = each as? _Transformable, let transValue = transformable.plainValue() {
+                result.append(transValue)
+            } else {
+                InternalLogger.logError("value: \(each) isn't transformable type!")
+            }
+        }
+        return result
+    }
+}
+
+extension Array: _BuiltInBasicType {
+
+    static func _transform(from object: Any) -> [Element]? {
+        return self._collectionTransform(from: object)
+    }
+
+    func _plainValue() -> Any? {
+        return self._collectionPlainValue()
+    }
+}
+
+extension Set: _BuiltInBasicType {
+
+    static func _transform(from object: Any) -> Set<Element>? {
+        if let arr = self._collectionTransform(from: object) {
+            return Set(arr)
+        }
+        return nil
+    }
+
+    func _plainValue() -> Any? {
+        return self._collectionPlainValue()
+    }
+}
+
+// MARK: Dictionary Support
+
+extension Dictionary: _BuiltInBasicType {
+
+    static func _transform(from object: Any) -> [Key: Value]? {
+        guard let dict = object as? [String: Any] else {
+            InternalLogger.logDebug("Expect object to be an NSDictionary but it's not")
+            return nil
+        }
+        var result = [Key: Value]()
+        for (key, value) in dict {
+            if let sKey = key as? Key {
+                if let nValue = (Value.self as? _Transformable.Type)?.transform(from: value) as? Value {
+                    result[sKey] = nValue
+                } else if let nValue = value as? Value {
+                    result[sKey] = nValue
+                }
+            }
+        }
+        return result
+    }
+
+    func _plainValue() -> Any? {
+        var result = [String: Any]()
+        for (key, value) in self {
+            if let key = key as? String {
+                if let transformable = value as? _Transformable {
+                    if let transValue = transformable.plainValue() {
+                        result[key] = transValue
+                    }
+                }
+            }
+        }
+        return result
+    }
+}
+

Pods/HandyJSON/Source/BuiltInBridgeType.swift

@@ -0,0 +1,79 @@
+//
+//  BuiltInBridgeType.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 15/07/2017.
+//  Copyright © 2017 aliyun. All rights reserved.
+//
+
+import Foundation
+
+protocol _BuiltInBridgeType: _Transformable {
+
+    static func _transform(from object: Any) -> _BuiltInBridgeType?
+    func _plainValue() -> Any?
+}
+
+extension NSString: _BuiltInBridgeType {
+
+    static func _transform(from object: Any) -> _BuiltInBridgeType? {
+        if let str = String.transform(from: object) {
+            return NSString(string: str)
+        }
+        return nil
+    }
+
+    func _plainValue() -> Any? {
+        return self
+    }
+}
+
+extension NSNumber: _BuiltInBridgeType {
+
+    static func _transform(from object: Any) -> _BuiltInBridgeType? {
+        switch object {
+        case let num as NSNumber:
+            return num
+        case let str as NSString:
+            let lowercase = str.lowercased
+            if lowercase == "true" {
+                return NSNumber(booleanLiteral: true)
+            } else if lowercase == "false" {
+                return NSNumber(booleanLiteral: false)
+            } else {
+                // normal number
+                let formatter = NumberFormatter()
+                formatter.numberStyle = .decimal
+                return formatter.number(from: str as String)
+            }
+        default:
+            return nil
+        }
+    }
+
+    func _plainValue() -> Any? {
+        return self
+    }
+}
+
+extension NSArray: _BuiltInBridgeType {
+    
+    static func _transform(from object: Any) -> _BuiltInBridgeType? {
+        return object as? NSArray
+    }
+
+    func _plainValue() -> Any? {
+        return (self as? Array<Any>)?.plainValue()
+    }
+}
+
+extension NSDictionary: _BuiltInBridgeType {
+    
+    static func _transform(from object: Any) -> _BuiltInBridgeType? {
+        return object as? NSDictionary
+    }
+
+    func _plainValue() -> Any? {
+        return (self as? Dictionary<String, Any>)?.plainValue()
+    }
+}

Pods/HandyJSON/Source/CBridge.swift

@@ -0,0 +1,37 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  CBridge.swift
+//  HandyJSON
+//
+//  Created by chantu on 2018/7/15.
+//  Copyright © 2018 aliyun. All rights reserved.
+//
+
+import Foundation
+
+@_silgen_name("swift_getTypeByMangledNameInContext")
+public func _getTypeByMangledNameInContext(
+    _ name: UnsafePointer<UInt8>,
+    _ nameLength: Int,
+    genericContext: UnsafeRawPointer?,
+    genericArguments: UnsafeRawPointer?)
+    -> Any.Type?
+
+
+@_silgen_name("swift_getTypeContextDescriptor")
+public func _swift_getTypeContextDescriptor(_ metadata: UnsafeRawPointer?) -> UnsafeRawPointer?

Pods/HandyJSON/Source/Configuration.swift

@@ -0,0 +1,56 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Configuration.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 08/01/2017.
+//
+
+public struct DeserializeOptions: OptionSet {
+    public let rawValue: Int
+
+    public static let caseInsensitive = DeserializeOptions(rawValue: 1 << 0)
+
+    public static let defaultOptions: DeserializeOptions = []
+
+    public init(rawValue: Int) {
+        self.rawValue = rawValue
+    }
+}
+
+public enum DebugMode: Int {
+    case verbose = 0
+    case debug = 1
+    case error = 2
+    case none = 3
+}
+
+public struct HandyJSONConfiguration {
+
+    private static var _mode = DebugMode.error
+    public static var debugMode: DebugMode {
+        get {
+            return _mode
+        }
+        set {
+            _mode = newValue
+        }
+    }
+
+    public static var deserializeOptions: DeserializeOptions = .defaultOptions
+}

Pods/HandyJSON/Source/ContextDescriptorType.swift

@@ -0,0 +1,170 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Created by zhouzhuo on 07/01/2017.
+//
+
+protocol ContextDescriptorType : MetadataType {
+    var contextDescriptorOffsetLocation: Int { get }
+}
+
+extension ContextDescriptorType {
+
+    var contextDescriptor: ContextDescriptorProtocol? {
+        let pointer = UnsafePointer<Int>(self.pointer)
+        let base = pointer.advanced(by: contextDescriptorOffsetLocation)
+        if base.pointee == 0 {
+            // swift class created dynamically in objc-runtime didn't have valid contextDescriptor
+            return nil
+        }
+        if self.kind == .class {
+            return ContextDescriptor<_ClassContextDescriptor>(pointer: relativePointer(base: base, offset: base.pointee - Int(bitPattern: base)))
+        } else {
+            return ContextDescriptor<_StructContextDescriptor>(pointer: relativePointer(base: base, offset: base.pointee - Int(bitPattern: base)))
+        }
+    }
+
+    var contextDescriptorPointer: UnsafeRawPointer? {
+        let pointer = UnsafePointer<Int>(self.pointer)
+        let base = pointer.advanced(by: contextDescriptorOffsetLocation)
+        if base.pointee == 0 {
+            return nil
+        }
+        return UnsafeRawPointer(bitPattern: base.pointee)
+    }
+
+//    var genericArgumentVector: UnsafeRawPointer? {
+//        let pointer = UnsafePointer<Int>(self.pointer)
+//        let base = pointer.advanced(by: 19)
+//        if base.pointee == 0 {
+//            return nil
+//        }
+//        return UnsafeRawPointer(base)
+//    }
+
+    var mangledName: String {
+        let pointer = UnsafePointer<Int>(self.pointer)
+        let base = pointer.advanced(by: contextDescriptorOffsetLocation)
+        let mangledNameAddress = base.pointee + 2 * 4 // 2 properties in front
+        if let offset = contextDescriptor?.mangledName,
+            let cString = UnsafePointer<UInt8>(bitPattern: mangledNameAddress + offset) {
+            return String(cString: cString)
+        }
+        return ""
+    }
+
+    var numberOfFields: Int {
+        return contextDescriptor?.numberOfFields ?? 0
+    }
+
+    var fieldOffsets: [Int]? {
+        guard let contextDescriptor = self.contextDescriptor else {
+            return nil
+        }
+        let vectorOffset = contextDescriptor.fieldOffsetVector
+        guard vectorOffset != 0 else {
+            return nil
+        }
+        if self.kind == .class {
+            return (0..<contextDescriptor.numberOfFields).map {
+                return UnsafePointer<Int>(pointer)[vectorOffset + $0]
+            }
+        } else {
+            return (0..<contextDescriptor.numberOfFields).map {
+                return Int(UnsafePointer<Int32>(pointer)[vectorOffset * (is64BitPlatform ? 2 : 1) + $0])
+            }
+        }
+    }
+
+    var reflectionFieldDescriptor: FieldDescriptor? {
+        guard let contextDescriptor = self.contextDescriptor else {
+            return nil
+        }
+        let pointer = UnsafePointer<Int>(self.pointer)
+        let base = pointer.advanced(by: contextDescriptorOffsetLocation)
+        let offset = contextDescriptor.reflectionFieldDescriptor
+        let address = base.pointee + 4 * 4 // (4 properties in front) * (sizeof Int32)
+        guard let fieldDescriptorPtr = UnsafePointer<_FieldDescriptor>(bitPattern: address + offset) else {
+            return nil
+        }
+        return FieldDescriptor(pointer: fieldDescriptorPtr)
+    }
+}
+
+protocol ContextDescriptorProtocol {
+    var mangledName: Int { get }
+    var numberOfFields: Int { get }
+    var fieldOffsetVector: Int { get }
+    var reflectionFieldDescriptor: Int { get }
+}
+
+struct ContextDescriptor<T: _ContextDescriptorProtocol>: ContextDescriptorProtocol, PointerType {
+
+    var pointer: UnsafePointer<T>
+
+    var mangledName: Int {
+        return Int(pointer.pointee.mangledNameOffset)
+    }
+
+    var numberOfFields: Int {
+        return Int(pointer.pointee.numberOfFields)
+    }
+
+    var fieldOffsetVector: Int {
+        return Int(pointer.pointee.fieldOffsetVector)
+    }
+
+    var fieldTypesAccessor: Int {
+        return Int(pointer.pointee.fieldTypesAccessor)
+    }
+
+    var reflectionFieldDescriptor: Int {
+        return Int(pointer.pointee.reflectionFieldDescriptor)
+    }
+}
+
+protocol _ContextDescriptorProtocol {
+    var mangledNameOffset: Int32 { get }
+    var numberOfFields: Int32 { get }
+    var fieldOffsetVector: Int32 { get }
+    var fieldTypesAccessor: Int32 { get }
+    var reflectionFieldDescriptor: Int32 { get }
+}
+
+struct _StructContextDescriptor: _ContextDescriptorProtocol {
+    var flags: Int32
+    var parent: Int32
+    var mangledNameOffset: Int32
+    var fieldTypesAccessor: Int32
+    var reflectionFieldDescriptor: Int32
+    var numberOfFields: Int32
+    var fieldOffsetVector: Int32
+}
+
+struct _ClassContextDescriptor: _ContextDescriptorProtocol {
+    var flags: Int32
+    var parent: Int32
+    var mangledNameOffset: Int32
+    var fieldTypesAccessor: Int32
+    var reflectionFieldDescriptor: Int32
+    var superClsRef: Int32
+    var metadataNegativeSizeInWords: Int32
+    var metadataPositiveSizeInWords: Int32
+    var numImmediateMembers: Int32
+    var numberOfFields: Int32
+    var fieldOffsetVector: Int32
+}

Pods/HandyJSON/Source/CustomDateFormatTransform.swift

@@ -0,0 +1,40 @@
+//
+//  CustomDateFormatTransform.swift
+//  ObjectMapper
+//
+//  Created by Dan McCracken on 3/8/15.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class CustomDateFormatTransform: DateFormatterTransform {
+
+    public init(formatString: String) {
+		let formatter = DateFormatter()
+		formatter.locale = Locale(identifier: "en_US_POSIX")
+		formatter.dateFormat = formatString
+
+		super.init(dateFormatter: formatter)
+    }
+}

Pods/HandyJSON/Source/DataTransform.swift

@@ -0,0 +1,50 @@
+//
+//  DataTransform.swift
+//  ObjectMapper
+//
+//  Created by Yagrushkin, Evgeny on 8/30/16.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class DataTransform: TransformType {
+	public typealias Object = Data
+	public typealias JSON = String
+
+	public init() {}
+
+	open func transformFromJSON(_ value: Any?) -> Data? {
+		guard let string = value as? String else{
+			return nil
+		}
+		return Data(base64Encoded: string)
+	}
+
+	open func transformToJSON(_ value: Data?) -> String? {
+		guard let data = value else{
+			return nil
+		}
+		return data.base64EncodedString()
+	}
+}

Pods/HandyJSON/Source/DateFormatterTransform.swift

@@ -0,0 +1,54 @@
+//
+//  DateFormatterTransform.swift
+//  ObjectMapper
+//
+//  Created by Tristan Himmelman on 2015-03-09.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class DateFormatterTransform: TransformType {
+	public typealias Object = Date
+	public typealias JSON = String
+
+	public let dateFormatter: DateFormatter
+
+	public init(dateFormatter: DateFormatter) {
+		self.dateFormatter = dateFormatter
+	}
+
+	open func transformFromJSON(_ value: Any?) -> Date? {
+		if let dateString = value as? String {
+			return dateFormatter.date(from: dateString)
+		}
+		return nil
+	}
+
+	open func transformToJSON(_ value: Date?) -> String? {
+		if let date = value {
+			return dateFormatter.string(from: date)
+		}
+		return nil
+	}
+}

Pods/HandyJSON/Source/DateTransform.swift

@@ -0,0 +1,55 @@
+//
+//  DateTransform.swift
+//  ObjectMapper
+//
+//  Created by Tristan Himmelman on 2014-10-13.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class DateTransform: TransformType {
+	public typealias Object = Date
+	public typealias JSON = Double
+
+	public init() {}
+
+	open func transformFromJSON(_ value: Any?) -> Date? {
+		if let timeInt = value as? Double {
+			return Date(timeIntervalSince1970: TimeInterval(timeInt))
+		}
+
+		if let timeStr = value as? String {
+			return Date(timeIntervalSince1970: TimeInterval(atof(timeStr)))
+		}
+
+		return nil
+	}
+
+	open func transformToJSON(_ value: Date?) -> Double? {
+		if let date = value {
+			return Double(date.timeIntervalSince1970)
+		}
+		return nil
+	}
+}

Pods/HandyJSON/Source/Deserializer.swift

@@ -0,0 +1,181 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//  Created by zhouzhuo on 7/7/16.
+//
+
+import Foundation
+
+public extension HandyJSON {
+
+    /// Finds the internal dictionary in `dict` as the `designatedPath` specified, and converts it to a Model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer
+    static func deserialize(from dict: NSDictionary?, designatedPath: String? = nil) -> Self? {
+        return deserialize(from: dict as? [String: Any], designatedPath: designatedPath)
+    }
+
+    /// Finds the internal dictionary in `dict` as the `designatedPath` specified, and converts it to a Model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer
+    static func deserialize(from dict: [String: Any]?, designatedPath: String? = nil) -> Self? {
+        return JSONDeserializer<Self>.deserializeFrom(dict: dict, designatedPath: designatedPath)
+    }
+
+    /// Finds the internal JSON field in `json` as the `designatedPath` specified, and converts it to a Model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer
+    static func deserialize(from json: String?, designatedPath: String? = nil) -> Self? {
+        return JSONDeserializer<Self>.deserializeFrom(json: json, designatedPath: designatedPath)
+    }
+}
+
+public extension Array where Element: HandyJSON {
+
+    /// if the JSON field finded by `designatedPath` in `json` is representing a array, such as `[{...}, {...}, {...}]`,
+    /// this method converts it to a Models array
+    static func deserialize(from json: String?, designatedPath: String? = nil) -> [Element?]? {
+        return JSONDeserializer<Element>.deserializeModelArrayFrom(json: json, designatedPath: designatedPath)
+    }
+
+    /// deserialize model array from NSArray
+    static func deserialize(from array: NSArray?) -> [Element?]? {
+        return JSONDeserializer<Element>.deserializeModelArrayFrom(array: array)
+    }
+
+    /// deserialize model array from array
+    static func deserialize(from array: [Any]?) -> [Element?]? {
+        return JSONDeserializer<Element>.deserializeModelArrayFrom(array: array)
+    }
+}
+
+public class JSONDeserializer<T: HandyJSON> {
+
+    /// Finds the internal dictionary in `dict` as the `designatedPath` specified, and map it to a Model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer, or nil
+    public static func deserializeFrom(dict: NSDictionary?, designatedPath: String? = nil) -> T? {
+        return deserializeFrom(dict: dict as? [String: Any], designatedPath: designatedPath)
+    }
+
+    /// Finds the internal dictionary in `dict` as the `designatedPath` specified, and map it to a Model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer, or nil
+    public static func deserializeFrom(dict: [String: Any]?, designatedPath: String? = nil) -> T? {
+        var targetDict = dict
+        if let path = designatedPath {
+            targetDict = getInnerObject(inside: targetDict, by: path) as? [String: Any]
+        }
+        if let _dict = targetDict {
+            return T._transform(dict: _dict) as? T
+        }
+        return nil
+    }
+
+    /// Finds the internal JSON field in `json` as the `designatedPath` specified, and converts it to Model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer, or nil
+    public static func deserializeFrom(json: String?, designatedPath: String? = nil) -> T? {
+        guard let _json = json else {
+            return nil
+        }
+        do {
+            let jsonObject = try JSONSerialization.jsonObject(with: _json.data(using: String.Encoding.utf8)!, options: .allowFragments)
+            if let jsonDict = jsonObject as? NSDictionary {
+                return self.deserializeFrom(dict: jsonDict, designatedPath: designatedPath)
+            }
+        } catch let error {
+            InternalLogger.logError(error)
+        }
+        return nil
+    }
+
+    /// Finds the internal dictionary in `dict` as the `designatedPath` specified, and use it to reassign an exist model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer, or nil
+    public static func update(object: inout T, from dict: [String: Any]?, designatedPath: String? = nil) {
+        var targetDict = dict
+        if let path = designatedPath {
+            targetDict = getInnerObject(inside: targetDict, by: path) as? [String: Any]
+        }
+        if let _dict = targetDict {
+            T._transform(dict: _dict, to: &object)
+        }
+    }
+
+    /// Finds the internal JSON field in `json` as the `designatedPath` specified, and use it to reassign an exist model
+    /// `designatedPath` is a string like `result.data.orderInfo`, which each element split by `.` represents key of each layer, or nil
+    public static func update(object: inout T, from json: String?, designatedPath: String? = nil) {
+        guard let _json = json else {
+            return
+        }
+        do {
+            let jsonObject = try JSONSerialization.jsonObject(with: _json.data(using: String.Encoding.utf8)!, options: .allowFragments)
+            if let jsonDict = jsonObject as? [String: Any] {
+                update(object: &object, from: jsonDict, designatedPath: designatedPath)
+            }
+        } catch let error {
+            InternalLogger.logError(error)
+        }
+    }
+
+    /// if the JSON field found by `designatedPath` in `json` is representing a array, such as `[{...}, {...}, {...}]`,
+    /// this method converts it to a Models array
+    public static func deserializeModelArrayFrom(json: String?, designatedPath: String? = nil) -> [T?]? {
+        guard let _json = json else {
+            return nil
+        }
+        do {
+            let jsonObject = try JSONSerialization.jsonObject(with: _json.data(using: String.Encoding.utf8)!, options: .allowFragments)
+            if let jsonArray = getInnerObject(inside: jsonObject, by: designatedPath) as? [Any] {
+                return jsonArray.map({ (item) -> T? in
+                    return self.deserializeFrom(dict: item as? [String: Any])
+                })
+            }
+        } catch let error {
+            InternalLogger.logError(error)
+        }
+        return nil
+    }
+
+    /// mapping raw array to Models array
+    public static func deserializeModelArrayFrom(array: NSArray?) -> [T?]? {
+        return deserializeModelArrayFrom(array: array as? [Any])
+    }
+
+    /// mapping raw array to Models array
+    public static func deserializeModelArrayFrom(array: [Any]?) -> [T?]? {
+        guard let _arr = array else {
+            return nil
+        }
+        return _arr.map({ (item) -> T? in
+            return self.deserializeFrom(dict: item as? NSDictionary)
+        })
+    }
+}
+
+fileprivate func getInnerObject(inside object: Any?, by designatedPath: String?) -> Any? {
+    var result: Any? = object
+    var abort = false
+    if let paths = designatedPath?.components(separatedBy: "."), paths.count > 0 {
+        var next = object as? [String: Any]
+        paths.forEach({ (seg) in
+            if seg.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines) == "" || abort {
+                return
+            }
+            if let _next = next?[seg] {
+                result = _next
+                next = _next as? [String: Any]
+            } else {
+                abort = true
+            }
+        })
+    }
+    return abort ? nil : result
+}

Pods/HandyJSON/Source/EnumTransform.swift

@@ -0,0 +1,50 @@
+//
+//  EnumTransform.swift
+//  ObjectMapper
+//
+//  Created by Kaan Dedeoglu on 3/20/15.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class EnumTransform<T: RawRepresentable>: TransformType {
+	public typealias Object = T
+	public typealias JSON = T.RawValue
+
+	public init() {}
+
+	open func transformFromJSON(_ value: Any?) -> T? {
+		if let raw = value as? T.RawValue {
+			return T(rawValue: raw)
+		}
+		return nil
+	}
+
+	open func transformToJSON(_ value: T?) -> T.RawValue? {
+		if let obj = value {
+			return obj.rawValue
+		}
+		return nil
+	}
+}

Pods/HandyJSON/Source/EnumType.swift

@@ -0,0 +1,31 @@
+//
+//  EnumType.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 16/07/2017.
+//  Copyright © 2017 aliyun. All rights reserved.
+//
+
+import Foundation
+
+public protocol _RawEnumProtocol: _Transformable {
+
+    static func _transform(from object: Any) -> Self?
+    func _plainValue() -> Any?
+}
+
+extension RawRepresentable where Self: _RawEnumProtocol {
+
+    public static func _transform(from object: Any) -> Self? {
+        if let transformableType = RawValue.self as? _Transformable.Type {
+            if let typedValue = transformableType.transform(from: object) {
+                return Self(rawValue: typedValue as! RawValue)
+            }
+        }
+        return nil
+    }
+
+    public func _plainValue() -> Any? {
+        return self.rawValue
+    }
+}

Pods/HandyJSON/Source/Export.swift

@@ -0,0 +1,15 @@
+//
+//  Export.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 16/07/2017.
+//  Copyright © 2017 aliyun. All rights reserved.
+//
+
+import Foundation
+
+public protocol HandyJSONCustomTransformable: _ExtendCustomBasicType {}
+
+public protocol HandyJSON: _ExtendCustomModelType {}
+
+public protocol HandyJSONEnum: _RawEnumProtocol {}

Pods/HandyJSON/Source/ExtendCustomBasicType.swift

@@ -0,0 +1,28 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  ExtendCustomBasicType.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 05/09/2017.
+//
+
+public protocol _ExtendCustomBasicType: _Transformable {
+
+    static func _transform(from object: Any) -> Self?
+    func _plainValue() -> Any?
+}

Pods/HandyJSON/Source/ExtendCustomModelType.swift

@@ -0,0 +1,277 @@
+//
+//  ExtendCustomType.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 16/07/2017.
+//  Copyright © 2017 aliyun. All rights reserved.
+//
+
+import Foundation
+
+public protocol _ExtendCustomModelType: _Transformable {
+    init()
+    mutating func willStartMapping()
+    mutating func mapping(mapper: HelpingMapper)
+    mutating func didFinishMapping()
+}
+
+extension _ExtendCustomModelType {
+
+    public mutating func willStartMapping() {}
+    public mutating func mapping(mapper: HelpingMapper) {}
+    public mutating func didFinishMapping() {}
+}
+
+fileprivate func convertKeyIfNeeded(dict: [String: Any]) -> [String: Any] {
+    if HandyJSONConfiguration.deserializeOptions.contains(.caseInsensitive) {
+        var newDict = [String: Any]()
+        dict.forEach({ (kvPair) in
+            let (key, value) = kvPair
+            newDict[key.lowercased()] = value
+        })
+        return newDict
+    }
+    return dict
+}
+
+fileprivate func getRawValueFrom(dict: [String: Any], property: PropertyInfo, mapper: HelpingMapper) -> Any? {
+    let address = Int(bitPattern: property.address)
+    if let mappingHandler = mapper.getMappingHandler(key: address) {
+        if let mappingPaths = mappingHandler.mappingPaths, mappingPaths.count > 0 {
+            for mappingPath in mappingPaths {
+                if let _value = dict.findValueBy(path: mappingPath) {
+                    return _value
+                }
+            }
+            return nil
+        }
+    }
+    if HandyJSONConfiguration.deserializeOptions.contains(.caseInsensitive) {
+        return dict[property.key.lowercased()]
+    }
+    return dict[property.key]
+}
+
+fileprivate func convertValue(rawValue: Any, property: PropertyInfo, mapper: HelpingMapper) -> Any? {
+    if rawValue is NSNull { return nil }
+    if let mappingHandler = mapper.getMappingHandler(key: Int(bitPattern: property.address)), let transformer = mappingHandler.assignmentClosure {
+        return transformer(rawValue)
+    }
+    if let transformableType = property.type as? _Transformable.Type {
+        return transformableType.transform(from: rawValue)
+    } else {
+        return extensions(of: property.type).takeValue(from: rawValue)
+    }
+}
+
+fileprivate func assignProperty(convertedValue: Any, instance: _ExtendCustomModelType, property: PropertyInfo) {
+    if property.bridged {
+        (instance as! NSObject).setValue(convertedValue, forKey: property.key)
+    } else {
+        extensions(of: property.type).write(convertedValue, to: property.address)
+    }
+}
+
+fileprivate func readAllChildrenFrom(mirror: Mirror) -> [(String, Any)] {
+    var children = [(label: String?, value: Any)]()
+    let mirrorChildrenCollection = AnyRandomAccessCollection(mirror.children)!
+    children += mirrorChildrenCollection
+
+    var currentMirror = mirror
+    while let superclassChildren = currentMirror.superclassMirror?.children {
+        let randomCollection = AnyRandomAccessCollection(superclassChildren)!
+        children += randomCollection
+        currentMirror = currentMirror.superclassMirror!
+    }
+    var result = [(String, Any)]()
+    children.forEach { (child) in
+        if let _label = child.label {
+            result.append((_label, child.value))
+        }
+    }
+    return result
+}
+
+fileprivate func merge(children: [(String, Any)], propertyInfos: [PropertyInfo]) -> [String: (Any, PropertyInfo?)] {
+    var infoDict = [String: PropertyInfo]()
+    propertyInfos.forEach { (info) in
+        infoDict[info.key] = info
+    }
+
+    var result = [String: (Any, PropertyInfo?)]()
+    children.forEach { (child) in
+        result[child.0] = (child.1, infoDict[child.0])
+    }
+    return result
+}
+
+// this's a workaround before https://bugs.swift.org/browse/SR-5223 fixed
+extension NSObject {
+    static func createInstance() -> NSObject {
+        return self.init()
+    }
+}
+
+extension _ExtendCustomModelType {
+
+    static func _transform(from object: Any) -> Self? {
+        if let dict = object as? [String: Any] {
+            // nested object, transform recursively
+            return self._transform(dict: dict) as? Self
+        }
+        return nil
+    }
+
+    static func _transform(dict: [String: Any]) -> _ExtendCustomModelType? {
+
+        var instance: Self
+        if let _nsType = Self.self as? NSObject.Type {
+            instance = _nsType.createInstance() as! Self
+        } else {
+            instance = Self.init()
+        }
+        instance.willStartMapping()
+        _transform(dict: dict, to: &instance)
+        instance.didFinishMapping()
+        return instance
+    }
+
+    static func _transform(dict: [String: Any], to instance: inout Self) {
+        guard let properties = getProperties(forType: Self.self) else {
+            InternalLogger.logDebug("Failed when try to get properties from type: \(type(of: Self.self))")
+            return
+        }
+
+        // do user-specified mapping first
+        let mapper = HelpingMapper()
+        instance.mapping(mapper: mapper)
+
+        // get head addr
+        let rawPointer = instance.headPointer()
+        InternalLogger.logVerbose("instance start at: ", Int(bitPattern: rawPointer))
+
+        // process dictionary
+        let _dict = convertKeyIfNeeded(dict: dict)
+
+        let instanceIsNsObject = instance.isNSObjectType()
+        let bridgedPropertyList = instance.getBridgedPropertyList()
+
+        for property in properties {
+            let isBridgedProperty = instanceIsNsObject && bridgedPropertyList.contains(property.key)
+
+            let propAddr = rawPointer.advanced(by: property.offset)
+            InternalLogger.logVerbose(property.key, "address at: ", Int(bitPattern: propAddr))
+            if mapper.propertyExcluded(key: Int(bitPattern: propAddr)) {
+                InternalLogger.logDebug("Exclude property: \(property.key)")
+                continue
+            }
+
+            let propertyDetail = PropertyInfo(key: property.key, type: property.type, address: propAddr, bridged: isBridgedProperty)
+            InternalLogger.logVerbose("field: ", property.key, "  offset: ", property.offset, "  isBridgeProperty: ", isBridgedProperty)
+
+            if let rawValue = getRawValueFrom(dict: _dict, property: propertyDetail, mapper: mapper) {
+                if let convertedValue = convertValue(rawValue: rawValue, property: propertyDetail, mapper: mapper) {
+                    assignProperty(convertedValue: convertedValue, instance: instance, property: propertyDetail)
+                    continue
+                }
+            }
+            InternalLogger.logDebug("Property: \(property.key) hasn't been written in")
+        }
+    }
+}
+
+extension _ExtendCustomModelType {
+
+    func _plainValue() -> Any? {
+        return Self._serializeAny(object: self)
+    }
+
+    static func _serializeAny(object: _Transformable) -> Any? {
+
+        let mirror = Mirror(reflecting: object)
+
+        guard let displayStyle = mirror.displayStyle else {
+            return object.plainValue()
+        }
+
+        // after filtered by protocols above, now we expect the type is pure struct/class
+        switch displayStyle {
+        case .class, .struct:
+            let mapper = HelpingMapper()
+            // do user-specified mapping first
+            if !(object is _ExtendCustomModelType) {
+                InternalLogger.logDebug("This model of type: \(type(of: object)) is not mappable but is class/struct type")
+                return object
+            }
+
+            let children = readAllChildrenFrom(mirror: mirror)
+
+            guard let properties = getProperties(forType: type(of: object)) else {
+                InternalLogger.logError("Can not get properties info for type: \(type(of: object))")
+                return nil
+            }
+
+            var mutableObject = object as! _ExtendCustomModelType
+            let instanceIsNsObject = mutableObject.isNSObjectType()
+            let head = mutableObject.headPointer()
+            let bridgedProperty = mutableObject.getBridgedPropertyList()
+            let propertyInfos = properties.map({ (desc) -> PropertyInfo in
+                return PropertyInfo(key: desc.key, type: desc.type, address: head.advanced(by: desc.offset),
+                                        bridged: instanceIsNsObject && bridgedProperty.contains(desc.key))
+            })
+
+            mutableObject.mapping(mapper: mapper)
+
+            let requiredInfo = merge(children: children, propertyInfos: propertyInfos)
+
+            return _serializeModelObject(instance: mutableObject, properties: requiredInfo, mapper: mapper) as Any
+        default:
+            return object.plainValue()
+        }
+    }
+
+    static func _serializeModelObject(instance: _ExtendCustomModelType, properties: [String: (Any, PropertyInfo?)], mapper: HelpingMapper) -> [String: Any] {
+
+        var dict = [String: Any]()
+        for (key, property) in properties {
+            var realKey = key
+            var realValue = property.0
+
+            if let info = property.1 {
+                if info.bridged, let _value = (instance as! NSObject).value(forKey: key) {
+                    realValue = _value
+                }
+
+                if mapper.propertyExcluded(key: Int(bitPattern: info.address)) {
+                    continue
+                }
+
+                if let mappingHandler = mapper.getMappingHandler(key: Int(bitPattern: info.address)) {
+                    // if specific key is set, replace the label
+                    if let mappingPaths = mappingHandler.mappingPaths, mappingPaths.count > 0 {
+                        // take the first path, last segment if more than one
+                        realKey = mappingPaths[0].segments.last!
+                    }
+
+                    if let transformer = mappingHandler.takeValueClosure {
+                        if let _transformedValue = transformer(realValue) {
+                            dict[realKey] = _transformedValue
+                        }
+                        continue
+                    }
+                }
+            }
+
+            if let typedValue = realValue as? _Transformable {
+                if let result = self._serializeAny(object: typedValue) {
+                    dict[realKey] = result
+                    continue
+                }
+            }
+
+            InternalLogger.logDebug("The value for key: \(key) is not transformable type")
+        }
+        return dict
+    }
+}
+

Pods/HandyJSON/Source/FieldDescriptor.swift

@@ -0,0 +1,97 @@
+//
+//  FieldDescriptor.swift
+//  HandyJSON
+//
+//  Created by chantu on 2019/1/31.
+//  Copyright © 2019 aliyun. All rights reserved.
+//
+
+import Foundation
+
+enum FieldDescriptorKind : UInt16 {
+    // Swift nominal types.
+    case Struct = 0
+    case Class
+    case Enum
+
+    // Fixed-size multi-payload enums have a special descriptor format that
+    // encodes spare bits.
+    //
+    // FIXME: Actually implement this. For now, a descriptor with this kind
+    // just means we also have a builtin descriptor from which we get the
+    // size and alignment.
+    case MultiPayloadEnum
+
+    // A Swift opaque protocol. There are no fields, just a record for the
+    // type itself.
+    case `Protocol`
+
+    // A Swift class-bound protocol.
+    case ClassProtocol
+
+    // An Objective-C protocol, which may be imported or defined in Swift.
+    case ObjCProtocol
+
+    // An Objective-C class, which may be imported or defined in Swift.
+    // In the former case, field type metadata is not emitted, and
+    // must be obtained from the Objective-C runtime.
+    case ObjCClass
+}
+
+struct FieldDescriptor: PointerType {
+
+    var pointer: UnsafePointer<_FieldDescriptor>
+
+    var fieldRecordSize: Int {
+        return Int(pointer.pointee.fieldRecordSize)
+    }
+
+    var numFields: Int {
+        return Int(pointer.pointee.numFields)
+    }
+
+    var fieldRecords: [FieldRecord] {
+        return (0..<numFields).map({ (i) -> FieldRecord in
+            return FieldRecord(pointer: UnsafePointer<_FieldRecord>(pointer + 1) + i)
+        })
+    }
+}
+
+struct _FieldDescriptor {
+    var mangledTypeNameOffset: Int32
+    var superClassOffset: Int32
+    var fieldDescriptorKind: FieldDescriptorKind
+    var fieldRecordSize: Int16
+    var numFields: Int32
+}
+
+struct FieldRecord: PointerType {
+
+    var pointer: UnsafePointer<_FieldRecord>
+
+    var fieldRecordFlags: Int {
+        return Int(pointer.pointee.fieldRecordFlags)
+    }
+
+    var mangledTypeName: UnsafePointer<UInt8>? {
+        let address = Int(bitPattern: pointer) + 1 * 4
+        let offset = Int(pointer.pointee.mangledTypeNameOffset)
+        let cString = UnsafePointer<UInt8>(bitPattern: address + offset)
+        return cString
+    }
+
+    var fieldName: String {
+        let address = Int(bitPattern: pointer) + 2 * 4
+        let offset = Int(pointer.pointee.fieldNameOffset)
+        if let cString = UnsafePointer<UInt8>(bitPattern: address + offset) {
+            return String(cString: cString)
+        }
+        return ""
+    }
+}
+
+struct _FieldRecord {
+    var fieldRecordFlags: Int32
+    var mangledTypeNameOffset: Int32
+    var fieldNameOffset: Int32
+}

Pods/HandyJSON/Source/HandyJSON.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//  Created by zhouzhuo on 7/11/16.
+//
+
+@import Foundation;
+
+//! Project version number for HandyJSON.
+FOUNDATION_EXPORT double HandyJSONVersionNumber;
+
+//! Project version string for HandyJSON.
+FOUNDATION_EXPORT const unsigned char HandyJSONVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <HandyJSON/PublicHeader.h>
+
+

Pods/HandyJSON/Source/HelpingMapper.swift

@@ -0,0 +1,219 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//  Created by zhouzhuo on 9/20/16.
+//
+
+import Foundation
+
+public typealias CustomMappingKeyValueTuple = (Int, MappingPropertyHandler)
+
+struct MappingPath {
+    var segments: [String]
+
+    static func buildFrom(rawPath: String) -> MappingPath {
+        let regex = try! NSRegularExpression(pattern: "(?<![\\\\])\\.")
+        let nsString = rawPath as NSString
+        let results = regex.matches(in: rawPath, range: NSRange(location: 0, length: nsString.length))
+        var splitPoints = results.map { $0.range.location }
+
+        var curPos = 0
+        var pathArr = [String]()
+        splitPoints.append(nsString.length)
+        splitPoints.forEach({ (point) in
+            let start = rawPath.index(rawPath.startIndex, offsetBy: curPos)
+            let end = rawPath.index(rawPath.startIndex, offsetBy: point)
+            let subPath = String(rawPath[start ..< end]).replacingOccurrences(of: "\\.", with: ".")
+            if !subPath.isEmpty {
+                pathArr.append(subPath)
+            }
+            curPos = point + 1
+        })
+        return MappingPath(segments: pathArr)
+    }
+}
+
+extension Dictionary where Key == String, Value: Any {
+
+    func findValueBy(path: MappingPath) -> Any? {
+        var currentDict: [String: Any]? = self
+        var lastValue: Any?
+        path.segments.forEach { (segment) in
+            lastValue = currentDict?[segment]
+            currentDict = currentDict?[segment] as? [String: Any]
+        }
+        return lastValue
+    }
+}
+
+public class MappingPropertyHandler {
+    var mappingPaths: [MappingPath]?
+    var assignmentClosure: ((Any?) -> (Any?))?
+    var takeValueClosure: ((Any?) -> (Any?))?
+    
+    public init(rawPaths: [String]?, assignmentClosure: ((Any?) -> (Any?))?, takeValueClosure: ((Any?) -> (Any?))?) {
+        let mappingPaths = rawPaths?.map({ (rawPath) -> MappingPath in
+            if HandyJSONConfiguration.deserializeOptions.contains(.caseInsensitive) {
+                return MappingPath.buildFrom(rawPath: rawPath.lowercased())
+            }
+            return MappingPath.buildFrom(rawPath: rawPath)
+        }).filter({ (mappingPath) -> Bool in
+            return mappingPath.segments.count > 0
+        })
+        if let count = mappingPaths?.count, count > 0 {
+            self.mappingPaths = mappingPaths
+        }
+        self.assignmentClosure = assignmentClosure
+        self.takeValueClosure = takeValueClosure
+    }
+}
+
+public class HelpingMapper {
+    
+    private var mappingHandlers = [Int: MappingPropertyHandler]()
+    private var excludeProperties = [Int]()
+    
+    internal func getMappingHandler(key: Int) -> MappingPropertyHandler? {
+        return self.mappingHandlers[key]
+    }
+    
+    internal func propertyExcluded(key: Int) -> Bool {
+        return self.excludeProperties.contains(key)
+    }
+    
+    public func specify<T>(property: inout T, name: String) {
+        self.specify(property: &property, name: name, converter: nil)
+    }
+    
+    public func specify<T>(property: inout T, converter: @escaping (String) -> T) {
+        self.specify(property: &property, name: nil, converter: converter)
+    }
+    
+    public func specify<T>(property: inout T, name: String?, converter: ((String) -> T)?) {
+        let pointer = withUnsafePointer(to: &property, { return $0 })
+        let key = Int(bitPattern: pointer)
+        let names = (name == nil ? nil : [name!])
+        
+        if let _converter = converter {
+            let assignmentClosure = { (jsonValue: Any?) -> Any? in
+                if let _value = jsonValue{
+                    if let object = _value as? NSObject {
+                        if let str = String.transform(from: object){
+                            return _converter(str)
+                        }
+                    }
+                }
+                return nil
+            }
+            self.mappingHandlers[key] = MappingPropertyHandler(rawPaths: names, assignmentClosure: assignmentClosure, takeValueClosure: nil)
+        } else {
+            self.mappingHandlers[key] = MappingPropertyHandler(rawPaths: names, assignmentClosure: nil, takeValueClosure: nil)
+        }
+    }
+    
+    public func exclude<T>(property: inout T) {
+        self._exclude(property: &property)
+    }
+    
+    fileprivate func addCustomMapping(key: Int, mappingInfo: MappingPropertyHandler) {
+        self.mappingHandlers[key] = mappingInfo
+    }
+    
+    fileprivate func _exclude<T>(property: inout T) {
+        let pointer = withUnsafePointer(to: &property, { return $0 })
+        self.excludeProperties.append(Int(bitPattern: pointer))
+    }
+}
+
+infix operator <-- : LogicalConjunctionPrecedence
+
+public func <-- <T>(property: inout T, name: String) -> CustomMappingKeyValueTuple {
+    return property <-- [name]
+}
+
+public func <-- <T>(property: inout T, names: [String]) -> CustomMappingKeyValueTuple {
+    let pointer = withUnsafePointer(to: &property, { return $0 })
+    let key = Int(bitPattern: pointer)
+    return (key, MappingPropertyHandler(rawPaths: names, assignmentClosure: nil, takeValueClosure: nil))
+}
+
+// MARK: non-optional properties
+public func <-- <Transform: TransformType>(property: inout Transform.Object, transformer: Transform) -> CustomMappingKeyValueTuple {
+    return property <-- (nil, transformer)
+}
+
+public func <-- <Transform: TransformType>(property: inout Transform.Object, transformer: (String?, Transform?)) -> CustomMappingKeyValueTuple {
+    let names = (transformer.0 == nil ? [] : [transformer.0!])
+    return property <-- (names, transformer.1)
+}
+
+public func <-- <Transform: TransformType>(property: inout Transform.Object, transformer: ([String], Transform?)) -> CustomMappingKeyValueTuple {
+    let pointer = withUnsafePointer(to: &property, { return $0 })
+    let key = Int(bitPattern: pointer)
+    let assignmentClosure = { (jsonValue: Any?) -> Transform.Object? in
+        return transformer.1?.transformFromJSON(jsonValue)
+    }
+    let takeValueClosure = { (objectValue: Any?) -> Any? in
+        if let _value = objectValue as? Transform.Object {
+            return transformer.1?.transformToJSON(_value) as Any
+        }
+        return nil
+    }
+    return (key, MappingPropertyHandler(rawPaths: transformer.0, assignmentClosure: assignmentClosure, takeValueClosure: takeValueClosure))
+}
+
+// MARK: optional properties
+public func <-- <Transform: TransformType>(property: inout Transform.Object?, transformer: Transform) -> CustomMappingKeyValueTuple {
+    return property <-- (nil, transformer)
+}
+
+public func <-- <Transform: TransformType>(property: inout Transform.Object?, transformer: (String?, Transform?)) -> CustomMappingKeyValueTuple {
+    let names = (transformer.0 == nil ? [] : [transformer.0!])
+    return property <-- (names, transformer.1)
+}
+
+public func <-- <Transform: TransformType>(property: inout Transform.Object?, transformer: ([String], Transform?)) -> CustomMappingKeyValueTuple {
+    let pointer = withUnsafePointer(to: &property, { return $0 })
+    let key = Int(bitPattern: pointer)
+    let assignmentClosure = { (jsonValue: Any?) -> Any? in
+        return transformer.1?.transformFromJSON(jsonValue)
+    }
+    let takeValueClosure = { (objectValue: Any?) -> Any? in
+        if let _value = objectValue as? Transform.Object {
+            return transformer.1?.transformToJSON(_value) as Any
+        }
+        return nil
+    }
+    return (key, MappingPropertyHandler(rawPaths: transformer.0, assignmentClosure: assignmentClosure, takeValueClosure: takeValueClosure))
+}
+
+infix operator <<< : AssignmentPrecedence
+
+public func <<< (mapper: HelpingMapper, mapping: CustomMappingKeyValueTuple) {
+    mapper.addCustomMapping(key: mapping.0, mappingInfo: mapping.1)
+}
+
+public func <<< (mapper: HelpingMapper, mappings: [CustomMappingKeyValueTuple]) {
+    mappings.forEach { (mapping) in
+        mapper.addCustomMapping(key: mapping.0, mappingInfo: mapping.1)
+    }
+}
+
+infix operator >>> : AssignmentPrecedence
+
+public func >>> <T> (mapper: HelpingMapper, property: inout T) {
+    mapper._exclude(property: &property)
+}

Pods/HandyJSON/Source/HexColorTransform.swift

@@ -0,0 +1,115 @@
+//
+//  HexColorTransform.swift
+//  ObjectMapper
+//
+//  Created by Vitaliy Kuzmenko on 10/10/16.
+//  Copyright © 2016 hearst. All rights reserved.
+//
+
+#if os(iOS) || os(tvOS) || os(watchOS)
+import UIKit
+#else
+import Cocoa
+#endif
+
+open class HexColorTransform: TransformType {
+
+	#if os(iOS) || os(tvOS) || os(watchOS)
+	public typealias Object = UIColor
+	#else
+	public typealias Object = NSColor
+	#endif
+
+	public typealias JSON = String
+
+	var prefix: Bool = false
+
+	var alpha: Bool = false
+
+	public init(prefixToJSON: Bool = false, alphaToJSON: Bool = false) {
+		alpha = alphaToJSON
+		prefix = prefixToJSON
+	}
+
+	open func transformFromJSON(_ value: Any?) -> Object? {
+		if let rgba = value as? String {
+			if rgba.hasPrefix("#") {
+				let index = rgba.index(rgba.startIndex, offsetBy: 1)
+				let hex = String(rgba[index...])
+				return getColor(hex: hex)
+			} else {
+				return getColor(hex: rgba)
+			}
+		}
+		return nil
+	}
+
+	open func transformToJSON(_ value: Object?) -> JSON? {
+		if let value = value {
+			return hexString(color: value)
+		}
+		return nil
+	}
+
+	fileprivate func hexString(color: Object) -> String {
+		let comps = color.cgColor.components!
+		let r = Int(comps[0] * 255)
+		let g = Int(comps[1] * 255)
+		let b = Int(comps[2] * 255)
+		let a = Int(comps[3] * 255)
+		var hexString: String = ""
+		if prefix {
+			hexString = "#"
+		}
+		hexString += String(format: "%02X%02X%02X", r, g, b)
+
+		if alpha {
+			hexString += String(format: "%02X", a)
+		}
+		return hexString
+	}
+
+	fileprivate func getColor(hex: String) -> Object? {
+		var red: CGFloat   = 0.0
+		var green: CGFloat = 0.0
+		var blue: CGFloat  = 0.0
+		var alpha: CGFloat = 1.0
+
+		let scanner = Scanner(string: hex)
+		var hexValue: CUnsignedLongLong = 0
+		if scanner.scanHexInt64(&hexValue) {
+			switch (hex.count) {
+			case 3:
+				red   = CGFloat((hexValue & 0xF00) >> 8)       / 15.0
+				green = CGFloat((hexValue & 0x0F0) >> 4)       / 15.0
+				blue  = CGFloat(hexValue & 0x00F)              / 15.0
+			case 4:
+				red   = CGFloat((hexValue & 0xF000) >> 12)     / 15.0
+				green = CGFloat((hexValue & 0x0F00) >> 8)      / 15.0
+				blue  = CGFloat((hexValue & 0x00F0) >> 4)      / 15.0
+				alpha = CGFloat(hexValue & 0x000F)             / 15.0
+			case 6:
+				red   = CGFloat((hexValue & 0xFF0000) >> 16)   / 255.0
+				green = CGFloat((hexValue & 0x00FF00) >> 8)    / 255.0
+				blue  = CGFloat(hexValue & 0x0000FF)           / 255.0
+			case 8:
+				red   = CGFloat((hexValue & 0xFF000000) >> 24) / 255.0
+				green = CGFloat((hexValue & 0x00FF0000) >> 16) / 255.0
+				blue  = CGFloat((hexValue & 0x0000FF00) >> 8)  / 255.0
+				alpha = CGFloat(hexValue & 0x000000FF)         / 255.0
+			default:
+				// Invalid RGB string, number of characters after '#' should be either 3, 4, 6 or 8
+				return nil
+			}
+		} else {
+			// "Scan hex error
+			return nil
+		}
+		#if os(iOS) || os(tvOS) || os(watchOS)
+			return UIColor(red: red, green: green, blue: blue, alpha: alpha)
+		#else
+			return NSColor(calibratedRed: red, green: green, blue: blue, alpha: alpha)
+		#endif
+	}
+}
+

Pods/HandyJSON/Source/ISO8601DateTransform.swift

@@ -0,0 +1,41 @@
+//
+//  ISO8601DateTransform.swift
+//  ObjectMapper
+//
+//  Created by Jean-Pierre Mouilleseaux on 21 Nov 2014.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class ISO8601DateTransform: DateFormatterTransform {
+
+	public init() {
+		let formatter = DateFormatter()
+		formatter.locale = Locale(identifier: "en_US_POSIX")
+		formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
+
+		super.init(dateFormatter: formatter)
+	}
+
+}

Pods/HandyJSON/Source/Logger.swift

@@ -0,0 +1,43 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Logger.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 08/01/2017.
+//
+
+struct InternalLogger {
+
+    static func logError(_ items: Any..., separator: String = " ", terminator: String = "\n") {
+        if HandyJSONConfiguration.debugMode.rawValue <= DebugMode.error.rawValue {
+            print(items, separator: separator, terminator: terminator)
+        }
+    }
+
+    static func logDebug(_ items: Any..., separator: String = " ", terminator: String = "\n") {
+        if HandyJSONConfiguration.debugMode.rawValue <= DebugMode.debug.rawValue {
+            print(items, separator: separator, terminator: terminator)
+        }
+    }
+
+    static func logVerbose(_ items: Any..., separator: String = " ", terminator: String = "\n") {
+        if HandyJSONConfiguration.debugMode.rawValue <= DebugMode.verbose.rawValue {
+            print(items, separator: separator, terminator: terminator)
+        }
+    }
+}

Pods/HandyJSON/Source/MangledName.swift

@@ -0,0 +1,15 @@
+//
+//  MangledName.swift
+//  HandyJSON
+//
+//  Created by chantu on 2019/2/2.
+//  Copyright © 2019 aliyun. All rights reserved.
+//
+
+import Foundation
+
+ // mangled name might contain 0 but it is not the end, do not just use strlen
+func getMangledTypeNameSize(_ mangledName: UnsafePointer<UInt8>) -> Int {
+    // TODO: should find the actually size 
+    return 256
+}

Pods/HandyJSON/Source/Measuable.swift

@@ -0,0 +1,95 @@
+//
+//  Measuable.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 15/07/2017.
+//  Copyright © 2017 aliyun. All rights reserved.
+//
+
+import Foundation
+
+typealias Byte = Int8
+
+public protocol _Measurable {}
+
+extension _Measurable {
+
+    // locate the head of a struct type object in memory
+    mutating func headPointerOfStruct() -> UnsafeMutablePointer<Byte> {
+
+        return withUnsafeMutablePointer(to: &self) {
+            return UnsafeMutableRawPointer($0).bindMemory(to: Byte.self, capacity: MemoryLayout<Self>.stride)
+        }
+    }
+
+    // locating the head of a class type object in memory
+    mutating func headPointerOfClass() -> UnsafeMutablePointer<Byte> {
+
+        let opaquePointer = Unmanaged.passUnretained(self as AnyObject).toOpaque()
+        let mutableTypedPointer = opaquePointer.bindMemory(to: Byte.self, capacity: MemoryLayout<Self>.stride)
+        return UnsafeMutablePointer<Byte>(mutableTypedPointer)
+    }
+
+    // locating the head of an object
+    mutating func headPointer() -> UnsafeMutablePointer<Byte> {
+        if Self.self is AnyClass {
+            return self.headPointerOfClass()
+        } else {
+            return self.headPointerOfStruct()
+        }
+    }
+
+    func isNSObjectType() -> Bool {
+        return (type(of: self) as? NSObject.Type) != nil
+    }
+
+    func getBridgedPropertyList() -> Set<String> {
+        if let anyClass = type(of: self) as? AnyClass {
+            return _getBridgedPropertyList(anyClass: anyClass)
+        }
+        return []
+    }
+
+    func _getBridgedPropertyList(anyClass: AnyClass) -> Set<String> {
+        if !(anyClass is HandyJSON.Type) {
+            return []
+        }
+        var propertyList = Set<String>()
+        if let superClass = class_getSuperclass(anyClass), superClass != NSObject.self {
+            propertyList = propertyList.union(_getBridgedPropertyList(anyClass: superClass))
+        }
+        let count = UnsafeMutablePointer<UInt32>.allocate(capacity: 1)
+        if let props = class_copyPropertyList(anyClass, count) {
+            for i in 0 ..< count.pointee {
+                let name = String(cString: property_getName(props.advanced(by: Int(i)).pointee))
+                propertyList.insert(name)
+            }
+            free(props)
+        }
+        #if swift(>=4.1)
+        count.deallocate()
+        #else
+        count.deallocate(capacity: 1)
+        #endif
+        return propertyList
+    }
+
+    // memory size occupy by self object
+    static func size() -> Int {
+        return MemoryLayout<Self>.size
+    }
+
+    // align
+    static func align() -> Int {
+        return MemoryLayout<Self>.alignment
+    }
+
+    // Returns the offset to the next integer that is greater than
+    // or equal to Value and is a multiple of Align. Align must be
+    // non-zero.
+    static func offsetToAlignment(value: Int, align: Int) -> Int {
+        let m = value % align
+        return m == 0 ? 0 : (align - m)
+    }
+}
+

Pods/HandyJSON/Source/Metadata.swift

@@ -0,0 +1,332 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Created by zhouzhuo on 07/01/2017.
+//
+
+struct _class_rw_t {
+    var flags: Int32
+    var version: Int32
+    var ro: UInt
+    // other fields we don't care
+
+    // reference: include/swift/Remote/MetadataReader.h/readObjcRODataPtr
+    func class_ro_t() -> UnsafePointer<_class_ro_t>? {
+        var addr: UInt = self.ro
+        if (self.ro & UInt(1)) != 0 {
+            if let ptr = UnsafePointer<UInt>(bitPattern: self.ro ^ 1) {
+                addr = ptr.pointee
+            }
+        }
+        return UnsafePointer<_class_ro_t>(bitPattern: addr)
+    }
+}
+
+struct _class_ro_t {
+    var flags: Int32
+    var instanceStart: Int32
+    var instanceSize: Int32
+    // other fields we don't care
+}
+
+// MARK: MetadataType
+protocol MetadataType : PointerType {
+    static var kind: Metadata.Kind? { get }
+}
+
+extension MetadataType {
+
+    var kind: Metadata.Kind {
+        return Metadata.Kind(flag: UnsafePointer<Int>(pointer).pointee)
+    }
+
+    init?(anyType: Any.Type) {
+        self.init(pointer: unsafeBitCast(anyType, to: UnsafePointer<Int>.self))
+        if let kind = type(of: self).kind, kind != self.kind {
+            return nil
+        }
+    }
+}
+
+// MARK: Metadata
+struct Metadata : MetadataType {
+    var pointer: UnsafePointer<Int>
+
+    init(type: Any.Type) {
+        self.init(pointer: unsafeBitCast(type, to: UnsafePointer<Int>.self))
+    }
+}
+
+struct _Metadata {}
+
+var is64BitPlatform: Bool {
+    return MemoryLayout<Int>.size == MemoryLayout<Int64>.size
+}
+
+// MARK: Metadata + Kind
+// include/swift/ABI/MetadataKind.def
+let MetadataKindIsNonHeap = 0x200
+let MetadataKindIsRuntimePrivate = 0x100
+let MetadataKindIsNonType = 0x400
+extension Metadata {
+    static let kind: Kind? = nil
+
+    enum Kind {
+        case `struct`
+        case `enum`
+        case optional
+        case opaque
+        case foreignClass
+        case tuple
+        case function
+        case existential
+        case metatype
+        case objCClassWrapper
+        case existentialMetatype
+        case heapLocalVariable
+        case heapGenericLocalVariable
+        case errorObject
+        case `class` // The kind only valid for non-class metadata
+        init(flag: Int) {
+            switch flag {
+            case (0 | MetadataKindIsNonHeap): self = .struct
+            case (1 | MetadataKindIsNonHeap): self = .enum
+            case (2 | MetadataKindIsNonHeap): self = .optional
+            case (3 | MetadataKindIsNonHeap): self = .foreignClass
+            case (0 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .opaque
+            case (1 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .tuple
+            case (2 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .function
+            case (3 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .existential
+            case (4 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .metatype
+            case (5 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .objCClassWrapper
+            case (6 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap): self = .existentialMetatype
+            case (0 | MetadataKindIsNonType): self = .heapLocalVariable
+            case (0 | MetadataKindIsNonType | MetadataKindIsRuntimePrivate): self = .heapGenericLocalVariable
+            case (1 | MetadataKindIsNonType | MetadataKindIsRuntimePrivate): self = .errorObject
+            default: self = .class
+            }
+        }
+    }
+}
+
+// MARK: Metadata + Class
+extension Metadata {
+    struct Class : ContextDescriptorType {
+
+        static let kind: Kind? = .class
+        var pointer: UnsafePointer<_Metadata._Class>
+
+        var isSwiftClass: Bool {
+            get {
+                // see include/swift/Runtime/Config.h macro SWIFT_CLASS_IS_SWIFT_MASK
+                // it can be 1 or 2 depending on environment
+                let lowbit = self.pointer.pointee.rodataPointer & 3
+                return lowbit != 0
+            }
+        }
+
+        var contextDescriptorOffsetLocation: Int {
+            return is64BitPlatform ? 8 : 11
+        }
+
+        var superclass: Class? {
+            guard let superclass = pointer.pointee.superclass else {
+                return nil
+            }
+
+            // If the superclass doesn't conform to handyjson/handyjsonenum protocol,
+            // we should ignore the properties inside
+            if !(superclass is HandyJSON.Type) && !(superclass is HandyJSONEnum.Type) {
+                return nil
+            }
+
+            // ignore objc-runtime layer
+            guard let metaclass = Metadata.Class(anyType: superclass) else {
+                return nil
+            }
+
+            return metaclass
+        }
+
+        var vTableSize: Int {
+            // memory size after ivar destroyer
+            return Int(pointer.pointee.classObjectSize - pointer.pointee.classObjectAddressPoint) - (contextDescriptorOffsetLocation + 2) * MemoryLayout<Int>.size
+        }
+
+        // reference: https://github.com/apple/swift/blob/master/docs/ABI/TypeMetadata.rst#generic-argument-vector
+        var genericArgumentVector: UnsafeRawPointer? {
+            let pointer = UnsafePointer<Int>(self.pointer)
+            var superVTableSize = 0
+            if let _superclass = self.superclass {
+                superVTableSize = _superclass.vTableSize / MemoryLayout<Int>.size
+            }
+            let base = pointer.advanced(by: contextDescriptorOffsetLocation + 2 + superVTableSize)
+            if base.pointee == 0 {
+                return nil
+            }
+            return UnsafeRawPointer(base)
+        }
+
+        func _propertyDescriptionsAndStartPoint() -> ([Property.Description], Int32?)? {
+            let instanceStart = pointer.pointee.class_rw_t()?.pointee.class_ro_t()?.pointee.instanceStart
+            var result: [Property.Description] = []
+            if let fieldOffsets = self.fieldOffsets, let fieldRecords = self.reflectionFieldDescriptor?.fieldRecords {
+                class NameAndType {
+                    var name: String?
+                    var type: Any.Type?
+                }
+                
+                for i in 0..<self.numberOfFields {
+                    let name = fieldRecords[i].fieldName
+                    if let cMangledTypeName = fieldRecords[i].mangledTypeName,
+                        let fieldType = _getTypeByMangledNameInContext(cMangledTypeName, getMangledTypeNameSize(cMangledTypeName), genericContext: self.contextDescriptorPointer, genericArguments: self.genericArgumentVector) {
+
+                        result.append(Property.Description(key: name, type: fieldType, offset: fieldOffsets[i]))
+                    }
+                }
+            }
+
+            if let superclass = superclass,
+                String(describing: unsafeBitCast(superclass.pointer, to: Any.Type.self)) != "SwiftObject",  // ignore the root swift object
+                let superclassProperties = superclass._propertyDescriptionsAndStartPoint(),
+                superclassProperties.0.count > 0 {
+
+                return (superclassProperties.0 + result, superclassProperties.1)
+            }
+            return (result, instanceStart)
+        }
+
+        func propertyDescriptions() -> [Property.Description]? {
+            let propsAndStp = _propertyDescriptionsAndStartPoint()
+            if let firstInstanceStart = propsAndStp?.1,
+                let firstProperty = propsAndStp?.0.first?.offset {
+                    return propsAndStp?.0.map({ (propertyDesc) -> Property.Description in
+                        let offset = propertyDesc.offset - firstProperty + Int(firstInstanceStart)
+                        return Property.Description(key: propertyDesc.key, type: propertyDesc.type, offset: offset)
+                    })
+            } else {
+                return propsAndStp?.0
+            }
+        }
+    }
+}
+
+extension _Metadata {
+    struct _Class {
+        var kind: Int
+        var superclass: Any.Type?
+        var reserveword1: Int
+        var reserveword2: Int
+        var rodataPointer: UInt
+        var classFlags: UInt32
+        var instanceAddressPoint: UInt32
+        var instanceSize: UInt32
+        var instanceAlignmentMask: UInt16
+        var runtimeReservedField: UInt16
+        var classObjectSize: UInt32
+        var classObjectAddressPoint: UInt32
+        var nominalTypeDescriptor: Int
+        var ivarDestroyer: Int
+        // other fields we don't care
+
+        func class_rw_t() -> UnsafePointer<_class_rw_t>? {
+            if MemoryLayout<Int>.size == MemoryLayout<Int64>.size {
+                let fast_data_mask: UInt64 = 0x00007ffffffffff8
+                let databits_t: UInt64 = UInt64(self.rodataPointer)
+                return UnsafePointer<_class_rw_t>(bitPattern: UInt(databits_t & fast_data_mask))
+            } else {
+                return UnsafePointer<_class_rw_t>(bitPattern: self.rodataPointer & 0xfffffffc)
+            }
+        }
+    }
+}
+
+// MARK: Metadata + Struct
+extension Metadata {
+    struct Struct : ContextDescriptorType {
+        static let kind: Kind? = .struct
+        var pointer: UnsafePointer<_Metadata._Struct>
+        var contextDescriptorOffsetLocation: Int {
+            return 1
+        }
+
+        var genericArgumentOffsetLocation: Int {
+            return 2
+        }
+
+        var genericArgumentVector: UnsafeRawPointer? {
+            let pointer = UnsafePointer<Int>(self.pointer)
+            let base = pointer.advanced(by: genericArgumentOffsetLocation)
+            if base.pointee == 0 {
+                return nil
+            }
+            return UnsafeRawPointer(base)
+        }
+
+        func propertyDescriptions() -> [Property.Description]? {
+            guard let fieldOffsets = self.fieldOffsets, let fieldRecords = self.reflectionFieldDescriptor?.fieldRecords else {
+                return []
+            }
+            var result: [Property.Description] = []
+            class NameAndType {
+                var name: String?
+                var type: Any.Type?
+            }
+            for i in 0..<self.numberOfFields {
+                let name = fieldRecords[i].fieldName
+                if let cMangledTypeName = fieldRecords[i].mangledTypeName,
+                    let fieldType = _getTypeByMangledNameInContext(cMangledTypeName, getMangledTypeNameSize(cMangledTypeName), genericContext: self.contextDescriptorPointer, genericArguments: self.genericArgumentVector) {
+
+                    result.append(Property.Description(key: name, type: fieldType, offset: fieldOffsets[i]))
+                }
+            }
+            return result
+        }
+    }
+}
+
+extension _Metadata {
+    struct _Struct {
+        var kind: Int
+        var contextDescriptorOffset: Int
+        var parent: Metadata?
+    }
+}
+
+// MARK: Metadata + ObjcClassWrapper
+extension Metadata {
+    struct ObjcClassWrapper: ContextDescriptorType {
+        static let kind: Kind? = .objCClassWrapper
+        var pointer: UnsafePointer<_Metadata._ObjcClassWrapper>
+        var contextDescriptorOffsetLocation: Int {
+            return is64BitPlatform ? 8 : 11
+        }
+
+        var targetType: Any.Type? {
+            get {
+                return pointer.pointee.targetType
+            }
+        }
+    }
+}
+
+extension _Metadata {
+    struct _ObjcClassWrapper {
+        var kind: Int
+        var targetType: Any.Type?
+    }
+}

Pods/HandyJSON/Source/NSDecimalNumberTransform.swift

@@ -0,0 +1,51 @@
+//
+//  TransformOf.swift
+//  ObjectMapper
+//
+//  Created by Tristan Himmelman on 8/22/16.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class NSDecimalNumberTransform: TransformType {
+    public typealias Object = NSDecimalNumber
+    public typealias JSON = String
+
+    public init() {}
+
+    open func transformFromJSON(_ value: Any?) -> NSDecimalNumber? {
+        if let string = value as? String {
+            return NSDecimalNumber(string: string)
+        }
+        if let double = value as? Double {
+            return NSDecimalNumber(value: double)
+        }
+        return nil
+    }
+
+    open func transformToJSON(_ value: NSDecimalNumber?) -> String? {
+        guard let value = value else { return nil }
+        return value.description
+    }
+}

Pods/HandyJSON/Source/OtherExtension.swift

@@ -0,0 +1,76 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  OtherExtension.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 08/01/2017.
+//
+
+protocol UTF8Initializable {
+    init?(validatingUTF8: UnsafePointer<CChar>)
+}
+
+extension String : UTF8Initializable {}
+
+extension Array where Element : UTF8Initializable {
+
+    init(utf8Strings: UnsafePointer<CChar>) {
+        var strings = [Element]()
+        var pointer = utf8Strings
+        while let string = Element(validatingUTF8: pointer) {
+            strings.append(string)
+            while pointer.pointee != 0 {
+                pointer.advance()
+            }
+            pointer.advance()
+            guard pointer.pointee != 0 else {
+                break
+            }
+        }
+        self = strings
+    }
+}
+
+extension Strideable {
+    mutating func advance() {
+        self = advanced(by: 1)
+    }
+}
+
+extension UnsafePointer {
+
+    init<T>(_ pointer: UnsafePointer<T>) {
+        self = UnsafeRawPointer(pointer).assumingMemoryBound(to: Pointee.self)
+    }
+}
+
+func relativePointer<T, U, V>(base: UnsafePointer<T>, offset: U) -> UnsafePointer<V> where U : FixedWidthInteger {
+    return UnsafeRawPointer(base).advanced(by: Int(integer: offset)).assumingMemoryBound(to: V.self)
+}
+
+extension Int {
+    fileprivate init<T : FixedWidthInteger>(integer: T) {
+        switch integer {
+        case let value as Int: self = value
+        case let value as Int32: self = Int(value)
+        case let value as Int16: self = Int(value)
+        case let value as Int8: self = Int(value)
+        default: self = 0
+        }
+    }
+}

Pods/HandyJSON/Source/PointerType.swift

@@ -0,0 +1,37 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Created by zhouzhuo on 07/01/2017.
+//
+
+protocol PointerType : Equatable {
+    associatedtype Pointee
+    var pointer: UnsafePointer<Pointee> { get set }
+}
+
+extension PointerType {
+    init<T>(pointer: UnsafePointer<T>) {
+        func cast<T, U>(_ value: T) -> U {
+            return unsafeBitCast(value, to: U.self)
+        }
+        self = cast(UnsafePointer<Pointee>(pointer))
+    }
+}
+
+func == <T: PointerType>(lhs: T, rhs: T) -> Bool {
+    return lhs.pointer == rhs.pointer
+}

Pods/HandyJSON/Source/Properties.swift

@@ -0,0 +1,68 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Created by zhouzhuo on 07/01/2017.
+//
+
+
+/// An instance property
+struct Property {
+    let key: String
+    let value: Any
+
+    /// An instance property description
+    struct Description {
+        public let key: String
+        public let type: Any.Type
+        public let offset: Int
+        public func write(_ value: Any, to storage: UnsafeMutableRawPointer) {
+            return extensions(of: type).write(value, to: storage.advanced(by: offset))
+        }
+    }
+}
+
+/// Retrieve properties for `instance`
+func getProperties(forInstance instance: Any) -> [Property]? {
+    if let props = getProperties(forType: type(of: instance)) {
+        var copy = extensions(of: instance)
+        let storage = copy.storage()
+        return props.map {
+            nextProperty(description: $0, storage: storage)
+        }
+    }
+    return nil
+}
+
+private func nextProperty(description: Property.Description, storage: UnsafeRawPointer) -> Property {
+    return Property(
+        key: description.key,
+        value: extensions(of: description.type).value(from: storage.advanced(by: description.offset))
+    )
+}
+
+/// Retrieve property descriptions for `type`
+func getProperties(forType type: Any.Type) -> [Property.Description]? {
+    if let structDescriptor = Metadata.Struct(anyType: type) {
+        return structDescriptor.propertyDescriptions()
+    } else if let classDescriptor = Metadata.Class(anyType: type) {
+        return classDescriptor.propertyDescriptions()
+    } else if let objcClassDescriptor = Metadata.ObjcClassWrapper(anyType: type),
+        let targetType = objcClassDescriptor.targetType {
+        return getProperties(forType: targetType)
+    }
+    return nil
+}

Pods/HandyJSON/Source/PropertyInfo.swift

@@ -0,0 +1,29 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  PropertyInfo.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 20/08/2017.
+//
+
+struct PropertyInfo {
+    let key: String
+    let type: Any.Type
+    let address: UnsafeMutableRawPointer
+    let bridged: Bool
+}

Pods/HandyJSON/Source/ReflectionHelper.swift

@@ -0,0 +1,42 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  Helper.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 07/01/2017.
+//
+
+struct ReflectionHelper {
+
+    static func mutableStorage<T>(instance: inout T) -> UnsafeMutableRawPointer {
+        return UnsafeMutableRawPointer(mutating: storage(instance: &instance))
+    }
+
+    static func storage<T>(instance: inout T) -> UnsafeRawPointer {
+        if type(of: instance) is AnyClass {
+            let opaquePointer = Unmanaged.passUnretained(instance as AnyObject).toOpaque()
+            return UnsafeRawPointer(opaquePointer)
+        } else {
+            return withUnsafePointer(to: &instance) { pointer in
+                return UnsafeRawPointer(pointer)
+            }
+        }
+    }
+}
+
+

Pods/HandyJSON/Source/Serializer.swift

@@ -0,0 +1,84 @@
+/*
+ * Copyright 1999-2101 Alibaba Group.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+//  JSONSerializer.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 9/30/16.
+//
+
+import Foundation
+
+public extension HandyJSON {
+
+    func toJSON() -> [String: Any]? {
+        if let dict = Self._serializeAny(object: self) as? [String: Any] {
+            return dict
+        }
+        return nil
+    }
+
+    func toJSONString(prettyPrint: Bool = false) -> String? {
+
+        if let anyObject = self.toJSON() {
+            if JSONSerialization.isValidJSONObject(anyObject) {
+                do {
+                    let jsonData: Data
+                    if prettyPrint {
+                        jsonData = try JSONSerialization.data(withJSONObject: anyObject, options: [.prettyPrinted])
+                    } else {
+                        jsonData = try JSONSerialization.data(withJSONObject: anyObject, options: [])
+                    }
+                    return String(data: jsonData, encoding: .utf8)
+                } catch let error {
+                    InternalLogger.logError(error)
+                }
+            } else {
+                InternalLogger.logDebug("\(anyObject)) is not a valid JSON Object")
+            }
+        }
+        return nil
+    }
+}
+
+public extension Collection where Iterator.Element: HandyJSON {
+
+    func toJSON() -> [[String: Any]?] {
+        return self.map{ $0.toJSON() }
+    }
+
+    func toJSONString(prettyPrint: Bool = false) -> String? {
+
+        let anyArray = self.toJSON()
+        if JSONSerialization.isValidJSONObject(anyArray) {
+            do {
+                let jsonData: Data
+                if prettyPrint {
+                    jsonData = try JSONSerialization.data(withJSONObject: anyArray, options: [.prettyPrinted])
+                } else {
+                    jsonData = try JSONSerialization.data(withJSONObject: anyArray, options: [])
+                }
+                return String(data: jsonData, encoding: .utf8)
+            } catch let error {
+                InternalLogger.logError(error)
+            }
+        } else {
+            InternalLogger.logDebug("\(self.toJSON()) is not a valid JSON Object")
+        }
+        return nil
+    }
+}

Pods/HandyJSON/Source/TransformOf.swift

@@ -0,0 +1,48 @@
+//
+//  TransformOf.swift
+//  ObjectMapper
+//
+//  Created by Syo Ikeda on 1/23/15.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+open class TransformOf<ObjectType, JSONType>: TransformType {
+	public typealias Object = ObjectType
+	public typealias JSON = JSONType
+
+	private let fromJSON: (JSONType?) -> ObjectType?
+	private let toJSON: (ObjectType?) -> JSONType?
+
+	public init(fromJSON: @escaping(JSONType?) -> ObjectType?, toJSON: @escaping(ObjectType?) -> JSONType?) {
+		self.fromJSON = fromJSON
+		self.toJSON = toJSON
+	}
+
+	open func transformFromJSON(_ value: Any?) -> ObjectType? {
+		return fromJSON(value as? JSONType)
+	}
+
+	open func transformToJSON(_ value: ObjectType?) -> JSONType? {
+		return toJSON(value)
+	}
+}

Pods/HandyJSON/Source/TransformType.swift

@@ -0,0 +1,35 @@
+//
+//  TransformType.swift
+//  ObjectMapper
+//
+//  Created by Syo Ikeda on 2/4/15.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+public protocol TransformType {
+	associatedtype Object
+	associatedtype JSON
+
+	func transformFromJSON(_ value: Any?) -> Object?
+	func transformToJSON(_ value: Object?) -> JSON?
+}

Pods/HandyJSON/Source/Transformable.swift

@@ -0,0 +1,52 @@
+//
+//  Transformable.swift
+//  HandyJSON
+//
+//  Created by zhouzhuo on 15/07/2017.
+//  Copyright © 2017 aliyun. All rights reserved.
+//
+
+import Foundation
+
+public protocol _Transformable: _Measurable {}
+
+extension _Transformable {
+
+    static func transform(from object: Any) -> Self? {
+        if let typedObject = object as? Self {
+            return typedObject
+        }
+        switch self {
+        case let type as _ExtendCustomBasicType.Type:
+            return type._transform(from: object) as? Self
+        case let type as _BuiltInBridgeType.Type:
+            return type._transform(from: object) as? Self
+        case let type as _BuiltInBasicType.Type:
+            return type._transform(from: object) as? Self
+        case let type as _RawEnumProtocol.Type:
+            return type._transform(from: object) as? Self
+        case let type as _ExtendCustomModelType.Type:
+            return type._transform(from: object) as? Self
+        default:
+            return nil
+        }
+    }
+
+    func plainValue() -> Any? {
+        switch self {
+        case let rawValue as _ExtendCustomBasicType:
+            return rawValue._plainValue()
+        case let rawValue as _BuiltInBridgeType:
+            return rawValue._plainValue()
+        case let rawValue as _BuiltInBasicType:
+            return rawValue._plainValue()
+        case let rawValue as _RawEnumProtocol:
+            return rawValue._plainValue()
+        case let rawValue as _ExtendCustomModelType:
+            return rawValue._plainValue()
+        default:
+            return nil
+        }
+    }
+}
+

Pods/HandyJSON/Source/URLTransform.swift

@@ -0,0 +1,65 @@
+//
+//  URLTransform.swift
+//  ObjectMapper
+//
+//  Created by Tristan Himmelman on 2014-10-27.
+//
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2014-2016 Hearst
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import Foundation
+
+open class URLTransform: TransformType {
+	public typealias Object = URL
+	public typealias JSON = String
+	private let shouldEncodeURLString: Bool
+
+	/**
+	Initializes the URLTransform with an option to encode URL strings before converting them to an NSURL
+	- parameter shouldEncodeUrlString: when true (the default) the string is encoded before passing
+	to `NSURL(string:)`
+	- returns: an initialized transformer
+	*/
+	public init(shouldEncodeURLString: Bool = true) {
+		self.shouldEncodeURLString = shouldEncodeURLString
+	}
+
+	open func transformFromJSON(_ value: Any?) -> URL? {
+		guard let URLString = value as? String else { return nil }
+
+		if !shouldEncodeURLString {
+			return URL(string: URLString)
+		}
+
+		guard let escapedURLString = URLString.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlQueryAllowed) else {
+			return nil
+		}
+		return URL(string: escapedURLString)
+	}
+
+	open func transformToJSON(_ value: URL?) -> String? {
+		if let URL = value {
+			return URL.absoluteString
+		}
+		return nil
+	}
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Categories/IQNSArray+Sort.swift

@@ -0,0 +1,60 @@
+//
+//  IQNSArray+Sort.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+import UIKit
+
+/**
+UIView.subviews sorting category.
+*/
+internal extension Array where Element: UIView {
+    
+    ///--------------
+    /// MARK: Sorting
+    ///--------------
+    
+    /**
+    Returns the array by sorting the UIView's by their tag property.
+    */
+    func sortedArrayByTag() -> [Element] {
+        
+        return sorted(by: { (obj1: Element, obj2: Element) -> Bool in
+            
+            return (obj1.tag < obj2.tag)
+        })
+    }
+    
+    /**
+    Returns the array by sorting the UIView's by their tag property.
+    */
+    func sortedArrayByPosition() -> [Element] {
+        
+        return sorted(by: { (obj1: Element, obj2: Element) -> Bool in
+            if obj1.frame.minY != obj2.frame.minY {
+                return obj1.frame.minY < obj2.frame.minY
+            } else {
+                return obj1.frame.minX < obj2.frame.minX
+            }
+        })
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Categories/IQUIScrollView+Additions.swift

@@ -0,0 +1,129 @@
+//
+//  IQUIScrollView+Additions.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+import UIKit
+
+private var kIQShouldIgnoreScrollingAdjustment      = "kIQShouldIgnoreScrollingAdjustment"
+private var kIQShouldIgnoreContentInsetAdjustment   = "kIQShouldIgnoreContentInsetAdjustment"
+private var kIQShouldRestoreScrollViewContentOffset = "kIQShouldRestoreScrollViewContentOffset"
+
+@objc public extension UIScrollView {
+    
+    /**
+     If YES, then scrollview will ignore scrolling (simply not scroll it) for adjusting textfield position. Default is NO.
+     */
+    @objc var shouldIgnoreScrollingAdjustment: Bool {
+        get {
+            
+            if let aValue = objc_getAssociatedObject(self, &kIQShouldIgnoreScrollingAdjustment) as? Bool {
+                return aValue
+            } else {
+                return false
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQShouldIgnoreScrollingAdjustment, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+
+    /**
+     If YES, then scrollview will ignore content inset adjustment (simply not updating it) when keyboard is shown. Default is NO.
+     */
+    @objc var shouldIgnoreContentInsetAdjustment: Bool {
+        get {
+            
+            if let aValue = objc_getAssociatedObject(self, &kIQShouldIgnoreContentInsetAdjustment) as? Bool {
+                return aValue
+            } else {
+                return false
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQShouldIgnoreContentInsetAdjustment, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+    
+    /**
+     To set customized distance from keyboard for textField/textView. Can't be less than zero
+     */
+    @objc var shouldRestoreScrollViewContentOffset: Bool {
+        get {
+            
+            if let aValue = objc_getAssociatedObject(self, &kIQShouldRestoreScrollViewContentOffset) as? Bool {
+                return aValue
+            } else {
+                return false
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQShouldRestoreScrollViewContentOffset, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+}
+
+internal extension UITableView {
+    
+    func previousIndexPath(of indexPath: IndexPath) -> IndexPath? {
+        var previousRow = indexPath.row - 1
+        var previousSection = indexPath.section
+        
+        //Fixing indexPath
+        if previousRow < 0 {
+            previousSection -= 1
+            
+            if previousSection >= 0 {
+                previousRow = self.numberOfRows(inSection: previousSection) - 1
+            }
+        }
+        
+        if previousRow >= 0 && previousSection >= 0 {
+            return IndexPath(row: previousRow, section: previousSection)
+        } else {
+            return nil
+        }
+    }
+}
+
+internal extension UICollectionView {
+    
+    func previousIndexPath(of indexPath: IndexPath) -> IndexPath? {
+        var previousRow = indexPath.row - 1
+        var previousSection = indexPath.section
+        
+        //Fixing indexPath
+        if previousRow < 0 {
+            previousSection -= 1
+            
+            if previousSection >= 0 {
+                previousRow = self.numberOfItems(inSection: previousSection) - 1
+            }
+        }
+        
+        if previousRow >= 0 && previousSection >= 0 {
+            return IndexPath(item: previousRow, section: previousSection)
+        } else {
+            return nil
+        }
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Categories/IQUITextFieldView+Additions.swift

@@ -0,0 +1,109 @@
+//
+//  IQUITextFieldView+Additions.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+import UIKit
+
+/**
+Uses default keyboard distance for textField.
+*/
+public let kIQUseDefaultKeyboardDistance = CGFloat.greatestFiniteMagnitude
+
+private var kIQKeyboardDistanceFromTextField = "kIQKeyboardDistanceFromTextField"
+private var kIQKeyboardEnableMode = "kIQKeyboardEnableMode"
+private var kIQShouldResignOnTouchOutsideMode = "kIQShouldResignOnTouchOutsideMode"
+private var kIQIgnoreSwitchingByNextPrevious = "kIQIgnoreSwitchingByNextPrevious"
+
+/**
+UIView category for managing UITextField/UITextView
+*/
+@objc public extension UIView {
+
+    /**
+     To set customized distance from keyboard for textField/textView. Can't be less than zero
+     */
+    @objc var keyboardDistanceFromTextField: CGFloat {
+        get {
+            
+            if let aValue = objc_getAssociatedObject(self, &kIQKeyboardDistanceFromTextField) as? CGFloat {
+                return aValue
+            } else {
+                return kIQUseDefaultKeyboardDistance
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQKeyboardDistanceFromTextField, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+    
+    /**
+     If shouldIgnoreSwitchingByNextPrevious is true then library will ignore this textField/textView while moving to other textField/textView using keyboard toolbar next previous buttons. Default is false
+     */
+    @objc var ignoreSwitchingByNextPrevious: Bool {
+        get {
+            
+            if let aValue = objc_getAssociatedObject(self, &kIQIgnoreSwitchingByNextPrevious) as? Bool {
+                return aValue
+            } else {
+                return false
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQIgnoreSwitchingByNextPrevious, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+    
+//    /**
+//     Override Enable/disable managing distance between keyboard and textField behaviour for this particular textField.
+//     */
+    @objc var enableMode: IQEnableMode {
+        get {
+            
+            if let savedMode = objc_getAssociatedObject(self, &kIQKeyboardEnableMode) as? IQEnableMode {
+                return savedMode
+            } else {
+                return .default
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQKeyboardEnableMode, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+    
+    /**
+     Override resigns Keyboard on touching outside of UITextField/View behaviour for this particular textField.
+     */
+    @objc var shouldResignOnTouchOutsideMode: IQEnableMode {
+        get {
+            
+            if let savedMode = objc_getAssociatedObject(self, &kIQShouldResignOnTouchOutsideMode) as? IQEnableMode {
+                return savedMode
+            } else {
+                return .default
+            }
+        }
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQShouldResignOnTouchOutsideMode, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Categories/IQUIView+Hierarchy.swift

@@ -0,0 +1,330 @@
+//
+//  IQUIView+Hierarchy.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+
+/**
+UIView hierarchy category.
+*/
+@objc public extension UIView {
+    
+    ///----------------------
+    /// MARK: viewControllers
+    ///----------------------
+
+    /**
+    Returns the UIViewController object that manages the receiver.
+    */
+    @objc func viewContainingController() -> UIViewController? {
+        
+        var nextResponder: UIResponder? = self
+        
+        repeat {
+            nextResponder = nextResponder?.next
+            
+            if let viewController = nextResponder as? UIViewController {
+                return viewController
+            }
+            
+        } while nextResponder != nil
+        
+        return nil
+    }
+    
+    /**
+    Returns the topMost UIViewController object in hierarchy.
+    */
+    @objc func topMostController() -> UIViewController? {
+        
+        var controllersHierarchy = [UIViewController]()
+
+        if var topController = window?.rootViewController {
+            controllersHierarchy.append(topController)
+
+            while let presented = topController.presentedViewController {
+                
+                topController = presented
+
+                controllersHierarchy.append(presented)
+            }
+            
+            var matchController: UIResponder? = viewContainingController()
+
+            while let mController = matchController as? UIViewController, controllersHierarchy.contains(mController) == false {
+                
+                repeat {
+                    matchController = matchController?.next
+
+                } while matchController != nil && matchController is UIViewController == false
+            }
+            
+            return matchController as? UIViewController
+            
+        } else {
+            return viewContainingController()
+        }
+    }
+    
+    /**
+     Returns the UIViewController object that is actually the parent of this object. Most of the time it's the viewController object which actually contains it, but result may be different if it's viewController is added as childViewController of another viewController.
+     */
+    @objc func parentContainerViewController() -> UIViewController? {
+        
+        var matchController = viewContainingController()
+        var parentContainerViewController: UIViewController?
+
+        if var navController = matchController?.navigationController {
+            
+            while let parentNav = navController.navigationController {
+                navController = parentNav
+            }
+            
+            var parentController: UIViewController = navController
+
+            while let parent = parentController.parent,
+                (parent.isKind(of: UINavigationController.self) == false &&
+                    parent.isKind(of: UITabBarController.self) == false &&
+                    parent.isKind(of: UISplitViewController.self) == false) {
+                        
+                        parentController = parent
+            }
+
+            if navController == parentController {
+                parentContainerViewController = navController.topViewController
+            } else {
+                parentContainerViewController = parentController
+            }
+        } else if let tabController = matchController?.tabBarController {
+            
+            if let navController = tabController.selectedViewController as? UINavigationController {
+                parentContainerViewController = navController.topViewController
+            } else {
+                parentContainerViewController = tabController.selectedViewController
+            }
+        } else {
+            while let parentController = matchController?.parent,
+                (parentController.isKind(of: UINavigationController.self) == false &&
+                    parentController.isKind(of: UITabBarController.self) == false &&
+                    parentController.isKind(of: UISplitViewController.self) == false) {
+                        
+                        matchController = parentController
+            }
+
+            parentContainerViewController = matchController
+        }
+        
+        let finalController = parentContainerViewController?.parentIQContainerViewController() ?? parentContainerViewController
+        
+        return finalController
+
+    }
+
+    ///-----------------------------------
+    /// MARK: Superviews/Subviews/Siglings
+    ///-----------------------------------
+    
+    /**
+    Returns the superView of provided class type.
+
+     
+     @param classType class type of the object which is to be search in above hierarchy and return
+     
+     @param belowView view object in upper hierarchy where method should stop searching and return nil
+*/
+    @objc func superviewOfClassType(_ classType: UIView.Type, belowView: UIView? = nil) -> UIView? {
+
+        var superView = superview
+        
+        while let unwrappedSuperView = superView {
+            
+            if unwrappedSuperView.isKind(of: classType) {
+                
+                //If it's UIScrollView, then validating for special cases
+                if unwrappedSuperView.isKind(of: UIScrollView.self) {
+                    
+                    let classNameString = NSStringFromClass(type(of: unwrappedSuperView.self))
+
+                    //  If it's not UITableViewWrapperView class, this is internal class which is actually manage in UITableview. The speciality of this class is that it's superview is UITableView.
+                    //  If it's not UITableViewCellScrollView class, this is internal class which is actually manage in UITableviewCell. The speciality of this class is that it's superview is UITableViewCell.
+                    //If it's not _UIQueuingScrollView class, actually we validate for _ prefix which usually used by Apple internal classes
+                    if unwrappedSuperView.superview?.isKind(of: UITableView.self) == false &&
+                        unwrappedSuperView.superview?.isKind(of: UITableViewCell.self) == false &&
+                        classNameString.hasPrefix("_") == false {
+                        return superView
+                    }
+                } else {
+                    return superView
+                }
+            } else if unwrappedSuperView == belowView {
+                return nil
+            }
+            
+            superView = unwrappedSuperView.superview
+        }
+        
+        return nil
+    }
+
+    /**
+    Returns all siblings of the receiver which canBecomeFirstResponder.
+    */
+    internal func responderSiblings() -> [UIView] {
+
+        //Array of (UITextField/UITextView's).
+        var tempTextFields = [UIView]()
+
+        //	Getting all siblings
+        if let siblings = superview?.subviews {
+            
+            for textField in siblings {
+                
+                if (textField == self || textField.ignoreSwitchingByNextPrevious == false) && textField.IQcanBecomeFirstResponder() == true {
+                    tempTextFields.append(textField)
+                }
+            }
+        }
+
+        return tempTextFields
+    }
+    
+    /**
+    Returns all deep subViews of the receiver which canBecomeFirstResponder.
+    */
+    internal func deepResponderViews() -> [UIView] {
+        
+        //Array of (UITextField/UITextView's).
+        var textfields = [UIView]()
+        
+        for textField in subviews {
+            
+            if (textField == self || textField.ignoreSwitchingByNextPrevious == false) && textField.IQcanBecomeFirstResponder() == true {
+                textfields.append(textField)
+            }
+            //Sometimes there are hidden or disabled views and textField inside them still recorded, so we added some more validations here (Bug ID: #458)
+            //Uncommented else (Bug ID: #625)
+            else if textField.subviews.count != 0  && isUserInteractionEnabled == true && isHidden == false && alpha != 0.0 {
+                for deepView in textField.deepResponderViews() {
+                    textfields.append(deepView)
+                }
+            }
+        }
+        
+        //subviews are returning in opposite order. Sorting according the frames 'y'.
+        return textfields.sorted(by: { (view1: UIView, view2: UIView) -> Bool in
+            
+            let frame1 = view1.convert(view1.bounds, to: self)
+            let frame2 = view2.convert(view2.bounds, to: self)
+
+            if frame1.minY != frame2.minY {
+                return frame1.minY < frame2.minY
+            } else {
+                return frame1.minX < frame2.minX
+            }
+        })
+    }
+    
+    private func IQcanBecomeFirstResponder() -> Bool {
+        
+        var IQcanBecomeFirstResponder = false
+        
+        if self.conforms(to: UITextInput.self) {
+            //  Setting toolbar to keyboard.
+            if let textView = self as? UITextView {
+                IQcanBecomeFirstResponder = textView.isEditable
+            } else if let textField = self as? UITextField {
+                IQcanBecomeFirstResponder = textField.isEnabled
+            }
+        }
+        
+        if IQcanBecomeFirstResponder == true {
+            IQcanBecomeFirstResponder = isUserInteractionEnabled == true && isHidden == false && alpha != 0.0 && isAlertViewTextField() == false && textFieldSearchBar() == nil
+        }
+
+        return IQcanBecomeFirstResponder
+    }
+
+    ///-------------------------
+    /// MARK: Special TextFields
+    ///-------------------------
+    
+    /**
+     Returns searchBar if receiver object is UISearchBarTextField, otherwise return nil.
+    */
+    internal func textFieldSearchBar() -> UISearchBar? {
+        
+        var responder: UIResponder? = self.next
+        
+        while let bar = responder {
+            
+            if let searchBar = bar as? UISearchBar {
+                return searchBar
+            } else if bar is UIViewController {
+                break
+            }
+            
+            responder = bar.next
+        }
+        
+        return nil
+    }
+    
+    /**
+    Returns YES if the receiver object is UIAlertSheetTextField, otherwise return NO.
+    */
+    internal func isAlertViewTextField() -> Bool {
+        
+        var alertViewController: UIResponder? = viewContainingController()
+        
+        var isAlertViewTextField = false
+        
+        while let controller = alertViewController, isAlertViewTextField == false {
+            
+            if controller.isKind(of: UIAlertController.self) {
+                isAlertViewTextField = true
+                break
+            }
+            
+            alertViewController = controller.next
+        }
+        
+        return isAlertViewTextField
+    }
+    
+    private func depth() -> Int {
+        var depth: Int = 0
+        
+        if let superView = superview {
+            depth = superView.depth()+1
+        }
+        
+        return depth
+    }
+    
+}
+
+extension NSObject {
+    
+    internal func _IQDescription() -> String {
+        return "<\(self) \(Unmanaged.passUnretained(self).toOpaque())>"
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Categories/IQUIViewController+Additions.swift

@@ -0,0 +1,53 @@
+//
+//  IQUIViewController+Additions.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+
+private var kIQLayoutGuideConstraint = "kIQLayoutGuideConstraint"
+
+@objc public extension UIViewController {
+
+    /**
+     This method is provided to override by viewController's if the library lifts a viewController which you doesn't want to lift . This may happen if you have implemented side menu feature in your app and the library try to lift the side menu controller. Overriding this method in side menu class to return correct controller should fix the problem.
+    */
+    func parentIQContainerViewController() -> UIViewController? {
+        return self
+    }
+    
+    /**
+    To set customized distance from keyboard for textField/textView. Can't be less than zero
+     
+     @deprecated    Due to change in core-logic of handling distance between textField and keyboard distance, this layout contraint tweak is no longer needed and things will just work out of the box regardless of constraint pinned with safeArea/layoutGuide/superview
+    */
+    @available(*, deprecated, message: "Due to change in core-logic of handling distance between textField and keyboard distance, this layout contraint tweak is no longer needed and things will just work out of the box regardless of constraint pinned with safeArea/layoutGuide/superview.")
+    @IBOutlet @objc var IQLayoutGuideConstraint: NSLayoutConstraint? {
+        get {
+            
+            return objc_getAssociatedObject(self, &kIQLayoutGuideConstraint) as? NSLayoutConstraint
+        }
+
+        set(newValue) {
+            objc_setAssociatedObject(self, &kIQLayoutGuideConstraint, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Constants/IQKeyboardManagerConstants.swift

@@ -0,0 +1,149 @@
+//
+//  IQKeyboardManagerConstants.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+
+///-----------------------------------
+/// MARK: IQAutoToolbarManageBehaviour
+///-----------------------------------
+
+/**
+`IQAutoToolbarBySubviews`
+Creates Toolbar according to subview's hirarchy of Textfield's in view.
+
+`IQAutoToolbarByTag`
+Creates Toolbar according to tag property of TextField's.
+
+`IQAutoToolbarByPosition`
+Creates Toolbar according to the y,x position of textField in it's superview coordinate.
+*/
+@objc public enum IQAutoToolbarManageBehaviour: Int {
+    case bySubviews
+    case byTag
+    case byPosition
+}
+
+/**
+ `IQPreviousNextDisplayModeDefault`
+ Show NextPrevious when there are more than 1 textField otherwise hide.
+ 
+ `IQPreviousNextDisplayModeAlwaysHide`
+ Do not show NextPrevious buttons in any case.
+ 
+ `IQPreviousNextDisplayModeAlwaysShow`
+ Always show nextPrevious buttons, if there are more than 1 textField then both buttons will be visible but will be shown as disabled.
+ */
+@objc public enum IQPreviousNextDisplayMode: Int {
+    case `default`
+    case alwaysHide
+    case alwaysShow
+}
+
+/**
+ `IQEnableModeDefault`
+ Pick default settings.
+ 
+ `IQEnableModeEnabled`
+ setting is enabled.
+ 
+ `IQEnableModeDisabled`
+ setting is disabled.
+ */
+@objc public enum IQEnableMode: Int {
+    case `default`
+    case enabled
+    case disabled
+}
+
+/*
+ /---------------------------------------------------------------------------------------------------\
+ \---------------------------------------------------------------------------------------------------/
+ |                                   iOS Notification Mechanism                                    |
+ /---------------------------------------------------------------------------------------------------\
+ \---------------------------------------------------------------------------------------------------/
+ 
+ ------------------------------------------------------------
+ When UITextField become first responder
+ ------------------------------------------------------------
+ - UITextFieldTextDidBeginEditingNotification (UITextField)
+ - UIKeyboardWillShowNotification
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ When UITextView become first responder
+ ------------------------------------------------------------
+ - UIKeyboardWillShowNotification
+ - UITextViewTextDidBeginEditingNotification (UITextView)
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ When switching focus from UITextField to another UITextField
+ ------------------------------------------------------------
+ - UITextFieldTextDidEndEditingNotification (UITextField1)
+ - UITextFieldTextDidBeginEditingNotification (UITextField2)
+ - UIKeyboardWillShowNotification
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ When switching focus from UITextView to another UITextView
+ ------------------------------------------------------------
+ - UITextViewTextDidEndEditingNotification: (UITextView1)
+ - UIKeyboardWillShowNotification
+ - UITextViewTextDidBeginEditingNotification: (UITextView2)
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ When switching focus from UITextField to UITextView
+ ------------------------------------------------------------
+ - UITextFieldTextDidEndEditingNotification (UITextField)
+ - UIKeyboardWillShowNotification
+ - UITextViewTextDidBeginEditingNotification (UITextView)
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ When switching focus from UITextView to UITextField
+ ------------------------------------------------------------
+ - UITextViewTextDidEndEditingNotification (UITextView)
+ - UITextFieldTextDidBeginEditingNotification (UITextField)
+ - UIKeyboardWillShowNotification
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ When opening/closing UIKeyboard Predictive bar
+ ------------------------------------------------------------
+ - UIKeyboardWillShowNotification
+ - UIKeyboardDidShowNotification
+ 
+ ------------------------------------------------------------
+ On orientation change
+ ------------------------------------------------------------
+ - UIApplicationWillChangeStatusBarOrientationNotification
+ - UIKeyboardWillHideNotification
+ - UIKeyboardDidHideNotification
+ - UIApplicationDidChangeStatusBarOrientationNotification
+ - UIKeyboardWillShowNotification
+ - UIKeyboardDidShowNotification
+ - UIKeyboardWillShowNotification
+ - UIKeyboardDidShowNotification
+ 
+ */

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/Constants/IQKeyboardManagerConstantsInternal.swift

@@ -0,0 +1,24 @@
+//
+//  IQKeyboardManagerConstantsInternal.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQKeyboardManager.swift

@@ -0,0 +1,2302 @@
+//
+//  IQKeyboardManager.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+import CoreGraphics
+import UIKit
+import QuartzCore
+
+///---------------------
+/// MARK: IQToolbar tags
+///---------------------
+
+/**
+Codeless drop-in universal library allows to prevent issues of keyboard sliding up and cover UITextField/UITextView. Neither need to write any code nor any setup required and much more. A generic version of KeyboardManagement. https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html
+*/
+
+@objc public class IQKeyboardManager: NSObject, UIGestureRecognizerDelegate {
+    
+    /**
+    Default tag for toolbar with Done button   -1002.
+    */
+    private static let  kIQDoneButtonToolbarTag         =   -1002
+    
+    /**
+    Default tag for toolbar with Previous/Next buttons -1005.
+    */
+    private static let  kIQPreviousNextButtonToolbarTag =   -1005
+
+    /**
+     Invalid point value.
+     */
+    private static let  kIQCGPointInvalid = CGPoint.init(x: CGFloat.greatestFiniteMagnitude, y: CGFloat.greatestFiniteMagnitude)
+
+    ///---------------------------
+    ///  MARK: UIKeyboard handling
+    ///---------------------------
+    
+    /**
+    Enable/disable managing distance between keyboard and textField. Default is YES(Enabled when class loads in `+(void)load` method).
+    */
+    @objc public var enable = false {
+        
+        didSet {
+            //If not enable, enable it.
+            if enable == true &&
+                oldValue == false {
+                //If keyboard is currently showing. Sending a fake notification for keyboardWillHide to retain view's original position.
+                if let notification = _kbShowNotification {
+                    keyboardWillShow(notification)
+                }
+                showLog("Enabled")
+            } else if enable == false &&
+                oldValue == true {   //If not disable, desable it.
+                keyboardWillHide(nil)
+                showLog("Disabled")
+            }
+        }
+    }
+    
+    private func privateIsEnabled() -> Bool {
+        
+        var isEnabled = enable
+        
+        let enableMode = _textFieldView?.enableMode
+
+        if enableMode == .enabled {
+            isEnabled = true
+        } else if enableMode == .disabled {
+            isEnabled = false
+        } else {
+            if var textFieldViewController = _textFieldView?.viewContainingController() {
+                
+                //If it is searchBar textField embedded in Navigation Bar
+                if _textFieldView?.textFieldSearchBar() != nil, let navController = textFieldViewController as? UINavigationController, let topController = navController.topViewController {
+                    textFieldViewController = topController
+                }
+                
+                if isEnabled == false {
+                    
+                    //If viewController is kind of enable viewController class, then assuming it's enabled.
+                    for enabledClass in enabledDistanceHandlingClasses {
+                        
+                        if textFieldViewController.isKind(of: enabledClass) {
+                            isEnabled = true
+                            break
+                        }
+                    }
+                }
+                
+                if isEnabled == true {
+                    
+                    //If viewController is kind of disabled viewController class, then assuming it's disabled.
+                    for disabledClass in disabledDistanceHandlingClasses {
+                        
+                        if textFieldViewController.isKind(of: disabledClass) {
+                            isEnabled = false
+                            break
+                        }
+                    }
+                    
+                    //Special Controllers
+                    if isEnabled == true {
+                        
+                        let classNameString = NSStringFromClass(type(of: textFieldViewController.self))
+                        
+                        //_UIAlertControllerTextFieldViewController
+                        if classNameString.contains("UIAlertController") && classNameString.hasSuffix("TextFieldViewController") {
+                            isEnabled = false
+                        }
+                    }
+                }
+            }
+        }
+        
+        return isEnabled
+    }
+    
+    /**
+    To set keyboard distance from textField. can't be less than zero. Default is 10.0.
+    */
+    @objc public var keyboardDistanceFromTextField: CGFloat {
+        
+        set {
+            _privateKeyboardDistanceFromTextField =  max(0, newValue)
+            showLog("keyboardDistanceFromTextField: \(_privateKeyboardDistanceFromTextField)")
+        }
+        get {
+            return _privateKeyboardDistanceFromTextField
+        }
+    }
+    
+    /**
+     Boolean to know if keyboard is showing.
+     */
+    @objc public var keyboardShowing: Bool {
+        
+        return _privateIsKeyboardShowing
+    }
+    
+    /**
+     moved distance to the top used to maintain distance between keyboard and textField. Most of the time this will be a positive value.
+     */
+    @objc public var movedDistance: CGFloat {
+        
+        return _privateMovedDistance
+    }
+    
+    /**
+    Will be called then movedDistance will be changed
+     */
+    @objc public var movedDistanceChanged: ((CGFloat) -> Void)?
+
+    /**
+    Returns the default singleton instance.
+    */
+    @objc public static let shared = IQKeyboardManager()
+    
+    ///-------------------------
+    /// MARK: IQToolbar handling
+    ///-------------------------
+    
+    /**
+    Automatic add the IQToolbar functionality. Default is YES.
+    */
+    @objc public var enableAutoToolbar = true {
+        
+        didSet {
+
+            privateIsEnableAutoToolbar() ? addToolbarIfRequired() : removeToolbarIfRequired()
+
+            let enableToolbar = enableAutoToolbar ? "Yes" : "NO"
+
+            showLog("enableAutoToolbar: \(enableToolbar)")
+        }
+    }
+    
+    private func privateIsEnableAutoToolbar() -> Bool {
+        
+        var enableToolbar = enableAutoToolbar
+        
+        if var textFieldViewController = _textFieldView?.viewContainingController() {
+            
+            //If it is searchBar textField embedded in Navigation Bar
+            if _textFieldView?.textFieldSearchBar() != nil, let navController = textFieldViewController as? UINavigationController, let topController = navController.topViewController {
+                textFieldViewController = topController
+            }
+
+            if enableToolbar == false {
+                
+                //If found any toolbar enabled classes then return.
+                for enabledClass in enabledToolbarClasses {
+                    
+                    if textFieldViewController.isKind(of: enabledClass) {
+                        enableToolbar = true
+                        break
+                    }
+                }
+            }
+            
+            if enableToolbar == true {
+                
+                //If found any toolbar disabled classes then return.
+                for disabledClass in disabledToolbarClasses {
+                    
+                    if textFieldViewController.isKind(of: disabledClass) {
+                        enableToolbar = false
+                        break
+                    }
+                }
+                
+                //Special Controllers
+                if enableToolbar == true {
+                    
+                    let classNameString = NSStringFromClass(type(of: textFieldViewController.self))
+                    
+                    //_UIAlertControllerTextFieldViewController
+                    if classNameString.contains("UIAlertController") && classNameString.hasSuffix("TextFieldViewController") {
+                        enableToolbar = false
+                    }
+                }
+            }
+        }
+
+        return enableToolbar
+    }
+
+    /**
+     /**
+     IQAutoToolbarBySubviews:   Creates Toolbar according to subview's hirarchy of Textfield's in view.
+     IQAutoToolbarByTag:        Creates Toolbar according to tag property of TextField's.
+     IQAutoToolbarByPosition:   Creates Toolbar according to the y,x position of textField in it's superview coordinate.
+     
+     Default is IQAutoToolbarBySubviews.
+     */
+    AutoToolbar managing behaviour. Default is IQAutoToolbarBySubviews.
+    */
+    @objc public var toolbarManageBehaviour = IQAutoToolbarManageBehaviour.bySubviews
+
+    /**
+    If YES, then uses textField's tintColor property for IQToolbar, otherwise tint color is default. Default is NO.
+    */
+    @objc public var shouldToolbarUsesTextFieldTintColor = false
+    
+    /**
+    This is used for toolbar.tintColor when textfield.keyboardAppearance is UIKeyboardAppearanceDefault. If shouldToolbarUsesTextFieldTintColor is YES then this property is ignored. Default is nil and uses black color.
+    */
+    @objc public var toolbarTintColor: UIColor?
+
+    /**
+     This is used for toolbar.barTintColor. Default is nil.
+     */
+    @objc public var toolbarBarTintColor: UIColor?
+
+    /**
+     IQPreviousNextDisplayModeDefault:      Show NextPrevious when there are more than 1 textField otherwise hide.
+     IQPreviousNextDisplayModeAlwaysHide:   Do not show NextPrevious buttons in any case.
+     IQPreviousNextDisplayModeAlwaysShow:   Always show nextPrevious buttons, if there are more than 1 textField then both buttons will be visible but will be shown as disabled.
+     */
+    @objc public var previousNextDisplayMode = IQPreviousNextDisplayMode.default
+
+    /**
+     Toolbar previous/next/done button icon, If nothing is provided then check toolbarDoneBarButtonItemText to draw done button.
+     */
+    @objc public var toolbarPreviousBarButtonItemImage: UIImage?
+    @objc public var toolbarNextBarButtonItemImage: UIImage?
+    @objc public var toolbarDoneBarButtonItemImage: UIImage?
+
+    /**
+     Toolbar previous/next/done button text, If nothing is provided then system default 'UIBarButtonSystemItemDone' will be used.
+     */
+    @objc public var toolbarPreviousBarButtonItemText: String?
+    @objc public var toolbarPreviousBarButtonItemAccessibilityLabel: String?
+    @objc public var toolbarNextBarButtonItemText: String?
+    @objc public var toolbarNextBarButtonItemAccessibilityLabel: String?
+    @objc public var toolbarDoneBarButtonItemText: String?
+    @objc public var toolbarDoneBarButtonItemAccessibilityLabel: String?
+
+    /**
+    If YES, then it add the textField's placeholder text on IQToolbar. Default is YES.
+    */
+    @objc public var shouldShowToolbarPlaceholder = true
+
+    /**
+    Placeholder Font. Default is nil.
+    */
+    @objc public var placeholderFont: UIFont?
+    
+    /**
+     Placeholder Color. Default is nil. Which means lightGray
+     */
+    @objc public var placeholderColor: UIColor?
+    
+    /**
+     Placeholder Button Color when it's treated as button. Default is nil.
+     */
+    @objc public var placeholderButtonColor: UIColor?
+
+    ///--------------------------
+    /// MARK: UITextView handling
+    ///--------------------------
+    
+    /** used to adjust contentInset of UITextView. */
+    private var         startingTextViewContentInsets = UIEdgeInsets()
+    
+    /** used to adjust scrollIndicatorInsets of UITextView. */
+    private var         startingTextViewScrollIndicatorInsets = UIEdgeInsets()
+    
+    /** used with textView to detect a textFieldView contentInset is changed or not. (Bug ID: #92)*/
+    private var         isTextViewContentInsetChanged = false
+
+    ///---------------------------------------
+    /// MARK: UIKeyboard appearance overriding
+    ///---------------------------------------
+
+    /**
+    Override the keyboardAppearance for all textField/textView. Default is NO.
+    */
+    @objc public var overrideKeyboardAppearance = false
+    
+    /**
+    If overrideKeyboardAppearance is YES, then all the textField keyboardAppearance is set using this property.
+    */
+    @objc public var keyboardAppearance = UIKeyboardAppearance.default
+
+    ///-----------------------------------------------------------
+    /// MARK: UITextField/UITextView Next/Previous/Resign handling
+    ///-----------------------------------------------------------
+
+    /**
+    Resigns Keyboard on touching outside of UITextField/View. Default is NO.
+    */
+    @objc public var shouldResignOnTouchOutside = false {
+        
+        didSet {
+            resignFirstResponderGesture.isEnabled = privateShouldResignOnTouchOutside()
+            
+            let shouldResign = shouldResignOnTouchOutside ? "Yes" : "NO"
+            
+            showLog("shouldResignOnTouchOutside: \(shouldResign)")
+        }
+    }
+    
+    /** TapGesture to resign keyboard on view's touch. It's a readonly property and exposed only for adding/removing dependencies if your added gesture does have collision with this one */
+    @objc lazy public var resignFirstResponderGesture: UITapGestureRecognizer = {
+
+        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.tapRecognized(_:)))
+        tapGesture.cancelsTouchesInView = false
+        tapGesture.delegate = self
+
+        return tapGesture
+    }()
+    
+    /*******************************************/
+    
+    private func privateShouldResignOnTouchOutside() -> Bool {
+        
+        var shouldResign = shouldResignOnTouchOutside
+        
+        let enableMode = _textFieldView?.shouldResignOnTouchOutsideMode
+        
+        if enableMode == .enabled {
+            shouldResign = true
+        } else if enableMode == .disabled {
+            shouldResign = false
+        } else {
+            if var textFieldViewController = _textFieldView?.viewContainingController() {
+                
+                //If it is searchBar textField embedded in Navigation Bar
+                if _textFieldView?.textFieldSearchBar() != nil, let navController = textFieldViewController as? UINavigationController, let topController = navController.topViewController {
+                    textFieldViewController = topController
+                }
+
+                if shouldResign == false {
+                    
+                    //If viewController is kind of enable viewController class, then assuming shouldResignOnTouchOutside is enabled.
+                    for enabledClass in enabledTouchResignedClasses {
+                        
+                        if textFieldViewController.isKind(of: enabledClass) {
+                            shouldResign = true
+                            break
+                        }
+                    }
+                }
+                
+                if shouldResign == true {
+                    
+                    //If viewController is kind of disable viewController class, then assuming shouldResignOnTouchOutside is disable.
+                    for disabledClass in disabledTouchResignedClasses {
+                        
+                        if textFieldViewController.isKind(of: disabledClass) {
+                            shouldResign = false
+                            break
+                        }
+                    }
+                    
+                    //Special Controllers
+                    if shouldResign == true {
+                        
+                        let classNameString = NSStringFromClass(type(of: textFieldViewController.self))
+                        
+                        //_UIAlertControllerTextFieldViewController
+                        if classNameString.contains("UIAlertController") && classNameString.hasSuffix("TextFieldViewController") {
+                            shouldResign = false
+                        }
+                    }
+                }
+            }
+        }
+        
+        return shouldResign
+    }
+    
+    /**
+    Resigns currently first responder field.
+    */
+    @objc @discardableResult public func resignFirstResponder() -> Bool {
+        
+        if let textFieldRetain = _textFieldView {
+            
+            //Resigning first responder
+            let isResignFirstResponder = textFieldRetain.resignFirstResponder()
+            
+            //  If it refuses then becoming it as first responder again.    (Bug ID: #96)
+            if isResignFirstResponder == false {
+                //If it refuses to resign then becoming it first responder again for getting notifications callback.
+                textFieldRetain.becomeFirstResponder()
+                
+                showLog("Refuses to resign first responder: \(textFieldRetain)")
+            }
+            
+            return isResignFirstResponder
+        }
+        
+        return false
+    }
+    
+    /**
+    Returns YES if can navigate to previous responder textField/textView, otherwise NO.
+    */
+    @objc public var canGoPrevious: Bool {
+        //Getting all responder view's.
+        if let textFields = responderViews() {
+            if let  textFieldRetain = _textFieldView {
+                
+                //Getting index of current textField.
+                if let index = textFields.firstIndex(of: textFieldRetain) {
+                    
+                    //If it is not first textField. then it's previous object canBecomeFirstResponder.
+                    if index > 0 {
+                        return true
+                    }
+                }
+            }
+        }
+        return false
+    }
+    
+    /**
+    Returns YES if can navigate to next responder textField/textView, otherwise NO.
+    */
+    @objc public var canGoNext: Bool {
+        //Getting all responder view's.
+        if let textFields = responderViews() {
+            if let  textFieldRetain = _textFieldView {
+                //Getting index of current textField.
+                if let index = textFields.firstIndex(of: textFieldRetain) {
+                    
+                    //If it is not first textField. then it's previous object canBecomeFirstResponder.
+                    if index < textFields.count-1 {
+                        return true
+                    }
+                }
+            }
+        }
+        return false
+    }
+    
+    /**
+    Navigate to previous responder textField/textView.
+    */
+    @objc @discardableResult public func goPrevious() -> Bool {
+        
+        //Getting all responder view's.
+        if let  textFieldRetain = _textFieldView {
+            if let textFields = responderViews() {
+                //Getting index of current textField.
+                if let index = textFields.firstIndex(of: textFieldRetain) {
+                    
+                    //If it is not first textField. then it's previous object becomeFirstResponder.
+                    if index > 0 {
+                        
+                        let nextTextField = textFields[index-1]
+                        
+                        let isAcceptAsFirstResponder = nextTextField.becomeFirstResponder()
+                        
+                        //  If it refuses then becoming previous textFieldView as first responder again.    (Bug ID: #96)
+                        if isAcceptAsFirstResponder == false {
+                            //If next field refuses to become first responder then restoring old textField as first responder.
+                            textFieldRetain.becomeFirstResponder()
+                            
+                            showLog("Refuses to become first responder: \(nextTextField)")
+                        }
+                        
+                        return isAcceptAsFirstResponder
+                    }
+                }
+            }
+        }
+        
+        return false
+    }
+    
+    /**
+    Navigate to next responder textField/textView.
+    */
+    @objc @discardableResult public func goNext() -> Bool {
+
+        //Getting all responder view's.
+        if let  textFieldRetain = _textFieldView {
+            if let textFields = responderViews() {
+                //Getting index of current textField.
+                if let index = textFields.firstIndex(of: textFieldRetain) {
+                    //If it is not last textField. then it's next object becomeFirstResponder.
+                    if index < textFields.count-1 {
+                        
+                        let nextTextField = textFields[index+1]
+                        
+                        let isAcceptAsFirstResponder = nextTextField.becomeFirstResponder()
+                        
+                        //  If it refuses then becoming previous textFieldView as first responder again.    (Bug ID: #96)
+                        if isAcceptAsFirstResponder == false {
+                            //If next field refuses to become first responder then restoring old textField as first responder.
+                            textFieldRetain.becomeFirstResponder()
+                            
+                            showLog("Refuses to become first responder: \(nextTextField)")
+                        }
+                        
+                        return isAcceptAsFirstResponder
+                    }
+                }
+            }
+        }
+
+        return false
+    }
+    
+    /**	previousAction. */
+    @objc internal func previousAction (_ barButton: IQBarButtonItem) {
+        
+        //If user wants to play input Click sound.
+        if shouldPlayInputClicks == true {
+            //Play Input Click Sound.
+            UIDevice.current.playInputClick()
+        }
+        
+        if canGoPrevious == true {
+            
+            if let textFieldRetain = _textFieldView {
+                let isAcceptAsFirstResponder = goPrevious()
+                
+                var invocation = barButton.invocation
+                var sender = textFieldRetain
+
+                //Handling search bar special case
+                do {
+                    if let searchBar = textFieldRetain.textFieldSearchBar() {
+                        invocation = searchBar.keyboardToolbar.previousBarButton.invocation
+                        sender = searchBar
+                    }
+                }
+
+                if isAcceptAsFirstResponder {
+                    invocation?.invoke(from: sender)
+                }
+            }
+        }
+    }
+    
+    /**	nextAction. */
+    @objc internal func nextAction (_ barButton: IQBarButtonItem) {
+        
+        //If user wants to play input Click sound.
+        if shouldPlayInputClicks == true {
+            //Play Input Click Sound.
+            UIDevice.current.playInputClick()
+        }
+        
+        if canGoNext == true {
+            
+            if let textFieldRetain = _textFieldView {
+                let isAcceptAsFirstResponder = goNext()
+                
+                var invocation = barButton.invocation
+                var sender = textFieldRetain
+
+                //Handling search bar special case
+                do {
+                    if let searchBar = textFieldRetain.textFieldSearchBar() {
+                        invocation = searchBar.keyboardToolbar.nextBarButton.invocation
+                        sender = searchBar
+                    }
+                }
+
+                if isAcceptAsFirstResponder {
+                    invocation?.invoke(from: sender)
+                }
+            }
+        }
+    }
+    
+    /**	doneAction. Resigning current textField. */
+    @objc internal func doneAction (_ barButton: IQBarButtonItem) {
+        
+        //If user wants to play input Click sound.
+        if shouldPlayInputClicks == true {
+            //Play Input Click Sound.
+            UIDevice.current.playInputClick()
+        }
+        
+        if let textFieldRetain = _textFieldView {
+            //Resign textFieldView.
+            let isResignedFirstResponder = resignFirstResponder()
+            
+            var invocation = barButton.invocation
+            var sender = textFieldRetain
+
+            //Handling search bar special case
+            do {
+                if let searchBar = textFieldRetain.textFieldSearchBar() {
+                    invocation = searchBar.keyboardToolbar.doneBarButton.invocation
+                    sender = searchBar
+                }
+            }
+
+            if isResignedFirstResponder {
+                invocation?.invoke(from: sender)
+            }
+        }
+    }
+    
+    /** Resigning on tap gesture.   (Enhancement ID: #14)*/
+    @objc internal func tapRecognized(_ gesture: UITapGestureRecognizer) {
+        
+        if gesture.state == .ended {
+
+            //Resigning currently responder textField.
+            resignFirstResponder()
+        }
+    }
+    
+    /** Note: returning YES is guaranteed to allow simultaneous recognition. returning NO is not guaranteed to prevent simultaneous recognition, as the other gesture's delegate may return YES. */
+    @objc public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
+        return false
+    }
+    
+    /** To not detect touch events in a subclass of UIControl, these may have added their own selector for specific work */
+    @objc public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
+        //  Should not recognize gesture if the clicked view is either UIControl or UINavigationBar(<Back button etc...)    (Bug ID: #145)
+        
+        for ignoreClass in touchResignedGestureIgnoreClasses {
+            
+            if touch.view?.isKind(of: ignoreClass) == true {
+                return false
+            }
+        }
+
+        return true
+    }
+    
+    ///-----------------------
+    /// MARK: UISound handling
+    ///-----------------------
+
+    /**
+    If YES, then it plays inputClick sound on next/previous/done click.
+    */
+    @objc public var shouldPlayInputClicks = true
+
+    ///---------------------------
+    /// MARK: UIAnimation handling
+    ///---------------------------
+
+    /**
+    If YES, then calls 'setNeedsLayout' and 'layoutIfNeeded' on any frame update of to viewController's view.
+    */
+    @objc public var layoutIfNeededOnUpdate = false
+
+    ///------------------------------------
+    /// MARK: Class Level disabling methods
+    ///------------------------------------
+    
+    /**
+     Disable distance handling within the scope of disabled distance handling viewControllers classes. Within this scope, 'enabled' property is ignored. Class should be kind of UIViewController.
+     */
+    @objc public var disabledDistanceHandlingClasses  = [UIViewController.Type]()
+    
+    /**
+     Enable distance handling within the scope of enabled distance handling viewControllers classes. Within this scope, 'enabled' property is ignored. Class should be kind of UIViewController. If same Class is added in disabledDistanceHandlingClasses list, then enabledDistanceHandlingClasses will be ignored.
+     */
+    @objc public var enabledDistanceHandlingClasses  = [UIViewController.Type]()
+    
+    /**
+     Disable automatic toolbar creation within the scope of disabled toolbar viewControllers classes. Within this scope, 'enableAutoToolbar' property is ignored. Class should be kind of UIViewController.
+     */
+    @objc public var disabledToolbarClasses  = [UIViewController.Type]()
+    
+    /**
+     Enable automatic toolbar creation within the scope of enabled toolbar viewControllers classes. Within this scope, 'enableAutoToolbar' property is ignored. Class should be kind of UIViewController. If same Class is added in disabledToolbarClasses list, then enabledToolbarClasses will be ignore.
+     */
+    @objc public var enabledToolbarClasses  = [UIViewController.Type]()
+
+    /**
+     Allowed subclasses of UIView to add all inner textField, this will allow to navigate between textField contains in different superview. Class should be kind of UIView.
+     */
+    @objc public var toolbarPreviousNextAllowedClasses  = [UIView.Type]()
+    
+    /**
+     Disabled classes to ignore 'shouldResignOnTouchOutside' property, Class should be kind of UIViewController.
+     */
+    @objc public var disabledTouchResignedClasses  = [UIViewController.Type]()
+    
+    /**
+     Enabled classes to forcefully enable 'shouldResignOnTouchOutsite' property. Class should be kind of UIViewController. If same Class is added in disabledTouchResignedClasses list, then enabledTouchResignedClasses will be ignored.
+     */
+    @objc public var enabledTouchResignedClasses  = [UIViewController.Type]()
+    
+    /**
+     if shouldResignOnTouchOutside is enabled then you can customise the behaviour to not recognise gesture touches on some specific view subclasses. Class should be kind of UIView. Default is [UIControl, UINavigationBar]
+     */
+    @objc public var touchResignedGestureIgnoreClasses  = [UIView.Type]()
+
+    ///----------------------------------
+    /// MARK: Third Party Library support
+    /// Add TextField/TextView Notifications customised Notifications. For example while using YYTextView https://github.com/ibireme/YYText
+    ///----------------------------------
+    
+    /**
+    Add/Remove customised Notification for third party customised TextField/TextView. Please be aware that the Notification object must be idential to UITextField/UITextView Notification objects and customised TextField/TextView support must be idential to UITextField/UITextView.
+    @param didBeginEditingNotificationName This should be identical to UITextViewTextDidBeginEditingNotification
+    @param didEndEditingNotificationName This should be identical to UITextViewTextDidEndEditingNotification
+    */
+    
+    @objc public func registerTextFieldViewClass(_ aClass: UIView.Type, didBeginEditingNotificationName: String, didEndEditingNotificationName: String) {
+
+        NotificationCenter.default.addObserver(self, selector: #selector(self.textFieldViewDidBeginEditing(_:)), name: Notification.Name(rawValue: didBeginEditingNotificationName), object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(self.textFieldViewDidEndEditing(_:)), name: Notification.Name(rawValue: didEndEditingNotificationName), object: nil)
+    }
+    
+    @objc public func unregisterTextFieldViewClass(_ aClass: UIView.Type, didBeginEditingNotificationName: String, didEndEditingNotificationName: String) {
+        
+        NotificationCenter.default.removeObserver(self, name: Notification.Name(rawValue: didBeginEditingNotificationName), object: nil)
+        NotificationCenter.default.removeObserver(self, name: Notification.Name(rawValue: didEndEditingNotificationName), object: nil)
+    }
+    
+    /**************************************************************************************/
+    ///------------------------
+    /// MARK: Private variables
+    ///------------------------
+
+    /*******************************************/
+
+    /** To save UITextField/UITextView object voa textField/textView notifications. */
+    private weak var    _textFieldView: UIView?
+    
+    /** To save rootViewController.view.frame.origin. */
+    private var         _topViewBeginOrigin = IQKeyboardManager.kIQCGPointInvalid
+
+    /** To overcome with popGestureRecognizer issue Bug ID: #1361 */
+    private weak var    _rootViewControllerWhilePopGestureRecognizerActive: UIViewController?
+    private var         _topViewBeginOriginWhilePopGestureRecognizerActive = IQKeyboardManager.kIQCGPointInvalid
+
+    /** To save rootViewController */
+    private weak var    _rootViewController: UIViewController?
+    
+    /*******************************************/
+
+    /** Variable to save lastScrollView that was scrolled. */
+    private weak var    _lastScrollView: UIScrollView?
+    
+    /** LastScrollView's initial contentOffset. */
+    private var         _startingContentOffset = CGPoint.zero
+    
+    /** LastScrollView's initial scrollIndicatorInsets. */
+    private var         _startingScrollIndicatorInsets = UIEdgeInsets()
+    
+    /** LastScrollView's initial contentInsets. */
+    private var         _startingContentInsets = UIEdgeInsets()
+    
+    /*******************************************/
+
+    /** To save keyboardWillShowNotification. Needed for enable keyboard functionality. */
+    private var         _kbShowNotification: Notification?
+    
+    /** To save keyboard rame. */
+    private var         _kbFrame = CGRect.zero
+    
+    /** To save keyboard animation duration. */
+    private var         _animationDuration: TimeInterval = 0.25
+    
+    /** To mimic the keyboard animation */
+    #if swift(>=4.2)
+    private var         _animationCurve: UIView.AnimationOptions = .curveEaseOut
+    #else
+    private var         _animationCurve: UIViewAnimationOptions = .curveEaseOut
+    #endif
+
+    /*******************************************/
+
+    /** Boolean to maintain keyboard is showing or it is hide. To solve rootViewController.view.frame calculations. */
+    private var         _privateIsKeyboardShowing = false
+
+    private var         _privateMovedDistance: CGFloat = 0.0 {
+        didSet {
+            movedDistanceChanged?(_privateMovedDistance)
+        }
+    }
+    
+    /** To use with keyboardDistanceFromTextField. */
+    private var         _privateKeyboardDistanceFromTextField: CGFloat = 10.0
+    
+    /** To know if we have any pending request to adjust view position. */
+    private var         _privateHasPendingAdjustRequest = false
+
+    /**************************************************************************************/
+    
+    ///--------------------------------------
+    /// MARK: Initialization/Deinitialization
+    ///--------------------------------------
+    
+    /*  Singleton Object Initialization. */
+    override init() {
+        
+        super.init()
+
+        self.registerAllNotifications()
+
+        //Creating gesture for @shouldResignOnTouchOutside. (Enhancement ID: #14)
+        resignFirstResponderGesture.isEnabled = shouldResignOnTouchOutside
+        
+        //Loading IQToolbar, IQTitleBarButtonItem, IQBarButtonItem to fix first time keyboard appearance delay (Bug ID: #550)
+        //If you experience exception breakpoint issue at below line then try these solutions https://stackoverflow.com/questions/27375640/all-exception-break-point-is-stopping-for-no-reason-on-simulator
+        let textField = UITextField()
+        textField.addDoneOnKeyboardWithTarget(nil, action: #selector(self.doneAction(_:)))
+        textField.addPreviousNextDoneOnKeyboardWithTarget(nil, previousAction: #selector(self.previousAction(_:)), nextAction: #selector(self.nextAction(_:)), doneAction: #selector(self.doneAction(_:)))
+        
+        disabledDistanceHandlingClasses.append(UITableViewController.self)
+        disabledDistanceHandlingClasses.append(UIAlertController.self)
+        disabledToolbarClasses.append(UIAlertController.self)
+        disabledTouchResignedClasses.append(UIAlertController.self)
+        toolbarPreviousNextAllowedClasses.append(UITableView.self)
+        toolbarPreviousNextAllowedClasses.append(UICollectionView.self)
+        toolbarPreviousNextAllowedClasses.append(IQPreviousNextView.self)
+        touchResignedGestureIgnoreClasses.append(UIControl.self)
+        touchResignedGestureIgnoreClasses.append(UINavigationBar.self)
+    }
+    
+    /** Override +load method to enable KeyboardManager when class loader load IQKeyboardManager. Enabling when app starts (No need to write any code) */
+    /** It doesn't work from Swift 1.2 */
+//    override public class func load() {
+//        super.load()
+//        
+//        //Enabling IQKeyboardManager.
+//        IQKeyboardManager.shared.enable = true
+//    }
+    
+    deinit {
+        //  Disable the keyboard manager.
+        enable = false
+
+        //Removing notification observers on dealloc.
+        NotificationCenter.default.removeObserver(self)
+    }
+    
+    /** Getting keyWindow. */
+    private func keyWindow() -> UIWindow? {
+        
+        if let keyWindow = _textFieldView?.window {
+            return keyWindow
+        } else {
+            
+            struct Static {
+                /** @abstract   Save keyWindow object for reuse.
+                @discussion Sometimes [[UIApplication sharedApplication] keyWindow] is returning nil between the app.   */
+                static weak var keyWindow: UIWindow?
+            }
+
+            var originalKeyWindow : UIWindow? = nil
+            
+            #if swift(>=5.1)
+            if #available(iOS 13, *) {
+                originalKeyWindow = UIApplication.shared.connectedScenes
+                    .compactMap { $0 as? UIWindowScene }
+                    .flatMap { $0.windows }
+                    .first(where: { $0.isKeyWindow })
+            } else {
+                originalKeyWindow = UIApplication.shared.keyWindow
+            }
+            #else
+            originalKeyWindow = UIApplication.shared.keyWindow
+            #endif
+
+            
+            
+            //If original key window is not nil and the cached keywindow is also not original keywindow then changing keywindow.
+            if let originalKeyWindow = originalKeyWindow {
+                Static.keyWindow = originalKeyWindow
+            }
+
+            //Return KeyWindow
+            return Static.keyWindow
+        }
+    }
+
+    ///-----------------------
+    /// MARK: Helper Functions
+    ///-----------------------
+    
+    private func optimizedAdjustPosition() {
+        if _privateHasPendingAdjustRequest == false {
+            _privateHasPendingAdjustRequest = true
+            OperationQueue.main.addOperation {
+                self.adjustPosition()
+                self._privateHasPendingAdjustRequest = false
+            }
+        }
+    }
+
+    /* Adjusting RootViewController's frame according to interface orientation. */
+    private func adjustPosition() {
+        
+        //  We are unable to get textField object while keyboard showing on WKWebView's textField.  (Bug ID: #11)
+        if _privateHasPendingAdjustRequest == true,
+            let textFieldView = _textFieldView,
+            let rootController = textFieldView.parentContainerViewController(),
+            let window = keyWindow(),
+            let textFieldViewRectInWindow = textFieldView.superview?.convert(textFieldView.frame, to: window),
+            let textFieldViewRectInRootSuperview = textFieldView.superview?.convert(textFieldView.frame, to: rootController.view?.superview) {
+            let startTime = CACurrentMediaTime()
+            showLog("****** \(#function) started ******", indentation: 1)
+            
+            //  Getting RootViewOrigin.
+            var rootViewOrigin = rootController.view.frame.origin
+            
+            //Maintain keyboardDistanceFromTextField
+            var specialKeyboardDistanceFromTextField = textFieldView.keyboardDistanceFromTextField
+            
+            if let searchBar = textFieldView.textFieldSearchBar() {
+                
+                specialKeyboardDistanceFromTextField = searchBar.keyboardDistanceFromTextField
+            }
+            
+            let newKeyboardDistanceFromTextField = (specialKeyboardDistanceFromTextField == kIQUseDefaultKeyboardDistance) ? keyboardDistanceFromTextField : specialKeyboardDistanceFromTextField
+
+            var kbSize = _kbFrame.size
+
+            do {
+                var kbFrame = _kbFrame
+
+                kbFrame.origin.y -= newKeyboardDistanceFromTextField
+                kbFrame.size.height += newKeyboardDistanceFromTextField
+
+                //Calculating actual keyboard covered size respect to window, keyboard frame may be different when hardware keyboard is attached (Bug ID: #469) (Bug ID: #381) (Bug ID: #1506)
+                let intersectRect = kbFrame.intersection(window.frame)
+                
+                if intersectRect.isNull {
+                    kbSize = CGSize(width: kbFrame.size.width, height: 0)
+                } else {
+                    kbSize = intersectRect.size
+                }
+            }
+
+            let statusBarHeight : CGFloat
+            
+            #if swift(>=5.1)
+            if #available(iOS 13, *) {
+                statusBarHeight = window.windowScene?.statusBarManager?.statusBarFrame.height ?? 0
+            } else {
+                statusBarHeight = UIApplication.shared.statusBarFrame.height
+            }
+            #else
+            statusBarHeight = UIApplication.shared.statusBarFrame.height
+            #endif
+
+            let navigationBarAreaHeight: CGFloat = statusBarHeight + ( rootController.navigationController?.navigationBar.frame.height ?? 0)
+            let layoutAreaHeight: CGFloat = rootController.view.layoutMargins.bottom
+
+            let topLayoutGuide: CGFloat = max(navigationBarAreaHeight, layoutAreaHeight) + 5
+            let bottomLayoutGuide: CGFloat = (textFieldView is UIScrollView && textFieldView.responds(to: #selector(getter: UITextView.isEditable))) ? 0 : rootController.view.layoutMargins.bottom  //Validation of textView for case where there is a tab bar at the bottom or running on iPhone X and textView is at the bottom.
+
+            //  Move positive = textField is hidden.
+            //  Move negative = textField is showing.
+            //  Calculating move position.
+            var move: CGFloat = min(textFieldViewRectInRootSuperview.minY-(topLayoutGuide), textFieldViewRectInWindow.maxY-(window.frame.height-kbSize.height)+bottomLayoutGuide)
+            
+            showLog("Need to move: \(move)")
+            
+            var superScrollView: UIScrollView?
+            var superView = textFieldView.superviewOfClassType(UIScrollView.self) as? UIScrollView
+            
+            //Getting UIScrollView whose scrolling is enabled.    //  (Bug ID: #285)
+            while let view = superView {
+                
+                if view.isScrollEnabled && view.shouldIgnoreScrollingAdjustment == false {
+                    superScrollView = view
+                    break
+                } else {
+                    //  Getting it's superScrollView.   //  (Enhancement ID: #21, #24)
+                    superView = view.superviewOfClassType(UIScrollView.self) as? UIScrollView
+                }
+            }
+            
+            //If there was a lastScrollView.    //  (Bug ID: #34)
+            if let lastScrollView = _lastScrollView {
+                //If we can't find current superScrollView, then setting lastScrollView to it's original form.
+                if superScrollView == nil {
+                    
+                    if lastScrollView.contentInset != self._startingContentInsets {
+                        showLog("Restoring contentInset to: \(_startingContentInsets)")
+                        UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                            
+                            lastScrollView.contentInset = self._startingContentInsets
+                            lastScrollView.scrollIndicatorInsets = self._startingScrollIndicatorInsets
+                        })
+                    }
+                    
+                    if lastScrollView.shouldRestoreScrollViewContentOffset == true && lastScrollView.contentOffset.equalTo(_startingContentOffset) == false {
+                        showLog("Restoring contentOffset to: \(_startingContentOffset)")
+                        
+                        var animatedContentOffset = false   //  (Bug ID: #1365, #1508, #1541)
+
+                        if #available(iOS 9, *) {
+                            animatedContentOffset = textFieldView.superviewOfClassType(UIStackView.self, belowView: lastScrollView) != nil
+                        }
+
+                        if animatedContentOffset {
+                            lastScrollView.setContentOffset(_startingContentOffset, animated: UIView.areAnimationsEnabled)
+                        } else {
+                            lastScrollView.contentOffset = _startingContentOffset
+                        }
+                    }
+                    
+                    _startingContentInsets = UIEdgeInsets()
+                    _startingScrollIndicatorInsets = UIEdgeInsets()
+                    _startingContentOffset = CGPoint.zero
+                    _lastScrollView = nil
+                } else if superScrollView != lastScrollView {     //If both scrollView's are different, then reset lastScrollView to it's original frame and setting current scrollView as last scrollView.
+                    
+                    if lastScrollView.contentInset != self._startingContentInsets {
+                        showLog("Restoring contentInset to: \(_startingContentInsets)")
+                        UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                            
+                            lastScrollView.contentInset = self._startingContentInsets
+                            lastScrollView.scrollIndicatorInsets = self._startingScrollIndicatorInsets
+                        })
+                    }
+                    
+                    if lastScrollView.shouldRestoreScrollViewContentOffset == true && lastScrollView.contentOffset.equalTo(_startingContentOffset) == false {
+                        showLog("Restoring contentOffset to: \(_startingContentOffset)")
+                        
+                        var animatedContentOffset = false   //  (Bug ID: #1365, #1508, #1541)
+                        
+                        if #available(iOS 9, *) {
+                            animatedContentOffset = textFieldView.superviewOfClassType(UIStackView.self, belowView: lastScrollView) != nil
+                        }
+                        
+                        if animatedContentOffset {
+                            lastScrollView.setContentOffset(_startingContentOffset, animated: UIView.areAnimationsEnabled)
+                        } else {
+                            lastScrollView.contentOffset = _startingContentOffset
+                        }
+                    }
+                    
+                    _lastScrollView = superScrollView
+                    if let scrollView = superScrollView {
+                        _startingContentInsets = scrollView.contentInset
+                        _startingContentOffset = scrollView.contentOffset
+
+                        #if swift(>=5.1)
+                        if #available(iOS 11.1, *) {
+                            _startingScrollIndicatorInsets = scrollView.verticalScrollIndicatorInsets
+                        } else {
+                            _startingScrollIndicatorInsets = scrollView.scrollIndicatorInsets
+                        }
+                        #else
+                        _startingScrollIndicatorInsets = scrollView.scrollIndicatorInsets
+                        #endif
+                    }
+                    
+                    showLog("Saving ScrollView New contentInset: \(_startingContentInsets) and contentOffset: \(_startingContentOffset)")
+                }
+                //Else the case where superScrollView == lastScrollView means we are on same scrollView after switching to different textField. So doing nothing, going ahead
+            } else if let unwrappedSuperScrollView = superScrollView {    //If there was no lastScrollView and we found a current scrollView. then setting it as lastScrollView.
+                _lastScrollView = unwrappedSuperScrollView
+                _startingContentInsets = unwrappedSuperScrollView.contentInset
+                _startingContentOffset = unwrappedSuperScrollView.contentOffset
+
+                #if swift(>=5.1)
+                if #available(iOS 11.1, *) {
+                    _startingScrollIndicatorInsets = unwrappedSuperScrollView.verticalScrollIndicatorInsets
+                } else {
+                    _startingScrollIndicatorInsets = unwrappedSuperScrollView.scrollIndicatorInsets
+                }
+                #else
+                _startingScrollIndicatorInsets = unwrappedSuperScrollView.scrollIndicatorInsets
+                #endif
+
+                showLog("Saving ScrollView contentInset: \(_startingContentInsets) and contentOffset: \(_startingContentOffset)")
+            }
+            
+            //  Special case for ScrollView.
+            //  If we found lastScrollView then setting it's contentOffset to show textField.
+            if let lastScrollView = _lastScrollView {
+                //Saving
+                var lastView = textFieldView
+                var superScrollView = _lastScrollView
+                
+                while let scrollView = superScrollView {
+                    
+                    var shouldContinue = false
+                    
+                    if move > 0 {
+                        shouldContinue =  move > (-scrollView.contentOffset.y - scrollView.contentInset.top)
+
+                    } else if let tableView = scrollView.superviewOfClassType(UITableView.self) as? UITableView {
+
+                        shouldContinue = scrollView.contentOffset.y > 0
+                        
+                        if shouldContinue == true, let tableCell = textFieldView.superviewOfClassType(UITableViewCell.self) as? UITableViewCell, let indexPath = tableView.indexPath(for: tableCell), let previousIndexPath = tableView.previousIndexPath(of: indexPath) {
+                            
+                            let previousCellRect = tableView.rectForRow(at: previousIndexPath)
+                            if previousCellRect.isEmpty == false {
+                                let previousCellRectInRootSuperview = tableView.convert(previousCellRect, to: rootController.view.superview)
+                                
+                                move = min(0, previousCellRectInRootSuperview.maxY - topLayoutGuide)
+                            }
+                        }
+                    } else if let collectionView = scrollView.superviewOfClassType(UICollectionView.self) as? UICollectionView {
+                        
+                        shouldContinue = scrollView.contentOffset.y > 0
+                        
+                        if shouldContinue == true, let collectionCell = textFieldView.superviewOfClassType(UICollectionViewCell.self) as? UICollectionViewCell, let indexPath = collectionView.indexPath(for: collectionCell), let previousIndexPath = collectionView.previousIndexPath(of: indexPath), let attributes = collectionView.layoutAttributesForItem(at: previousIndexPath) {
+
+                            let previousCellRect = attributes.frame
+                            if previousCellRect.isEmpty == false {
+                                let previousCellRectInRootSuperview = collectionView.convert(previousCellRect, to: rootController.view.superview)
+                                
+                                move = min(0, previousCellRectInRootSuperview.maxY - topLayoutGuide)
+                            }
+                        }
+                    } else {
+                        
+                        shouldContinue = textFieldViewRectInRootSuperview.origin.y < topLayoutGuide
+
+                        if shouldContinue {
+                            move = min(0, textFieldViewRectInRootSuperview.origin.y - topLayoutGuide)
+                        }
+                    }
+                    
+                    //Looping in upper hierarchy until we don't found any scrollView in it's upper hirarchy till UIWindow object.
+                    if shouldContinue {
+                        
+                        var tempScrollView = scrollView.superviewOfClassType(UIScrollView.self) as? UIScrollView
+                        var nextScrollView: UIScrollView?
+                        while let view = tempScrollView {
+                            
+                            if view.isScrollEnabled && view.shouldIgnoreScrollingAdjustment == false {
+                                nextScrollView = view
+                                break
+                            } else {
+                                tempScrollView = view.superviewOfClassType(UIScrollView.self) as? UIScrollView
+                            }
+                        }
+                        
+                        //Getting lastViewRect.
+                        if let lastViewRect = lastView.superview?.convert(lastView.frame, to: scrollView) {
+                            
+                            //Calculating the expected Y offset from move and scrollView's contentOffset.
+                            var shouldOffsetY = scrollView.contentOffset.y - min(scrollView.contentOffset.y, -move)
+                            
+                            //Rearranging the expected Y offset according to the view.
+                            shouldOffsetY = min(shouldOffsetY, lastViewRect.origin.y)
+                            
+                            //[_textFieldView isKindOfClass:[UITextView class]] If is a UITextView type
+                            //nextScrollView == nil    If processing scrollView is last scrollView in upper hierarchy (there is no other scrollView upper hierrchy.)
+                            //[_textFieldView isKindOfClass:[UITextView class]] If is a UITextView type
+                            //shouldOffsetY >= 0     shouldOffsetY must be greater than in order to keep distance from navigationBar (Bug ID: #92)
+                            if (textFieldView is UIScrollView && textFieldView.responds(to: #selector(getter: UITextView.isEditable))) &&
+                                nextScrollView == nil &&
+                                shouldOffsetY >= 0 {
+                                
+                                //  Converting Rectangle according to window bounds.
+                                if let currentTextFieldViewRect = textFieldView.superview?.convert(textFieldView.frame, to: window) {
+                                    
+                                    //Calculating expected fix distance which needs to be managed from navigation bar
+                                    let expectedFixDistance = currentTextFieldViewRect.minY - topLayoutGuide
+                                    
+                                    //Now if expectedOffsetY (superScrollView.contentOffset.y + expectedFixDistance) is lower than current shouldOffsetY, which means we're in a position where navigationBar up and hide, then reducing shouldOffsetY with expectedOffsetY (superScrollView.contentOffset.y + expectedFixDistance)
+                                    shouldOffsetY = min(shouldOffsetY, scrollView.contentOffset.y + expectedFixDistance)
+                                    
+                                    //Setting move to 0 because now we don't want to move any view anymore (All will be managed by our contentInset logic.
+                                    move = 0
+                                } else {
+                                    //Subtracting the Y offset from the move variable, because we are going to change scrollView's contentOffset.y to shouldOffsetY.
+                                    move -= (shouldOffsetY-scrollView.contentOffset.y)
+                                }
+                            } else {
+                                //Subtracting the Y offset from the move variable, because we are going to change scrollView's contentOffset.y to shouldOffsetY.
+                                move -= (shouldOffsetY-scrollView.contentOffset.y)
+                            }
+                            
+                            let newContentOffset = CGPoint(x: scrollView.contentOffset.x, y: shouldOffsetY)
+                            
+                            if scrollView.contentOffset.equalTo(newContentOffset) == false {
+
+                                showLog("old contentOffset: \(scrollView.contentOffset) new contentOffset: \(newContentOffset)")
+                                self.showLog("Remaining Move: \(move)")
+
+                                //Getting problem while using `setContentOffset:animated:`, So I used animation API.
+                                UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                                    
+                                    var animatedContentOffset = false   //  (Bug ID: #1365, #1508, #1541)
+                                    
+                                    if #available(iOS 9, *) {
+                                        animatedContentOffset = textFieldView.superviewOfClassType(UIStackView.self, belowView: scrollView) != nil
+                                    }
+
+                                    if animatedContentOffset {
+                                        scrollView.setContentOffset(newContentOffset, animated: UIView.areAnimationsEnabled)
+                                    } else {
+                                        scrollView.contentOffset = newContentOffset
+                                    }
+                                }) { _ in
+                                    
+                                    if scrollView is UITableView || scrollView is UICollectionView {
+                                        //This will update the next/previous states
+                                        self.addToolbarIfRequired()
+                                    }
+                                }
+                            }
+                        }
+                        
+                        //  Getting next lastView & superScrollView.
+                        lastView = scrollView
+                        superScrollView = nextScrollView
+                    } else {
+                        move = 0
+                        break
+                    }
+                }
+                
+                //Updating contentInset
+                if let lastScrollViewRect = lastScrollView.superview?.convert(lastScrollView.frame, to: window),
+                    lastScrollView.shouldIgnoreContentInsetAdjustment == false {
+                    
+                    var bottomInset: CGFloat = (kbSize.height)-(window.frame.height-lastScrollViewRect.maxY)
+                    var bottomScrollIndicatorInset = bottomInset - newKeyboardDistanceFromTextField
+
+                    // Update the insets so that the scroll vew doesn't shift incorrectly when the offset is near the bottom of the scroll view.
+                    bottomInset = max(_startingContentInsets.bottom, bottomInset)
+                    bottomScrollIndicatorInset = max(_startingScrollIndicatorInsets.bottom, bottomScrollIndicatorInset)
+
+                    #if swift(>=4.0)
+                    if #available(iOS 11, *) {
+                        bottomInset -= lastScrollView.safeAreaInsets.bottom
+                        bottomScrollIndicatorInset -= lastScrollView.safeAreaInsets.bottom
+                    }
+                    #endif
+
+                    var movedInsets = lastScrollView.contentInset
+                    movedInsets.bottom = bottomInset
+
+                    if lastScrollView.contentInset != movedInsets {
+                        showLog("old ContentInset: \(lastScrollView.contentInset) new ContentInset: \(movedInsets)")
+
+                        UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                            lastScrollView.contentInset = movedInsets
+                            
+                            var newScrollIndicatorInset : UIEdgeInsets
+                            
+                            #if swift(>=5.1)
+                            if #available(iOS 11.1, *) {
+                                newScrollIndicatorInset = lastScrollView.verticalScrollIndicatorInsets
+                            } else {
+                                newScrollIndicatorInset = lastScrollView.scrollIndicatorInsets
+                            }
+                            #else
+                            newScrollIndicatorInset = lastScrollView.scrollIndicatorInsets
+                            #endif
+
+                            newScrollIndicatorInset.bottom = bottomScrollIndicatorInset
+                            lastScrollView.scrollIndicatorInsets = newScrollIndicatorInset
+                        })
+                    }
+                }
+            }
+            //Going ahead. No else if.
+            
+            //Special case for UITextView(Readjusting textView.contentInset when textView hight is too big to fit on screen)
+            //_lastScrollView       If not having inside any scrollView, (now contentInset manages the full screen textView.
+            //[_textFieldView isKindOfClass:[UITextView class]] If is a UITextView type
+            if let textView = textFieldView as? UIScrollView, textView.isScrollEnabled, textFieldView.responds(to: #selector(getter: UITextView.isEditable)) {
+                
+//                CGRect rootSuperViewFrameInWindow = [_rootViewController.view.superview convertRect:_rootViewController.view.superview.bounds toView:keyWindow];
+//
+//                CGFloat keyboardOverlapping = CGRectGetMaxY(rootSuperViewFrameInWindow) - keyboardYPosition;
+//
+//                CGFloat textViewHeight = MIN(CGRectGetHeight(_textFieldView.frame), (CGRectGetHeight(rootSuperViewFrameInWindow)-topLayoutGuide-keyboardOverlapping));
+
+                let keyboardYPosition = window.frame.height - (kbSize.height-newKeyboardDistanceFromTextField)
+                var rootSuperViewFrameInWindow = window.frame
+                if let rootSuperview = rootController.view.superview {
+                    rootSuperViewFrameInWindow = rootSuperview.convert(rootSuperview.bounds, to: window)
+                }
+                
+                let keyboardOverlapping = rootSuperViewFrameInWindow.maxY - keyboardYPosition
+                
+                let textViewHeight = min(textView.frame.height, rootSuperViewFrameInWindow.height-topLayoutGuide-keyboardOverlapping)
+                
+                if textView.frame.size.height-textView.contentInset.bottom>textViewHeight {
+                    //_isTextViewContentInsetChanged,  If frame is not change by library in past, then saving user textView properties  (Bug ID: #92)
+                    if self.isTextViewContentInsetChanged == false {
+                        self.startingTextViewContentInsets = textView.contentInset
+                        
+                        #if swift(>=5.1)
+                        if #available(iOS 11.1, *) {
+                            self.startingTextViewScrollIndicatorInsets = textView.verticalScrollIndicatorInsets
+                        } else {
+                            self.startingTextViewScrollIndicatorInsets = textView.scrollIndicatorInsets
+                        }
+                        #else
+                        self.startingTextViewScrollIndicatorInsets = textView.scrollIndicatorInsets
+                        #endif
+                    }
+
+                    self.isTextViewContentInsetChanged = true
+
+                    var newContentInset = textView.contentInset
+                    newContentInset.bottom = textView.frame.size.height-textViewHeight
+
+                    #if swift(>=4.0)
+                    if #available(iOS 11, *) {
+                        newContentInset.bottom -= textView.safeAreaInsets.bottom
+                    }
+                    #endif
+
+                    if textView.contentInset != newContentInset {
+                        self.showLog("\(textFieldView) Old UITextView.contentInset: \(textView.contentInset) New UITextView.contentInset: \(newContentInset)")
+
+                        UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                            
+                            textView.contentInset = newContentInset
+                            textView.scrollIndicatorInsets = newContentInset
+                        }, completion: { (_) -> Void in })
+                    }
+                }
+            }
+                
+            //  +Positive or zero.
+            if move >= 0 {
+                
+                rootViewOrigin.y = max(rootViewOrigin.y - move, min(0, -(kbSize.height-newKeyboardDistanceFromTextField)))
+
+                if rootController.view.frame.origin.equalTo(rootViewOrigin) == false {
+                    showLog("Moving Upward")
+                    
+                    UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                        
+                        var rect = rootController.view.frame
+                        rect.origin = rootViewOrigin
+                        rootController.view.frame = rect
+                        
+                        //Animating content if needed (Bug ID: #204)
+                        if self.layoutIfNeededOnUpdate == true {
+                            //Animating content (Bug ID: #160)
+                            rootController.view.setNeedsLayout()
+                            rootController.view.layoutIfNeeded()
+                        }
+                        
+                        self.showLog("Set \(rootController) origin to: \(rootViewOrigin)")
+                    })
+                }
+                
+                _privateMovedDistance = (_topViewBeginOrigin.y-rootViewOrigin.y)
+            } else {  //  -Negative
+                let disturbDistance: CGFloat = rootViewOrigin.y-_topViewBeginOrigin.y
+                
+                //  disturbDistance Negative = frame disturbed.
+                //  disturbDistance positive = frame not disturbed.
+                if disturbDistance <= 0 {
+                    
+                    rootViewOrigin.y -= max(move, disturbDistance)
+                    
+                    if rootController.view.frame.origin.equalTo(rootViewOrigin) == false {
+                        showLog("Moving Downward")
+                        //  Setting adjusted rootViewRect
+                        //  Setting adjusted rootViewRect
+                        
+                        UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                            
+                            var rect = rootController.view.frame
+                            rect.origin = rootViewOrigin
+                            rootController.view.frame = rect
+                            
+                            //Animating content if needed (Bug ID: #204)
+                            if self.layoutIfNeededOnUpdate == true {
+                                //Animating content (Bug ID: #160)
+                                rootController.view.setNeedsLayout()
+                                rootController.view.layoutIfNeeded()
+                            }
+                            
+                            self.showLog("Set \(rootController) origin to: \(rootViewOrigin)")
+                        })
+                    }
+                    
+                    _privateMovedDistance = (_topViewBeginOrigin.y-rootViewOrigin.y)
+                }
+            }
+        
+            let elapsedTime = CACurrentMediaTime() - startTime
+            showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+        }
+    }
+
+    private func restorePosition() {
+        
+        _privateHasPendingAdjustRequest = false
+        
+        //  Setting rootViewController frame to it's original position. //  (Bug ID: #18)
+        if _topViewBeginOrigin.equalTo(IQKeyboardManager.kIQCGPointInvalid) == false {
+            
+            if let rootViewController = _rootViewController {
+                
+                if rootViewController.view.frame.origin.equalTo(self._topViewBeginOrigin) == false {
+                    //Used UIViewAnimationOptionBeginFromCurrentState to minimize strange animations.
+                    UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                        
+                        self.showLog("Restoring \(rootViewController) origin to: \(self._topViewBeginOrigin)")
+                        
+                        //  Setting it's new frame
+                        var rect = rootViewController.view.frame
+                        rect.origin = self._topViewBeginOrigin
+                        rootViewController.view.frame = rect
+                        
+                        //Animating content if needed (Bug ID: #204)
+                        if self.layoutIfNeededOnUpdate == true {
+                            //Animating content (Bug ID: #160)
+                            rootViewController.view.setNeedsLayout()
+                            rootViewController.view.layoutIfNeeded()
+                        }
+                    })
+                }
+                
+                self._privateMovedDistance = 0
+                
+                if rootViewController.navigationController?.interactivePopGestureRecognizer?.state == .began {
+                    self._rootViewControllerWhilePopGestureRecognizerActive = rootViewController
+                    self._topViewBeginOriginWhilePopGestureRecognizerActive = self._topViewBeginOrigin
+                }
+                
+                _rootViewController = nil
+            }
+        }
+    }
+
+    ///---------------------
+    /// MARK: Public Methods
+    ///---------------------
+    
+    /*  Refreshes textField/textView position if any external changes is explicitly made by user.   */
+    @objc public func reloadLayoutIfNeeded() {
+
+        if privateIsEnabled() == true {
+            if _privateIsKeyboardShowing == true,
+                _topViewBeginOrigin.equalTo(IQKeyboardManager.kIQCGPointInvalid) == false,
+                let textFieldView = _textFieldView,
+                textFieldView.isAlertViewTextField() == false {
+                optimizedAdjustPosition()
+            }
+        }
+    }
+
+    ///-------------------------------
+    /// MARK: UIKeyboard Notifications
+    ///-------------------------------
+
+    /*  UIKeyboardWillShowNotification. */
+    @objc internal func keyboardWillShow(_ notification: Notification?) {
+        
+        _kbShowNotification = notification
+
+        //  Boolean to know keyboard is showing/hiding
+        _privateIsKeyboardShowing = true
+        
+        let oldKBFrame = _kbFrame
+
+        if let info = notification?.userInfo {
+            
+            #if swift(>=4.2)
+            let curveUserInfoKey    = UIResponder.keyboardAnimationCurveUserInfoKey
+            let durationUserInfoKey = UIResponder.keyboardAnimationDurationUserInfoKey
+            let frameEndUserInfoKey = UIResponder.keyboardFrameEndUserInfoKey
+            #else
+            let curveUserInfoKey    = UIKeyboardAnimationCurveUserInfoKey
+            let durationUserInfoKey = UIKeyboardAnimationDurationUserInfoKey
+            let frameEndUserInfoKey = UIKeyboardFrameEndUserInfoKey
+            #endif
+
+            //  Getting keyboard animation.
+            if let curve = info[curveUserInfoKey] as? UInt {
+                _animationCurve = .init(rawValue: curve)
+            } else {
+                _animationCurve = .curveEaseOut
+            }
+            
+            //  Getting keyboard animation duration
+            if let duration = info[durationUserInfoKey] as? TimeInterval {
+                
+                //Saving animation duration
+                if duration != 0.0 {
+                    _animationDuration = duration
+                }
+            } else {
+                _animationDuration = 0.25
+            }
+            
+            //  Getting UIKeyboardSize.
+            if let kbFrame = info[frameEndUserInfoKey] as? CGRect {
+                
+                _kbFrame = kbFrame
+                showLog("UIKeyboard Frame: \(_kbFrame)")
+            }
+        }
+
+        if privateIsEnabled() == false {
+            restorePosition()
+            _topViewBeginOrigin = IQKeyboardManager.kIQCGPointInvalid
+            return
+        }
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+
+        //  (Bug ID: #5)
+        if let textFieldView = _textFieldView, _topViewBeginOrigin.equalTo(IQKeyboardManager.kIQCGPointInvalid) == true {
+            
+            //  keyboard is not showing(At the beginning only). We should save rootViewRect.
+            _rootViewController = textFieldView.parentContainerViewController()
+            if let controller = _rootViewController {
+                
+                if _rootViewControllerWhilePopGestureRecognizerActive == controller {
+                    _topViewBeginOrigin = _topViewBeginOriginWhilePopGestureRecognizerActive
+                } else {
+                    _topViewBeginOrigin = controller.view.frame.origin
+                }
+
+                _rootViewControllerWhilePopGestureRecognizerActive = nil
+                _topViewBeginOriginWhilePopGestureRecognizerActive = IQKeyboardManager.kIQCGPointInvalid
+                
+                self.showLog("Saving \(controller) beginning origin: \(self._topViewBeginOrigin)")
+            }
+        }
+
+        //If last restored keyboard size is different(any orientation accure), then refresh. otherwise not.
+        if _kbFrame.equalTo(oldKBFrame) == false {
+            
+            //If _textFieldView is inside UITableViewController then let UITableViewController to handle it (Bug ID: #37) (Bug ID: #76) See note:- https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html If it is UIAlertView textField then do not affect anything (Bug ID: #70).
+            
+            if _privateIsKeyboardShowing == true,
+                let textFieldView = _textFieldView,
+                textFieldView.isAlertViewTextField() == false {
+                
+                //  keyboard is already showing. adjust position.
+                optimizedAdjustPosition()
+            }
+        }
+        
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+
+    /*  UIKeyboardDidShowNotification. */
+    @objc internal func keyboardDidShow(_ notification: Notification?) {
+        
+        if privateIsEnabled() == false {
+            return
+        }
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+        
+        if let textFieldView = _textFieldView,
+            let parentController = textFieldView.parentContainerViewController(), (parentController.modalPresentationStyle == UIModalPresentationStyle.formSheet || parentController.modalPresentationStyle == UIModalPresentationStyle.pageSheet),
+            textFieldView.isAlertViewTextField() == false {
+            
+            self.optimizedAdjustPosition()
+        }
+        
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+
+    /*  UIKeyboardWillHideNotification. So setting rootViewController to it's default frame. */
+    @objc internal func keyboardWillHide(_ notification: Notification?) {
+        
+        //If it's not a fake notification generated by [self setEnable:NO].
+        if notification != nil {
+            _kbShowNotification = nil
+        }
+        
+        //  Boolean to know keyboard is showing/hiding
+        _privateIsKeyboardShowing = false
+        
+        if let info = notification?.userInfo {
+            
+            #if swift(>=4.2)
+            let durationUserInfoKey = UIResponder.keyboardAnimationDurationUserInfoKey
+            #else
+            let durationUserInfoKey = UIKeyboardAnimationDurationUserInfoKey
+            #endif
+
+            //  Getting keyboard animation duration
+            if let duration =  info[durationUserInfoKey] as? TimeInterval {
+                if duration != 0 {
+                    //  Setitng keyboard animation duration
+                    _animationDuration = duration
+                }
+            }
+        }
+        
+        //If not enabled then do nothing.
+        if privateIsEnabled() == false {
+            return
+        }
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+
+        //Commented due to #56. Added all the conditions below to handle WKWebView's textFields.    (Bug ID: #56)
+        //  We are unable to get textField object while keyboard showing on WKWebView's textField.  (Bug ID: #11)
+        //    if (_textFieldView == nil)   return
+
+        //Restoring the contentOffset of the lastScrollView
+        if let lastScrollView = _lastScrollView {
+            
+            UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                
+                if lastScrollView.contentInset != self._startingContentInsets {
+                    self.showLog("Restoring contentInset to: \(self._startingContentInsets)")
+                    lastScrollView.contentInset = self._startingContentInsets
+                    lastScrollView.scrollIndicatorInsets = self._startingScrollIndicatorInsets
+                }
+                
+                if lastScrollView.shouldRestoreScrollViewContentOffset == true && lastScrollView.contentOffset.equalTo(self._startingContentOffset) == false {
+                    self.showLog("Restoring contentOffset to: \(self._startingContentOffset)")
+                    
+                    var animatedContentOffset = false   //  (Bug ID: #1365, #1508, #1541)
+                    
+                    if #available(iOS 9, *) {
+                        animatedContentOffset = self._textFieldView?.superviewOfClassType(UIStackView.self, belowView: lastScrollView) != nil
+                    }
+                    
+                    if animatedContentOffset {
+                        lastScrollView.setContentOffset(self._startingContentOffset, animated: UIView.areAnimationsEnabled)
+                    } else {
+                        lastScrollView.contentOffset = self._startingContentOffset
+                    }
+                }
+                
+                // TODO: restore scrollView state
+                // This is temporary solution. Have to implement the save and restore scrollView state
+                var superScrollView: UIScrollView? = lastScrollView
+                
+                while let scrollView = superScrollView {
+                    
+                    let contentSize = CGSize(width: max(scrollView.contentSize.width, scrollView.frame.width), height: max(scrollView.contentSize.height, scrollView.frame.height))
+                    
+                    let minimumY = contentSize.height - scrollView.frame.height
+                    
+                    if minimumY < scrollView.contentOffset.y {
+                        
+                        let newContentOffset = CGPoint(x: scrollView.contentOffset.x, y: minimumY)
+                        if scrollView.contentOffset.equalTo(newContentOffset) == false {
+                            
+                            var animatedContentOffset = false   //  (Bug ID: #1365, #1508, #1541)
+                            
+                            if #available(iOS 9, *) {
+                                animatedContentOffset = self._textFieldView?.superviewOfClassType(UIStackView.self, belowView: scrollView) != nil
+                            }
+                            
+                            if animatedContentOffset {
+                                scrollView.setContentOffset(newContentOffset, animated: UIView.areAnimationsEnabled)
+                            } else {
+                                scrollView.contentOffset = newContentOffset
+                            }
+                            
+                            self.showLog("Restoring contentOffset to: \(self._startingContentOffset)")
+                        }
+                    }
+                    
+                    superScrollView = scrollView.superviewOfClassType(UIScrollView.self) as? UIScrollView
+                }
+            })
+        }
+        
+        restorePosition()
+        
+        //Reset all values
+        _lastScrollView = nil
+        _kbFrame = CGRect.zero
+        _startingContentInsets = UIEdgeInsets()
+        _startingScrollIndicatorInsets = UIEdgeInsets()
+        _startingContentOffset = CGPoint.zero
+        //    topViewBeginRect = CGRectZero    //Commented due to #82
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+
+    @objc internal func keyboardDidHide(_ notification: Notification) {
+
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+        
+        _topViewBeginOrigin = IQKeyboardManager.kIQCGPointInvalid
+        
+        _kbFrame = CGRect.zero
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+    
+    ///-------------------------------------------
+    /// MARK: UITextField/UITextView Notifications
+    ///-------------------------------------------
+
+    /**  UITextFieldTextDidBeginEditingNotification, UITextViewTextDidBeginEditingNotification. Fetching UITextFieldView object. */
+    @objc internal func textFieldViewDidBeginEditing(_ notification: Notification) {
+
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+
+        //  Getting object
+        _textFieldView = notification.object as? UIView
+        
+        if overrideKeyboardAppearance == true {
+            if let textInput = _textFieldView as? UITextInput {
+                if textInput.keyboardAppearance != keyboardAppearance {
+                    //Setting textField keyboard appearance and reloading inputViews.
+                    if let textFieldView = _textFieldView as? UITextField {
+                        textFieldView.keyboardAppearance = keyboardAppearance
+                    } else if  let textFieldView = _textFieldView as? UITextView {
+                        textFieldView.keyboardAppearance = keyboardAppearance
+                    }
+                    _textFieldView?.reloadInputViews()
+                }
+            }
+        }
+        
+        //If autoToolbar enable, then add toolbar on all the UITextField/UITextView's if required.
+        if privateIsEnableAutoToolbar() == true {
+
+            //UITextView special case. Keyboard Notification is firing before textView notification so we need to resign it first and then again set it as first responder to add toolbar on it.
+            if let textView = _textFieldView as? UIScrollView, textView.responds(to: #selector(getter: UITextView.isEditable)),
+                textView.inputAccessoryView == nil {
+                
+                UIView.animate(withDuration: 0.00001, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+
+                    self.addToolbarIfRequired()
+                    
+                    }, completion: { (_) -> Void in
+
+                        //On textView toolbar didn't appear on first time, so forcing textView to reload it's inputViews.
+                        textView.reloadInputViews()
+                })
+            } else {
+                //Adding toolbar
+                addToolbarIfRequired()
+            }
+        } else {
+            removeToolbarIfRequired()
+        }
+
+        resignFirstResponderGesture.isEnabled = privateShouldResignOnTouchOutside()
+        _textFieldView?.window?.addGestureRecognizer(resignFirstResponderGesture)    //   (Enhancement ID: #14)
+
+        if privateIsEnabled() == false {
+            restorePosition()
+            _topViewBeginOrigin = IQKeyboardManager.kIQCGPointInvalid
+        } else {
+            if _topViewBeginOrigin.equalTo(IQKeyboardManager.kIQCGPointInvalid) == true {    //  (Bug ID: #5)
+                
+                _rootViewController = _textFieldView?.parentContainerViewController()
+
+                if let controller = _rootViewController {
+                    
+                    if _rootViewControllerWhilePopGestureRecognizerActive == controller {
+                        _topViewBeginOrigin = _topViewBeginOriginWhilePopGestureRecognizerActive
+                    } else {
+                        _topViewBeginOrigin = controller.view.frame.origin
+                    }
+                    
+                    _rootViewControllerWhilePopGestureRecognizerActive = nil
+                    _topViewBeginOriginWhilePopGestureRecognizerActive = IQKeyboardManager.kIQCGPointInvalid
+
+                    self.showLog("Saving \(controller) beginning origin: \(self._topViewBeginOrigin)")
+                }
+            }
+            
+            //If _textFieldView is inside ignored responder then do nothing. (Bug ID: #37, #74, #76)
+            //See notes:- https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html If it is UIAlertView textField then do not affect anything (Bug ID: #70).
+            if _privateIsKeyboardShowing == true,
+                let textFieldView = _textFieldView,
+                textFieldView.isAlertViewTextField() == false {
+                
+                //  keyboard is already showing. adjust position.
+                optimizedAdjustPosition()
+            }
+        }
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+    
+    /**  UITextFieldTextDidEndEditingNotification, UITextViewTextDidEndEditingNotification. Removing fetched object. */
+    @objc internal func textFieldViewDidEndEditing(_ notification: Notification) {
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+
+        //Removing gesture recognizer   (Enhancement ID: #14)
+        _textFieldView?.window?.removeGestureRecognizer(resignFirstResponderGesture)
+        
+        // We check if there's a change in original frame or not.
+        
+        if let textView = _textFieldView as? UIScrollView, textView.responds(to: #selector(getter: UITextView.isEditable)) {
+
+            if isTextViewContentInsetChanged == true {
+                self.isTextViewContentInsetChanged = false
+
+                if textView.contentInset != self.startingTextViewContentInsets {
+                    self.showLog("Restoring textView.contentInset to: \(self.startingTextViewContentInsets)")
+                    
+                    UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                        
+                        //Setting textField to it's initial contentInset
+                        textView.contentInset = self.startingTextViewContentInsets
+                        textView.scrollIndicatorInsets = self.startingTextViewScrollIndicatorInsets
+                        
+                    }, completion: { (_) -> Void in })
+                }
+            }
+        }
+        
+        //Setting object to nil
+        _textFieldView = nil
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+
+    ///---------------------------------------
+    /// MARK: UIStatusBar Notification methods
+    ///---------------------------------------
+    
+    /**  UIApplicationWillChangeStatusBarOrientationNotification. Need to set the textView to it's original position. If any frame changes made. (Bug ID: #92)*/
+    @objc internal func willChangeStatusBarOrientation(_ notification: Notification) {
+
+        let currentStatusBarOrientation : UIInterfaceOrientation
+        #if swift(>=5.1)
+        if #available(iOS 13, *) {
+            currentStatusBarOrientation = keyWindow()?.windowScene?.interfaceOrientation ?? UIInterfaceOrientation.unknown
+        } else {
+            currentStatusBarOrientation = UIApplication.shared.statusBarOrientation
+        }
+        #else
+        currentStatusBarOrientation = UIApplication.shared.statusBarOrientation
+        #endif
+
+        #if swift(>=4.2)
+        let statusBarUserInfoKey    = UIApplication.statusBarOrientationUserInfoKey
+        #else
+        let statusBarUserInfoKey    = UIApplicationStatusBarOrientationUserInfoKey
+        #endif
+
+        guard let statusBarOrientation = notification.userInfo?[statusBarUserInfoKey] as? Int, currentStatusBarOrientation.rawValue != statusBarOrientation else {
+            return
+        }
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+        
+        //If textViewContentInsetChanged is saved then restore it.
+        if let textView = _textFieldView as? UITextView, textView.responds(to: #selector(getter: UITextView.isEditable)) {
+            
+            if isTextViewContentInsetChanged == true {
+
+                self.isTextViewContentInsetChanged = false
+
+                if textView.contentInset != self.startingTextViewContentInsets {
+                    UIView.animate(withDuration: _animationDuration, delay: 0, options: _animationCurve.union(.beginFromCurrentState), animations: { () -> Void in
+                        
+                        self.showLog("Restoring textView.contentInset to: \(self.startingTextViewContentInsets)")
+                        
+                        //Setting textField to it's initial contentInset
+                        textView.contentInset = self.startingTextViewContentInsets
+                        textView.scrollIndicatorInsets = self.startingTextViewScrollIndicatorInsets
+                        
+                    }, completion: { (_) -> Void in })
+                }
+            }
+        }
+
+        restorePosition()
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+    
+    ///------------------
+    /// MARK: AutoToolbar
+    ///------------------
+    
+    /**	Get all UITextField/UITextView siblings of textFieldView. */
+    private func responderViews() -> [UIView]? {
+        
+        var superConsideredView: UIView?
+
+        //If find any consider responderView in it's upper hierarchy then will get deepResponderView.
+        for disabledClass in toolbarPreviousNextAllowedClasses {
+            
+            superConsideredView = _textFieldView?.superviewOfClassType(disabledClass)
+            
+            if superConsideredView != nil {
+                break
+            }
+        }
+    
+    //If there is a superConsideredView in view's hierarchy, then fetching all it's subview that responds. No sorting for superConsideredView, it's by subView position.    (Enhancement ID: #22)
+        if let view = superConsideredView {
+            return view.deepResponderViews()
+        } else {  //Otherwise fetching all the siblings
+            
+            if let textFields = _textFieldView?.responderSiblings() {
+                
+                //Sorting textFields according to behaviour
+                switch toolbarManageBehaviour {
+                    //If autoToolbar behaviour is bySubviews, then returning it.
+                case IQAutoToolbarManageBehaviour.bySubviews:   return textFields
+                    
+                    //If autoToolbar behaviour is by tag, then sorting it according to tag property.
+                case IQAutoToolbarManageBehaviour.byTag:    return textFields.sortedArrayByTag()
+                    
+                    //If autoToolbar behaviour is by tag, then sorting it according to tag property.
+                case IQAutoToolbarManageBehaviour.byPosition:    return textFields.sortedArrayByPosition()
+                }
+            } else {
+                return nil
+            }
+        }
+    }
+    
+    /** Add toolbar if it is required to add on textFields and it's siblings. */
+    private func addToolbarIfRequired() {
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+
+        //	Getting all the sibling textFields.
+        if let siblings = responderViews(), !siblings.isEmpty {
+            
+            showLog("Found \(siblings.count) responder sibling(s)")
+            
+            if let textField = _textFieldView {
+                //Either there is no inputAccessoryView or if accessoryView is not appropriate for current situation(There is Previous/Next/Done toolbar).
+                //setInputAccessoryView: check   (Bug ID: #307)
+                if textField.responds(to: #selector(setter: UITextField.inputAccessoryView)) {
+                    
+                    if textField.inputAccessoryView == nil ||
+                        textField.inputAccessoryView?.tag == IQKeyboardManager.kIQPreviousNextButtonToolbarTag ||
+                        textField.inputAccessoryView?.tag == IQKeyboardManager.kIQDoneButtonToolbarTag {
+                        
+                        let rightConfiguration: IQBarButtonItemConfiguration
+                        
+                        if let doneBarButtonItemImage = toolbarDoneBarButtonItemImage {
+                            rightConfiguration = IQBarButtonItemConfiguration(image: doneBarButtonItemImage, action: #selector(self.doneAction(_:)))
+                        } else if let doneBarButtonItemText = toolbarDoneBarButtonItemText {
+                            rightConfiguration = IQBarButtonItemConfiguration(title: doneBarButtonItemText, action: #selector(self.doneAction(_:)))
+                        } else {
+                            rightConfiguration = IQBarButtonItemConfiguration(barButtonSystemItem: .done, action: #selector(self.doneAction(_:)))
+                        }
+                        rightConfiguration.accessibilityLabel = toolbarDoneBarButtonItemAccessibilityLabel ?? "Done"
+                        
+                        //	If only one object is found, then adding only Done button.
+                        if (siblings.count <= 1 && previousNextDisplayMode == .default) || previousNextDisplayMode == .alwaysHide {
+                            
+                            textField.addKeyboardToolbarWithTarget(target: self, titleText: (shouldShowToolbarPlaceholder ? textField.drawingToolbarPlaceholder: nil), rightBarButtonConfiguration: rightConfiguration, previousBarButtonConfiguration: nil, nextBarButtonConfiguration: nil)
+
+                            textField.inputAccessoryView?.tag = IQKeyboardManager.kIQDoneButtonToolbarTag //  (Bug ID: #78)
+                            
+                        } else if previousNextDisplayMode == .default || previousNextDisplayMode == .alwaysShow {
+                            
+                            let prevConfiguration: IQBarButtonItemConfiguration
+                            
+                            if let doneBarButtonItemImage = toolbarPreviousBarButtonItemImage {
+                                prevConfiguration = IQBarButtonItemConfiguration(image: doneBarButtonItemImage, action: #selector(self.previousAction(_:)))
+                            } else if let doneBarButtonItemText = toolbarPreviousBarButtonItemText {
+                                prevConfiguration = IQBarButtonItemConfiguration(title: doneBarButtonItemText, action: #selector(self.previousAction(_:)))
+                            } else {
+                                prevConfiguration = IQBarButtonItemConfiguration(image: (UIImage.keyboardPreviousImage() ?? UIImage()), action: #selector(self.previousAction(_:)))
+                            }
+                            prevConfiguration.accessibilityLabel = toolbarPreviousBarButtonItemAccessibilityLabel ?? "Previous"
+
+                            let nextConfiguration: IQBarButtonItemConfiguration
+                            
+                            if let doneBarButtonItemImage = toolbarNextBarButtonItemImage {
+                                nextConfiguration = IQBarButtonItemConfiguration(image: doneBarButtonItemImage, action: #selector(self.nextAction(_:)))
+                            } else if let doneBarButtonItemText = toolbarNextBarButtonItemText {
+                                nextConfiguration = IQBarButtonItemConfiguration(title: doneBarButtonItemText, action: #selector(self.nextAction(_:)))
+                            } else {
+                                nextConfiguration = IQBarButtonItemConfiguration(image: (UIImage.keyboardNextImage() ?? UIImage()), action: #selector(self.nextAction(_:)))
+                            }
+                            nextConfiguration.accessibilityLabel = toolbarNextBarButtonItemAccessibilityLabel ?? "Next"
+
+                            textField.addKeyboardToolbarWithTarget(target: self, titleText: (shouldShowToolbarPlaceholder ? textField.drawingToolbarPlaceholder: nil), rightBarButtonConfiguration: rightConfiguration, previousBarButtonConfiguration: prevConfiguration, nextBarButtonConfiguration: nextConfiguration)
+
+                            textField.inputAccessoryView?.tag = IQKeyboardManager.kIQPreviousNextButtonToolbarTag //  (Bug ID: #78)
+                        }
+
+                        let toolbar = textField.keyboardToolbar
+
+                        //Setting toolbar tintColor //  (Enhancement ID: #30)
+                        if shouldToolbarUsesTextFieldTintColor {
+                            toolbar.tintColor = textField.tintColor
+                        } else if let tintColor = toolbarTintColor {
+                            toolbar.tintColor = tintColor
+                        } else {
+                            toolbar.tintColor = nil
+                        }
+
+                        //  Setting toolbar to keyboard.
+                        if let textFieldView = textField as? UITextInput {
+                            
+                            //Bar style according to keyboard appearance
+                            switch textFieldView.keyboardAppearance {
+                                
+                            case .dark?:
+                                toolbar.barStyle = .black
+                                toolbar.barTintColor = nil
+                            default:
+                                toolbar.barStyle = .default
+                                toolbar.barTintColor = toolbarBarTintColor
+                            }
+                        }
+
+                        //Setting toolbar title font.   //  (Enhancement ID: #30)
+                        if shouldShowToolbarPlaceholder == true &&
+                            textField.shouldHideToolbarPlaceholder == false {
+                            
+                            //Updating placeholder font to toolbar.     //(Bug ID: #148, #272)
+                            if toolbar.titleBarButton.title == nil ||
+                                toolbar.titleBarButton.title != textField.drawingToolbarPlaceholder {
+                                toolbar.titleBarButton.title = textField.drawingToolbarPlaceholder
+                            }
+                            
+                            //Setting toolbar title font.   //  (Enhancement ID: #30)
+                            if let font = placeholderFont {
+                                toolbar.titleBarButton.titleFont = font
+                            }
+
+                            //Setting toolbar title color.   //  (Enhancement ID: #880)
+                            if let color = placeholderColor {
+                                toolbar.titleBarButton.titleColor = color
+                            }
+                            
+                            //Setting toolbar button title color.   //  (Enhancement ID: #880)
+                            if let color = placeholderButtonColor {
+                                toolbar.titleBarButton.selectableTitleColor = color
+                            }
+
+                        } else {
+                            
+                            toolbar.titleBarButton.title = nil
+                        }
+                        
+                        //In case of UITableView (Special), the next/previous buttons has to be refreshed everytime.    (Bug ID: #56)
+                        //	If firstTextField, then previous should not be enabled.
+                        if siblings.first == textField {
+                            if siblings.count == 1 {
+                                textField.keyboardToolbar.previousBarButton.isEnabled = false
+                                textField.keyboardToolbar.nextBarButton.isEnabled = false
+                            } else {
+                                textField.keyboardToolbar.previousBarButton.isEnabled = false
+                                textField.keyboardToolbar.nextBarButton.isEnabled = true
+                            }
+                        } else if siblings.last  == textField {   //	If lastTextField then next should not be enaled.
+                            textField.keyboardToolbar.previousBarButton.isEnabled = true
+                            textField.keyboardToolbar.nextBarButton.isEnabled = false
+                        } else {
+                            textField.keyboardToolbar.previousBarButton.isEnabled = true
+                            textField.keyboardToolbar.nextBarButton.isEnabled = true
+                        }
+                    }
+                }
+            }
+        }
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+    
+    /** Remove any toolbar if it is IQToolbar. */
+    private func removeToolbarIfRequired() {    //  (Bug ID: #18)
+        
+        let startTime = CACurrentMediaTime()
+        showLog("****** \(#function) started ******", indentation: 1)
+
+        //	Getting all the sibling textFields.
+        if let siblings = responderViews() {
+            
+            showLog("Found \(siblings.count) responder sibling(s)")
+
+            for view in siblings {
+                
+                if let toolbar = view.inputAccessoryView as? IQToolbar {
+
+                    //setInputAccessoryView: check   (Bug ID: #307)
+                    if view.responds(to: #selector(setter: UITextField.inputAccessoryView)) &&
+                        (toolbar.tag == IQKeyboardManager.kIQDoneButtonToolbarTag || toolbar.tag == IQKeyboardManager.kIQPreviousNextButtonToolbarTag) {
+                        
+                        if let textField = view as? UITextField {
+                            textField.inputAccessoryView = nil
+                        } else if let textView = view as? UITextView {
+                            textView.inputAccessoryView = nil
+                        }
+
+                        view.reloadInputViews()
+                    }
+                }
+            }
+        }
+
+        let elapsedTime = CACurrentMediaTime() - startTime
+        showLog("****** \(#function) ended: \(elapsedTime) seconds ******", indentation: -1)
+    }
+    
+    /**	reloadInputViews to reload toolbar buttons enable/disable state on the fly Enhancement ID #434. */
+    @objc public func reloadInputViews() {
+        
+        //If enabled then adding toolbar.
+        if privateIsEnableAutoToolbar() == true {
+            self.addToolbarIfRequired()
+        } else {
+            self.removeToolbarIfRequired()
+        }
+    }
+    
+    ///------------------------------------
+    /// MARK: Debugging & Developer options
+    ///------------------------------------
+    
+    @objc public var enableDebugging = false
+
+    /**
+     @warning Use below methods to completely enable/disable notifications registered by library internally. Please keep in mind that library is totally dependent on NSNotification of UITextField, UITextField, Keyboard etc. If you do unregisterAllNotifications then library will not work at all. You should only use below methods if you want to completedly disable all library functions. You should use below methods at your own risk.
+     */
+    @objc public func registerAllNotifications() {
+
+        #if swift(>=4.2)
+        let UIKeyboardWillShow  = UIResponder.keyboardWillShowNotification
+        let UIKeyboardDidShow   = UIResponder.keyboardDidShowNotification
+        let UIKeyboardWillHide  = UIResponder.keyboardWillHideNotification
+        let UIKeyboardDidHide   = UIResponder.keyboardDidHideNotification
+        
+        let UITextFieldTextDidBeginEditing  = UITextField.textDidBeginEditingNotification
+        let UITextFieldTextDidEndEditing    = UITextField.textDidEndEditingNotification
+        
+        let UITextViewTextDidBeginEditing   = UITextView.textDidBeginEditingNotification
+        let UITextViewTextDidEndEditing     = UITextView.textDidEndEditingNotification
+        
+        let UIApplicationWillChangeStatusBarOrientation = UIApplication.willChangeStatusBarOrientationNotification
+        #else
+        let UIKeyboardWillShow  = Notification.Name.UIKeyboardWillShow
+        let UIKeyboardDidShow   = Notification.Name.UIKeyboardDidShow
+        let UIKeyboardWillHide  = Notification.Name.UIKeyboardWillHide
+        let UIKeyboardDidHide   = Notification.Name.UIKeyboardDidHide
+        
+        let UITextFieldTextDidBeginEditing  = Notification.Name.UITextFieldTextDidBeginEditing
+        let UITextFieldTextDidEndEditing    = Notification.Name.UITextFieldTextDidEndEditing
+        
+        let UITextViewTextDidBeginEditing   = Notification.Name.UITextViewTextDidBeginEditing
+        let UITextViewTextDidEndEditing     = Notification.Name.UITextViewTextDidEndEditing
+        
+        let UIApplicationWillChangeStatusBarOrientation = Notification.Name.UIApplicationWillChangeStatusBarOrientation
+        #endif
+
+        //  Registering for keyboard notification.
+        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow(_:)), name: UIKeyboardWillShow, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardDidShow(_:)), name: UIKeyboardDidShow, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide(_:)), name: UIKeyboardWillHide, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardDidHide(_:)), name: UIKeyboardDidHide, object: nil)
+        
+        //  Registering for UITextField notification.
+        registerTextFieldViewClass(UITextField.self, didBeginEditingNotificationName: UITextFieldTextDidBeginEditing.rawValue, didEndEditingNotificationName: UITextFieldTextDidEndEditing.rawValue)
+        
+        //  Registering for UITextView notification.
+        registerTextFieldViewClass(UITextView.self, didBeginEditingNotificationName: UITextViewTextDidBeginEditing.rawValue, didEndEditingNotificationName: UITextViewTextDidEndEditing.rawValue)
+        
+        //  Registering for orientation changes notification
+        NotificationCenter.default.addObserver(self, selector: #selector(self.willChangeStatusBarOrientation(_:)), name: UIApplicationWillChangeStatusBarOrientation, object: UIApplication.shared)
+    }
+
+    @objc public func unregisterAllNotifications() {
+        
+        #if swift(>=4.2)
+        let UIKeyboardWillShow  = UIResponder.keyboardWillShowNotification
+        let UIKeyboardDidShow   = UIResponder.keyboardDidShowNotification
+        let UIKeyboardWillHide  = UIResponder.keyboardWillHideNotification
+        let UIKeyboardDidHide   = UIResponder.keyboardDidHideNotification
+        
+        let UITextFieldTextDidBeginEditing  = UITextField.textDidBeginEditingNotification
+        let UITextFieldTextDidEndEditing    = UITextField.textDidEndEditingNotification
+        
+        let UITextViewTextDidBeginEditing   = UITextView.textDidBeginEditingNotification
+        let UITextViewTextDidEndEditing     = UITextView.textDidEndEditingNotification
+        
+        let UIApplicationWillChangeStatusBarOrientation = UIApplication.willChangeStatusBarOrientationNotification
+        #else
+        let UIKeyboardWillShow  = Notification.Name.UIKeyboardWillShow
+        let UIKeyboardDidShow   = Notification.Name.UIKeyboardDidShow
+        let UIKeyboardWillHide  = Notification.Name.UIKeyboardWillHide
+        let UIKeyboardDidHide   = Notification.Name.UIKeyboardDidHide
+        
+        let UITextFieldTextDidBeginEditing  = Notification.Name.UITextFieldTextDidBeginEditing
+        let UITextFieldTextDidEndEditing    = Notification.Name.UITextFieldTextDidEndEditing
+        
+        let UITextViewTextDidBeginEditing   = Notification.Name.UITextViewTextDidBeginEditing
+        let UITextViewTextDidEndEditing     = Notification.Name.UITextViewTextDidEndEditing
+        
+        let UIApplicationWillChangeStatusBarOrientation = Notification.Name.UIApplicationWillChangeStatusBarOrientation
+        #endif
+
+        //  Unregistering for keyboard notification.
+        NotificationCenter.default.removeObserver(self, name: UIKeyboardWillShow, object: nil)
+        NotificationCenter.default.removeObserver(self, name: UIKeyboardDidShow, object: nil)
+        NotificationCenter.default.removeObserver(self, name: UIKeyboardWillHide, object: nil)
+        NotificationCenter.default.removeObserver(self, name: UIKeyboardDidHide, object: nil)
+
+        //  Unregistering for UITextField notification.
+        unregisterTextFieldViewClass(UITextField.self, didBeginEditingNotificationName: UITextFieldTextDidBeginEditing.rawValue, didEndEditingNotificationName: UITextFieldTextDidEndEditing.rawValue)
+        
+        //  Unregistering for UITextView notification.
+        unregisterTextFieldViewClass(UITextView.self, didBeginEditingNotificationName: UITextViewTextDidBeginEditing.rawValue, didEndEditingNotificationName: UITextViewTextDidEndEditing.rawValue)
+        
+        //  Unregistering for orientation changes notification
+        NotificationCenter.default.removeObserver(self, name: UIApplicationWillChangeStatusBarOrientation, object: UIApplication.shared)
+    }
+
+    private func showLog(_ logString: String, indentation: Int = 0) {
+        
+        struct Static {
+            static var indentation = 0
+        }
+
+        if indentation < 0 {
+            Static.indentation = max(0, Static.indentation + indentation)
+        }
+
+        if enableDebugging {
+
+            var preLog = "IQKeyboardManager"
+
+            for _ in 0 ... Static.indentation {
+                preLog += "|\t"
+            }
+            print(preLog + logString)
+        }
+
+        if indentation > 0 {
+            Static.indentation += indentation
+        }
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQKeyboardReturnKeyHandler.swift

@@ -0,0 +1,620 @@
+//
+//  IQKeyboardReturnKeyHandler.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+import UIKit
+
+private class IQTextFieldViewInfoModal: NSObject {
+
+    fileprivate weak var textFieldDelegate: UITextFieldDelegate?
+    fileprivate weak var textViewDelegate: UITextViewDelegate?
+    fileprivate weak var textFieldView: UIView?
+    fileprivate var originalReturnKeyType = UIReturnKeyType.default
+    
+    init(textFieldView: UIView?, textFieldDelegate: UITextFieldDelegate?, textViewDelegate: UITextViewDelegate?, originalReturnKeyType: UIReturnKeyType = .default) {
+        self.textFieldView = textFieldView
+        self.textFieldDelegate = textFieldDelegate
+        self.textViewDelegate = textViewDelegate
+        self.originalReturnKeyType = originalReturnKeyType
+    }
+}
+
+/**
+Manages the return key to work like next/done in a view hierarchy.
+*/
+public class IQKeyboardReturnKeyHandler: NSObject, UITextFieldDelegate, UITextViewDelegate {
+
+    ///---------------
+    /// MARK: Settings
+    ///---------------
+    
+    /**
+    Delegate of textField/textView.
+    */
+    @objc public weak var delegate: (UITextFieldDelegate & UITextViewDelegate)?
+    
+    /**
+    Set the last textfield return key type. Default is UIReturnKeyDefault.
+    */
+    @objc public var lastTextFieldReturnKeyType: UIReturnKeyType = UIReturnKeyType.default {
+        
+        didSet {
+            
+            for modal in textFieldInfoCache {
+                
+                if let view = modal.textFieldView {
+                    updateReturnKeyTypeOnTextField(view)
+                }
+            }
+        }
+    }
+    
+    ///--------------------------------------
+    /// MARK: Initialization/Deinitialization
+    ///--------------------------------------
+
+    @objc public override init() {
+        super.init()
+    }
+    
+    /**
+    Add all the textFields available in UIViewController's view.
+    */
+    @objc public init(controller: UIViewController) {
+        super.init()
+        
+        addResponderFromView(controller.view)
+    }
+
+    deinit {
+        
+        for modal in textFieldInfoCache {
+            
+            if let textField = modal.textFieldView as? UITextField {
+                textField.returnKeyType = modal.originalReturnKeyType
+                
+                textField.delegate = modal.textFieldDelegate
+
+            } else if let textView = modal.textFieldView as? UITextView {
+
+                textView.returnKeyType = modal.originalReturnKeyType
+
+                textView.delegate = modal.textViewDelegate
+            }
+        }
+        
+        textFieldInfoCache.removeAll()
+    }
+
+    ///------------------------
+    /// MARK: Private variables
+    ///------------------------
+    private var textFieldInfoCache          =   [IQTextFieldViewInfoModal]()
+    
+    ///------------------------
+    /// MARK: Private Functions
+    ///------------------------
+    private func textFieldViewCachedInfo(_ textField: UIView) -> IQTextFieldViewInfoModal? {
+        
+        for modal in textFieldInfoCache {
+            
+            if let view = modal.textFieldView {
+
+                if view == textField {
+                    return modal
+                }
+            }
+        }
+        
+        return nil
+    }
+
+    private func updateReturnKeyTypeOnTextField(_ view: UIView) {
+        var superConsideredView: UIView?
+        
+        //If find any consider responderView in it's upper hierarchy then will get deepResponderView. (Bug ID: #347)
+        for disabledClass in IQKeyboardManager.shared.toolbarPreviousNextAllowedClasses {
+            
+            superConsideredView = view.superviewOfClassType(disabledClass)
+            
+            if superConsideredView != nil {
+                break
+            }
+        }
+
+        var textFields = [UIView]()
+        
+        //If there is a tableView in view's hierarchy, then fetching all it's subview that responds.
+        if let unwrappedTableView = superConsideredView {     //   (Enhancement ID: #22)
+            textFields = unwrappedTableView.deepResponderViews()
+        } else {  //Otherwise fetching all the siblings
+            
+            textFields = view.responderSiblings()
+            
+            //Sorting textFields according to behaviour
+            switch IQKeyboardManager.shared.toolbarManageBehaviour {
+                //If needs to sort it by tag
+            case .byTag:        textFields = textFields.sortedArrayByTag()
+                //If needs to sort it by Position
+            case .byPosition:   textFields = textFields.sortedArrayByPosition()
+            default:    break
+            }
+        }
+        
+        if let lastView = textFields.last {
+            
+            if let textField = view as? UITextField {
+                
+                //If it's the last textField in responder view, else next
+                textField.returnKeyType = (view == lastView)    ?   lastTextFieldReturnKeyType: UIReturnKeyType.next
+            } else if let textView = view as? UITextView {
+                
+                //If it's the last textField in responder view, else next
+                textView.returnKeyType = (view == lastView)    ?   lastTextFieldReturnKeyType: UIReturnKeyType.next
+            }
+        }
+    }
+
+    ///----------------------------------------------
+    /// MARK: Registering/Unregistering textFieldView
+    ///----------------------------------------------
+
+    /**
+    Should pass UITextField/UITextView intance. Assign textFieldView delegate to self, change it's returnKeyType.
+    
+    @param view UITextField/UITextView object to register.
+    */
+    @objc public func addTextFieldView(_ view: UIView) {
+        
+        let modal = IQTextFieldViewInfoModal(textFieldView: view, textFieldDelegate: nil, textViewDelegate: nil)
+        
+        if let textField = view as? UITextField {
+            
+            modal.originalReturnKeyType = textField.returnKeyType
+            modal.textFieldDelegate = textField.delegate
+            textField.delegate = self
+            
+        } else if let textView = view as? UITextView {
+
+            modal.originalReturnKeyType = textView.returnKeyType
+            modal.textViewDelegate = textView.delegate
+            textView.delegate = self
+        }
+        
+        textFieldInfoCache.append(modal)
+    }
+    
+    /**
+    Should pass UITextField/UITextView intance. Restore it's textFieldView delegate and it's returnKeyType.
+    
+    @param view UITextField/UITextView object to unregister.
+    */
+    @objc public func removeTextFieldView(_ view: UIView) {
+        
+        if let modal = textFieldViewCachedInfo(view) {
+            
+            if let textField = view as? UITextField {
+
+                textField.returnKeyType = modal.originalReturnKeyType
+                textField.delegate = modal.textFieldDelegate
+            } else if let textView = view as? UITextView {
+
+                textView.returnKeyType = modal.originalReturnKeyType
+                textView.delegate = modal.textViewDelegate
+            }
+            
+            if let index = textFieldInfoCache.firstIndex(where: { $0.textFieldView == view}) {
+
+                textFieldInfoCache.remove(at: index)
+            }
+        }
+    }
+    
+    /**
+    Add all the UITextField/UITextView responderView's.
+    
+    @param view UIView object to register all it's responder subviews.
+    */
+    @objc public func addResponderFromView(_ view: UIView) {
+        
+        let textFields = view.deepResponderViews()
+        
+        for textField in textFields {
+            
+            addTextFieldView(textField)
+        }
+    }
+    
+    /**
+    Remove all the UITextField/UITextView responderView's.
+    
+    @param view UIView object to unregister all it's responder subviews.
+    */
+    @objc public func removeResponderFromView(_ view: UIView) {
+        
+        let textFields = view.deepResponderViews()
+        
+        for textField in textFields {
+            
+            removeTextFieldView(textField)
+        }
+    }
+    
+    @discardableResult private func goToNextResponderOrResign(_ view: UIView) -> Bool {
+        
+        var superConsideredView: UIView?
+        
+        //If find any consider responderView in it's upper hierarchy then will get deepResponderView. (Bug ID: #347)
+        for disabledClass in IQKeyboardManager.shared.toolbarPreviousNextAllowedClasses {
+            
+            superConsideredView = view.superviewOfClassType(disabledClass)
+            
+            if superConsideredView != nil {
+                break
+            }
+        }
+        
+        var textFields = [UIView]()
+        
+        //If there is a tableView in view's hierarchy, then fetching all it's subview that responds.
+        if let unwrappedTableView = superConsideredView {     //   (Enhancement ID: #22)
+            textFields = unwrappedTableView.deepResponderViews()
+        } else {  //Otherwise fetching all the siblings
+            
+            textFields = view.responderSiblings()
+            
+            //Sorting textFields according to behaviour
+            switch IQKeyboardManager.shared.toolbarManageBehaviour {
+                //If needs to sort it by tag
+            case .byTag:        textFields = textFields.sortedArrayByTag()
+                //If needs to sort it by Position
+            case .byPosition:   textFields = textFields.sortedArrayByPosition()
+            default:
+                break
+            }
+        }
+
+        //Getting index of current textField.
+        if let index = textFields.firstIndex(of: view) {
+            //If it is not last textField. then it's next object becomeFirstResponder.
+            if index < (textFields.count - 1) {
+                
+                let nextTextField = textFields[index+1]
+                nextTextField.becomeFirstResponder()
+                return false
+            } else {
+                
+                view.resignFirstResponder()
+                return true
+            }
+        } else {
+            return true
+        }
+    }
+
+    ///---------------------------------------
+    /// MARK: UITextField/UITextView delegates
+    ///---------------------------------------
+    
+    @objc public func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textField)?.textFieldDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextFieldDelegate.textFieldShouldBeginEditing(_:))) {
+                    return unwrapDelegate.textFieldShouldBeginEditing?(textField) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @objc public func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textField)?.textFieldDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextFieldDelegate.textFieldShouldEndEditing(_:))) {
+                    return unwrapDelegate.textFieldShouldEndEditing?(textField) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @objc public func textFieldDidBeginEditing(_ textField: UITextField) {
+        updateReturnKeyTypeOnTextField(textField)
+        
+        var aDelegate: UITextFieldDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textField) {
+                aDelegate = modal.textFieldDelegate
+            }
+        }
+        
+        aDelegate?.textFieldDidBeginEditing?(textField)
+    }
+    
+    @objc public func textFieldDidEndEditing(_ textField: UITextField) {
+        
+        var aDelegate: UITextFieldDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textField) {
+                aDelegate = modal.textFieldDelegate
+            }
+        }
+        
+        aDelegate?.textFieldDidEndEditing?(textField)
+    }
+    
+    #if swift(>=4.2)
+    @available(iOS 10.0, *)
+    @objc public func textFieldDidEndEditing(_ textField: UITextField, reason: UITextField.DidEndEditingReason) {
+        
+        var aDelegate: UITextFieldDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textField) {
+                aDelegate = modal.textFieldDelegate
+            }
+        }
+        
+        aDelegate?.textFieldDidEndEditing?(textField, reason: reason)
+    }
+    #else
+    @available(iOS 10.0, *)
+    @objc public func textFieldDidEndEditing(_ textField: UITextField, reason: UITextFieldDidEndEditingReason) {
+
+        var aDelegate: UITextFieldDelegate? = delegate
+    
+        if aDelegate == nil {
+    
+            if let modal = textFieldViewCachedInfo(textField) {
+                aDelegate = modal.textFieldDelegate
+            }
+        }
+    
+        aDelegate?.textFieldDidEndEditing?(textField, reason: reason)
+    }
+    #endif
+
+    @objc public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textField)?.textFieldDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextFieldDelegate.textField(_:shouldChangeCharactersIn:replacementString:))) {
+                    return unwrapDelegate.textField?(textField, shouldChangeCharactersIn: range, replacementString: string) == true
+                }
+            }
+        }
+        return true
+    }
+    
+    @objc public func textFieldShouldClear(_ textField: UITextField) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textField)?.textFieldDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextFieldDelegate.textFieldShouldClear(_:))) {
+                    return unwrapDelegate.textFieldShouldClear?(textField) == true
+                }
+            }
+        }
+
+        return true
+    }
+
+    @objc public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
+        
+        var shouldReturn = true
+
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textField)?.textFieldDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextFieldDelegate.textFieldShouldReturn(_:))) {
+                    shouldReturn = unwrapDelegate.textFieldShouldReturn?(textField) == true
+                }
+            }
+        }
+
+        if shouldReturn == true {
+            goToNextResponderOrResign(textField)
+            return true
+        } else {
+            return goToNextResponderOrResign(textField)
+        }
+    }
+
+    @objc public func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextViewDelegate.textViewShouldBeginEditing(_:))) {
+                    return unwrapDelegate.textViewShouldBeginEditing?(textView) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @objc public func textViewShouldEndEditing(_ textView: UITextView) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextViewDelegate.textViewShouldEndEditing(_:))) {
+                    return unwrapDelegate.textViewShouldEndEditing?(textView) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @objc public func textViewDidBeginEditing(_ textView: UITextView) {
+        updateReturnKeyTypeOnTextField(textView)
+        
+        var aDelegate: UITextViewDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textView) {
+                aDelegate = modal.textViewDelegate
+            }
+        }
+        
+        aDelegate?.textViewDidBeginEditing?(textView)
+    }
+    
+    @objc public func textViewDidEndEditing(_ textView: UITextView) {
+        
+        var aDelegate: UITextViewDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textView) {
+                aDelegate = modal.textViewDelegate
+            }
+        }
+        
+        aDelegate?.textViewDidEndEditing?(textView)
+    }
+    
+    @objc public func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
+        
+        var shouldReturn = true
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(textView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(UITextViewDelegate.textView(_:shouldChangeTextIn:replacementText:))) {
+                    shouldReturn = (unwrapDelegate.textView?(textView, shouldChangeTextIn: range, replacementText: text)) == true
+                }
+            }
+        }
+        
+        if shouldReturn == true && text == "\n" {
+            shouldReturn = goToNextResponderOrResign(textView)
+        }
+        
+        return shouldReturn
+    }
+    
+    @objc public func textViewDidChange(_ textView: UITextView) {
+        
+        var aDelegate: UITextViewDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textView) {
+                aDelegate = modal.textViewDelegate
+            }
+        }
+        
+        aDelegate?.textViewDidChange?(textView)
+    }
+    
+    @objc public func textViewDidChangeSelection(_ textView: UITextView) {
+        
+        var aDelegate: UITextViewDelegate? = delegate
+        
+        if aDelegate == nil {
+            
+            if let modal = textFieldViewCachedInfo(textView) {
+                aDelegate = modal.textViewDelegate
+            }
+        }
+        
+        aDelegate?.textViewDidChangeSelection?(textView)
+    }
+    
+    @available(iOS 10.0, *)
+    @objc public func textView(_ aTextView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(aTextView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(textView as (UITextView, URL, NSRange, UITextItemInteraction) -> Bool)) {
+                    return unwrapDelegate.textView?(aTextView, shouldInteractWith: URL, in: characterRange, interaction: interaction) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @available(iOS 10.0, *)
+    @objc public func textView(_ aTextView: UITextView, shouldInteractWith textAttachment: NSTextAttachment, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(aTextView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(textView as (UITextView, NSTextAttachment, NSRange, UITextItemInteraction) -> Bool)) {
+                    return unwrapDelegate.textView?(aTextView, shouldInteractWith: textAttachment, in: characterRange, interaction: interaction) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @available(iOS, deprecated: 10.0)
+    @objc public func textView(_ aTextView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(aTextView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(textView as (UITextView, URL, NSRange) -> Bool)) {
+                    return unwrapDelegate.textView?(aTextView, shouldInteractWith: URL, in: characterRange) == true
+                }
+            }
+        }
+        
+        return true
+    }
+    
+    @available(iOS, deprecated: 10.0)
+    @objc public func textView(_ aTextView: UITextView, shouldInteractWith textAttachment: NSTextAttachment, in characterRange: NSRange) -> Bool {
+        
+        if delegate == nil {
+            
+            if let unwrapDelegate = textFieldViewCachedInfo(aTextView)?.textViewDelegate {
+                if unwrapDelegate.responds(to: #selector(textView as (UITextView, NSTextAttachment, NSRange) -> Bool)) {
+                    return unwrapDelegate.textView?(aTextView, shouldInteractWith: textAttachment, in: characterRange) == true
+                }
+            }
+        }
+        
+        return true
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQTextView/IQTextView.swift

@@ -0,0 +1,230 @@
+//
+//  IQTextView.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+
+/** @abstract UITextView with placeholder support   */
+open class IQTextView: UITextView {
+    
+    @objc required public init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+        
+        #if swift(>=4.2)
+        let UITextViewTextDidChange = UITextView.textDidChangeNotification
+        #else
+        let UITextViewTextDidChange = Notification.Name.UITextViewTextDidChange
+        #endif
+
+        NotificationCenter.default.addObserver(self, selector: #selector(self.refreshPlaceholder), name: UITextViewTextDidChange, object: self)
+    }
+    
+    @objc override public init(frame: CGRect, textContainer: NSTextContainer?) {
+        super.init(frame: frame, textContainer: textContainer)
+
+        #if swift(>=4.2)
+        let notificationName = UITextView.textDidChangeNotification
+        #else
+        let notificationName = Notification.Name.UITextViewTextDidChange
+        #endif
+
+        NotificationCenter.default.addObserver(self, selector: #selector(self.refreshPlaceholder), name: notificationName, object: self)
+    }
+    
+    @objc override open func awakeFromNib() {
+        super.awakeFromNib()
+        
+        #if swift(>=4.2)
+        let UITextViewTextDidChange = UITextView.textDidChangeNotification
+        #else
+        let UITextViewTextDidChange = Notification.Name.UITextViewTextDidChange
+        #endif
+
+        NotificationCenter.default.addObserver(self, selector: #selector(self.refreshPlaceholder), name: UITextViewTextDidChange, object: self)
+    }
+    
+    deinit {
+        IQ_PlaceholderLabel.removeFromSuperview()
+        NotificationCenter.default.removeObserver(self)
+    }
+
+    private var placeholderInsets: UIEdgeInsets {
+        return UIEdgeInsets(top: self.textContainerInset.top, left: self.textContainerInset.left + self.textContainer.lineFragmentPadding, bottom: self.textContainerInset.bottom, right: self.textContainerInset.right + self.textContainer.lineFragmentPadding)
+    }
+    
+    private var placeholderExpectedFrame: CGRect {
+        let placeholderInsets = self.placeholderInsets
+        let maxWidth = self.frame.width-placeholderInsets.left-placeholderInsets.right
+        let expectedSize = IQ_PlaceholderLabel.sizeThatFits(CGSize(width: maxWidth, height: self.frame.height-placeholderInsets.top-placeholderInsets.bottom))
+        
+        return CGRect(x: placeholderInsets.left, y: placeholderInsets.top, width: maxWidth, height: expectedSize.height)
+    }
+
+    lazy var IQ_PlaceholderLabel: UILabel = {
+        let label = UILabel()
+        
+        label.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        label.lineBreakMode = .byWordWrapping
+        label.numberOfLines = 0
+        label.font = self.font
+        label.textAlignment = self.textAlignment
+        label.backgroundColor = UIColor.clear
+        #if swift(>=5.1)
+        label.textColor = UIColor.systemGray
+        #else
+        label.textColor = UIColor.lightText
+        #endif
+        label.alpha = 0
+        self.addSubview(label)
+        
+        return label
+    }()
+    
+    /** @abstract To set textView's placeholder text color. */
+    @IBInspectable open var placeholderTextColor: UIColor? {
+        
+        get {
+            return IQ_PlaceholderLabel.textColor
+        }
+        
+        set {
+            IQ_PlaceholderLabel.textColor = newValue
+        }
+    }
+    
+    /** @abstract To set textView's placeholder text. Default is nil.    */
+    @IBInspectable open var placeholder: String? {
+        
+        get {
+            return IQ_PlaceholderLabel.text
+        }
+        
+        set {
+            IQ_PlaceholderLabel.text = newValue
+            refreshPlaceholder()
+        }
+    }
+
+    /** @abstract To set textView's placeholder attributed text. Default is nil.    */
+    open var attributedPlaceholder: NSAttributedString? {
+        get {
+            return IQ_PlaceholderLabel.attributedText
+        }
+
+        set {
+            IQ_PlaceholderLabel.attributedText = newValue
+            refreshPlaceholder()
+        }
+    }
+    
+    @objc override open func layoutSubviews() {
+        super.layoutSubviews()
+        
+        IQ_PlaceholderLabel.frame = placeholderExpectedFrame
+    }
+    
+    @objc internal func refreshPlaceholder() {
+        
+        if !text.isEmpty || !attributedText.string.isEmpty {
+            IQ_PlaceholderLabel.alpha = 0
+        } else {
+            IQ_PlaceholderLabel.alpha = 1
+        }
+    }
+    
+    @objc override open var text: String! {
+        
+        didSet {
+            refreshPlaceholder()
+        }
+    }
+    
+    open override var attributedText: NSAttributedString! {
+        
+        didSet {
+            refreshPlaceholder()
+        }
+    }
+    
+    @objc override open var font: UIFont? {
+        
+        didSet {
+            
+            if let unwrappedFont = font {
+                IQ_PlaceholderLabel.font = unwrappedFont
+            } else {
+                IQ_PlaceholderLabel.font = UIFont.systemFont(ofSize: 12)
+            }
+        }
+    }
+    
+    @objc override open var textAlignment: NSTextAlignment {
+        didSet {
+            IQ_PlaceholderLabel.textAlignment = textAlignment
+        }
+    }
+
+    @objc override weak open var delegate: UITextViewDelegate? {
+        
+        get {
+            refreshPlaceholder()
+            return super.delegate
+        }
+        
+        set {
+            super.delegate = newValue
+        }
+    }
+    
+    @objc override open var intrinsicContentSize: CGSize {
+        guard !hasText else {
+            return super.intrinsicContentSize
+        }
+        
+        var newSize = super.intrinsicContentSize
+        let placeholderInsets = self.placeholderInsets
+        newSize.height = placeholderExpectedFrame.height + placeholderInsets.top + placeholderInsets.bottom
+        
+        return newSize
+    }
+}
+
+//#if swift(>=5.1)
+//import SwiftUI
+//
+//struct IQTextViewSwiftUI: UIViewRepresentable {
+//    func makeUIView(context: Context) -> IQTextView {
+//        IQTextView(frame: .zero)
+//    }
+//
+//    func updateUIView(_ view: IQTextView, context: Context) {
+//    }
+//}
+//
+//struct IQTextViewSwiftUI_Preview: PreviewProvider {
+//    static var previews: some View {
+//        IQTextViewSwiftUI()
+//    }
+//}
+//
+//#endif
+//

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQToolbar/IQBarButtonItem.swift

@@ -0,0 +1,134 @@
+//
+//  IQBarButtonItem.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+import Foundation
+
+open class IQBarButtonItem: UIBarButtonItem {
+
+    private static var _classInitialize: Void = classInitialize()
+
+    @objc public override init() {
+        _ = IQBarButtonItem._classInitialize
+          super.init()
+      }
+
+    @objc public required init?(coder aDecoder: NSCoder) {
+        _ = IQBarButtonItem._classInitialize
+           super.init(coder: aDecoder)
+       }
+
+    private class func classInitialize() {
+
+        let  appearanceProxy = self.appearance()
+
+        #if swift(>=4.2)
+        let states: [UIControl.State]
+        #else
+        let states: [UIControlState]
+        #endif
+
+        states = [.normal, .highlighted, .disabled, .selected, .application, .reserved]
+
+        for state in states {
+
+            appearanceProxy.setBackgroundImage(nil, for: state, barMetrics: .default)
+            appearanceProxy.setBackgroundImage(nil, for: state, style: .done, barMetrics: .default)
+            appearanceProxy.setBackgroundImage(nil, for: state, style: .plain, barMetrics: .default)
+            appearanceProxy.setBackButtonBackgroundImage(nil, for: state, barMetrics: .default)
+        }
+        
+        appearanceProxy.setTitlePositionAdjustment(UIOffset(), for: .default)
+        appearanceProxy.setBackgroundVerticalPositionAdjustment(0, for: .default)
+        appearanceProxy.setBackButtonBackgroundVerticalPositionAdjustment(0, for: .default)
+    }
+    
+    @objc override open var tintColor: UIColor? {
+        didSet {
+
+            #if swift(>=4.2)
+            var textAttributes = [NSAttributedString.Key: Any]()
+            let foregroundColorKey = NSAttributedString.Key.foregroundColor
+            #elseif swift(>=4)
+            var textAttributes = [NSAttributedStringKey: Any]()
+            let foregroundColorKey = NSAttributedStringKey.foregroundColor
+            #else
+            var textAttributes = [String: Any]()
+            let foregroundColorKey = NSForegroundColorAttributeName
+            #endif
+
+            textAttributes[foregroundColorKey] = tintColor
+
+            #if swift(>=4)
+
+                if let attributes = titleTextAttributes(for: .normal) {
+                    
+                    for (key, value) in attributes {
+                        #if swift(>=4.2)
+                        textAttributes[key] = value
+                        #else
+                        textAttributes[NSAttributedStringKey.init(key)] = value
+                        #endif
+                    }
+                }
+
+            #else
+
+                if let attributes = titleTextAttributes(for: .normal) {
+                    textAttributes = attributes
+                }
+            #endif
+
+            setTitleTextAttributes(textAttributes, for: .normal)
+        }
+    }
+
+    /**
+     Boolean to know if it's a system item or custom item, we are having a limitation that we cannot override a designated initializer, so we are manually setting this property once in initialization
+     */
+    @objc internal var isSystemItem = false
+    
+    /**
+     Additional target & action to do get callback action. Note that setting custom target & selector doesn't affect native functionality, this is just an additional target to get a callback.
+     
+     @param target Target object.
+     @param action Target Selector.
+     */
+    @objc open func setTarget(_ target: AnyObject?, action: Selector?) {
+        if let target = target, let action = action {
+            invocation = IQInvocation(target, action)
+        } else {
+            invocation = nil
+        }
+    }
+    
+    /**
+     Customized Invocation to be called when button is pressed. invocation is internally created using setTarget:action: method.
+     */
+    @objc open var invocation: IQInvocation?
+    
+    deinit {
+        target = nil
+        invocation = nil
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQToolbar/IQInvocation.swift

@@ -0,0 +1,44 @@
+//
+//  IQInvocation.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+
+@objc public class IQInvocation: NSObject {
+    @objc public weak var target: AnyObject?
+    @objc public var action: Selector
+    
+    @objc public init(_ target: AnyObject, _ action: Selector) {
+        self.target = target
+        self.action = action
+    }
+    
+    @objc public func invoke(from: Any) {
+        if let target = target {
+            UIApplication.shared.sendAction(action, to: target, from: from, for: UIEvent())
+        }
+    }
+
+    deinit {
+        target = nil
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQToolbar/IQPreviousNextView.swift

@@ -0,0 +1,49 @@
+//
+// IQPreviousNextView.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+
+@objc public class IQPreviousNextView: UIView {
+
+}
+
+//#if swift(>=5.1)
+//import SwiftUI
+//
+//struct IQPreviousNextViewSwiftUI: UIViewRepresentable {
+//    func makeUIView(context: Context) -> IQPreviousNextView {
+//        IQPreviousNextView(frame: .zero)
+//    }
+//
+//    func updateUIView(_ view: IQPreviousNextView, context: Context) {
+//    }
+//}
+//
+//struct IQTextViewSwiftUI_Preview: PreviewProvider {
+//    static var previews: some View {
+//        IQPreviousNextViewSwiftUI()
+//    }
+//}
+//
+//#endif
+

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQToolbar/IQTitleBarButtonItem.swift

@@ -0,0 +1,180 @@
+//
+//  IQTitleBarButtonItem.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import Foundation
+import UIKit
+
+open class IQTitleBarButtonItem: IQBarButtonItem {
+   
+    @objc open var titleFont: UIFont? {
+    
+        didSet {
+            if let unwrappedFont = titleFont {
+                titleButton?.titleLabel?.font = unwrappedFont
+            } else {
+                titleButton?.titleLabel?.font = UIFont.systemFont(ofSize: 13)
+            }
+        }
+    }
+
+    @objc override open var title: String? {
+        didSet {
+                titleButton?.setTitle(title, for: .normal)
+        }
+    }
+    
+    /**
+     titleColor to be used for displaying button text when displaying title (disabled state).
+     */
+    @objc open var titleColor: UIColor? {
+
+        didSet {
+            
+            if let color = titleColor {
+                titleButton?.setTitleColor(color, for: .disabled)
+            } else {
+                titleButton?.setTitleColor(UIColor.lightGray, for: .disabled)
+            }
+        }
+    }
+    
+    /**
+     selectableTitleColor to be used for displaying button text when button is enabled.
+     */
+    @objc open var selectableTitleColor: UIColor? {
+        
+        didSet {
+            
+            if let color = selectableTitleColor {
+                titleButton?.setTitleColor(color, for: .normal)
+            } else {
+                #if swift(>=5.1)
+                titleButton?.setTitleColor(UIColor.systemBlue, for: .normal)
+                #else
+                titleButton?.setTitleColor(UIColor(red: 0.0, green: 0.5, blue: 1.0, alpha: 1), for: .normal)
+                #endif
+            }
+        }
+    }
+
+    /**
+     Customized Invocation to be called on title button action. titleInvocation is internally created using setTitleTarget:action: method.
+     */
+    @objc override open var invocation: IQInvocation? {
+
+        didSet {
+            
+            if let target = invocation?.target, let action = invocation?.action {
+                self.isEnabled = true
+                titleButton?.isEnabled = true
+                titleButton?.addTarget(target, action: action, for: .touchUpInside)
+            } else {
+                self.isEnabled = false
+                titleButton?.isEnabled = false
+                titleButton?.removeTarget(nil, action: nil, for: .touchUpInside)
+            }
+        }
+    }
+
+    internal var titleButton: UIButton?
+    private var _titleView: UIView?
+
+    override init() {
+        super.init()
+    }
+    
+    @objc public convenience init(title: String?) {
+
+        self.init(title: nil, style: .plain, target: nil, action: nil)
+        
+        _titleView = UIView()
+        _titleView?.backgroundColor = UIColor.clear
+        
+        titleButton = UIButton(type: .system)
+        titleButton?.isEnabled = false
+        titleButton?.titleLabel?.numberOfLines = 3
+        titleButton?.setTitleColor(UIColor.lightGray, for: .disabled)
+        #if swift(>=5.1)
+        titleButton?.setTitleColor(UIColor.systemBlue, for: .normal)
+        #else
+        titleButton?.setTitleColor(UIColor(red: 0.0, green: 0.5, blue: 1.0, alpha: 1), for: .normal)
+        #endif
+        titleButton?.backgroundColor = UIColor.clear
+        titleButton?.titleLabel?.textAlignment = .center
+        titleButton?.setTitle(title, for: .normal)
+        titleFont = UIFont.systemFont(ofSize: 13.0)
+        titleButton?.titleLabel?.font = self.titleFont
+        _titleView?.addSubview(titleButton!)
+        
+        if #available(iOS 11, *) {
+            
+            var layoutDefaultLowPriority: UILayoutPriority
+            var layoutDefaultHighPriority: UILayoutPriority
+
+            #if swift(>=4.0)
+                let layoutPriorityLowValue = UILayoutPriority.defaultLow.rawValue-1
+                let layoutPriorityHighValue = UILayoutPriority.defaultHigh.rawValue-1
+                layoutDefaultLowPriority = UILayoutPriority(rawValue: layoutPriorityLowValue)
+                layoutDefaultHighPriority = UILayoutPriority(rawValue: layoutPriorityHighValue)
+            #else
+                layoutDefaultLowPriority = UILayoutPriorityDefaultLow-1
+                layoutDefaultHighPriority = UILayoutPriorityDefaultHigh-1
+            #endif
+            
+            _titleView?.translatesAutoresizingMaskIntoConstraints = false
+            _titleView?.setContentHuggingPriority(layoutDefaultLowPriority, for: .vertical)
+            _titleView?.setContentHuggingPriority(layoutDefaultLowPriority, for: .horizontal)
+            _titleView?.setContentCompressionResistancePriority(layoutDefaultHighPriority, for: .vertical)
+            _titleView?.setContentCompressionResistancePriority(layoutDefaultHighPriority, for: .horizontal)
+            
+            titleButton?.translatesAutoresizingMaskIntoConstraints = false
+            titleButton?.setContentHuggingPriority(layoutDefaultLowPriority, for: .vertical)
+            titleButton?.setContentHuggingPriority(layoutDefaultLowPriority, for: .horizontal)
+            titleButton?.setContentCompressionResistancePriority(layoutDefaultHighPriority, for: .vertical)
+            titleButton?.setContentCompressionResistancePriority(layoutDefaultHighPriority, for: .horizontal)
+
+            let top = NSLayoutConstraint.init(item: titleButton!, attribute: .top, relatedBy: .equal, toItem: _titleView, attribute: .top, multiplier: 1, constant: 0)
+            let bottom = NSLayoutConstraint.init(item: titleButton!, attribute: .bottom, relatedBy: .equal, toItem: _titleView, attribute: .bottom, multiplier: 1, constant: 0)
+            let leading = NSLayoutConstraint.init(item: titleButton!, attribute: .leading, relatedBy: .equal, toItem: _titleView, attribute: .leading, multiplier: 1, constant: 0)
+            let trailing = NSLayoutConstraint.init(item: titleButton!, attribute: .trailing, relatedBy: .equal, toItem: _titleView, attribute: .trailing, multiplier: 1, constant: 0)
+            
+            _titleView?.addConstraints([top, bottom, leading, trailing])
+        } else {
+            _titleView?.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+            titleButton?.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        }
+
+        customView = _titleView
+    }
+
+    @objc required public init?(coder aDecoder: NSCoder) {
+        super.init(coder: aDecoder)
+    }
+    
+    deinit {
+        customView = nil
+        titleButton?.removeTarget(nil, action: nil, for: .touchUpInside)
+        _titleView = nil
+        titleButton = nil
+    }
+}

Pods/IQKeyboardManagerSwift/IQKeyboardManagerSwift/IQToolbar/IQToolbar.swift

@@ -0,0 +1,268 @@
+//
+//  IQToolbar.swift
+// https://github.com/hackiftekhar/IQKeyboardManager
+// Copyright (c) 2013-16 Iftekhar Qurashi.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+import UIKit
+
+/** @abstract   IQToolbar for IQKeyboardManager.    */
+open class IQToolbar: UIToolbar, UIInputViewAudioFeedback {
+
+    private static var _classInitialize: Void = classInitialize()
+    
+    private class func classInitialize() {
+        
+        let  appearanceProxy = self.appearance()
+
+        appearanceProxy.barTintColor = nil
+        
+        let positions: [UIBarPosition] = [.any, .bottom, .top, .topAttached]
+
+        for position in positions {
+
+            appearanceProxy.setBackgroundImage(nil, forToolbarPosition: position, barMetrics: .default)
+            appearanceProxy.setShadowImage(nil, forToolbarPosition: .any)
+        }
+
+        //Background color
+        appearanceProxy.backgroundColor = nil
+    }
+    
+    /**
+     Previous bar button of toolbar.
+     */
+    private var privatePreviousBarButton: IQBarButtonItem?
+    @objc open var previousBarButton: IQBarButtonItem {
+        get {
+            if privatePreviousBarButton == nil {
+                privatePreviousBarButton = IQBarButtonItem(image: nil, style: .plain, target: nil, action: nil)
+            }
+            return privatePreviousBarButton!
+        }
+        
+        set (newValue) {
+            privatePreviousBarButton = newValue
+        }
+    }
+    
+    /**
+     Next bar button of toolbar.
+     */
+    private var privateNextBarButton: IQBarButtonItem?
+    @objc open var nextBarButton: IQBarButtonItem {
+        get {
+            if privateNextBarButton == nil {
+                privateNextBarButton = IQBarButtonItem(image: nil, style: .plain, target: nil, action: nil)
+            }
+            return privateNextBarButton!
+        }
+        
+        set (newValue) {
+            privateNextBarButton = newValue
+        }
+    }
+    
+    /**
+     Title bar button of toolbar.
+     */
+    private var privateTitleBarButton: IQTitleBarButtonItem?
+    @objc open var titleBarButton: IQTitleBarButtonItem {
+        get {
+            if privateTitleBarButton == nil {
+                privateTitleBarButton = IQTitleBarButtonItem(title: nil)
+                privateTitleBarButton?.accessibilityLabel = "Title"
+            }
+            return privateTitleBarButton!
+        }
+        
+        set (newValue) {
+            privateTitleBarButton = newValue
+        }
+    }
+    
+    /**
+     Done bar button of toolbar.
+     */
+    private var privateDoneBarButton: IQBarButtonItem?
+    @objc open var doneBarButton: IQBarButtonItem {
+        get {
+            if privateDoneBarButton == nil {
+                privateDoneBarButton = IQBarButtonItem(title: nil, style: .done, target: nil, action: nil)
+            }
+            return privateDoneBarButton!
+        }
+        
+        set (newValue) {
+            privateDoneBarButton = newValue
+        }
+    }
+
+    /**
+     Fixed space bar button of toolbar.
+     */
+    private var privateFixedSpaceBarButton: IQBarButtonItem?
+    @objc open var fixedSpaceBarButton: IQBarButtonItem {
+        get {
+            if privateFixedSpaceBarButton == nil {
+                privateFixedSpaceBarButton = IQBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
+            }
+            privateFixedSpaceBarButton!.isSystemItem = true
+
+            if #available(iOS 10, *) {
+                privateFixedSpaceBarButton!.width = 6
+            } else {
+                privateFixedSpaceBarButton!.width = 20
+            }
+            
+            return privateFixedSpaceBarButton!
+        }
+        
+        set (newValue) {
+            privateFixedSpaceBarButton = newValue
+        }
+    }
+
+    override init(frame: CGRect) {
+        _ = IQToolbar._classInitialize
+        super.init(frame: frame)
+        
+        sizeToFit()
+        
+        autoresizingMask = .flexibleWidth
+        self.isTranslucent = true
+    }
+    
+    @objc required public init?(coder aDecoder: NSCoder) {
+        _ = IQToolbar._classInitialize
+        super.init(coder: aDecoder)
+
+        sizeToFit()
+
+        autoresizingMask = .flexibleWidth
+        self.isTranslucent = true
+    }
+
+    @objc override open func sizeThatFits(_ size: CGSize) -> CGSize {
+        var sizeThatFit = super.sizeThatFits(size)
+        sizeThatFit.height = 44
+        return sizeThatFit
+    }
+
+    @objc override open var tintColor: UIColor! {
+        
+        didSet {
+            if let unwrappedItems = items {
+                for item in unwrappedItems {
+                    item.tintColor = tintColor
+                }
+            }
+        }
+    }
+    
+    @objc override open func layoutSubviews() {
+
+        super.layoutSubviews()
+
+        if #available(iOS 11, *) {
+            return
+        } else if let customTitleView = titleBarButton.customView {
+            var leftRect = CGRect.null
+            var rightRect = CGRect.null
+            var isTitleBarButtonFound = false
+            
+            let sortedSubviews = self.subviews.sorted(by: { (view1: UIView, view2: UIView) -> Bool in
+                if view1.frame.minX != view2.frame.minX {
+                    return view1.frame.minX < view2.frame.minX
+                } else {
+                    return view1.frame.minY < view2.frame.minY
+                }
+            })
+            
+            for barButtonItemView in sortedSubviews {
+                
+                if isTitleBarButtonFound == true {
+                    rightRect = barButtonItemView.frame
+                    break
+                } else if barButtonItemView === customTitleView {
+                    isTitleBarButtonFound = true
+                    //If it's UIToolbarButton or UIToolbarTextButton (which actually UIBarButtonItem)
+                } else if barButtonItemView.isKind(of: UIControl.self) == true {
+                    leftRect = barButtonItemView.frame
+                }
+            }
+            
+            let titleMargin: CGFloat = 16
+
+            let maxWidth: CGFloat = self.frame.width - titleMargin*2 - (leftRect.isNull ? 0 : leftRect.maxX) - (rightRect.isNull ? 0 : self.frame.width - rightRect.minX)
+            let maxHeight = self.frame.height
+            
+            let sizeThatFits = customTitleView.sizeThatFits(CGSize(width: maxWidth, height: maxHeight))
+            
+            var titleRect: CGRect
+            
+            if sizeThatFits.width > 0 && sizeThatFits.height > 0 {
+                let width = min(sizeThatFits.width, maxWidth)
+                let height = min(sizeThatFits.height, maxHeight)
+                
+                var xPosition: CGFloat
+
+                if leftRect.isNull == false {
+                    xPosition = titleMargin + leftRect.maxX + ((maxWidth - width)/2)
+                } else {
+                    xPosition = titleMargin
+                }
+                
+                let yPosition = (maxHeight - height)/2
+                
+                titleRect = CGRect(x: xPosition, y: yPosition, width: width, height: height)
+            } else {
+                
+                var xPosition: CGFloat
+                
+                if leftRect.isNull == false {
+                    xPosition = titleMargin + leftRect.maxX
+                } else {
+                    xPosition = titleMargin
+                }
+
+                let width: CGFloat = self.frame.width - titleMargin*2 - (leftRect.isNull ? 0 : leftRect.maxX) - (rightRect.isNull ? 0 : self.frame.width - rightRect.minX)
+                
+                titleRect = CGRect(x: xPosition, y: 0, width: width, height: maxHeight)
+            }
+            
+            customTitleView.frame = titleRect
+        }
+    }
+    
+    @objc open var enableInputClicksWhenVisible: Bool {
+        return true
+    }
+    
+    deinit {
+
+        items = nil
+        privatePreviousBarButton = nil
+        privateNextBarButton = nil
+        privateTitleBarButton = nil
+        privateDoneBarButton = nil
+        privateFixedSpaceBarButton = nil
+    }
+}

Pods/IQKeyboardManagerSwift/LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2013-2017 Iftekhar Qurashi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Pods/IQKeyboardManagerSwift/README.md

@@ -0,0 +1,223 @@
+<p align="center">
+  <img src="https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/master/Demo/Resources/icon.png" alt="Icon"/>
+</p>
+<H1 align="center">IQKeyboardManager</H1>
+<p align="center">
+  <img src="https://img.shields.io/github/license/hackiftekhar/IQKeyboardManager.svg"
+  alt="GitHub license"/>
+
+
+[![Build Status](https://travis-ci.org/hackiftekhar/IQKeyboardManager.svg)](https://travis-ci.org/hackiftekhar/IQKeyboardManager)
+
+
+While developing iOS apps, we often run into issues where the iPhone keyboard slides up and covers the `UITextField/UITextView`. `IQKeyboardManager` allows you to prevent this issue of keyboard sliding up and covering `UITextField/UITextView` without needing you to write any code or make any additional setup. To use `IQKeyboardManager` you simply need to add source files to your project.
+
+
+#### Key Features
+
+1) `**CODELESS**, Zero Lines of Code`
+
+2) `Works Automatically`
+
+3) `No More UIScrollView`
+
+4) `No More Subclasses`
+
+5) `No More Manual Work`
+
+6) `No More #imports`
+
+`IQKeyboardManager` works on all orientations, and with the toolbar. It also has nice optional features allowing you to customize the distance from the text field, behaviour of previous, next and done buttons in the keyboard toolbar, play sound when the user navigates through the form and more.
+
+
+## Screenshot
+[![IQKeyboardManager](https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/v3.3.0/Screenshot/IQKeyboardManagerScreenshot.png)](http://youtu.be/6nhLw6hju2A)
+[![Settings](https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/v3.3.0/Screenshot/IQKeyboardManagerSettings.png)](http://youtu.be/6nhLw6hju2A)
+
+## GIF animation
+[![IQKeyboardManager](https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/v3.3.0/Screenshot/IQKeyboardManager.gif)](http://youtu.be/6nhLw6hju2A)
+
+## Video
+
+<a href="http://youtu.be/WAYc2Qj-OQg" target="_blank"><img src="http://img.youtube.com/vi/WAYc2Qj-OQg/0.jpg"
+alt="IQKeyboardManager Demo Video" width="480" height="360" border="10" /></a>
+
+## Tutorial video by @rebeloper ([#1135](https://github.com/hackiftekhar/IQKeyboardManager/issues/1135))
+
+@rebeloper demonstrated two videos on how to implement **IQKeyboardManager** at it's core:
+
+<a href="https://www.youtube.com/playlist?list=PL_csAAO9PQ8aTL87XnueOXi3RpWE2m_8v" target="_blank"><img src="https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/master/Screenshot/ThirdPartyYoutubeTutorial.jpg"
+alt="Youtube Tutorial Playlist"/></a>
+
+https://www.youtube.com/playlist?list=PL_csAAO9PQ8aTL87XnueOXi3RpWE2m_8v
+
+## Warning
+
+- **If you're planning to build SDK/library/framework and want to handle UITextField/UITextView with IQKeyboardManager then you're totally going the wrong way.** I would never suggest to add **IQKeyboardManager** as **dependency/adding/shipping** with any third-party library. Instead of adding **IQKeyboardManager** you should implement your own solution to achieve same kind of results. **IQKeyboardManager** is totally designed for projects to help developers for their convenience, it's not designed for **adding/dependency/shipping** with any **third-party library**, because **doing this could block adoption by other developers for their projects as well (who are not using IQKeyboardManager and have implemented their custom solution to handle UITextField/UITextView in the project).**
+- If **IQKeyboardManager** conflicts with other **third-party library**, then it's **developer responsibility** to **enable/disable IQKeyboardManager** when **presenting/dismissing** third-party library UI. Third-party libraries are not responsible to handle IQKeyboardManager.
+
+## Requirements
+[![Platform iOS](https://img.shields.io/badge/Platform-iOS-blue.svg?style=fla)]()
+
+|                        | Language | Minimum iOS Target | Minimum Xcode Version |
+|------------------------|----------|--------------------|-----------------------|
+| IQKeyboardManager      | Obj-C    | iOS 8.0            | Xcode 9           |
+| IQKeyboardManagerSwift | Swift    | iOS 8.0            | Xcode 9           |
+| Demo Project           |          |                    | Xcode 11             |
+
+#### Swift versions support
+
+| Swift             | Xcode | IQKeyboardManagerSwift |
+|-------------------|-------|------------------------|
+| 5.1, 5.0, 4.2, 4.0, 3.2, 3.0| 11  | >= 6.5.0               |
+| 5.0,4.2, 4.0, 3.2, 3.0| 10.2  | >= 6.2.1               |
+| 4.2, 4.0, 3.2, 3.0| 10.0  | >= 6.0.4               |
+| 4.0, 3.2, 3.0     | 9.0   | 5.0.0                  |
+
+Installation
+==========================
+
+#### Installation with CocoaPods
+
+[![CocoaPods](https://img.shields.io/cocoapods/v/IQKeyboardManager.svg)](http://cocoadocs.org/docsets/IQKeyboardManager)
+
+***IQKeyboardManager (Objective-C):*** IQKeyboardManager is available through [CocoaPods](http://cocoapods.org). To install
+it, simply add the following line to your Podfile: ([#9](https://github.com/hackiftekhar/IQKeyboardManager/issues/9))
+
+```ruby
+pod 'IQKeyboardManager' #iOS8 and later
+```
+
+***IQKeyboardManager (Swift):*** IQKeyboardManagerSwift is available through [CocoaPods](http://cocoapods.org). To install
+it, simply add the following line to your Podfile: ([#236](https://github.com/hackiftekhar/IQKeyboardManager/issues/236))
+
+*Swift 5.1, 5.0, 4.2, 4.0, 3.2, 3.0 (Xcode 11)*
+
+```ruby
+pod 'IQKeyboardManagerSwift'
+```
+
+*Or you can choose the version you need based on Swift support table from [Requirements](README.md#requirements)*
+
+```ruby
+pod 'IQKeyboardManagerSwift', '6.3.0'
+```
+
+In AppDelegate.swift, just import IQKeyboardManagerSwift framework and enable IQKeyboardManager.
+
+```swift
+import IQKeyboardManagerSwift
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+
+      IQKeyboardManager.shared.enable = true
+
+      return true
+    }
+}
+```
+
+#### Installation with Carthage
+
+[Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.
+
+You can install Carthage with [Homebrew](http://brew.sh/) using the following command:
+
+```bash
+$ brew update
+$ brew install carthage
+```
+
+To integrate `IQKeyboardManger` or `IQKeyboardManagerSwift` into your Xcode project using Carthage, add the following line to your `Cartfile`:
+
+```ogdl
+github "hackiftekhar/IQKeyboardManager"
+```
+
+Run `carthage` to build the frameworks and drag the appropriate framework (`IQKeyboardManager.framework` or `IQKeyboardManagerSwift.framework`) into your Xcode project based on your need. Make sure to add only one framework and not both.
+
+
+#### Installation with Source Code
+
+[![Github tag](https://img.shields.io/github/tag/hackiftekhar/iqkeyboardmanager.svg)]()
+
+
+
+***IQKeyboardManager (Objective-C):*** Just ***drag and drop*** `IQKeyboardManager` directory from demo project to your project. That's it.
+
+***IQKeyboardManager (Swift):*** ***Drag and drop*** `IQKeyboardManagerSwift` directory from demo project to your project
+
+In AppDelegate.swift, just enable IQKeyboardManager.
+
+```swift
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+
+      IQKeyboardManager.shared.enable = true
+
+      return true
+    }
+}
+```
+
+#### Installation with Swift Package Manager
+
+[Swift Package Manager(SPM)](https://swift.org/package-manager/) is Apple's dependency manager tool. It is now supported in Xcode 11. So it can be used in all appleOS types of projects. It can be used alongside other tools like CocoaPods and Carthage as well. 
+
+To install IQKeyboardManager package into your packages, add a reference to IQKeyboardManager and a targeting release version in the dependencies section in `Package.swift` file:
+
+```swift
+import PackageDescription
+
+let package = Package(
+    name: "YOUR_PROJECT_NAME",
+    products: [],
+    dependencies: [
+        .package(url: "https://github.com/hackiftekhar/IQKeyboardManager.git", from: "6.5.0")
+    ]
+)
+```
+
+To install IQKeyboardManager package via Xcode
+
+ * Go to File -> Swift Packages -> Add Package Dependency...
+ * Then search for https://github.com/hackiftekhar/IQKeyboardManager.git
+ * And choose the version you want
+
+Migration Guide
+==========================
+- [IQKeyboardManager 6.0.0 Migration Guide](https://github.com/hackiftekhar/IQKeyboardManager/wiki/IQKeyboardManager-6.0.0-Migration-Guide)
+
+Other Links
+==========================
+
+- [Known Issues](https://github.com/hackiftekhar/IQKeyboardManager/wiki/Known-Issues)
+- [Manual Management Tweaks](https://github.com/hackiftekhar/IQKeyboardManager/wiki/Manual-Management)
+- [Properties and functions usage](https://github.com/hackiftekhar/IQKeyboardManager/wiki/Properties-&-Functions)
+
+## Flow Diagram
+[![IQKeyboardManager CFD](https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/master/Screenshot/IQKeyboardManagerFlowDiagram.jpg)](https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/master/Screenshot/IQKeyboardManagerFlowDiagram.jpg)
+
+If you would like to see detailed Flow diagram then check [Detailed Flow Diagram](https://raw.githubusercontent.com/hackiftekhar/IQKeyboardManager/v3.3.0/Screenshot/IQKeyboardManagerCFD.jpg).
+
+
+LICENSE
+---
+Distributed under the MIT License.
+
+Contributions
+---
+Any contribution is more than welcome! You can contribute through pull requests and issues on GitHub.
+
+Author
+---
+If you wish to contact me, email at: hack.iftekhar@gmail.com

Pods/MBProgressHUD/LICENSE

@@ -0,0 +1,19 @@
+Copyright © 2009-2020 Matej Bukovinski
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Pods/MBProgressHUD/MBProgressHUD.h

@@ -0,0 +1,411 @@
+//
+//  MBProgressHUD.h
+//  Version 1.2.0
+//  Created by Matej Bukovinski on 2.4.09.
+//
+
+// This code is distributed under the terms and conditions of the MIT license.
+
+// Copyright © 2009-2016 Matej Bukovinski
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+#import <CoreGraphics/CoreGraphics.h>
+
+@class MBBackgroundView;
+@protocol MBProgressHUDDelegate;
+
+
+extern CGFloat const MBProgressMaxOffset;
+
+typedef NS_ENUM(NSInteger, MBProgressHUDMode) {
+    /// UIActivityIndicatorView.
+    MBProgressHUDModeIndeterminate,
+    /// A round, pie-chart like, progress view.
+    MBProgressHUDModeDeterminate,
+    /// Horizontal progress bar.
+    MBProgressHUDModeDeterminateHorizontalBar,
+    /// Ring-shaped progress view.
+    MBProgressHUDModeAnnularDeterminate,
+    /// Shows a custom view.
+    MBProgressHUDModeCustomView,
+    /// Shows only labels.
+    MBProgressHUDModeText
+};
+
+typedef NS_ENUM(NSInteger, MBProgressHUDAnimation) {
+    /// Opacity animation
+    MBProgressHUDAnimationFade,
+    /// Opacity + scale animation (zoom in when appearing zoom out when disappearing)
+    MBProgressHUDAnimationZoom,
+    /// Opacity + scale animation (zoom out style)
+    MBProgressHUDAnimationZoomOut,
+    /// Opacity + scale animation (zoom in style)
+    MBProgressHUDAnimationZoomIn
+};
+
+typedef NS_ENUM(NSInteger, MBProgressHUDBackgroundStyle) {
+    /// Solid color background
+    MBProgressHUDBackgroundStyleSolidColor,
+    /// UIVisualEffectView or UIToolbar.layer background view
+    MBProgressHUDBackgroundStyleBlur
+};
+
+typedef void (^MBProgressHUDCompletionBlock)(void);
+
+
+NS_ASSUME_NONNULL_BEGIN
+
+
+/**
+ * Displays a simple HUD window containing a progress indicator and two optional labels for short messages.
+ *
+ * This is a simple drop-in class for displaying a progress HUD view similar to Apple's private UIProgressHUD class.
+ * The MBProgressHUD window spans over the entire space given to it by the initWithFrame: constructor and catches all
+ * user input on this region, thereby preventing the user operations on components below the view.
+ *
+ * @note To still allow touches to pass through the HUD, you can set hud.userInteractionEnabled = NO.
+ * @attention MBProgressHUD is a UI class and should therefore only be accessed on the main thread.
+ */
+@interface MBProgressHUD : UIView
+
+/**
+ * Creates a new HUD, adds it to provided view and shows it. The counterpart to this method is hideHUDForView:animated:.
+ *
+ * @note This method sets removeFromSuperViewOnHide. The HUD will automatically be removed from the view hierarchy when hidden.
+ *
+ * @param view The view that the HUD will be added to
+ * @param animated If set to YES the HUD will appear using the current animationType. If set to NO the HUD will not use
+ * animations while appearing.
+ * @return A reference to the created HUD.
+ *
+ * @see hideHUDForView:animated:
+ * @see animationType
+ */
++ (instancetype)showHUDAddedTo:(UIView *)view animated:(BOOL)animated;
+
+/// @name Showing and hiding
+
+/**
+ * Finds the top-most HUD subview that hasn't finished and hides it. The counterpart to this method is showHUDAddedTo:animated:.
+ *
+ * @note This method sets removeFromSuperViewOnHide. The HUD will automatically be removed from the view hierarchy when hidden.
+ *
+ * @param view The view that is going to be searched for a HUD subview.
+ * @param animated If set to YES the HUD will disappear using the current animationType. If set to NO the HUD will not use
+ * animations while disappearing.
+ * @return YES if a HUD was found and removed, NO otherwise.
+ *
+ * @see showHUDAddedTo:animated:
+ * @see animationType
+ */
++ (BOOL)hideHUDForView:(UIView *)view animated:(BOOL)animated;
+
+/**
+ * Finds the top-most HUD subview that hasn't finished and returns it.
+ *
+ * @param view The view that is going to be searched.
+ * @return A reference to the last HUD subview discovered.
+ */
++ (nullable MBProgressHUD *)HUDForView:(UIView *)view NS_SWIFT_NAME(forView(_:));
+
+/**
+ * A convenience constructor that initializes the HUD with the view's bounds. Calls the designated constructor with
+ * view.bounds as the parameter.
+ *
+ * @param view The view instance that will provide the bounds for the HUD. Should be the same instance as
+ * the HUD's superview (i.e., the view that the HUD will be added to).
+ */
+- (instancetype)initWithView:(UIView *)view;
+
+/**
+ * Displays the HUD.
+ *
+ * @note You need to make sure that the main thread completes its run loop soon after this method call so that
+ * the user interface can be updated. Call this method when your task is already set up to be executed in a new thread
+ * (e.g., when using something like NSOperation or making an asynchronous call like NSURLRequest).
+ *
+ * @param animated If set to YES the HUD will appear using the current animationType. If set to NO the HUD will not use
+ * animations while appearing.
+ *
+ * @see animationType
+ */
+- (void)showAnimated:(BOOL)animated;
+
+/**
+ * Hides the HUD. This still calls the hudWasHidden: delegate. This is the counterpart of the show: method. Use it to
+ * hide the HUD when your task completes.
+ *
+ * @param animated If set to YES the HUD will disappear using the current animationType. If set to NO the HUD will not use
+ * animations while disappearing.
+ *
+ * @see animationType
+ */
+- (void)hideAnimated:(BOOL)animated;
+
+/**
+ * Hides the HUD after a delay. This still calls the hudWasHidden: delegate. This is the counterpart of the show: method. Use it to
+ * hide the HUD when your task completes.
+ *
+ * @param animated If set to YES the HUD will disappear using the current animationType. If set to NO the HUD will not use
+ * animations while disappearing.
+ * @param delay Delay in seconds until the HUD is hidden.
+ *
+ * @see animationType
+ */
+- (void)hideAnimated:(BOOL)animated afterDelay:(NSTimeInterval)delay;
+
+/**
+ * The HUD delegate object. Receives HUD state notifications.
+ */
+@property (weak, nonatomic) id<MBProgressHUDDelegate> delegate;
+
+/**
+ * Called after the HUD is hidden.
+ */
+@property (copy, nullable) MBProgressHUDCompletionBlock completionBlock;
+
+/**
+ * Grace period is the time (in seconds) that the invoked method may be run without
+ * showing the HUD. If the task finishes before the grace time runs out, the HUD will
+ * not be shown at all.
+ * This may be used to prevent HUD display for very short tasks.
+ * Defaults to 0 (no grace time).
+ * @note The graceTime needs to be set before the hud is shown. You thus can't use `showHUDAddedTo:animated:`,
+ * but instead need to alloc / init the HUD, configure the grace time and than show it manually.
+ */
+@property (assign, nonatomic) NSTimeInterval graceTime;
+
+/**
+ * The minimum time (in seconds) that the HUD is shown.
+ * This avoids the problem of the HUD being shown and than instantly hidden.
+ * Defaults to 0 (no minimum show time).
+ */
+@property (assign, nonatomic) NSTimeInterval minShowTime;
+
+/**
+ * Removes the HUD from its parent view when hidden.
+ * Defaults to NO.
+ */
+@property (assign, nonatomic) BOOL removeFromSuperViewOnHide;
+
+/// @name Appearance
+
+/**
+ * MBProgressHUD operation mode. The default is MBProgressHUDModeIndeterminate.
+ */
+@property (assign, nonatomic) MBProgressHUDMode mode;
+
+/**
+ * A color that gets forwarded to all labels and supported indicators. Also sets the tintColor
+ * for custom views on iOS 7+. Set to nil to manage color individually.
+ * Defaults to semi-translucent black on iOS 7 and later and white on earlier iOS versions.
+ */
+@property (strong, nonatomic, nullable) UIColor *contentColor UI_APPEARANCE_SELECTOR;
+
+/**
+ * The animation type that should be used when the HUD is shown and hidden.
+ */
+@property (assign, nonatomic) MBProgressHUDAnimation animationType UI_APPEARANCE_SELECTOR;
+
+/**
+ * The bezel offset relative to the center of the view. You can use MBProgressMaxOffset
+ * and -MBProgressMaxOffset to move the HUD all the way to the screen edge in each direction.
+ * E.g., CGPointMake(0.f, MBProgressMaxOffset) would position the HUD centered on the bottom edge.
+ */
+@property (assign, nonatomic) CGPoint offset UI_APPEARANCE_SELECTOR;
+
+/**
+ * The amount of space between the HUD edge and the HUD elements (labels, indicators or custom views).
+ * This also represents the minimum bezel distance to the edge of the HUD view.
+ * Defaults to 20.f
+ */
+@property (assign, nonatomic) CGFloat margin UI_APPEARANCE_SELECTOR;
+
+/**
+ * The minimum size of the HUD bezel. Defaults to CGSizeZero (no minimum size).
+ */
+@property (assign, nonatomic) CGSize minSize UI_APPEARANCE_SELECTOR;
+
+/**
+ * Force the HUD dimensions to be equal if possible.
+ */
+@property (assign, nonatomic, getter = isSquare) BOOL square UI_APPEARANCE_SELECTOR;
+
+/**
+ * When enabled, the bezel center gets slightly affected by the device accelerometer data.
+ * Defaults to NO.
+ *
+ * @note This can cause main thread checker assertions on certain devices. https://github.com/jdg/MBProgressHUD/issues/552
+ */
+@property (assign, nonatomic, getter=areDefaultMotionEffectsEnabled) BOOL defaultMotionEffectsEnabled UI_APPEARANCE_SELECTOR;
+
+/// @name Progress
+
+/**
+ * The progress of the progress indicator, from 0.0 to 1.0. Defaults to 0.0.
+ */
+@property (assign, nonatomic) float progress;
+
+/// @name ProgressObject
+
+/**
+ * The NSProgress object feeding the progress information to the progress indicator.
+ */
+@property (strong, nonatomic, nullable) NSProgress *progressObject;
+
+/// @name Views
+
+/**
+ * The view containing the labels and indicator (or customView).
+ */
+@property (strong, nonatomic, readonly) MBBackgroundView *bezelView;
+
+/**
+ * View covering the entire HUD area, placed behind bezelView.
+ */
+@property (strong, nonatomic, readonly) MBBackgroundView *backgroundView;
+
+/**
+ * The UIView (e.g., a UIImageView) to be shown when the HUD is in MBProgressHUDModeCustomView.
+ * The view should implement intrinsicContentSize for proper sizing. For best results use approximately 37 by 37 pixels.
+ */
+@property (strong, nonatomic, nullable) UIView *customView;
+
+/**
+ * A label that holds an optional short message to be displayed below the activity indicator. The HUD is automatically resized to fit
+ * the entire text.
+ */
+@property (strong, nonatomic, readonly) UILabel *label;
+
+/**
+ * A label that holds an optional details message displayed below the labelText message. The details text can span multiple lines.
+ */
+@property (strong, nonatomic, readonly) UILabel *detailsLabel;
+
+/**
+ * A button that is placed below the labels. Visible only if a target / action is added and a title is assigned..
+ */
+@property (strong, nonatomic, readonly) UIButton *button;
+
+@end
+
+
+@protocol MBProgressHUDDelegate <NSObject>
+
+@optional
+
+/**
+ * Called after the HUD was fully hidden from the screen.
+ */
+- (void)hudWasHidden:(MBProgressHUD *)hud;
+
+@end
+
+
+/**
+ * A progress view for showing definite progress by filling up a circle (pie chart).
+ */
+@interface MBRoundProgressView : UIView
+
+/**
+ * Progress (0.0 to 1.0)
+ */
+@property (nonatomic, assign) float progress;
+
+/**
+ * Indicator progress color.
+ * Defaults to white [UIColor whiteColor].
+ */
+@property (nonatomic, strong) UIColor *progressTintColor;
+
+/**
+ * Indicator background (non-progress) color.
+ * Only applicable on iOS versions older than iOS 7.
+ * Defaults to translucent white (alpha 0.1).
+ */
+@property (nonatomic, strong) UIColor *backgroundTintColor;
+
+/*
+ * Display mode - NO = round or YES = annular. Defaults to round.
+ */
+@property (nonatomic, assign, getter = isAnnular) BOOL annular;
+
+@end
+
+
+/**
+ * A flat bar progress view.
+ */
+@interface MBBarProgressView : UIView
+
+/**
+ * Progress (0.0 to 1.0)
+ */
+@property (nonatomic, assign) float progress;
+
+/**
+ * Bar border line color.
+ * Defaults to white [UIColor whiteColor].
+ */
+@property (nonatomic, strong) UIColor *lineColor;
+
+/**
+ * Bar background color.
+ * Defaults to clear [UIColor clearColor];
+ */
+@property (nonatomic, strong) UIColor *progressRemainingColor;
+
+/**
+ * Bar progress color.
+ * Defaults to white [UIColor whiteColor].
+ */
+@property (nonatomic, strong) UIColor *progressColor;
+
+@end
+
+
+@interface MBBackgroundView : UIView
+
+/**
+ * The background style.
+ * Defaults to MBProgressHUDBackgroundStyleBlur.
+ */
+@property (nonatomic) MBProgressHUDBackgroundStyle style;
+
+/**
+ * The blur effect style, when using MBProgressHUDBackgroundStyleBlur.
+ * Defaults to UIBlurEffectStyleLight.
+ */
+@property (nonatomic) UIBlurEffectStyle blurEffectStyle;
+
+/**
+ * The background color or the blur tint color.
+ *
+ * Defaults to nil on iOS 13 and later and
+ * `[UIColor colorWithWhite:0.8f alpha:0.6f]`
+ * on older systems.
+ */
+@property (nonatomic, strong, nullable) UIColor *color;
+
+@end
+
+NS_ASSUME_NONNULL_END