0.0.2

yinqiaojuan
1 parent bd62e535
Showing 16 changed files with 4810 additions and 6 deletions
CNLivePublishContent.podspec
Example/CNLivePublishContent.xcodeproj/project.pbxproj
Example/Podfile
Example/Podfile.lock
Example/Pods/AFNetworking/AFNetworking/AFCompatibilityMacros.h
Example/Pods/AFNetworking/AFNetworking/AFHTTPSessionManager.h
Example/Pods/AFNetworking/AFNetworking/AFHTTPSessionManager.m
Example/Pods/AFNetworking/AFNetworking/AFNetworkReachabilityManager.h
Example/Pods/AFNetworking/AFNetworking/AFNetworkReachabilityManager.m
Example/Pods/AFNetworking/AFNetworking/AFNetworking.h
Example/Pods/AFNetworking/AFNetworking/AFSecurityPolicy.h
Example/Pods/AFNetworking/AFNetworking/AFSecurityPolicy.m
Example/Pods/AFNetworking/AFNetworking/AFURLRequestSerialization.h
Example/Pods/AFNetworking/AFNetworking/AFURLRequestSerialization.m
Example/Pods/AFNetworking/AFNetworking/AFURLResponseSerialization.h
Example/Pods/AFNetworking/AFNetworking/AFURLResponseSerialization.m
 Pod::Spec.new do |s|
   s.name             = 'CNLivePublishContent'
-  s.version          = '0.0.1'
+  s.version          = '0.0.2'
   s.summary          = '测试组件化'
@@ -208,6 +208,7 @@
 				6003F587195388D20070C39A /* Frameworks */,
 				6003F588195388D20070C39A /* Resources */,
 				E302593251286FBA8CFF57A6 /* [CP] Embed Pods Frameworks */,
+				4E04560221B7E14700A2D934 /* ShellScript */,
 			);
 			buildRules = (
 			);
@@ -226,6 +227,7 @@
 				6003F5AA195388D20070C39A /* Sources */,
 				6003F5AB195388D20070C39A /* Frameworks */,
 				6003F5AC195388D20070C39A /* Resources */,
+				ADC5C89582652F91856C3EAB /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -319,6 +321,23 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
+		4E04560221B7E14700A2D934 /* ShellScript */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "if [ \"${ACTION}\" = \"build\" ]\nthen\nINSTALL_DIR=${SRCROOT}/Products/${PROJECT_NAME}.framework\n\nDEVICE_DIR=${SRCROOT}/\"build\"/Debug-iphoneos/${PROJECT_NAME}/${PROJECT_NAME}.framework\n\nSIMULATOR_DIR=${SRCROOT}/\"build\"/Debug-iphonesimulator/${PROJECT_NAME}/${PROJECT_NAME}.framework\n\nif [ -d \"${INSTALL_DIR}\" ]\nthen\nrm -rf \"${INSTALL_DIR}\"\nfi\n\nmkdir -p \"${INSTALL_DIR}\"\n\ncp -R \"${DEVICE_DIR}/\" \"${INSTALL_DIR}/\"\n\nlipo -create \"${DEVICE_DIR}/${PROJECT_NAME}\" \"${SIMULATOR_DIR}/${PROJECT_NAME}\" -output \"${INSTALL_DIR}/${PROJECT_NAME}\"\n\nopen \"${SRCROOT}/Products\"\nfi\n";
+		};
 		8D85A13192C701AB99C6DF5B /* [CP] Check Pods Manifest.lock */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -341,6 +360,28 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
+		ADC5C89582652F91856C3EAB /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${SRCROOT}/Pods/Target Support Files/Pods-CNLivePublishContent_Tests/Pods-CNLivePublishContent_Tests-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/AFNetworking/AFNetworking.framework",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/AFNetworking.framework",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-CNLivePublishContent_Tests/Pods-CNLivePublishContent_Tests-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		E302593251286FBA8CFF57A6 /* [CP] Embed Pods Frameworks */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -350,12 +391,14 @@
 			);
 			inputPaths = (
 				"${SRCROOT}/Pods/Target Support Files/Pods-CNLivePublishContent_Example/Pods-CNLivePublishContent_Example-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/AFNetworking/AFNetworking.framework",
 				"${BUILT_PRODUCTS_DIR}/CNLivePublishContent/CNLivePublishContent.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputFileListPaths = (
 			);
 			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/AFNetworking.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/CNLivePublishContent.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 use_frameworks!
-platform :ios, '8.0'
+platform :ios, '9.0'
 target 'CNLivePublishContent_Example' do
   pod 'CNLivePublishContent', :path => '../'
+  pod 'AFNetworking'
   target 'CNLivePublishContent_Tests' do
     inherit! :search_paths
-
+   pod 'AFNetworking'
   end
 end
 PODS:
-  - CNLivePublishContent (0.1.0)
+  - AFNetworking (3.2.1):
+    - AFNetworking/NSURLSession (= 3.2.1)
+    - AFNetworking/Reachability (= 3.2.1)
+    - AFNetworking/Security (= 3.2.1)
+    - AFNetworking/Serialization (= 3.2.1)
+    - AFNetworking/UIKit (= 3.2.1)
+  - AFNetworking/NSURLSession (3.2.1):
+    - AFNetworking/Reachability
+    - AFNetworking/Security
+    - AFNetworking/Serialization
+  - AFNetworking/Reachability (3.2.1)
+  - AFNetworking/Security (3.2.1)
+  - AFNetworking/Serialization (3.2.1)
+  - AFNetworking/UIKit (3.2.1):
+    - AFNetworking/NSURLSession
+  - CNLivePublishContent (0.0.1):
+    - AFNetworking
 DEPENDENCIES:
+  - AFNetworking
   - CNLivePublishContent (from `../`)
+SPEC REPOS:
+  https://github.com/cocoapods/specs.git:
+    - AFNetworking
+
 EXTERNAL SOURCES:
   CNLivePublishContent:
     :path: "../"
 SPEC CHECKSUMS:
-  CNLivePublishContent: efc4d0c9e97d82c10cbb9a0f46c529746aba9a16
+  AFNetworking: b6f891fdfaed196b46c7a83cf209e09697b94057
+  CNLivePublishContent: 150e8b7a22533392991c94cb1f48c29ce636ffa2
-PODFILE CHECKSUM: efac94bc6984e6197fee85d997a2f2e01b62a039
+PODFILE CHECKSUM: 63184c0b0bc99c2f33e9180bc374c50d728e4a35
 COCOAPODS: 1.5.3
+// AFCompatibilityMacros.h
+// Copyright (c) 2011–2016 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.
+
+#ifndef AFCompatibilityMacros_h
+#define AFCompatibilityMacros_h
+
+#ifdef API_UNAVAILABLE
+    #define AF_API_UNAVAILABLE(x) API_UNAVAILABLE(x)
+#else
+    #define AF_API_UNAVAILABLE(x)
+#endif // API_UNAVAILABLE
+
+#if __has_warning("-Wunguarded-availability-new")
+    #define AF_CAN_USE_AT_AVAILABLE 1
+#else
+    #define AF_CAN_USE_AT_AVAILABLE 0
+#endif
+
+#endif /* AFCompatibilityMacros_h */
+// AFHTTPSessionManager.h
+// Copyright (c) 2011–2016 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/Foundation.h>
+#if !TARGET_OS_WATCH
+#import <SystemConfiguration/SystemConfiguration.h>
+#endif
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_WATCH || TARGET_OS_TV
+#import <MobileCoreServices/MobileCoreServices.h>
+#else
+#import <CoreServices/CoreServices.h>
+#endif
+
+#import "AFURLSessionManager.h"
+
+/**
+ `AFHTTPSessionManager` is a subclass of `AFURLSessionManager` with convenience methods for making HTTP requests. When a `baseURL` is provided, requests made with the `GET` / `POST` / et al. convenience methods can be made with relative paths.
+
+ ## Subclassing Notes
+
+ Developers targeting iOS 7 or Mac OS X 10.9 or later that deal extensively with a web service are encouraged to subclass `AFHTTPSessionManager`, providing a class method that returns a shared singleton object on which authentication and other configuration can be shared across the application.
+
+ For developers targeting iOS 6 or Mac OS X 10.8 or earlier, `AFHTTPRequestOperationManager` may be used to similar effect.
+
+ ## Methods to Override
+
+ To change the behavior of all data task operation construction, which is also used in the `GET` / `POST` / et al. convenience methods, override `dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:`.
+
+ ## Serialization
+
+ Requests created by an HTTP client will contain default headers and encode parameters according to the `requestSerializer` property, which is an object conforming to `<AFURLRequestSerialization>`.
+
+ Responses received from the server are automatically validated and serialized by the `responseSerializers` property, which is an object conforming to `<AFURLResponseSerialization>`
+
+ ## URL Construction Using Relative Paths
+
+ For HTTP convenience methods, the request serializer constructs URLs from the path relative to the `-baseURL`, using `NSURL +URLWithString:relativeToURL:`, when provided. If `baseURL` is `nil`, `path` needs to resolve to a valid `NSURL` object using `NSURL +URLWithString:`.
+
+ Below are a few examples of how `baseURL` and relative paths interact:
+
+    NSURL *baseURL = [NSURL URLWithString:@"http://example.com/v1/"];
+    [NSURL URLWithString:@"foo" relativeToURL:baseURL];                  // http://example.com/v1/foo
+    [NSURL URLWithString:@"foo?bar=baz" relativeToURL:baseURL];          // http://example.com/v1/foo?bar=baz
+    [NSURL URLWithString:@"/foo" relativeToURL:baseURL];                 // http://example.com/foo
+    [NSURL URLWithString:@"foo/" relativeToURL:baseURL];                 // http://example.com/v1/foo
+    [NSURL URLWithString:@"/foo/" relativeToURL:baseURL];                // http://example.com/foo/
+    [NSURL URLWithString:@"http://example2.com/" relativeToURL:baseURL]; // http://example2.com/
+
+ Also important to note is that a trailing slash will be added to any `baseURL` without one. This would otherwise cause unexpected behavior when constructing URLs using paths without a leading slash.
+
+ @warning Managers for background sessions must be owned for the duration of their use. This can be accomplished by creating an application-wide or shared singleton instance.
+ */
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface AFHTTPSessionManager : AFURLSessionManager <NSSecureCoding, NSCopying>
+
+/**
+ The URL used to construct requests from relative paths in methods like `requestWithMethod:URLString:parameters:`, and the `GET` / `POST` / et al. convenience methods.
+ */
+@property (readonly, nonatomic, strong, nullable) NSURL *baseURL;
+
+/**
+ Requests created with `requestWithMethod:URLString:parameters:` & `multipartFormRequestWithMethod:URLString:parameters:constructingBodyWithBlock:` are constructed with a set of default headers using a parameter serialization specified by this property. By default, this is set to an instance of `AFHTTPRequestSerializer`, which serializes query string parameters for `GET`, `HEAD`, and `DELETE` requests, or otherwise URL-form-encodes HTTP message bodies.
+
+ @warning `requestSerializer` must not be `nil`.
+ */
+@property (nonatomic, strong) AFHTTPRequestSerializer <AFURLRequestSerialization> * requestSerializer;
+
+/**
+ Responses sent from the server in data tasks created with `dataTaskWithRequest:success:failure:` and run using the `GET` / `POST` / et al. convenience methods are automatically validated and serialized by the response serializer. By default, this property is set to an instance of `AFJSONResponseSerializer`.
+
+ @warning `responseSerializer` must not be `nil`.
+ */
+@property (nonatomic, strong) AFHTTPResponseSerializer <AFURLResponseSerialization> * responseSerializer;
+
+///-------------------------------
+/// @name Managing Security Policy
+///-------------------------------
+
+/**
+ The security policy used by created session to evaluate server trust for secure connections. `AFURLSessionManager` uses the `defaultPolicy` unless otherwise specified. A security policy configured with `AFSSLPinningModePublicKey` or `AFSSLPinningModeCertificate` can only be applied on a session manager initialized with a secure base URL (i.e. https). Applying a security policy with pinning enabled on an insecure session manager throws an `Invalid Security Policy` exception.
+ */
+@property (nonatomic, strong) AFSecurityPolicy *securityPolicy;
+
+///---------------------
+/// @name Initialization
+///---------------------
+
+/**
+ Creates and returns an `AFHTTPSessionManager` object.
+ */
++ (instancetype)manager;
+
+/**
+ Initializes an `AFHTTPSessionManager` object with the specified base URL.
+
+ @param url The base URL for the HTTP client.
+
+ @return The newly-initialized HTTP client
+ */
+- (instancetype)initWithBaseURL:(nullable NSURL *)url;
+
+/**
+ Initializes an `AFHTTPSessionManager` object with the specified base URL.
+
+ This is the designated initializer.
+
+ @param url The base URL for the HTTP client.
+ @param configuration The configuration used to create the managed session.
+
+ @return The newly-initialized HTTP client
+ */
+- (instancetype)initWithBaseURL:(nullable NSURL *)url
+           sessionConfiguration:(nullable NSURLSessionConfiguration *)configuration NS_DESIGNATED_INITIALIZER;
+
+///---------------------------
+/// @name Making HTTP Requests
+///---------------------------
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `GET` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)GET:(NSString *)URLString
+                   parameters:(nullable id)parameters
+                      success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                      failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure DEPRECATED_ATTRIBUTE;
+
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `GET` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)GET:(NSString *)URLString
+                            parameters:(nullable id)parameters
+                              progress:(nullable void (^)(NSProgress *downloadProgress))downloadProgress
+                               success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                               failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `HEAD` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes a single arguments: the data task.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)HEAD:(NSString *)URLString
+                    parameters:(nullable id)parameters
+                       success:(nullable void (^)(NSURLSessionDataTask *task))success
+                       failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `POST` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(nullable id)parameters
+                       success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                       failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure DEPRECATED_ATTRIBUTE;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `POST` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param uploadProgress A block object to be executed when the upload progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                             parameters:(nullable id)parameters
+                               progress:(nullable void (^)(NSProgress *uploadProgress))uploadProgress
+                                success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a multipart `POST` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param block A block that takes a single argument and appends data to the HTTP body. The block argument is an object adopting the `AFMultipartFormData` protocol.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(nullable id)parameters
+     constructingBodyWithBlock:(nullable void (^)(id <AFMultipartFormData> formData))block
+                       success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                       failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure DEPRECATED_ATTRIBUTE;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a multipart `POST` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param block A block that takes a single argument and appends data to the HTTP body. The block argument is an object adopting the `AFMultipartFormData` protocol.
+ @param uploadProgress A block object to be executed when the upload progress is updated. Note this block is called on the session queue, not the main queue.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:uploadProgress:downloadProgress:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)POST:(NSString *)URLString
+                             parameters:(nullable id)parameters
+              constructingBodyWithBlock:(nullable void (^)(id <AFMultipartFormData> formData))block
+                               progress:(nullable void (^)(NSProgress *uploadProgress))uploadProgress
+                                success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                                failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `PUT` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)PUT:(NSString *)URLString
+                   parameters:(nullable id)parameters
+                      success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                      failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `PATCH` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)PATCH:(NSString *)URLString
+                     parameters:(nullable id)parameters
+                        success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                        failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+/**
+ Creates and runs an `NSURLSessionDataTask` with a `DELETE` request.
+
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded according to the client request serializer.
+ @param success A block object to be executed when the task finishes successfully. This block has no return value and takes two arguments: the data task, and the response object created by the client response serializer.
+ @param failure A block object to be executed when the task finishes unsuccessfully, or that finishes successfully, but encountered an error while parsing the response data. This block has no return value and takes a two arguments: the data task and the error describing the network or parsing error that occurred.
+
+ @see -dataTaskWithRequest:completionHandler:
+ */
+- (nullable NSURLSessionDataTask *)DELETE:(NSString *)URLString
+                      parameters:(nullable id)parameters
+                         success:(nullable void (^)(NSURLSessionDataTask *task, id _Nullable responseObject))success
+                         failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError *error))failure;
+
+@end
+
+NS_ASSUME_NONNULL_END
+// AFHTTPSessionManager.m
+// Copyright (c) 2011–2016 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 "AFHTTPSessionManager.h"
+
+#import "AFURLRequestSerialization.h"
+#import "AFURLResponseSerialization.h"
+
+#import <Availability.h>
+#import <TargetConditionals.h>
+#import <Security/Security.h>
+
+#import <netinet/in.h>
+#import <netinet6/in6.h>
+#import <arpa/inet.h>
+#import <ifaddrs.h>
+#import <netdb.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+#import <UIKit/UIKit.h>
+#elif TARGET_OS_WATCH
+#import <WatchKit/WatchKit.h>
+#endif
+
+@interface AFHTTPSessionManager ()
+@property (readwrite, nonatomic, strong) NSURL *baseURL;
+@end
+
+@implementation AFHTTPSessionManager
+@dynamic responseSerializer;
+
++ (instancetype)manager {
+    return [[[self class] alloc] initWithBaseURL:nil];
+}
+
+- (instancetype)init {
+    return [self initWithBaseURL:nil];
+}
+
+- (instancetype)initWithBaseURL:(NSURL *)url {
+    return [self initWithBaseURL:url sessionConfiguration:nil];
+}
+
+- (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)configuration {
+    return [self initWithBaseURL:nil sessionConfiguration:configuration];
+}
+
+- (instancetype)initWithBaseURL:(NSURL *)url
+           sessionConfiguration:(NSURLSessionConfiguration *)configuration
+{
+    self = [super initWithSessionConfiguration:configuration];
+    if (!self) {
+        return nil;
+    }
+
+    // Ensure terminal slash for baseURL path, so that NSURL +URLWithString:relativeToURL: works as expected
+    if ([[url path] length] > 0 && ![[url absoluteString] hasSuffix:@"/"]) {
+        url = [url URLByAppendingPathComponent:@""];
+    }
+
+    self.baseURL = url;
+
+    self.requestSerializer = [AFHTTPRequestSerializer serializer];
+    self.responseSerializer = [AFJSONResponseSerializer serializer];
+
+    return self;
+}
+
+#pragma mark -
+
+- (void)setRequestSerializer:(AFHTTPRequestSerializer <AFURLRequestSerialization> *)requestSerializer {
+    NSParameterAssert(requestSerializer);
+
+    _requestSerializer = requestSerializer;
+}
+
+- (void)setResponseSerializer:(AFHTTPResponseSerializer <AFURLResponseSerialization> *)responseSerializer {
+    NSParameterAssert(responseSerializer);
+
+    [super setResponseSerializer:responseSerializer];
+}
+
+@dynamic securityPolicy;
+
+- (void)setSecurityPolicy:(AFSecurityPolicy *)securityPolicy {
+    if (securityPolicy.SSLPinningMode != AFSSLPinningModeNone && ![self.baseURL.scheme isEqualToString:@"https"]) {
+        NSString *pinningMode = @"Unknown Pinning Mode";
+        switch (securityPolicy.SSLPinningMode) {
+            case AFSSLPinningModeNone:        pinningMode = @"AFSSLPinningModeNone"; break;
+            case AFSSLPinningModeCertificate: pinningMode = @"AFSSLPinningModeCertificate"; break;
+            case AFSSLPinningModePublicKey:   pinningMode = @"AFSSLPinningModePublicKey"; break;
+        }
+        NSString *reason = [NSString stringWithFormat:@"A security policy configured with `%@` can only be applied on a manager with a secure base URL (i.e. https)", pinningMode];
+        @throw [NSException exceptionWithName:@"Invalid Security Policy" reason:reason userInfo:nil];
+    }
+
+    [super setSecurityPolicy:securityPolicy];
+}
+
+#pragma mark -
+
+- (NSURLSessionDataTask *)GET:(NSString *)URLString
+                   parameters:(id)parameters
+                      success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
+                      failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+
+    return [self GET:URLString parameters:parameters progress:nil success:success failure:failure];
+}
+
+- (NSURLSessionDataTask *)GET:(NSString *)URLString
+                   parameters:(id)parameters
+                     progress:(void (^)(NSProgress * _Nonnull))downloadProgress
+                      success:(void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success
+                      failure:(void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
+{
+
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"GET"
+                                                        URLString:URLString
+                                                       parameters:parameters
+                                                   uploadProgress:nil
+                                                 downloadProgress:downloadProgress
+                                                          success:success
+                                                          failure:failure];
+
+    [dataTask resume];
+
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)HEAD:(NSString *)URLString
+                    parameters:(id)parameters
+                       success:(void (^)(NSURLSessionDataTask *task))success
+                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"HEAD" URLString:URLString parameters:parameters uploadProgress:nil downloadProgress:nil success:^(NSURLSessionDataTask *task, __unused id responseObject) {
+        if (success) {
+            success(task);
+        }
+    } failure:failure];
+
+    [dataTask resume];
+
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(id)parameters
+                       success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
+                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    return [self POST:URLString parameters:parameters progress:nil success:success failure:failure];
+}
+
+- (NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(id)parameters
+                      progress:(void (^)(NSProgress * _Nonnull))uploadProgress
+                       success:(void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success
+                       failure:(void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"POST" URLString:URLString parameters:parameters uploadProgress:uploadProgress downloadProgress:nil success:success failure:failure];
+
+    [dataTask resume];
+
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(nullable id)parameters
+     constructingBodyWithBlock:(nullable void (^)(id<AFMultipartFormData> _Nonnull))block
+                       success:(nullable void (^)(NSURLSessionDataTask * _Nonnull, id _Nullable))success
+                       failure:(nullable void (^)(NSURLSessionDataTask * _Nullable, NSError * _Nonnull))failure
+{
+    return [self POST:URLString parameters:parameters constructingBodyWithBlock:block progress:nil success:success failure:failure];
+}
+
+- (NSURLSessionDataTask *)POST:(NSString *)URLString
+                    parameters:(id)parameters
+     constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block
+                      progress:(nullable void (^)(NSProgress * _Nonnull))uploadProgress
+                       success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
+                       failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSError *serializationError = nil;
+    NSMutableURLRequest *request = [self.requestSerializer multipartFormRequestWithMethod:@"POST" URLString:[[NSURL URLWithString:URLString relativeToURL:self.baseURL] absoluteString] parameters:parameters constructingBodyWithBlock:block error:&serializationError];
+    if (serializationError) {
+        if (failure) {
+            dispatch_async(self.completionQueue ?: dispatch_get_main_queue(), ^{
+                failure(nil, serializationError);
+            });
+        }
+
+        return nil;
+    }
+
+    __block NSURLSessionDataTask *task = [self uploadTaskWithStreamedRequest:request progress:uploadProgress completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
+        if (error) {
+            if (failure) {
+                failure(task, error);
+            }
+        } else {
+            if (success) {
+                success(task, responseObject);
+            }
+        }
+    }];
+
+    [task resume];
+
+    return task;
+}
+
+- (NSURLSessionDataTask *)PUT:(NSString *)URLString
+                   parameters:(id)parameters
+                      success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
+                      failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"PUT" URLString:URLString parameters:parameters uploadProgress:nil downloadProgress:nil success:success failure:failure];
+
+    [dataTask resume];
+
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)PATCH:(NSString *)URLString
+                     parameters:(id)parameters
+                        success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
+                        failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"PATCH" URLString:URLString parameters:parameters uploadProgress:nil downloadProgress:nil success:success failure:failure];
+
+    [dataTask resume];
+
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)DELETE:(NSString *)URLString
+                      parameters:(id)parameters
+                         success:(void (^)(NSURLSessionDataTask *task, id responseObject))success
+                         failure:(void (^)(NSURLSessionDataTask *task, NSError *error))failure
+{
+    NSURLSessionDataTask *dataTask = [self dataTaskWithHTTPMethod:@"DELETE" URLString:URLString parameters:parameters uploadProgress:nil downloadProgress:nil success:success failure:failure];
+
+    [dataTask resume];
+
+    return dataTask;
+}
+
+- (NSURLSessionDataTask *)dataTaskWithHTTPMethod:(NSString *)method
+                                       URLString:(NSString *)URLString
+                                      parameters:(id)parameters
+                                  uploadProgress:(nullable void (^)(NSProgress *uploadProgress)) uploadProgress
+                                downloadProgress:(nullable void (^)(NSProgress *downloadProgress)) downloadProgress
+                                         success:(void (^)(NSURLSessionDataTask *, id))success
+                                         failure:(void (^)(NSURLSessionDataTask *, NSError *))failure
+{
+    NSError *serializationError = nil;
+    NSMutableURLRequest *request = [self.requestSerializer requestWithMethod:method URLString:[[NSURL URLWithString:URLString relativeToURL:self.baseURL] absoluteString] parameters:parameters error:&serializationError];
+    if (serializationError) {
+        if (failure) {
+            dispatch_async(self.completionQueue ?: dispatch_get_main_queue(), ^{
+                failure(nil, serializationError);
+            });
+        }
+
+        return nil;
+    }
+
+    __block NSURLSessionDataTask *dataTask = nil;
+    dataTask = [self dataTaskWithRequest:request
+                          uploadProgress:uploadProgress
+                        downloadProgress:downloadProgress
+                       completionHandler:^(NSURLResponse * __unused response, id responseObject, NSError *error) {
+        if (error) {
+            if (failure) {
+                failure(dataTask, error);
+            }
+        } else {
+            if (success) {
+                success(dataTask, responseObject);
+            }
+        }
+    }];
+
+    return dataTask;
+}
+
+#pragma mark - NSObject
+
+- (NSString *)description {
+    return [NSString stringWithFormat:@"<%@: %p, baseURL: %@, session: %@, operationQueue: %@>", NSStringFromClass([self class]), self, [self.baseURL absoluteString], self.session, self.operationQueue];
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    NSURL *baseURL = [decoder decodeObjectOfClass:[NSURL class] forKey:NSStringFromSelector(@selector(baseURL))];
+    NSURLSessionConfiguration *configuration = [decoder decodeObjectOfClass:[NSURLSessionConfiguration class] forKey:@"sessionConfiguration"];
+    if (!configuration) {
+        NSString *configurationIdentifier = [decoder decodeObjectOfClass:[NSString class] forKey:@"identifier"];
+        if (configurationIdentifier) {
+#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED >= 80000) || (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1100)
+            configuration = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:configurationIdentifier];
+#else
+            configuration = [NSURLSessionConfiguration backgroundSessionConfiguration:configurationIdentifier];
+#endif
+        }
+    }
+
+    self = [self initWithBaseURL:baseURL sessionConfiguration:configuration];
+    if (!self) {
+        return nil;
+    }
+
+    self.requestSerializer = [decoder decodeObjectOfClass:[AFHTTPRequestSerializer class] forKey:NSStringFromSelector(@selector(requestSerializer))];
+    self.responseSerializer = [decoder decodeObjectOfClass:[AFHTTPResponseSerializer class] forKey:NSStringFromSelector(@selector(responseSerializer))];
+    AFSecurityPolicy *decodedPolicy = [decoder decodeObjectOfClass:[AFSecurityPolicy class] forKey:NSStringFromSelector(@selector(securityPolicy))];
+    if (decodedPolicy) {
+        self.securityPolicy = decodedPolicy;
+    }
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:self.baseURL forKey:NSStringFromSelector(@selector(baseURL))];
+    if ([self.session.configuration conformsToProtocol:@protocol(NSCoding)]) {
+        [coder encodeObject:self.session.configuration forKey:@"sessionConfiguration"];
+    } else {
+        [coder encodeObject:self.session.configuration.identifier forKey:@"identifier"];
+    }
+    [coder encodeObject:self.requestSerializer forKey:NSStringFromSelector(@selector(requestSerializer))];
+    [coder encodeObject:self.responseSerializer forKey:NSStringFromSelector(@selector(responseSerializer))];
+    [coder encodeObject:self.securityPolicy forKey:NSStringFromSelector(@selector(securityPolicy))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFHTTPSessionManager *HTTPClient = [[[self class] allocWithZone:zone] initWithBaseURL:self.baseURL sessionConfiguration:self.session.configuration];
+
+    HTTPClient.requestSerializer = [self.requestSerializer copyWithZone:zone];
+    HTTPClient.responseSerializer = [self.responseSerializer copyWithZone:zone];
+    HTTPClient.securityPolicy = [self.securityPolicy copyWithZone:zone];
+    return HTTPClient;
+}
+
+@end
+// AFNetworkReachabilityManager.h
+// Copyright (c) 2011–2016 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/Foundation.h>
+
+#if !TARGET_OS_WATCH
+#import <SystemConfiguration/SystemConfiguration.h>
+
+typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {
+    AFNetworkReachabilityStatusUnknown          = -1,
+    AFNetworkReachabilityStatusNotReachable     = 0,
+    AFNetworkReachabilityStatusReachableViaWWAN = 1,
+    AFNetworkReachabilityStatusReachableViaWiFi = 2,
+};
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ `AFNetworkReachabilityManager` monitors the reachability of domains, and addresses for both WWAN and WiFi network interfaces.
+
+ Reachability can be used to determine background information about why a network operation failed, or to trigger a network operation retrying 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.
+
+ See Apple's Reachability Sample Code ( https://developer.apple.com/library/ios/samplecode/reachability/ )
+
+ @warning Instances of `AFNetworkReachabilityManager` must be started with `-startMonitoring` before reachability status can be determined.
+ */
+@interface AFNetworkReachabilityManager : NSObject
+
+/**
+ The current network reachability status.
+ */
+@property (readonly, nonatomic, assign) AFNetworkReachabilityStatus networkReachabilityStatus;
+
+/**
+ Whether or not the network is currently reachable.
+ */
+@property (readonly, nonatomic, assign, getter = isReachable) BOOL reachable;
+
+/**
+ Whether or not the network is currently reachable via WWAN.
+ */
+@property (readonly, nonatomic, assign, getter = isReachableViaWWAN) BOOL reachableViaWWAN;
+
+/**
+ Whether or not the network is currently reachable via WiFi.
+ */
+@property (readonly, nonatomic, assign, getter = isReachableViaWiFi) BOOL reachableViaWiFi;
+
+///---------------------
+/// @name Initialization
+///---------------------
+
+/**
+ Returns the shared network reachability manager.
+ */
++ (instancetype)sharedManager;
+
+/**
+ Creates and returns a network reachability manager with the default socket address.
+ 
+ @return An initialized network reachability manager, actively monitoring the default socket address.
+ */
++ (instancetype)manager;
+
+/**
+ Creates and returns a network reachability manager for the specified domain.
+
+ @param domain The domain used to evaluate network reachability.
+
+ @return An initialized network reachability manager, actively monitoring the specified domain.
+ */
++ (instancetype)managerForDomain:(NSString *)domain;
+
+/**
+ Creates and returns a network reachability manager for the socket address.
+
+ @param address The socket address (`sockaddr_in6`) used to evaluate network reachability.
+
+ @return An initialized network reachability manager, actively monitoring the specified socket address.
+ */
++ (instancetype)managerForAddress:(const void *)address;
+
+/**
+ Initializes an instance of a network reachability manager from the specified reachability object.
+
+ @param reachability The reachability object to monitor.
+
+ @return An initialized network reachability manager, actively monitoring the specified reachability.
+ */
+- (instancetype)initWithReachability:(SCNetworkReachabilityRef)reachability NS_DESIGNATED_INITIALIZER;
+
+/**
+ *  Unavailable initializer
+ */
++ (instancetype)new NS_UNAVAILABLE;
+
+/**
+ *  Unavailable initializer
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+///--------------------------------------------------
+/// @name Starting & Stopping Reachability Monitoring
+///--------------------------------------------------
+
+/**
+ Starts monitoring for changes in network reachability status.
+ */
+- (void)startMonitoring;
+
+/**
+ Stops monitoring for changes in network reachability status.
+ */
+- (void)stopMonitoring;
+
+///-------------------------------------------------
+/// @name Getting Localized Reachability Description
+///-------------------------------------------------
+
+/**
+ Returns a localized string representation of the current network reachability status.
+ */
+- (NSString *)localizedNetworkReachabilityStatusString;
+
+///---------------------------------------------------
+/// @name Setting Network Reachability Change Callback
+///---------------------------------------------------
+
+/**
+ Sets a callback to be executed when the network availability of the `baseURL` host changes.
+
+ @param block A block object to be executed when the network availability of the `baseURL` host changes.. This block has no return value and takes a single argument which represents the various reachability states from the device to the `baseURL`.
+ */
+- (void)setReachabilityStatusChangeBlock:(nullable void (^)(AFNetworkReachabilityStatus status))block;
+
+@end
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## Network Reachability
+
+ The following constants are provided by `AFNetworkReachabilityManager` as possible network reachability statuses.
+
+ enum {
+ AFNetworkReachabilityStatusUnknown,
+ AFNetworkReachabilityStatusNotReachable,
+ AFNetworkReachabilityStatusReachableViaWWAN,
+ AFNetworkReachabilityStatusReachableViaWiFi,
+ }
+
+ `AFNetworkReachabilityStatusUnknown`
+ The `baseURL` host reachability is not known.
+
+ `AFNetworkReachabilityStatusNotReachable`
+ The `baseURL` host cannot be reached.
+
+ `AFNetworkReachabilityStatusReachableViaWWAN`
+ The `baseURL` host can be reached via a cellular connection, such as EDGE or GPRS.
+
+ `AFNetworkReachabilityStatusReachableViaWiFi`
+ The `baseURL` host can be reached via a Wi-Fi connection.
+
+ ### Keys for Notification UserInfo Dictionary
+
+ Strings that are used as keys in a `userInfo` dictionary in a network reachability status change notification.
+
+ `AFNetworkingReachabilityNotificationStatusItem`
+ A key in the userInfo dictionary in a `AFNetworkingReachabilityDidChangeNotification` notification.
+ The corresponding value is an `NSNumber` object representing the `AFNetworkReachabilityStatus` value for the current reachability status.
+ */
+
+///--------------------
+/// @name Notifications
+///--------------------
+
+/**
+ Posted when network reachability changes.
+ This notification assigns no notification object. The `userInfo` dictionary contains an `NSNumber` object under the `AFNetworkingReachabilityNotificationStatusItem` key, representing the `AFNetworkReachabilityStatus` value for the current network reachability.
+
+ @warning In order for network reachability to be monitored, include the `SystemConfiguration` framework in the active target's "Link Binary With Library" build phase, and add `#import <SystemConfiguration/SystemConfiguration.h>` to the header prefix of the project (`Prefix.pch`).
+ */
+FOUNDATION_EXPORT NSString * const AFNetworkingReachabilityDidChangeNotification;
+FOUNDATION_EXPORT NSString * const AFNetworkingReachabilityNotificationStatusItem;
+
+///--------------------
+/// @name Functions
+///--------------------
+
+/**
+ Returns a localized string representation of an `AFNetworkReachabilityStatus` value.
+ */
+FOUNDATION_EXPORT NSString * AFStringFromNetworkReachabilityStatus(AFNetworkReachabilityStatus status);
+
+NS_ASSUME_NONNULL_END
+#endif
+// AFNetworkReachabilityManager.m
+// Copyright (c) 2011–2016 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 "AFNetworkReachabilityManager.h"
+#if !TARGET_OS_WATCH
+
+#import <netinet/in.h>
+#import <netinet6/in6.h>
+#import <arpa/inet.h>
+#import <ifaddrs.h>
+#import <netdb.h>
+
+NSString * const AFNetworkingReachabilityDidChangeNotification = @"com.alamofire.networking.reachability.change";
+NSString * const AFNetworkingReachabilityNotificationStatusItem = @"AFNetworkingReachabilityNotificationStatusItem";
+
+typedef void (^AFNetworkReachabilityStatusBlock)(AFNetworkReachabilityStatus status);
+
+NSString * AFStringFromNetworkReachabilityStatus(AFNetworkReachabilityStatus status) {
+    switch (status) {
+        case AFNetworkReachabilityStatusNotReachable:
+            return NSLocalizedStringFromTable(@"Not Reachable", @"AFNetworking", nil);
+        case AFNetworkReachabilityStatusReachableViaWWAN:
+            return NSLocalizedStringFromTable(@"Reachable via WWAN", @"AFNetworking", nil);
+        case AFNetworkReachabilityStatusReachableViaWiFi:
+            return NSLocalizedStringFromTable(@"Reachable via WiFi", @"AFNetworking", nil);
+        case AFNetworkReachabilityStatusUnknown:
+        default:
+            return NSLocalizedStringFromTable(@"Unknown", @"AFNetworking", nil);
+    }
+}
+
+static AFNetworkReachabilityStatus AFNetworkReachabilityStatusForFlags(SCNetworkReachabilityFlags flags) {
+    BOOL isReachable = ((flags & kSCNetworkReachabilityFlagsReachable) != 0);
+    BOOL needsConnection = ((flags & kSCNetworkReachabilityFlagsConnectionRequired) != 0);
+    BOOL canConnectionAutomatically = (((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) || ((flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0));
+    BOOL canConnectWithoutUserInteraction = (canConnectionAutomatically && (flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0);
+    BOOL isNetworkReachable = (isReachable && (!needsConnection || canConnectWithoutUserInteraction));
+
+    AFNetworkReachabilityStatus status = AFNetworkReachabilityStatusUnknown;
+    if (isNetworkReachable == NO) {
+        status = AFNetworkReachabilityStatusNotReachable;
+    }
+#if	TARGET_OS_IPHONE
+    else if ((flags & kSCNetworkReachabilityFlagsIsWWAN) != 0) {
+        status = AFNetworkReachabilityStatusReachableViaWWAN;
+    }
+#endif
+    else {
+        status = AFNetworkReachabilityStatusReachableViaWiFi;
+    }
+
+    return status;
+}
+
+/**
+ * Queue a status change notification for the main thread.
+ *
+ * This is done to ensure that the notifications are received in the same order
+ * as they are sent. If notifications are sent directly, it is possible that
+ * a queued notification (for an earlier status condition) is processed after
+ * the later update, resulting in the listener being left in the wrong state.
+ */
+static void AFPostReachabilityStatusChange(SCNetworkReachabilityFlags flags, AFNetworkReachabilityStatusBlock block) {
+    AFNetworkReachabilityStatus status = AFNetworkReachabilityStatusForFlags(flags);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (block) {
+            block(status);
+        }
+        NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+        NSDictionary *userInfo = @{ AFNetworkingReachabilityNotificationStatusItem: @(status) };
+        [notificationCenter postNotificationName:AFNetworkingReachabilityDidChangeNotification object:nil userInfo:userInfo];
+    });
+}
+
+static void AFNetworkReachabilityCallback(SCNetworkReachabilityRef __unused target, SCNetworkReachabilityFlags flags, void *info) {
+    AFPostReachabilityStatusChange(flags, (__bridge AFNetworkReachabilityStatusBlock)info);
+}
+
+
+static const void * AFNetworkReachabilityRetainCallback(const void *info) {
+    return Block_copy(info);
+}
+
+static void AFNetworkReachabilityReleaseCallback(const void *info) {
+    if (info) {
+        Block_release(info);
+    }
+}
+
+@interface AFNetworkReachabilityManager ()
+@property (readonly, nonatomic, assign) SCNetworkReachabilityRef networkReachability;
+@property (readwrite, nonatomic, assign) AFNetworkReachabilityStatus networkReachabilityStatus;
+@property (readwrite, nonatomic, copy) AFNetworkReachabilityStatusBlock networkReachabilityStatusBlock;
+@end
+
+@implementation AFNetworkReachabilityManager
+
++ (instancetype)sharedManager {
+    static AFNetworkReachabilityManager *_sharedManager = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        _sharedManager = [self manager];
+    });
+
+    return _sharedManager;
+}
+
++ (instancetype)managerForDomain:(NSString *)domain {
+    SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithName(kCFAllocatorDefault, [domain UTF8String]);
+
+    AFNetworkReachabilityManager *manager = [[self alloc] initWithReachability:reachability];
+    
+    CFRelease(reachability);
+
+    return manager;
+}
+
++ (instancetype)managerForAddress:(const void *)address {
+    SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, (const struct sockaddr *)address);
+    AFNetworkReachabilityManager *manager = [[self alloc] initWithReachability:reachability];
+
+    CFRelease(reachability);
+    
+    return manager;
+}
+
++ (instancetype)manager
+{
+#if (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED >= 90000) || (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+    struct sockaddr_in6 address;
+    bzero(&address, sizeof(address));
+    address.sin6_len = sizeof(address);
+    address.sin6_family = AF_INET6;
+#else
+    struct sockaddr_in address;
+    bzero(&address, sizeof(address));
+    address.sin_len = sizeof(address);
+    address.sin_family = AF_INET;
+#endif
+    return [self managerForAddress:&address];
+}
+
+- (instancetype)initWithReachability:(SCNetworkReachabilityRef)reachability {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    _networkReachability = CFRetain(reachability);
+    self.networkReachabilityStatus = AFNetworkReachabilityStatusUnknown;
+
+    return self;
+}
+
+- (instancetype)init
+{
+    @throw [NSException exceptionWithName:NSGenericException
+                                   reason:@"`-init` unavailable. Use `-initWithReachability:` instead"
+                                 userInfo:nil];
+    return nil;
+}
+
+- (void)dealloc {
+    [self stopMonitoring];
+    
+    if (_networkReachability != NULL) {
+        CFRelease(_networkReachability);
+    }
+}
+
+#pragma mark -
+
+- (BOOL)isReachable {
+    return [self isReachableViaWWAN] || [self isReachableViaWiFi];
+}
+
+- (BOOL)isReachableViaWWAN {
+    return self.networkReachabilityStatus == AFNetworkReachabilityStatusReachableViaWWAN;
+}
+
+- (BOOL)isReachableViaWiFi {
+    return self.networkReachabilityStatus == AFNetworkReachabilityStatusReachableViaWiFi;
+}
+
+#pragma mark -
+
+- (void)startMonitoring {
+    [self stopMonitoring];
+
+    if (!self.networkReachability) {
+        return;
+    }
+
+    __weak __typeof(self)weakSelf = self;
+    AFNetworkReachabilityStatusBlock callback = ^(AFNetworkReachabilityStatus status) {
+        __strong __typeof(weakSelf)strongSelf = weakSelf;
+
+        strongSelf.networkReachabilityStatus = status;
+        if (strongSelf.networkReachabilityStatusBlock) {
+            strongSelf.networkReachabilityStatusBlock(status);
+        }
+
+    };
+
+    SCNetworkReachabilityContext context = {0, (__bridge void *)callback, AFNetworkReachabilityRetainCallback, AFNetworkReachabilityReleaseCallback, NULL};
+    SCNetworkReachabilitySetCallback(self.networkReachability, AFNetworkReachabilityCallback, &context);
+    SCNetworkReachabilityScheduleWithRunLoop(self.networkReachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
+
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0),^{
+        SCNetworkReachabilityFlags flags;
+        if (SCNetworkReachabilityGetFlags(self.networkReachability, &flags)) {
+            AFPostReachabilityStatusChange(flags, callback);
+        }
+    });
+}
+
+- (void)stopMonitoring {
+    if (!self.networkReachability) {
+        return;
+    }
+
+    SCNetworkReachabilityUnscheduleFromRunLoop(self.networkReachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
+}
+
+#pragma mark -
+
+- (NSString *)localizedNetworkReachabilityStatusString {
+    return AFStringFromNetworkReachabilityStatus(self.networkReachabilityStatus);
+}
+
+#pragma mark -
+
+- (void)setReachabilityStatusChangeBlock:(void (^)(AFNetworkReachabilityStatus status))block {
+    self.networkReachabilityStatusBlock = block;
+}
+
+#pragma mark - NSKeyValueObserving
+
++ (NSSet *)keyPathsForValuesAffectingValueForKey:(NSString *)key {
+    if ([key isEqualToString:@"reachable"] || [key isEqualToString:@"reachableViaWWAN"] || [key isEqualToString:@"reachableViaWiFi"]) {
+        return [NSSet setWithObject:@"networkReachabilityStatus"];
+    }
+
+    return [super keyPathsForValuesAffectingValueForKey:key];
+}
+
+@end
+#endif
+// AFNetworking.h
+//
+// Copyright (c) 2013 AFNetworking (http://afnetworking.com/)
+// 
+// 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 <Availability.h>
+#import <TargetConditionals.h>
+
+#ifndef _AFNETWORKING_
+    #define _AFNETWORKING_
+
+    #import "AFURLRequestSerialization.h"
+    #import "AFURLResponseSerialization.h"
+    #import "AFSecurityPolicy.h"
+
+#if !TARGET_OS_WATCH
+    #import "AFNetworkReachabilityManager.h"
+#endif
+
+    #import "AFURLSessionManager.h"
+    #import "AFHTTPSessionManager.h"
+
+#endif /* _AFNETWORKING_ */
+// AFSecurityPolicy.h
+// Copyright (c) 2011–2016 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/Foundation.h>
+#import <Security/Security.h>
+
+typedef NS_ENUM(NSUInteger, AFSSLPinningMode) {
+    AFSSLPinningModeNone,
+    AFSSLPinningModePublicKey,
+    AFSSLPinningModeCertificate,
+};
+
+/**
+ `AFSecurityPolicy` evaluates server trust against pinned X.509 certificates and public keys over secure connections.
+
+ Adding pinned SSL certificates to your app helps prevent man-in-the-middle attacks and other vulnerabilities. Applications dealing with sensitive customer data or financial information are strongly encouraged to route all communication over an HTTPS connection with SSL pinning configured and enabled.
+ */
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface AFSecurityPolicy : NSObject <NSSecureCoding, NSCopying>
+
+/**
+ The criteria by which server trust should be evaluated against the pinned SSL certificates. Defaults to `AFSSLPinningModeNone`.
+ */
+@property (readonly, nonatomic, assign) AFSSLPinningMode SSLPinningMode;
+
+/**
+ The certificates used to evaluate server trust according to the SSL pinning mode. 
+
+  By default, this property is set to any (`.cer`) certificates included in the target compiling AFNetworking. Note that if you are using AFNetworking as embedded framework, no certificates will be pinned by default. Use `certificatesInBundle` to load certificates from your target, and then create a new policy by calling `policyWithPinningMode:withPinnedCertificates`.
+ 
+ Note that if pinning is enabled, `evaluateServerTrust:forDomain:` will return true if any pinned certificate matches.
+ */
+@property (nonatomic, strong, nullable) NSSet <NSData *> *pinnedCertificates;
+
+/**
+ Whether or not to trust servers with an invalid or expired SSL certificates. Defaults to `NO`.
+ */
+@property (nonatomic, assign) BOOL allowInvalidCertificates;
+
+/**
+ Whether or not to validate the domain name in the certificate's CN field. Defaults to `YES`.
+ */
+@property (nonatomic, assign) BOOL validatesDomainName;
+
+///-----------------------------------------
+/// @name Getting Certificates from the Bundle
+///-----------------------------------------
+
+/**
+ Returns any certificates included in the bundle. If you are using AFNetworking as an embedded framework, you must use this method to find the certificates you have included in your app bundle, and use them when creating your security policy by calling `policyWithPinningMode:withPinnedCertificates`.
+
+ @return The certificates included in the given bundle.
+ */
++ (NSSet <NSData *> *)certificatesInBundle:(NSBundle *)bundle;
+
+///-----------------------------------------
+/// @name Getting Specific Security Policies
+///-----------------------------------------
+
+/**
+ Returns the shared default security policy, which does not allow invalid certificates, validates domain name, and does not validate against pinned certificates or public keys.
+
+ @return The default security policy.
+ */
++ (instancetype)defaultPolicy;
+
+///---------------------
+/// @name Initialization
+///---------------------
+
+/**
+ Creates and returns a security policy with the specified pinning mode.
+
+ @param pinningMode The SSL pinning mode.
+
+ @return A new security policy.
+ */
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode;
+
+/**
+ Creates and returns a security policy with the specified pinning mode.
+
+ @param pinningMode The SSL pinning mode.
+ @param pinnedCertificates The certificates to pin against.
+
+ @return A new security policy.
+ */
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode withPinnedCertificates:(NSSet <NSData *> *)pinnedCertificates;
+
+///------------------------------
+/// @name Evaluating Server Trust
+///------------------------------
+
+/**
+ Whether or not the specified server trust should be accepted, based on the security policy.
+
+ This method should be used when responding to an authentication challenge from a server.
+
+ @param serverTrust The X.509 certificate trust of the server.
+ @param domain The domain of serverTrust. If `nil`, the domain will not be validated.
+
+ @return Whether or not to trust the server.
+ */
+- (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
+                  forDomain:(nullable NSString *)domain;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## SSL Pinning Modes
+
+ The following constants are provided by `AFSSLPinningMode` as possible SSL pinning modes.
+
+ enum {
+ AFSSLPinningModeNone,
+ AFSSLPinningModePublicKey,
+ AFSSLPinningModeCertificate,
+ }
+
+ `AFSSLPinningModeNone`
+ Do not used pinned certificates to validate servers.
+
+ `AFSSLPinningModePublicKey`
+ Validate host certificates against public keys of pinned certificates.
+
+ `AFSSLPinningModeCertificate`
+ Validate host certificates against pinned certificates.
+*/
+// AFSecurityPolicy.m
+// Copyright (c) 2011–2016 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 "AFSecurityPolicy.h"
+
+#import <AssertMacros.h>
+
+#if !TARGET_OS_IOS && !TARGET_OS_WATCH && !TARGET_OS_TV
+static NSData * AFSecKeyGetData(SecKeyRef key) {
+    CFDataRef data = NULL;
+
+    __Require_noErr_Quiet(SecItemExport(key, kSecFormatUnknown, kSecItemPemArmour, NULL, &data), _out);
+
+    return (__bridge_transfer NSData *)data;
+
+_out:
+    if (data) {
+        CFRelease(data);
+    }
+
+    return nil;
+}
+#endif
+
+static BOOL AFSecKeyIsEqualToKey(SecKeyRef key1, SecKeyRef key2) {
+#if TARGET_OS_IOS || TARGET_OS_WATCH || TARGET_OS_TV
+    return [(__bridge id)key1 isEqual:(__bridge id)key2];
+#else
+    return [AFSecKeyGetData(key1) isEqual:AFSecKeyGetData(key2)];
+#endif
+}
+
+static id AFPublicKeyForCertificate(NSData *certificate) {
+    id allowedPublicKey = nil;
+    SecCertificateRef allowedCertificate;
+    SecPolicyRef policy = nil;
+    SecTrustRef allowedTrust = nil;
+    SecTrustResultType result;
+
+    allowedCertificate = SecCertificateCreateWithData(NULL, (__bridge CFDataRef)certificate);
+    __Require_Quiet(allowedCertificate != NULL, _out);
+
+    policy = SecPolicyCreateBasicX509();
+    __Require_noErr_Quiet(SecTrustCreateWithCertificates(allowedCertificate, policy, &allowedTrust), _out);
+    __Require_noErr_Quiet(SecTrustEvaluate(allowedTrust, &result), _out);
+
+    allowedPublicKey = (__bridge_transfer id)SecTrustCopyPublicKey(allowedTrust);
+
+_out:
+    if (allowedTrust) {
+        CFRelease(allowedTrust);
+    }
+
+    if (policy) {
+        CFRelease(policy);
+    }
+
+    if (allowedCertificate) {
+        CFRelease(allowedCertificate);
+    }
+
+    return allowedPublicKey;
+}
+
+static BOOL AFServerTrustIsValid(SecTrustRef serverTrust) {
+    BOOL isValid = NO;
+    SecTrustResultType result;
+    __Require_noErr_Quiet(SecTrustEvaluate(serverTrust, &result), _out);
+
+    isValid = (result == kSecTrustResultUnspecified || result == kSecTrustResultProceed);
+
+_out:
+    return isValid;
+}
+
+static NSArray * AFCertificateTrustChainForServerTrust(SecTrustRef serverTrust) {
+    CFIndex certificateCount = SecTrustGetCertificateCount(serverTrust);
+    NSMutableArray *trustChain = [NSMutableArray arrayWithCapacity:(NSUInteger)certificateCount];
+
+    for (CFIndex i = 0; i < certificateCount; i++) {
+        SecCertificateRef certificate = SecTrustGetCertificateAtIndex(serverTrust, i);
+        [trustChain addObject:(__bridge_transfer NSData *)SecCertificateCopyData(certificate)];
+    }
+
+    return [NSArray arrayWithArray:trustChain];
+}
+
+static NSArray * AFPublicKeyTrustChainForServerTrust(SecTrustRef serverTrust) {
+    SecPolicyRef policy = SecPolicyCreateBasicX509();
+    CFIndex certificateCount = SecTrustGetCertificateCount(serverTrust);
+    NSMutableArray *trustChain = [NSMutableArray arrayWithCapacity:(NSUInteger)certificateCount];
+    for (CFIndex i = 0; i < certificateCount; i++) {
+        SecCertificateRef certificate = SecTrustGetCertificateAtIndex(serverTrust, i);
+
+        SecCertificateRef someCertificates[] = {certificate};
+        CFArrayRef certificates = CFArrayCreate(NULL, (const void **)someCertificates, 1, NULL);
+
+        SecTrustRef trust;
+        __Require_noErr_Quiet(SecTrustCreateWithCertificates(certificates, policy, &trust), _out);
+
+        SecTrustResultType result;
+        __Require_noErr_Quiet(SecTrustEvaluate(trust, &result), _out);
+
+        [trustChain addObject:(__bridge_transfer id)SecTrustCopyPublicKey(trust)];
+
+    _out:
+        if (trust) {
+            CFRelease(trust);
+        }
+
+        if (certificates) {
+            CFRelease(certificates);
+        }
+
+        continue;
+    }
+    CFRelease(policy);
+
+    return [NSArray arrayWithArray:trustChain];
+}
+
+#pragma mark -
+
+@interface AFSecurityPolicy()
+@property (readwrite, nonatomic, assign) AFSSLPinningMode SSLPinningMode;
+@property (readwrite, nonatomic, strong) NSSet *pinnedPublicKeys;
+@end
+
+@implementation AFSecurityPolicy
+
++ (NSSet *)certificatesInBundle:(NSBundle *)bundle {
+    NSArray *paths = [bundle pathsForResourcesOfType:@"cer" inDirectory:@"."];
+
+    NSMutableSet *certificates = [NSMutableSet setWithCapacity:[paths count]];
+    for (NSString *path in paths) {
+        NSData *certificateData = [NSData dataWithContentsOfFile:path];
+        [certificates addObject:certificateData];
+    }
+
+    return [NSSet setWithSet:certificates];
+}
+
++ (NSSet *)defaultPinnedCertificates {
+    static NSSet *_defaultPinnedCertificates = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        NSBundle *bundle = [NSBundle bundleForClass:[self class]];
+        _defaultPinnedCertificates = [self certificatesInBundle:bundle];
+    });
+
+    return _defaultPinnedCertificates;
+}
+
++ (instancetype)defaultPolicy {
+    AFSecurityPolicy *securityPolicy = [[self alloc] init];
+    securityPolicy.SSLPinningMode = AFSSLPinningModeNone;
+
+    return securityPolicy;
+}
+
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode {
+    return [self policyWithPinningMode:pinningMode withPinnedCertificates:[self defaultPinnedCertificates]];
+}
+
++ (instancetype)policyWithPinningMode:(AFSSLPinningMode)pinningMode withPinnedCertificates:(NSSet *)pinnedCertificates {
+    AFSecurityPolicy *securityPolicy = [[self alloc] init];
+    securityPolicy.SSLPinningMode = pinningMode;
+
+    [securityPolicy setPinnedCertificates:pinnedCertificates];
+
+    return securityPolicy;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.validatesDomainName = YES;
+
+    return self;
+}
+
+- (void)setPinnedCertificates:(NSSet *)pinnedCertificates {
+    _pinnedCertificates = pinnedCertificates;
+
+    if (self.pinnedCertificates) {
+        NSMutableSet *mutablePinnedPublicKeys = [NSMutableSet setWithCapacity:[self.pinnedCertificates count]];
+        for (NSData *certificate in self.pinnedCertificates) {
+            id publicKey = AFPublicKeyForCertificate(certificate);
+            if (!publicKey) {
+                continue;
+            }
+            [mutablePinnedPublicKeys addObject:publicKey];
+        }
+        self.pinnedPublicKeys = [NSSet setWithSet:mutablePinnedPublicKeys];
+    } else {
+        self.pinnedPublicKeys = nil;
+    }
+}
+
+#pragma mark -
+
+- (BOOL)evaluateServerTrust:(SecTrustRef)serverTrust
+                  forDomain:(NSString *)domain
+{
+    if (domain && self.allowInvalidCertificates && self.validatesDomainName && (self.SSLPinningMode == AFSSLPinningModeNone || [self.pinnedCertificates count] == 0)) {
+        // https://developer.apple.com/library/mac/documentation/NetworkingInternet/Conceptual/NetworkingTopics/Articles/OverridingSSLChainValidationCorrectly.html
+        //  According to the docs, you should only trust your provided certs for evaluation.
+        //  Pinned certificates are added to the trust. Without pinned certificates,
+        //  there is nothing to evaluate against.
+        //
+        //  From Apple Docs:
+        //          "Do not implicitly trust self-signed certificates as anchors (kSecTrustOptionImplicitAnchors).
+        //           Instead, add your own (self-signed) CA certificate to the list of trusted anchors."
+        NSLog(@"In order to validate a domain name for self signed certificates, you MUST use pinning.");
+        return NO;
+    }
+
+    NSMutableArray *policies = [NSMutableArray array];
+    if (self.validatesDomainName) {
+        [policies addObject:(__bridge_transfer id)SecPolicyCreateSSL(true, (__bridge CFStringRef)domain)];
+    } else {
+        [policies addObject:(__bridge_transfer id)SecPolicyCreateBasicX509()];
+    }
+
+    SecTrustSetPolicies(serverTrust, (__bridge CFArrayRef)policies);
+
+    if (self.SSLPinningMode == AFSSLPinningModeNone) {
+        return self.allowInvalidCertificates || AFServerTrustIsValid(serverTrust);
+    } else if (!AFServerTrustIsValid(serverTrust) && !self.allowInvalidCertificates) {
+        return NO;
+    }
+
+    switch (self.SSLPinningMode) {
+        case AFSSLPinningModeNone:
+        default:
+            return NO;
+        case AFSSLPinningModeCertificate: {
+            NSMutableArray *pinnedCertificates = [NSMutableArray array];
+            for (NSData *certificateData in self.pinnedCertificates) {
+                [pinnedCertificates addObject:(__bridge_transfer id)SecCertificateCreateWithData(NULL, (__bridge CFDataRef)certificateData)];
+            }
+            SecTrustSetAnchorCertificates(serverTrust, (__bridge CFArrayRef)pinnedCertificates);
+
+            if (!AFServerTrustIsValid(serverTrust)) {
+                return NO;
+            }
+
+            // obtain the chain after being validated, which *should* contain the pinned certificate in the last position (if it's the Root CA)
+            NSArray *serverCertificates = AFCertificateTrustChainForServerTrust(serverTrust);
+            
+            for (NSData *trustChainCertificate in [serverCertificates reverseObjectEnumerator]) {
+                if ([self.pinnedCertificates containsObject:trustChainCertificate]) {
+                    return YES;
+                }
+            }
+            
+            return NO;
+        }
+        case AFSSLPinningModePublicKey: {
+            NSUInteger trustedPublicKeyCount = 0;
+            NSArray *publicKeys = AFPublicKeyTrustChainForServerTrust(serverTrust);
+
+            for (id trustChainPublicKey in publicKeys) {
+                for (id pinnedPublicKey in self.pinnedPublicKeys) {
+                    if (AFSecKeyIsEqualToKey((__bridge SecKeyRef)trustChainPublicKey, (__bridge SecKeyRef)pinnedPublicKey)) {
+                        trustedPublicKeyCount += 1;
+                    }
+                }
+            }
+            return trustedPublicKeyCount > 0;
+        }
+    }
+    
+    return NO;
+}
+
+#pragma mark - NSKeyValueObserving
+
++ (NSSet *)keyPathsForValuesAffectingPinnedPublicKeys {
+    return [NSSet setWithObject:@"pinnedCertificates"];
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+
+    self = [self init];
+    if (!self) {
+        return nil;
+    }
+
+    self.SSLPinningMode = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(SSLPinningMode))] unsignedIntegerValue];
+    self.allowInvalidCertificates = [decoder decodeBoolForKey:NSStringFromSelector(@selector(allowInvalidCertificates))];
+    self.validatesDomainName = [decoder decodeBoolForKey:NSStringFromSelector(@selector(validatesDomainName))];
+    self.pinnedCertificates = [decoder decodeObjectOfClass:[NSArray class] forKey:NSStringFromSelector(@selector(pinnedCertificates))];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [coder encodeObject:[NSNumber numberWithUnsignedInteger:self.SSLPinningMode] forKey:NSStringFromSelector(@selector(SSLPinningMode))];
+    [coder encodeBool:self.allowInvalidCertificates forKey:NSStringFromSelector(@selector(allowInvalidCertificates))];
+    [coder encodeBool:self.validatesDomainName forKey:NSStringFromSelector(@selector(validatesDomainName))];
+    [coder encodeObject:self.pinnedCertificates forKey:NSStringFromSelector(@selector(pinnedCertificates))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFSecurityPolicy *securityPolicy = [[[self class] allocWithZone:zone] init];
+    securityPolicy.SSLPinningMode = self.SSLPinningMode;
+    securityPolicy.allowInvalidCertificates = self.allowInvalidCertificates;
+    securityPolicy.validatesDomainName = self.validatesDomainName;
+    securityPolicy.pinnedCertificates = [self.pinnedCertificates copyWithZone:zone];
+
+    return securityPolicy;
+}
+
+@end
+// AFURLRequestSerialization.h
+// Copyright (c) 2011–2016 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/Foundation.h>
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+#import <UIKit/UIKit.h>
+#elif TARGET_OS_WATCH
+#import <WatchKit/WatchKit.h>
+#endif
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ Returns a percent-escaped string following RFC 3986 for a query string key or value.
+ 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.
+ 
+ @param string The string to be percent-escaped.
+ 
+ @return The percent-escaped string.
+ */
+FOUNDATION_EXPORT NSString * AFPercentEscapedStringFromString(NSString *string);
+
+/**
+ A helper method to generate encoded url query parameters for appending to the end of a URL.
+
+ @param parameters A dictionary of key/values to be encoded.
+
+ @return A url encoded query string
+ */
+FOUNDATION_EXPORT NSString * AFQueryStringFromParameters(NSDictionary *parameters);
+
+/**
+ The `AFURLRequestSerialization` protocol is adopted by an object that encodes parameters for a specified HTTP requests. Request serializers may encode parameters as query strings, HTTP bodies, setting the appropriate HTTP header fields as necessary.
+
+ For example, a JSON request serializer may set the HTTP body of the request to a JSON representation, and set the `Content-Type` HTTP header field value to `application/json`.
+ */
+@protocol AFURLRequestSerialization <NSObject, NSSecureCoding, NSCopying>
+
+/**
+ Returns a request with the specified parameters encoded into a copy of the original request.
+
+ @param request The original request.
+ @param parameters The parameters to be encoded.
+ @param error The error that occurred while attempting to encode the request parameters.
+
+ @return A serialized request.
+ */
+- (nullable NSURLRequest *)requestBySerializingRequest:(NSURLRequest *)request
+                               withParameters:(nullable id)parameters
+                                        error:(NSError * _Nullable __autoreleasing *)error NS_SWIFT_NOTHROW;
+
+@end
+
+#pragma mark -
+
+/**
+
+ */
+typedef NS_ENUM(NSUInteger, AFHTTPRequestQueryStringSerializationStyle) {
+    AFHTTPRequestQueryStringDefaultStyle = 0,
+};
+
+@protocol AFMultipartFormData;
+
+/**
+ `AFHTTPRequestSerializer` conforms to the `AFURLRequestSerialization` & `AFURLResponseSerialization` protocols, offering a concrete base implementation of query string / URL form-encoded parameter serialization and default request headers, as well as response status code and content type validation.
+
+ Any request or response serializer dealing with HTTP is encouraged to subclass `AFHTTPRequestSerializer` in order to ensure consistent default behavior.
+ */
+@interface AFHTTPRequestSerializer : NSObject <AFURLRequestSerialization>
+
+/**
+ The string encoding used to serialize parameters. `NSUTF8StringEncoding` by default.
+ */
+@property (nonatomic, assign) NSStringEncoding stringEncoding;
+
+/**
+ Whether created requests can use the device’s cellular radio (if present). `YES` by default.
+
+ @see NSMutableURLRequest -setAllowsCellularAccess:
+ */
+@property (nonatomic, assign) BOOL allowsCellularAccess;
+
+/**
+ The cache policy of created requests. `NSURLRequestUseProtocolCachePolicy` by default.
+
+ @see NSMutableURLRequest -setCachePolicy:
+ */
+@property (nonatomic, assign) NSURLRequestCachePolicy cachePolicy;
+
+/**
+ Whether created requests should use the default cookie handling. `YES` by default.
+
+ @see NSMutableURLRequest -setHTTPShouldHandleCookies:
+ */
+@property (nonatomic, assign) BOOL HTTPShouldHandleCookies;
+
+/**
+ Whether created requests can continue transmitting data before receiving a response from an earlier transmission. `NO` by default
+
+ @see NSMutableURLRequest -setHTTPShouldUsePipelining:
+ */
+@property (nonatomic, assign) BOOL HTTPShouldUsePipelining;
+
+/**
+ The network service type for created requests. `NSURLNetworkServiceTypeDefault` by default.
+
+ @see NSMutableURLRequest -setNetworkServiceType:
+ */
+@property (nonatomic, assign) NSURLRequestNetworkServiceType networkServiceType;
+
+/**
+ The timeout interval, in seconds, for created requests. The default timeout interval is 60 seconds.
+
+ @see NSMutableURLRequest -setTimeoutInterval:
+ */
+@property (nonatomic, assign) NSTimeInterval timeoutInterval;
+
+///---------------------------------------
+/// @name Configuring HTTP Request Headers
+///---------------------------------------
+
+/**
+ Default HTTP header field values to be applied to serialized requests. By default, these include the following:
+
+ - `Accept-Language` with the contents of `NSLocale +preferredLanguages`
+ - `User-Agent` with the contents of various bundle identifiers and OS designations
+
+ @discussion To add or remove default request headers, use `setValue:forHTTPHeaderField:`.
+ */
+@property (readonly, nonatomic, strong) NSDictionary <NSString *, NSString *> *HTTPRequestHeaders;
+
+/**
+ Creates and returns a serializer with default configuration.
+ */
++ (instancetype)serializer;
+
+/**
+ Sets the value for the HTTP headers set in request objects made by the HTTP client. If `nil`, removes the existing value for that header.
+
+ @param field The HTTP header to set a default value for
+ @param value The value set as default for the specified header, or `nil`
+ */
+- (void)setValue:(nullable NSString *)value
+forHTTPHeaderField:(NSString *)field;
+
+/**
+ Returns the value for the HTTP headers set in the request serializer.
+
+ @param field The HTTP header to retrieve the default value for
+
+ @return The value set as default for the specified header, or `nil`
+ */
+- (nullable NSString *)valueForHTTPHeaderField:(NSString *)field;
+
+/**
+ Sets the "Authorization" HTTP header set in request objects made by the HTTP client to a basic authentication value with Base64-encoded username and password. This overwrites any existing value for this header.
+
+ @param username The HTTP basic auth username
+ @param password The HTTP basic auth password
+ */
+- (void)setAuthorizationHeaderFieldWithUsername:(NSString *)username
+                                       password:(NSString *)password;
+
+/**
+ Clears any existing value for the "Authorization" HTTP header.
+ */
+- (void)clearAuthorizationHeader;
+
+///-------------------------------------------------------
+/// @name Configuring Query String Parameter Serialization
+///-------------------------------------------------------
+
+/**
+ HTTP methods for which serialized requests will encode parameters as a query string. `GET`, `HEAD`, and `DELETE` by default.
+ */
+@property (nonatomic, strong) NSSet <NSString *> *HTTPMethodsEncodingParametersInURI;
+
+/**
+ Set the method of query string serialization according to one of the pre-defined styles.
+
+ @param style The serialization style.
+
+ @see AFHTTPRequestQueryStringSerializationStyle
+ */
+- (void)setQueryStringSerializationWithStyle:(AFHTTPRequestQueryStringSerializationStyle)style;
+
+/**
+ Set the a custom method of query string serialization according to the specified block.
+
+ @param block A block that defines a process of encoding parameters into a query string. This block returns the query string and takes three arguments: the request, the parameters to encode, and the error that occurred when attempting to encode parameters for the given request.
+ */
+- (void)setQueryStringSerializationWithBlock:(nullable NSString * (^)(NSURLRequest *request, id parameters, NSError * __autoreleasing *error))block;
+
+///-------------------------------
+/// @name Creating Request Objects
+///-------------------------------
+
+/**
+ Creates an `NSMutableURLRequest` object with the specified HTTP method and URL string.
+
+ If the HTTP method is `GET`, `HEAD`, or `DELETE`, the parameters will be used to construct a url-encoded query string that is appended to the request's URL. Otherwise, the parameters will be encoded according to the value of the `parameterEncoding` property, and set as the request body.
+
+ @param method The HTTP method for the request, such as `GET`, `POST`, `PUT`, or `DELETE`. This parameter must not be `nil`.
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be either set as a query string for `GET` requests, or the request HTTP body.
+ @param error The error that occurred while constructing the request.
+
+ @return An `NSMutableURLRequest` object.
+ */
+- (NSMutableURLRequest *)requestWithMethod:(NSString *)method
+                                 URLString:(NSString *)URLString
+                                parameters:(nullable id)parameters
+                                     error:(NSError * _Nullable __autoreleasing *)error;
+
+/**
+ Creates an `NSMutableURLRequest` object with the specified HTTP method and URLString, and constructs a `multipart/form-data` HTTP body, using the specified parameters and multipart form data block. See http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4.2
+
+ Multipart form requests are automatically streamed, reading files directly from disk along with in-memory data in a single HTTP body. The resulting `NSMutableURLRequest` object has an `HTTPBodyStream` property, so refrain from setting `HTTPBodyStream` or `HTTPBody` on this request object, as it will clear out the multipart form body stream.
+
+ @param method The HTTP method for the request. This parameter must not be `GET` or `HEAD`, or `nil`.
+ @param URLString The URL string used to create the request URL.
+ @param parameters The parameters to be encoded and set in the request HTTP body.
+ @param block A block that takes a single argument and appends data to the HTTP body. The block argument is an object adopting the `AFMultipartFormData` protocol.
+ @param error The error that occurred while constructing the request.
+
+ @return An `NSMutableURLRequest` object
+ */
+- (NSMutableURLRequest *)multipartFormRequestWithMethod:(NSString *)method
+                                              URLString:(NSString *)URLString
+                                             parameters:(nullable NSDictionary <NSString *, id> *)parameters
+                              constructingBodyWithBlock:(nullable void (^)(id <AFMultipartFormData> formData))block
+                                                  error:(NSError * _Nullable __autoreleasing *)error;
+
+/**
+ Creates an `NSMutableURLRequest` by removing the `HTTPBodyStream` from a request, and asynchronously writing its contents into the specified file, invoking the completion handler when finished.
+
+ @param request The multipart form request. The `HTTPBodyStream` property of `request` must not be `nil`.
+ @param fileURL The file URL to write multipart form contents to.
+ @param handler A handler block to execute.
+
+ @discussion There is a bug in `NSURLSessionTask` that causes requests to not send a `Content-Length` header when streaming contents from an HTTP body, which is notably problematic when interacting with the Amazon S3 webservice. As a workaround, this method takes a request constructed with `multipartFormRequestWithMethod:URLString:parameters:constructingBodyWithBlock:error:`, or any other request with an `HTTPBodyStream`, writes the contents to the specified file and returns a copy of the original request with the `HTTPBodyStream` property set to `nil`. From here, the file can either be passed to `AFURLSessionManager -uploadTaskWithRequest:fromFile:progress:completionHandler:`, or have its contents read into an `NSData` that's assigned to the `HTTPBody` property of the request.
+
+ @see https://github.com/AFNetworking/AFNetworking/issues/1398
+ */
+- (NSMutableURLRequest *)requestWithMultipartFormRequest:(NSURLRequest *)request
+                             writingStreamContentsToFile:(NSURL *)fileURL
+                                       completionHandler:(nullable void (^)(NSError * _Nullable error))handler;
+
+@end
+
+#pragma mark -
+
+/**
+ The `AFMultipartFormData` protocol defines the methods supported by the parameter in the block argument of `AFHTTPRequestSerializer -multipartFormRequestWithMethod:URLString:parameters:constructingBodyWithBlock:`.
+ */
+@protocol AFMultipartFormData
+
+/**
+ Appends the HTTP header `Content-Disposition: file; filename=#{generated filename}; name=#{name}"` and `Content-Type: #{generated mimeType}`, followed by the encoded file data and the multipart form boundary.
+
+ The filename and MIME type for this data in the form will be automatically generated, using the last path component of the `fileURL` and system associated MIME type for the `fileURL` extension, respectively.
+
+ @param fileURL The URL corresponding to the file whose content will be appended to the form. This parameter must not be `nil`.
+ @param name The name to be associated with the specified data. This parameter must not be `nil`.
+ @param error If an error occurs, upon return contains an `NSError` object that describes the problem.
+
+ @return `YES` if the file data was successfully appended, otherwise `NO`.
+ */
+- (BOOL)appendPartWithFileURL:(NSURL *)fileURL
+                         name:(NSString *)name
+                        error:(NSError * _Nullable __autoreleasing *)error;
+
+/**
+ Appends the HTTP header `Content-Disposition: file; filename=#{filename}; name=#{name}"` and `Content-Type: #{mimeType}`, followed by the encoded file data and the multipart form boundary.
+
+ @param fileURL The URL corresponding to the file whose content will be appended to the form. This parameter must not be `nil`.
+ @param name The name to be associated with the specified data. This parameter must not be `nil`.
+ @param fileName The file name to be used in the `Content-Disposition` header. This parameter must not be `nil`.
+ @param mimeType The declared MIME type of the file data. This parameter must not be `nil`.
+ @param error If an error occurs, upon return contains an `NSError` object that describes the problem.
+
+ @return `YES` if the file data was successfully appended otherwise `NO`.
+ */
+- (BOOL)appendPartWithFileURL:(NSURL *)fileURL
+                         name:(NSString *)name
+                     fileName:(NSString *)fileName
+                     mimeType:(NSString *)mimeType
+                        error:(NSError * _Nullable __autoreleasing *)error;
+
+/**
+ Appends the HTTP header `Content-Disposition: file; filename=#{filename}; name=#{name}"` and `Content-Type: #{mimeType}`, followed by the data from the input stream and the multipart form boundary.
+
+ @param inputStream The input stream to be appended to the form data
+ @param name The name to be associated with the specified input stream. This parameter must not be `nil`.
+ @param fileName The filename to be associated with the specified input stream. This parameter must not be `nil`.
+ @param length The length of the specified input stream in bytes.
+ @param mimeType The MIME type of the specified data. (For example, the MIME type for a JPEG image is image/jpeg.) For a list of valid MIME types, see http://www.iana.org/assignments/media-types/. This parameter must not be `nil`.
+ */
+- (void)appendPartWithInputStream:(nullable NSInputStream *)inputStream
+                             name:(NSString *)name
+                         fileName:(NSString *)fileName
+                           length:(int64_t)length
+                         mimeType:(NSString *)mimeType;
+
+/**
+ Appends the HTTP header `Content-Disposition: file; filename=#{filename}; name=#{name}"` and `Content-Type: #{mimeType}`, followed by the encoded file data and the multipart form boundary.
+
+ @param data The data to be encoded and appended to the form data.
+ @param name The name to be associated with the specified data. This parameter must not be `nil`.
+ @param fileName The filename to be associated with the specified data. This parameter must not be `nil`.
+ @param mimeType The MIME type of the specified data. (For example, the MIME type for a JPEG image is image/jpeg.) For a list of valid MIME types, see http://www.iana.org/assignments/media-types/. This parameter must not be `nil`.
+ */
+- (void)appendPartWithFileData:(NSData *)data
+                          name:(NSString *)name
+                      fileName:(NSString *)fileName
+                      mimeType:(NSString *)mimeType;
+
+/**
+ Appends the HTTP headers `Content-Disposition: form-data; name=#{name}"`, followed by the encoded data and the multipart form boundary.
+
+ @param data The data to be encoded and appended to the form data.
+ @param name The name to be associated with the specified data. This parameter must not be `nil`.
+ */
+
+- (void)appendPartWithFormData:(NSData *)data
+                          name:(NSString *)name;
+
+
+/**
+ Appends HTTP headers, followed by the encoded data and the multipart form boundary.
+
+ @param headers The HTTP headers to be appended to the form data.
+ @param body The data to be encoded and appended to the form data. This parameter must not be `nil`.
+ */
+- (void)appendPartWithHeaders:(nullable NSDictionary <NSString *, NSString *> *)headers
+                         body:(NSData *)body;
+
+/**
+ Throttles request bandwidth by limiting the packet size and adding a delay for each chunk read from the upload stream.
+
+ When uploading over a 3G or EDGE connection, requests may fail with "request body stream exhausted". Setting a maximum packet size and delay according to the recommended values (`kAFUploadStream3GSuggestedPacketSize` and `kAFUploadStream3GSuggestedDelay`) lowers the risk of the input stream exceeding its allocated bandwidth. Unfortunately, there is no definite way to distinguish between a 3G, EDGE, or LTE connection over `NSURLConnection`. As such, it is not recommended that you throttle bandwidth based solely on network reachability. Instead, you should consider checking for the "request body stream exhausted" in a failure block, and then retrying the request with throttled bandwidth.
+
+ @param numberOfBytes Maximum packet size, in number of bytes. The default packet size for an input stream is 16kb.
+ @param delay Duration of delay each time a packet is read. By default, no delay is set.
+ */
+- (void)throttleBandwidthWithPacketSize:(NSUInteger)numberOfBytes
+                                  delay:(NSTimeInterval)delay;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFJSONRequestSerializer` is a subclass of `AFHTTPRequestSerializer` that encodes parameters as JSON using `NSJSONSerialization`, setting the `Content-Type` of the encoded request to `application/json`.
+ */
+@interface AFJSONRequestSerializer : AFHTTPRequestSerializer
+
+/**
+ Options for writing the request JSON data from Foundation objects. For possible values, see the `NSJSONSerialization` documentation section "NSJSONWritingOptions". `0` by default.
+ */
+@property (nonatomic, assign) NSJSONWritingOptions writingOptions;
+
+/**
+ Creates and returns a JSON serializer with specified reading and writing options.
+
+ @param writingOptions The specified JSON writing options.
+ */
++ (instancetype)serializerWithWritingOptions:(NSJSONWritingOptions)writingOptions;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFPropertyListRequestSerializer` is a subclass of `AFHTTPRequestSerializer` that encodes parameters as JSON using `NSPropertyListSerializer`, setting the `Content-Type` of the encoded request to `application/x-plist`.
+ */
+@interface AFPropertyListRequestSerializer : AFHTTPRequestSerializer
+
+/**
+ The property list format. Possible values are described in "NSPropertyListFormat".
+ */
+@property (nonatomic, assign) NSPropertyListFormat format;
+
+/**
+ @warning The `writeOptions` property is currently unused.
+ */
+@property (nonatomic, assign) NSPropertyListWriteOptions writeOptions;
+
+/**
+ Creates and returns a property list serializer with a specified format, read options, and write options.
+
+ @param format The property list format.
+ @param writeOptions The property list write options.
+
+ @warning The `writeOptions` property is currently unused.
+ */
++ (instancetype)serializerWithFormat:(NSPropertyListFormat)format
+                        writeOptions:(NSPropertyListWriteOptions)writeOptions;
+
+@end
+
+#pragma mark -
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## Error Domains
+
+ The following error domain is predefined.
+
+ - `NSString * const AFURLRequestSerializationErrorDomain`
+
+ ### Constants
+
+ `AFURLRequestSerializationErrorDomain`
+ AFURLRequestSerializer errors. Error codes for `AFURLRequestSerializationErrorDomain` correspond to codes in `NSURLErrorDomain`.
+ */
+FOUNDATION_EXPORT NSString * const AFURLRequestSerializationErrorDomain;
+
+/**
+ ## User info dictionary keys
+
+ These keys may exist in the user info dictionary, in addition to those defined for NSError.
+
+ - `NSString * const AFNetworkingOperationFailingURLRequestErrorKey`
+
+ ### Constants
+
+ `AFNetworkingOperationFailingURLRequestErrorKey`
+ The corresponding value is an `NSURLRequest` containing the request of the operation associated with an error. This key is only present in the `AFURLRequestSerializationErrorDomain`.
+ */
+FOUNDATION_EXPORT NSString * const AFNetworkingOperationFailingURLRequestErrorKey;
+
+/**
+ ## Throttling Bandwidth for HTTP Request Input Streams
+
+ @see -throttleBandwidthWithPacketSize:delay:
+
+ ### Constants
+
+ `kAFUploadStream3GSuggestedPacketSize`
+ Maximum packet size, in number of bytes. Equal to 16kb.
+
+ `kAFUploadStream3GSuggestedDelay`
+ Duration of delay each time a packet is read. Equal to 0.2 seconds.
+ */
+FOUNDATION_EXPORT NSUInteger const kAFUploadStream3GSuggestedPacketSize;
+FOUNDATION_EXPORT NSTimeInterval const kAFUploadStream3GSuggestedDelay;
+
+NS_ASSUME_NONNULL_END
+// AFURLRequestSerialization.m
+// Copyright (c) 2011–2016 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 "AFURLRequestSerialization.h"
+
+#if TARGET_OS_IOS || TARGET_OS_WATCH || TARGET_OS_TV
+#import <MobileCoreServices/MobileCoreServices.h>
+#else
+#import <CoreServices/CoreServices.h>
+#endif
+
+NSString * const AFURLRequestSerializationErrorDomain = @"com.alamofire.error.serialization.request";
+NSString * const AFNetworkingOperationFailingURLRequestErrorKey = @"com.alamofire.serialization.request.error.response";
+
+typedef NSString * (^AFQueryStringSerializationBlock)(NSURLRequest *request, id parameters, NSError *__autoreleasing *error);
+
+/**
+ Returns a percent-escaped string following RFC 3986 for a query string key or value.
+ 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.
+    - parameter string: The string to be percent-escaped.
+    - returns: The percent-escaped string.
+ */
+NSString * AFPercentEscapedStringFromString(NSString *string) {
+    static NSString * const kAFCharactersGeneralDelimitersToEncode = @":#[]@"; // does not include "?" or "/" due to RFC 3986 - Section 3.4
+    static NSString * const kAFCharactersSubDelimitersToEncode = @"!$&'()*+,;=";
+
+    NSMutableCharacterSet * allowedCharacterSet = [[NSCharacterSet URLQueryAllowedCharacterSet] mutableCopy];
+    [allowedCharacterSet removeCharactersInString:[kAFCharactersGeneralDelimitersToEncode stringByAppendingString:kAFCharactersSubDelimitersToEncode]];
+
+	// FIXME: https://github.com/AFNetworking/AFNetworking/pull/3028
+    // return [string stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacterSet];
+
+    static NSUInteger const batchSize = 50;
+
+    NSUInteger index = 0;
+    NSMutableString *escaped = @"".mutableCopy;
+
+    while (index < string.length) {
+        NSUInteger length = MIN(string.length - index, batchSize);
+        NSRange range = NSMakeRange(index, length);
+
+        // To avoid breaking up character sequences such as 👴🏻👮🏽
+        range = [string rangeOfComposedCharacterSequencesForRange:range];
+
+        NSString *substring = [string substringWithRange:range];
+        NSString *encoded = [substring stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacterSet];
+        [escaped appendString:encoded];
+
+        index += range.length;
+    }
+
+	return escaped;
+}
+
+#pragma mark -
+
+@interface AFQueryStringPair : NSObject
+@property (readwrite, nonatomic, strong) id field;
+@property (readwrite, nonatomic, strong) id value;
+
+- (instancetype)initWithField:(id)field value:(id)value;
+
+- (NSString *)URLEncodedStringValue;
+@end
+
+@implementation AFQueryStringPair
+
+- (instancetype)initWithField:(id)field value:(id)value {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.field = field;
+    self.value = value;
+
+    return self;
+}
+
+- (NSString *)URLEncodedStringValue {
+    if (!self.value || [self.value isEqual:[NSNull null]]) {
+        return AFPercentEscapedStringFromString([self.field description]);
+    } else {
+        return [NSString stringWithFormat:@"%@=%@", AFPercentEscapedStringFromString([self.field description]), AFPercentEscapedStringFromString([self.value description])];
+    }
+}
+
+@end
+
+#pragma mark -
+
+FOUNDATION_EXPORT NSArray * AFQueryStringPairsFromDictionary(NSDictionary *dictionary);
+FOUNDATION_EXPORT NSArray * AFQueryStringPairsFromKeyAndValue(NSString *key, id value);
+
+NSString * AFQueryStringFromParameters(NSDictionary *parameters) {
+    NSMutableArray *mutablePairs = [NSMutableArray array];
+    for (AFQueryStringPair *pair in AFQueryStringPairsFromDictionary(parameters)) {
+        [mutablePairs addObject:[pair URLEncodedStringValue]];
+    }
+
+    return [mutablePairs componentsJoinedByString:@"&"];
+}
+
+NSArray * AFQueryStringPairsFromDictionary(NSDictionary *dictionary) {
+    return AFQueryStringPairsFromKeyAndValue(nil, dictionary);
+}
+
+NSArray * AFQueryStringPairsFromKeyAndValue(NSString *key, id value) {
+    NSMutableArray *mutableQueryStringComponents = [NSMutableArray array];
+
+    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"description" ascending:YES selector:@selector(compare:)];
+
+    if ([value isKindOfClass:[NSDictionary class]]) {
+        NSDictionary *dictionary = value;
+        // Sort dictionary keys to ensure consistent ordering in query string, which is important when deserializing potentially ambiguous sequences, such as an array of dictionaries
+        for (id nestedKey in [dictionary.allKeys sortedArrayUsingDescriptors:@[ sortDescriptor ]]) {
+            id nestedValue = dictionary[nestedKey];
+            if (nestedValue) {
+                [mutableQueryStringComponents addObjectsFromArray:AFQueryStringPairsFromKeyAndValue((key ? [NSString stringWithFormat:@"%@[%@]", key, nestedKey] : nestedKey), nestedValue)];
+            }
+        }
+    } else if ([value isKindOfClass:[NSArray class]]) {
+        NSArray *array = value;
+        for (id nestedValue in array) {
+            [mutableQueryStringComponents addObjectsFromArray:AFQueryStringPairsFromKeyAndValue([NSString stringWithFormat:@"%@[]", key], nestedValue)];
+        }
+    } else if ([value isKindOfClass:[NSSet class]]) {
+        NSSet *set = value;
+        for (id obj in [set sortedArrayUsingDescriptors:@[ sortDescriptor ]]) {
+            [mutableQueryStringComponents addObjectsFromArray:AFQueryStringPairsFromKeyAndValue(key, obj)];
+        }
+    } else {
+        [mutableQueryStringComponents addObject:[[AFQueryStringPair alloc] initWithField:key value:value]];
+    }
+
+    return mutableQueryStringComponents;
+}
+
+#pragma mark -
+
+@interface AFStreamingMultipartFormData : NSObject <AFMultipartFormData>
+- (instancetype)initWithURLRequest:(NSMutableURLRequest *)urlRequest
+                    stringEncoding:(NSStringEncoding)encoding;
+
+- (NSMutableURLRequest *)requestByFinalizingMultipartFormData;
+@end
+
+#pragma mark -
+
+static NSArray * AFHTTPRequestSerializerObservedKeyPaths() {
+    static NSArray *_AFHTTPRequestSerializerObservedKeyPaths = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        _AFHTTPRequestSerializerObservedKeyPaths = @[NSStringFromSelector(@selector(allowsCellularAccess)), NSStringFromSelector(@selector(cachePolicy)), NSStringFromSelector(@selector(HTTPShouldHandleCookies)), NSStringFromSelector(@selector(HTTPShouldUsePipelining)), NSStringFromSelector(@selector(networkServiceType)), NSStringFromSelector(@selector(timeoutInterval))];
+    });
+
+    return _AFHTTPRequestSerializerObservedKeyPaths;
+}
+
+static void *AFHTTPRequestSerializerObserverContext = &AFHTTPRequestSerializerObserverContext;
+
+@interface AFHTTPRequestSerializer ()
+@property (readwrite, nonatomic, strong) NSMutableSet *mutableObservedChangedKeyPaths;
+@property (readwrite, nonatomic, strong) NSMutableDictionary *mutableHTTPRequestHeaders;
+@property (readwrite, nonatomic, strong) dispatch_queue_t requestHeaderModificationQueue;
+@property (readwrite, nonatomic, assign) AFHTTPRequestQueryStringSerializationStyle queryStringSerializationStyle;
+@property (readwrite, nonatomic, copy) AFQueryStringSerializationBlock queryStringSerialization;
+@end
+
+@implementation AFHTTPRequestSerializer
+
++ (instancetype)serializer {
+    return [[self alloc] init];
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.stringEncoding = NSUTF8StringEncoding;
+
+    self.mutableHTTPRequestHeaders = [NSMutableDictionary dictionary];
+    self.requestHeaderModificationQueue = dispatch_queue_create("requestHeaderModificationQueue", DISPATCH_QUEUE_CONCURRENT);
+
+    // Accept-Language HTTP Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
+    NSMutableArray *acceptLanguagesComponents = [NSMutableArray array];
+    [[NSLocale preferredLanguages] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
+        float q = 1.0f - (idx * 0.1f);
+        [acceptLanguagesComponents addObject:[NSString stringWithFormat:@"%@;q=%0.1g", obj, q]];
+        *stop = q <= 0.5f;
+    }];
+    [self setValue:[acceptLanguagesComponents componentsJoinedByString:@", "] forHTTPHeaderField:@"Accept-Language"];
+
+    NSString *userAgent = nil;
+#if TARGET_OS_IOS
+    // User-Agent Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.43
+    userAgent = [NSString stringWithFormat:@"%@/%@ (%@; iOS %@; Scale/%0.2f)", [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleExecutableKey] ?: [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleIdentifierKey], [[NSBundle mainBundle] infoDictionary][@"CFBundleShortVersionString"] ?: [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleVersionKey], [[UIDevice currentDevice] model], [[UIDevice currentDevice] systemVersion], [[UIScreen mainScreen] scale]];
+#elif TARGET_OS_WATCH
+    // User-Agent Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.43
+    userAgent = [NSString stringWithFormat:@"%@/%@ (%@; watchOS %@; Scale/%0.2f)", [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleExecutableKey] ?: [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleIdentifierKey], [[NSBundle mainBundle] infoDictionary][@"CFBundleShortVersionString"] ?: [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleVersionKey], [[WKInterfaceDevice currentDevice] model], [[WKInterfaceDevice currentDevice] systemVersion], [[WKInterfaceDevice currentDevice] screenScale]];
+#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
+    userAgent = [NSString stringWithFormat:@"%@/%@ (Mac OS X %@)", [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleExecutableKey] ?: [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleIdentifierKey], [[NSBundle mainBundle] infoDictionary][@"CFBundleShortVersionString"] ?: [[NSBundle mainBundle] infoDictionary][(__bridge NSString *)kCFBundleVersionKey], [[NSProcessInfo processInfo] operatingSystemVersionString]];
+#endif
+    if (userAgent) {
+        if (![userAgent canBeConvertedToEncoding:NSASCIIStringEncoding]) {
+            NSMutableString *mutableUserAgent = [userAgent mutableCopy];
+            if (CFStringTransform((__bridge CFMutableStringRef)(mutableUserAgent), NULL, (__bridge CFStringRef)@"Any-Latin; Latin-ASCII; [:^ASCII:] Remove", false)) {
+                userAgent = mutableUserAgent;
+            }
+        }
+        [self setValue:userAgent forHTTPHeaderField:@"User-Agent"];
+    }
+
+    // HTTP Method Definitions; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html
+    self.HTTPMethodsEncodingParametersInURI = [NSSet setWithObjects:@"GET", @"HEAD", @"DELETE", nil];
+
+    self.mutableObservedChangedKeyPaths = [NSMutableSet set];
+    for (NSString *keyPath in AFHTTPRequestSerializerObservedKeyPaths()) {
+        if ([self respondsToSelector:NSSelectorFromString(keyPath)]) {
+            [self addObserver:self forKeyPath:keyPath options:NSKeyValueObservingOptionNew context:AFHTTPRequestSerializerObserverContext];
+        }
+    }
+
+    return self;
+}
+
+- (void)dealloc {
+    for (NSString *keyPath in AFHTTPRequestSerializerObservedKeyPaths()) {
+        if ([self respondsToSelector:NSSelectorFromString(keyPath)]) {
+            [self removeObserver:self forKeyPath:keyPath context:AFHTTPRequestSerializerObserverContext];
+        }
+    }
+}
+
+#pragma mark -
+
+// Workarounds for crashing behavior using Key-Value Observing with XCTest
+// See https://github.com/AFNetworking/AFNetworking/issues/2523
+
+- (void)setAllowsCellularAccess:(BOOL)allowsCellularAccess {
+    [self willChangeValueForKey:NSStringFromSelector(@selector(allowsCellularAccess))];
+    _allowsCellularAccess = allowsCellularAccess;
+    [self didChangeValueForKey:NSStringFromSelector(@selector(allowsCellularAccess))];
+}
+
+- (void)setCachePolicy:(NSURLRequestCachePolicy)cachePolicy {
+    [self willChangeValueForKey:NSStringFromSelector(@selector(cachePolicy))];
+    _cachePolicy = cachePolicy;
+    [self didChangeValueForKey:NSStringFromSelector(@selector(cachePolicy))];
+}
+
+- (void)setHTTPShouldHandleCookies:(BOOL)HTTPShouldHandleCookies {
+    [self willChangeValueForKey:NSStringFromSelector(@selector(HTTPShouldHandleCookies))];
+    _HTTPShouldHandleCookies = HTTPShouldHandleCookies;
+    [self didChangeValueForKey:NSStringFromSelector(@selector(HTTPShouldHandleCookies))];
+}
+
+- (void)setHTTPShouldUsePipelining:(BOOL)HTTPShouldUsePipelining {
+    [self willChangeValueForKey:NSStringFromSelector(@selector(HTTPShouldUsePipelining))];
+    _HTTPShouldUsePipelining = HTTPShouldUsePipelining;
+    [self didChangeValueForKey:NSStringFromSelector(@selector(HTTPShouldUsePipelining))];
+}
+
+- (void)setNetworkServiceType:(NSURLRequestNetworkServiceType)networkServiceType {
+    [self willChangeValueForKey:NSStringFromSelector(@selector(networkServiceType))];
+    _networkServiceType = networkServiceType;
+    [self didChangeValueForKey:NSStringFromSelector(@selector(networkServiceType))];
+}
+
+- (void)setTimeoutInterval:(NSTimeInterval)timeoutInterval {
+    [self willChangeValueForKey:NSStringFromSelector(@selector(timeoutInterval))];
+    _timeoutInterval = timeoutInterval;
+    [self didChangeValueForKey:NSStringFromSelector(@selector(timeoutInterval))];
+}
+
+#pragma mark -
+
+- (NSDictionary *)HTTPRequestHeaders {
+    NSDictionary __block *value;
+    dispatch_sync(self.requestHeaderModificationQueue, ^{
+        value = [NSDictionary dictionaryWithDictionary:self.mutableHTTPRequestHeaders];
+    });
+    return value;
+}
+
+- (void)setValue:(NSString *)value
+forHTTPHeaderField:(NSString *)field
+{
+    dispatch_barrier_async(self.requestHeaderModificationQueue, ^{
+        [self.mutableHTTPRequestHeaders setValue:value forKey:field];
+    });
+}
+
+- (NSString *)valueForHTTPHeaderField:(NSString *)field {
+    NSString __block *value;
+    dispatch_sync(self.requestHeaderModificationQueue, ^{
+        value = [self.mutableHTTPRequestHeaders valueForKey:field];
+    });
+    return value;
+}
+
+- (void)setAuthorizationHeaderFieldWithUsername:(NSString *)username
+                                       password:(NSString *)password
+{
+    NSData *basicAuthCredentials = [[NSString stringWithFormat:@"%@:%@", username, password] dataUsingEncoding:NSUTF8StringEncoding];
+    NSString *base64AuthCredentials = [basicAuthCredentials base64EncodedStringWithOptions:(NSDataBase64EncodingOptions)0];
+    [self setValue:[NSString stringWithFormat:@"Basic %@", base64AuthCredentials] forHTTPHeaderField:@"Authorization"];
+}
+
+- (void)clearAuthorizationHeader {
+    dispatch_barrier_async(self.requestHeaderModificationQueue, ^{
+        [self.mutableHTTPRequestHeaders removeObjectForKey:@"Authorization"];
+    });
+}
+
+#pragma mark -
+
+- (void)setQueryStringSerializationWithStyle:(AFHTTPRequestQueryStringSerializationStyle)style {
+    self.queryStringSerializationStyle = style;
+    self.queryStringSerialization = nil;
+}
+
+- (void)setQueryStringSerializationWithBlock:(NSString *(^)(NSURLRequest *, id, NSError *__autoreleasing *))block {
+    self.queryStringSerialization = block;
+}
+
+#pragma mark -
+
+- (NSMutableURLRequest *)requestWithMethod:(NSString *)method
+                                 URLString:(NSString *)URLString
+                                parameters:(id)parameters
+                                     error:(NSError *__autoreleasing *)error
+{
+    NSParameterAssert(method);
+    NSParameterAssert(URLString);
+
+    NSURL *url = [NSURL URLWithString:URLString];
+
+    NSParameterAssert(url);
+
+    NSMutableURLRequest *mutableRequest = [[NSMutableURLRequest alloc] initWithURL:url];
+    mutableRequest.HTTPMethod = method;
+
+    for (NSString *keyPath in AFHTTPRequestSerializerObservedKeyPaths()) {
+        if ([self.mutableObservedChangedKeyPaths containsObject:keyPath]) {
+            [mutableRequest setValue:[self valueForKeyPath:keyPath] forKey:keyPath];
+        }
+    }
+
+    mutableRequest = [[self requestBySerializingRequest:mutableRequest withParameters:parameters error:error] mutableCopy];
+
+	return mutableRequest;
+}
+
+- (NSMutableURLRequest *)multipartFormRequestWithMethod:(NSString *)method
+                                              URLString:(NSString *)URLString
+                                             parameters:(NSDictionary *)parameters
+                              constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block
+                                                  error:(NSError *__autoreleasing *)error
+{
+    NSParameterAssert(method);
+    NSParameterAssert(![method isEqualToString:@"GET"] && ![method isEqualToString:@"HEAD"]);
+
+    NSMutableURLRequest *mutableRequest = [self requestWithMethod:method URLString:URLString parameters:nil error:error];
+
+    __block AFStreamingMultipartFormData *formData = [[AFStreamingMultipartFormData alloc] initWithURLRequest:mutableRequest stringEncoding:NSUTF8StringEncoding];
+
+    if (parameters) {
+        for (AFQueryStringPair *pair in AFQueryStringPairsFromDictionary(parameters)) {
+            NSData *data = nil;
+            if ([pair.value isKindOfClass:[NSData class]]) {
+                data = pair.value;
+            } else if ([pair.value isEqual:[NSNull null]]) {
+                data = [NSData data];
+            } else {
+                data = [[pair.value description] dataUsingEncoding:self.stringEncoding];
+            }
+
+            if (data) {
+                [formData appendPartWithFormData:data name:[pair.field description]];
+            }
+        }
+    }
+
+    if (block) {
+        block(formData);
+    }
+
+    return [formData requestByFinalizingMultipartFormData];
+}
+
+- (NSMutableURLRequest *)requestWithMultipartFormRequest:(NSURLRequest *)request
+                             writingStreamContentsToFile:(NSURL *)fileURL
+                                       completionHandler:(void (^)(NSError *error))handler
+{
+    NSParameterAssert(request.HTTPBodyStream);
+    NSParameterAssert([fileURL isFileURL]);
+
+    NSInputStream *inputStream = request.HTTPBodyStream;
+    NSOutputStream *outputStream = [[NSOutputStream alloc] initWithURL:fileURL append:NO];
+    __block NSError *error = nil;
+
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+        [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
+        [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
+
+        [inputStream open];
+        [outputStream open];
+
+        while ([inputStream hasBytesAvailable] && [outputStream hasSpaceAvailable]) {
+            uint8_t buffer[1024];
+
+            NSInteger bytesRead = [inputStream read:buffer maxLength:1024];
+            if (inputStream.streamError || bytesRead < 0) {
+                error = inputStream.streamError;
+                break;
+            }
+
+            NSInteger bytesWritten = [outputStream write:buffer maxLength:(NSUInteger)bytesRead];
+            if (outputStream.streamError || bytesWritten < 0) {
+                error = outputStream.streamError;
+                break;
+            }
+
+            if (bytesRead == 0 && bytesWritten == 0) {
+                break;
+            }
+        }
+
+        [outputStream close];
+        [inputStream close];
+
+        if (handler) {
+            dispatch_async(dispatch_get_main_queue(), ^{
+                handler(error);
+            });
+        }
+    });
+
+    NSMutableURLRequest *mutableRequest = [request mutableCopy];
+    mutableRequest.HTTPBodyStream = nil;
+
+    return mutableRequest;
+}
+
+#pragma mark - AFURLRequestSerialization
+
+- (NSURLRequest *)requestBySerializingRequest:(NSURLRequest *)request
+                               withParameters:(id)parameters
+                                        error:(NSError *__autoreleasing *)error
+{
+    NSParameterAssert(request);
+
+    NSMutableURLRequest *mutableRequest = [request mutableCopy];
+
+    [self.HTTPRequestHeaders enumerateKeysAndObjectsUsingBlock:^(id field, id value, BOOL * __unused stop) {
+        if (![request valueForHTTPHeaderField:field]) {
+            [mutableRequest setValue:value forHTTPHeaderField:field];
+        }
+    }];
+
+    NSString *query = nil;
+    if (parameters) {
+        if (self.queryStringSerialization) {
+            NSError *serializationError;
+            query = self.queryStringSerialization(request, parameters, &serializationError);
+
+            if (serializationError) {
+                if (error) {
+                    *error = serializationError;
+                }
+
+                return nil;
+            }
+        } else {
+            switch (self.queryStringSerializationStyle) {
+                case AFHTTPRequestQueryStringDefaultStyle:
+                    query = AFQueryStringFromParameters(parameters);
+                    break;
+            }
+        }
+    }
+
+    if ([self.HTTPMethodsEncodingParametersInURI containsObject:[[request HTTPMethod] uppercaseString]]) {
+        if (query && query.length > 0) {
+            mutableRequest.URL = [NSURL URLWithString:[[mutableRequest.URL absoluteString] stringByAppendingFormat:mutableRequest.URL.query ? @"&%@" : @"?%@", query]];
+        }
+    } else {
+        // #2864: an empty string is a valid x-www-form-urlencoded payload
+        if (!query) {
+            query = @"";
+        }
+        if (![mutableRequest valueForHTTPHeaderField:@"Content-Type"]) {
+            [mutableRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
+        }
+        [mutableRequest setHTTPBody:[query dataUsingEncoding:self.stringEncoding]];
+    }
+
+    return mutableRequest;
+}
+
+#pragma mark - NSKeyValueObserving
+
++ (BOOL)automaticallyNotifiesObserversForKey:(NSString *)key {
+    if ([AFHTTPRequestSerializerObservedKeyPaths() containsObject:key]) {
+        return NO;
+    }
+
+    return [super automaticallyNotifiesObserversForKey:key];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(__unused id)object
+                        change:(NSDictionary *)change
+                       context:(void *)context
+{
+    if (context == AFHTTPRequestSerializerObserverContext) {
+        if ([change[NSKeyValueChangeNewKey] isEqual:[NSNull null]]) {
+            [self.mutableObservedChangedKeyPaths removeObject:keyPath];
+        } else {
+            [self.mutableObservedChangedKeyPaths addObject:keyPath];
+        }
+    }
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [self init];
+    if (!self) {
+        return nil;
+    }
+
+    self.mutableHTTPRequestHeaders = [[decoder decodeObjectOfClass:[NSDictionary class] forKey:NSStringFromSelector(@selector(mutableHTTPRequestHeaders))] mutableCopy];
+    self.queryStringSerializationStyle = (AFHTTPRequestQueryStringSerializationStyle)[[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(queryStringSerializationStyle))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    dispatch_sync(self.requestHeaderModificationQueue, ^{
+        [coder encodeObject:self.mutableHTTPRequestHeaders forKey:NSStringFromSelector(@selector(mutableHTTPRequestHeaders))];
+    });
+    [coder encodeInteger:self.queryStringSerializationStyle forKey:NSStringFromSelector(@selector(queryStringSerializationStyle))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFHTTPRequestSerializer *serializer = [[[self class] allocWithZone:zone] init];
+    dispatch_sync(self.requestHeaderModificationQueue, ^{
+        serializer.mutableHTTPRequestHeaders = [self.mutableHTTPRequestHeaders mutableCopyWithZone:zone];
+    });
+    serializer.queryStringSerializationStyle = self.queryStringSerializationStyle;
+    serializer.queryStringSerialization = self.queryStringSerialization;
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+static NSString * AFCreateMultipartFormBoundary() {
+    return [NSString stringWithFormat:@"Boundary+%08X%08X", arc4random(), arc4random()];
+}
+
+static NSString * const kAFMultipartFormCRLF = @"\r\n";
+
+static inline NSString * AFMultipartFormInitialBoundary(NSString *boundary) {
+    return [NSString stringWithFormat:@"--%@%@", boundary, kAFMultipartFormCRLF];
+}
+
+static inline NSString * AFMultipartFormEncapsulationBoundary(NSString *boundary) {
+    return [NSString stringWithFormat:@"%@--%@%@", kAFMultipartFormCRLF, boundary, kAFMultipartFormCRLF];
+}
+
+static inline NSString * AFMultipartFormFinalBoundary(NSString *boundary) {
+    return [NSString stringWithFormat:@"%@--%@--%@", kAFMultipartFormCRLF, boundary, kAFMultipartFormCRLF];
+}
+
+static inline NSString * AFContentTypeForPathExtension(NSString *extension) {
+    NSString *UTI = (__bridge_transfer NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)extension, NULL);
+    NSString *contentType = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)UTI, kUTTagClassMIMEType);
+    if (!contentType) {
+        return @"application/octet-stream";
+    } else {
+        return contentType;
+    }
+}
+
+NSUInteger const kAFUploadStream3GSuggestedPacketSize = 1024 * 16;
+NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
+
+@interface AFHTTPBodyPart : NSObject
+@property (nonatomic, assign) NSStringEncoding stringEncoding;
+@property (nonatomic, strong) NSDictionary *headers;
+@property (nonatomic, copy) NSString *boundary;
+@property (nonatomic, strong) id body;
+@property (nonatomic, assign) unsigned long long bodyContentLength;
+@property (nonatomic, strong) NSInputStream *inputStream;
+
+@property (nonatomic, assign) BOOL hasInitialBoundary;
+@property (nonatomic, assign) BOOL hasFinalBoundary;
+
+@property (readonly, nonatomic, assign, getter = hasBytesAvailable) BOOL bytesAvailable;
+@property (readonly, nonatomic, assign) unsigned long long contentLength;
+
+- (NSInteger)read:(uint8_t *)buffer
+        maxLength:(NSUInteger)length;
+@end
+
+@interface AFMultipartBodyStream : NSInputStream <NSStreamDelegate>
+@property (nonatomic, assign) NSUInteger numberOfBytesInPacket;
+@property (nonatomic, assign) NSTimeInterval delay;
+@property (nonatomic, strong) NSInputStream *inputStream;
+@property (readonly, nonatomic, assign) unsigned long long contentLength;
+@property (readonly, nonatomic, assign, getter = isEmpty) BOOL empty;
+
+- (instancetype)initWithStringEncoding:(NSStringEncoding)encoding;
+- (void)setInitialAndFinalBoundaries;
+- (void)appendHTTPBodyPart:(AFHTTPBodyPart *)bodyPart;
+@end
+
+#pragma mark -
+
+@interface AFStreamingMultipartFormData ()
+@property (readwrite, nonatomic, copy) NSMutableURLRequest *request;
+@property (readwrite, nonatomic, assign) NSStringEncoding stringEncoding;
+@property (readwrite, nonatomic, copy) NSString *boundary;
+@property (readwrite, nonatomic, strong) AFMultipartBodyStream *bodyStream;
+@end
+
+@implementation AFStreamingMultipartFormData
+
+- (instancetype)initWithURLRequest:(NSMutableURLRequest *)urlRequest
+                    stringEncoding:(NSStringEncoding)encoding
+{
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.request = urlRequest;
+    self.stringEncoding = encoding;
+    self.boundary = AFCreateMultipartFormBoundary();
+    self.bodyStream = [[AFMultipartBodyStream alloc] initWithStringEncoding:encoding];
+
+    return self;
+}
+
+- (void)setRequest:(NSMutableURLRequest *)request
+{
+    _request = [request mutableCopy];
+}
+
+- (BOOL)appendPartWithFileURL:(NSURL *)fileURL
+                         name:(NSString *)name
+                        error:(NSError * __autoreleasing *)error
+{
+    NSParameterAssert(fileURL);
+    NSParameterAssert(name);
+
+    NSString *fileName = [fileURL lastPathComponent];
+    NSString *mimeType = AFContentTypeForPathExtension([fileURL pathExtension]);
+
+    return [self appendPartWithFileURL:fileURL name:name fileName:fileName mimeType:mimeType error:error];
+}
+
+- (BOOL)appendPartWithFileURL:(NSURL *)fileURL
+                         name:(NSString *)name
+                     fileName:(NSString *)fileName
+                     mimeType:(NSString *)mimeType
+                        error:(NSError * __autoreleasing *)error
+{
+    NSParameterAssert(fileURL);
+    NSParameterAssert(name);
+    NSParameterAssert(fileName);
+    NSParameterAssert(mimeType);
+
+    if (![fileURL isFileURL]) {
+        NSDictionary *userInfo = @{NSLocalizedFailureReasonErrorKey: NSLocalizedStringFromTable(@"Expected URL to be a file URL", @"AFNetworking", nil)};
+        if (error) {
+            *error = [[NSError alloc] initWithDomain:AFURLRequestSerializationErrorDomain code:NSURLErrorBadURL userInfo:userInfo];
+        }
+
+        return NO;
+    } else if ([fileURL checkResourceIsReachableAndReturnError:error] == NO) {
+        NSDictionary *userInfo = @{NSLocalizedFailureReasonErrorKey: NSLocalizedStringFromTable(@"File URL not reachable.", @"AFNetworking", nil)};
+        if (error) {
+            *error = [[NSError alloc] initWithDomain:AFURLRequestSerializationErrorDomain code:NSURLErrorBadURL userInfo:userInfo];
+        }
+
+        return NO;
+    }
+
+    NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:[fileURL path] error:error];
+    if (!fileAttributes) {
+        return NO;
+    }
+
+    NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
+    [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"; filename=\"%@\"", name, fileName] forKey:@"Content-Disposition"];
+    [mutableHeaders setValue:mimeType forKey:@"Content-Type"];
+
+    AFHTTPBodyPart *bodyPart = [[AFHTTPBodyPart alloc] init];
+    bodyPart.stringEncoding = self.stringEncoding;
+    bodyPart.headers = mutableHeaders;
+    bodyPart.boundary = self.boundary;
+    bodyPart.body = fileURL;
+    bodyPart.bodyContentLength = [fileAttributes[NSFileSize] unsignedLongLongValue];
+    [self.bodyStream appendHTTPBodyPart:bodyPart];
+
+    return YES;
+}
+
+- (void)appendPartWithInputStream:(NSInputStream *)inputStream
+                             name:(NSString *)name
+                         fileName:(NSString *)fileName
+                           length:(int64_t)length
+                         mimeType:(NSString *)mimeType
+{
+    NSParameterAssert(name);
+    NSParameterAssert(fileName);
+    NSParameterAssert(mimeType);
+
+    NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
+    [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"; filename=\"%@\"", name, fileName] forKey:@"Content-Disposition"];
+    [mutableHeaders setValue:mimeType forKey:@"Content-Type"];
+
+    AFHTTPBodyPart *bodyPart = [[AFHTTPBodyPart alloc] init];
+    bodyPart.stringEncoding = self.stringEncoding;
+    bodyPart.headers = mutableHeaders;
+    bodyPart.boundary = self.boundary;
+    bodyPart.body = inputStream;
+
+    bodyPart.bodyContentLength = (unsigned long long)length;
+
+    [self.bodyStream appendHTTPBodyPart:bodyPart];
+}
+
+- (void)appendPartWithFileData:(NSData *)data
+                          name:(NSString *)name
+                      fileName:(NSString *)fileName
+                      mimeType:(NSString *)mimeType
+{
+    NSParameterAssert(name);
+    NSParameterAssert(fileName);
+    NSParameterAssert(mimeType);
+
+    NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
+    [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"; filename=\"%@\"", name, fileName] forKey:@"Content-Disposition"];
+    [mutableHeaders setValue:mimeType forKey:@"Content-Type"];
+
+    [self appendPartWithHeaders:mutableHeaders body:data];
+}
+
+- (void)appendPartWithFormData:(NSData *)data
+                          name:(NSString *)name
+{
+    NSParameterAssert(name);
+
+    NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
+    [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"", name] forKey:@"Content-Disposition"];
+
+    [self appendPartWithHeaders:mutableHeaders body:data];
+}
+
+- (void)appendPartWithHeaders:(NSDictionary *)headers
+                         body:(NSData *)body
+{
+    NSParameterAssert(body);
+
+    AFHTTPBodyPart *bodyPart = [[AFHTTPBodyPart alloc] init];
+    bodyPart.stringEncoding = self.stringEncoding;
+    bodyPart.headers = headers;
+    bodyPart.boundary = self.boundary;
+    bodyPart.bodyContentLength = [body length];
+    bodyPart.body = body;
+
+    [self.bodyStream appendHTTPBodyPart:bodyPart];
+}
+
+- (void)throttleBandwidthWithPacketSize:(NSUInteger)numberOfBytes
+                                  delay:(NSTimeInterval)delay
+{
+    self.bodyStream.numberOfBytesInPacket = numberOfBytes;
+    self.bodyStream.delay = delay;
+}
+
+- (NSMutableURLRequest *)requestByFinalizingMultipartFormData {
+    if ([self.bodyStream isEmpty]) {
+        return self.request;
+    }
+
+    // Reset the initial and final boundaries to ensure correct Content-Length
+    [self.bodyStream setInitialAndFinalBoundaries];
+    [self.request setHTTPBodyStream:self.bodyStream];
+
+    [self.request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", self.boundary] forHTTPHeaderField:@"Content-Type"];
+    [self.request setValue:[NSString stringWithFormat:@"%llu", [self.bodyStream contentLength]] forHTTPHeaderField:@"Content-Length"];
+
+    return self.request;
+}
+
+@end
+
+#pragma mark -
+
+@interface NSStream ()
+@property (readwrite) NSStreamStatus streamStatus;
+@property (readwrite, copy) NSError *streamError;
+@end
+
+@interface AFMultipartBodyStream () <NSCopying>
+@property (readwrite, nonatomic, assign) NSStringEncoding stringEncoding;
+@property (readwrite, nonatomic, strong) NSMutableArray *HTTPBodyParts;
+@property (readwrite, nonatomic, strong) NSEnumerator *HTTPBodyPartEnumerator;
+@property (readwrite, nonatomic, strong) AFHTTPBodyPart *currentHTTPBodyPart;
+@property (readwrite, nonatomic, strong) NSOutputStream *outputStream;
+@property (readwrite, nonatomic, strong) NSMutableData *buffer;
+@end
+
+@implementation AFMultipartBodyStream
+#if (defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000) || (defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && __MAC_OS_X_VERSION_MAX_ALLOWED >= 1100)
+@synthesize delegate;
+#endif
+@synthesize streamStatus;
+@synthesize streamError;
+
+- (instancetype)initWithStringEncoding:(NSStringEncoding)encoding {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.stringEncoding = encoding;
+    self.HTTPBodyParts = [NSMutableArray array];
+    self.numberOfBytesInPacket = NSIntegerMax;
+
+    return self;
+}
+
+- (void)setInitialAndFinalBoundaries {
+    if ([self.HTTPBodyParts count] > 0) {
+        for (AFHTTPBodyPart *bodyPart in self.HTTPBodyParts) {
+            bodyPart.hasInitialBoundary = NO;
+            bodyPart.hasFinalBoundary = NO;
+        }
+
+        [[self.HTTPBodyParts firstObject] setHasInitialBoundary:YES];
+        [[self.HTTPBodyParts lastObject] setHasFinalBoundary:YES];
+    }
+}
+
+- (void)appendHTTPBodyPart:(AFHTTPBodyPart *)bodyPart {
+    [self.HTTPBodyParts addObject:bodyPart];
+}
+
+- (BOOL)isEmpty {
+    return [self.HTTPBodyParts count] == 0;
+}
+
+#pragma mark - NSInputStream
+
+- (NSInteger)read:(uint8_t *)buffer
+        maxLength:(NSUInteger)length
+{
+    if ([self streamStatus] == NSStreamStatusClosed) {
+        return 0;
+    }
+
+    NSInteger totalNumberOfBytesRead = 0;
+
+    while ((NSUInteger)totalNumberOfBytesRead < MIN(length, self.numberOfBytesInPacket)) {
+        if (!self.currentHTTPBodyPart || ![self.currentHTTPBodyPart hasBytesAvailable]) {
+            if (!(self.currentHTTPBodyPart = [self.HTTPBodyPartEnumerator nextObject])) {
+                break;
+            }
+        } else {
+            NSUInteger maxLength = MIN(length, self.numberOfBytesInPacket) - (NSUInteger)totalNumberOfBytesRead;
+            NSInteger numberOfBytesRead = [self.currentHTTPBodyPart read:&buffer[totalNumberOfBytesRead] maxLength:maxLength];
+            if (numberOfBytesRead == -1) {
+                self.streamError = self.currentHTTPBodyPart.inputStream.streamError;
+                break;
+            } else {
+                totalNumberOfBytesRead += numberOfBytesRead;
+
+                if (self.delay > 0.0f) {
+                    [NSThread sleepForTimeInterval:self.delay];
+                }
+            }
+        }
+    }
+
+    return totalNumberOfBytesRead;
+}
+
+- (BOOL)getBuffer:(__unused uint8_t **)buffer
+           length:(__unused NSUInteger *)len
+{
+    return NO;
+}
+
+- (BOOL)hasBytesAvailable {
+    return [self streamStatus] == NSStreamStatusOpen;
+}
+
+#pragma mark - NSStream
+
+- (void)open {
+    if (self.streamStatus == NSStreamStatusOpen) {
+        return;
+    }
+
+    self.streamStatus = NSStreamStatusOpen;
+
+    [self setInitialAndFinalBoundaries];
+    self.HTTPBodyPartEnumerator = [self.HTTPBodyParts objectEnumerator];
+}
+
+- (void)close {
+    self.streamStatus = NSStreamStatusClosed;
+}
+
+- (id)propertyForKey:(__unused NSString *)key {
+    return nil;
+}
+
+- (BOOL)setProperty:(__unused id)property
+             forKey:(__unused NSString *)key
+{
+    return NO;
+}
+
+- (void)scheduleInRunLoop:(__unused NSRunLoop *)aRunLoop
+                  forMode:(__unused NSString *)mode
+{}
+
+- (void)removeFromRunLoop:(__unused NSRunLoop *)aRunLoop
+                  forMode:(__unused NSString *)mode
+{}
+
+- (unsigned long long)contentLength {
+    unsigned long long length = 0;
+    for (AFHTTPBodyPart *bodyPart in self.HTTPBodyParts) {
+        length += [bodyPart contentLength];
+    }
+
+    return length;
+}
+
+#pragma mark - Undocumented CFReadStream Bridged Methods
+
+- (void)_scheduleInCFRunLoop:(__unused CFRunLoopRef)aRunLoop
+                     forMode:(__unused CFStringRef)aMode
+{}
+
+- (void)_unscheduleFromCFRunLoop:(__unused CFRunLoopRef)aRunLoop
+                         forMode:(__unused CFStringRef)aMode
+{}
+
+- (BOOL)_setCFClientFlags:(__unused CFOptionFlags)inFlags
+                 callback:(__unused CFReadStreamClientCallBack)inCallback
+                  context:(__unused CFStreamClientContext *)inContext {
+    return NO;
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFMultipartBodyStream *bodyStreamCopy = [[[self class] allocWithZone:zone] initWithStringEncoding:self.stringEncoding];
+
+    for (AFHTTPBodyPart *bodyPart in self.HTTPBodyParts) {
+        [bodyStreamCopy appendHTTPBodyPart:[bodyPart copy]];
+    }
+
+    [bodyStreamCopy setInitialAndFinalBoundaries];
+
+    return bodyStreamCopy;
+}
+
+@end
+
+#pragma mark -
+
+typedef enum {
+    AFEncapsulationBoundaryPhase = 1,
+    AFHeaderPhase                = 2,
+    AFBodyPhase                  = 3,
+    AFFinalBoundaryPhase         = 4,
+} AFHTTPBodyPartReadPhase;
+
+@interface AFHTTPBodyPart () <NSCopying> {
+    AFHTTPBodyPartReadPhase _phase;
+    NSInputStream *_inputStream;
+    unsigned long long _phaseReadOffset;
+}
+
+- (BOOL)transitionToNextPhase;
+- (NSInteger)readData:(NSData *)data
+           intoBuffer:(uint8_t *)buffer
+            maxLength:(NSUInteger)length;
+@end
+
+@implementation AFHTTPBodyPart
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    [self transitionToNextPhase];
+
+    return self;
+}
+
+- (void)dealloc {
+    if (_inputStream) {
+        [_inputStream close];
+        _inputStream = nil;
+    }
+}
+
+- (NSInputStream *)inputStream {
+    if (!_inputStream) {
+        if ([self.body isKindOfClass:[NSData class]]) {
+            _inputStream = [NSInputStream inputStreamWithData:self.body];
+        } else if ([self.body isKindOfClass:[NSURL class]]) {
+            _inputStream = [NSInputStream inputStreamWithURL:self.body];
+        } else if ([self.body isKindOfClass:[NSInputStream class]]) {
+            _inputStream = self.body;
+        } else {
+            _inputStream = [NSInputStream inputStreamWithData:[NSData data]];
+        }
+    }
+
+    return _inputStream;
+}
+
+- (NSString *)stringForHeaders {
+    NSMutableString *headerString = [NSMutableString string];
+    for (NSString *field in [self.headers allKeys]) {
+        [headerString appendString:[NSString stringWithFormat:@"%@: %@%@", field, [self.headers valueForKey:field], kAFMultipartFormCRLF]];
+    }
+    [headerString appendString:kAFMultipartFormCRLF];
+
+    return [NSString stringWithString:headerString];
+}
+
+- (unsigned long long)contentLength {
+    unsigned long long length = 0;
+
+    NSData *encapsulationBoundaryData = [([self hasInitialBoundary] ? AFMultipartFormInitialBoundary(self.boundary) : AFMultipartFormEncapsulationBoundary(self.boundary)) dataUsingEncoding:self.stringEncoding];
+    length += [encapsulationBoundaryData length];
+
+    NSData *headersData = [[self stringForHeaders] dataUsingEncoding:self.stringEncoding];
+    length += [headersData length];
+
+    length += _bodyContentLength;
+
+    NSData *closingBoundaryData = ([self hasFinalBoundary] ? [AFMultipartFormFinalBoundary(self.boundary) dataUsingEncoding:self.stringEncoding] : [NSData data]);
+    length += [closingBoundaryData length];
+
+    return length;
+}
+
+- (BOOL)hasBytesAvailable {
+    // Allows `read:maxLength:` to be called again if `AFMultipartFormFinalBoundary` doesn't fit into the available buffer
+    if (_phase == AFFinalBoundaryPhase) {
+        return YES;
+    }
+
+    switch (self.inputStream.streamStatus) {
+        case NSStreamStatusNotOpen:
+        case NSStreamStatusOpening:
+        case NSStreamStatusOpen:
+        case NSStreamStatusReading:
+        case NSStreamStatusWriting:
+            return YES;
+        case NSStreamStatusAtEnd:
+        case NSStreamStatusClosed:
+        case NSStreamStatusError:
+        default:
+            return NO;
+    }
+}
+
+- (NSInteger)read:(uint8_t *)buffer
+        maxLength:(NSUInteger)length
+{
+    NSInteger totalNumberOfBytesRead = 0;
+
+    if (_phase == AFEncapsulationBoundaryPhase) {
+        NSData *encapsulationBoundaryData = [([self hasInitialBoundary] ? AFMultipartFormInitialBoundary(self.boundary) : AFMultipartFormEncapsulationBoundary(self.boundary)) dataUsingEncoding:self.stringEncoding];
+        totalNumberOfBytesRead += [self readData:encapsulationBoundaryData intoBuffer:&buffer[totalNumberOfBytesRead] maxLength:(length - (NSUInteger)totalNumberOfBytesRead)];
+    }
+
+    if (_phase == AFHeaderPhase) {
+        NSData *headersData = [[self stringForHeaders] dataUsingEncoding:self.stringEncoding];
+        totalNumberOfBytesRead += [self readData:headersData intoBuffer:&buffer[totalNumberOfBytesRead] maxLength:(length - (NSUInteger)totalNumberOfBytesRead)];
+    }
+
+    if (_phase == AFBodyPhase) {
+        NSInteger numberOfBytesRead = 0;
+
+        numberOfBytesRead = [self.inputStream read:&buffer[totalNumberOfBytesRead] maxLength:(length - (NSUInteger)totalNumberOfBytesRead)];
+        if (numberOfBytesRead == -1) {
+            return -1;
+        } else {
+            totalNumberOfBytesRead += numberOfBytesRead;
+
+            if ([self.inputStream streamStatus] >= NSStreamStatusAtEnd) {
+                [self transitionToNextPhase];
+            }
+        }
+    }
+
+    if (_phase == AFFinalBoundaryPhase) {
+        NSData *closingBoundaryData = ([self hasFinalBoundary] ? [AFMultipartFormFinalBoundary(self.boundary) dataUsingEncoding:self.stringEncoding] : [NSData data]);
+        totalNumberOfBytesRead += [self readData:closingBoundaryData intoBuffer:&buffer[totalNumberOfBytesRead] maxLength:(length - (NSUInteger)totalNumberOfBytesRead)];
+    }
+
+    return totalNumberOfBytesRead;
+}
+
+- (NSInteger)readData:(NSData *)data
+           intoBuffer:(uint8_t *)buffer
+            maxLength:(NSUInteger)length
+{
+    NSRange range = NSMakeRange((NSUInteger)_phaseReadOffset, MIN([data length] - ((NSUInteger)_phaseReadOffset), length));
+    [data getBytes:buffer range:range];
+
+    _phaseReadOffset += range.length;
+
+    if (((NSUInteger)_phaseReadOffset) >= [data length]) {
+        [self transitionToNextPhase];
+    }
+
+    return (NSInteger)range.length;
+}
+
+- (BOOL)transitionToNextPhase {
+    if (![[NSThread currentThread] isMainThread]) {
+        dispatch_sync(dispatch_get_main_queue(), ^{
+            [self transitionToNextPhase];
+        });
+        return YES;
+    }
+
+    switch (_phase) {
+        case AFEncapsulationBoundaryPhase:
+            _phase = AFHeaderPhase;
+            break;
+        case AFHeaderPhase:
+            [self.inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
+            [self.inputStream open];
+            _phase = AFBodyPhase;
+            break;
+        case AFBodyPhase:
+            [self.inputStream close];
+            _phase = AFFinalBoundaryPhase;
+            break;
+        case AFFinalBoundaryPhase:
+        default:
+            _phase = AFEncapsulationBoundaryPhase;
+            break;
+    }
+    _phaseReadOffset = 0;
+
+    return YES;
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFHTTPBodyPart *bodyPart = [[[self class] allocWithZone:zone] init];
+
+    bodyPart.stringEncoding = self.stringEncoding;
+    bodyPart.headers = self.headers;
+    bodyPart.bodyContentLength = self.bodyContentLength;
+    bodyPart.body = self.body;
+    bodyPart.boundary = self.boundary;
+
+    return bodyPart;
+}
+
+@end
+
+#pragma mark -
+
+@implementation AFJSONRequestSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithWritingOptions:(NSJSONWritingOptions)0];
+}
+
++ (instancetype)serializerWithWritingOptions:(NSJSONWritingOptions)writingOptions
+{
+    AFJSONRequestSerializer *serializer = [[self alloc] init];
+    serializer.writingOptions = writingOptions;
+
+    return serializer;
+}
+
+#pragma mark - AFURLRequestSerialization
+
+- (NSURLRequest *)requestBySerializingRequest:(NSURLRequest *)request
+                               withParameters:(id)parameters
+                                        error:(NSError *__autoreleasing *)error
+{
+    NSParameterAssert(request);
+
+    if ([self.HTTPMethodsEncodingParametersInURI containsObject:[[request HTTPMethod] uppercaseString]]) {
+        return [super requestBySerializingRequest:request withParameters:parameters error:error];
+    }
+
+    NSMutableURLRequest *mutableRequest = [request mutableCopy];
+
+    [self.HTTPRequestHeaders enumerateKeysAndObjectsUsingBlock:^(id field, id value, BOOL * __unused stop) {
+        if (![request valueForHTTPHeaderField:field]) {
+            [mutableRequest setValue:value forHTTPHeaderField:field];
+        }
+    }];
+
+    if (parameters) {
+        if (![mutableRequest valueForHTTPHeaderField:@"Content-Type"]) {
+            [mutableRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
+        }
+
+        if (![NSJSONSerialization isValidJSONObject:parameters]) {
+            if (error) {
+                NSDictionary *userInfo = @{NSLocalizedFailureReasonErrorKey: NSLocalizedStringFromTable(@"The `parameters` argument is not valid JSON.", @"AFNetworking", nil)};
+                *error = [[NSError alloc] initWithDomain:AFURLRequestSerializationErrorDomain code:NSURLErrorCannotDecodeContentData userInfo:userInfo];
+            }
+            return nil;
+        }
+
+        NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters options:self.writingOptions error:error];
+        
+        if (!jsonData) {
+            return nil;
+        }
+        
+        [mutableRequest setHTTPBody:jsonData];
+    }
+
+    return mutableRequest;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.writingOptions = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(writingOptions))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeInteger:self.writingOptions forKey:NSStringFromSelector(@selector(writingOptions))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFJSONRequestSerializer *serializer = [super copyWithZone:zone];
+    serializer.writingOptions = self.writingOptions;
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@implementation AFPropertyListRequestSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithFormat:NSPropertyListXMLFormat_v1_0 writeOptions:0];
+}
+
++ (instancetype)serializerWithFormat:(NSPropertyListFormat)format
+                        writeOptions:(NSPropertyListWriteOptions)writeOptions
+{
+    AFPropertyListRequestSerializer *serializer = [[self alloc] init];
+    serializer.format = format;
+    serializer.writeOptions = writeOptions;
+
+    return serializer;
+}
+
+#pragma mark - AFURLRequestSerializer
+
+- (NSURLRequest *)requestBySerializingRequest:(NSURLRequest *)request
+                               withParameters:(id)parameters
+                                        error:(NSError *__autoreleasing *)error
+{
+    NSParameterAssert(request);
+
+    if ([self.HTTPMethodsEncodingParametersInURI containsObject:[[request HTTPMethod] uppercaseString]]) {
+        return [super requestBySerializingRequest:request withParameters:parameters error:error];
+    }
+
+    NSMutableURLRequest *mutableRequest = [request mutableCopy];
+
+    [self.HTTPRequestHeaders enumerateKeysAndObjectsUsingBlock:^(id field, id value, BOOL * __unused stop) {
+        if (![request valueForHTTPHeaderField:field]) {
+            [mutableRequest setValue:value forHTTPHeaderField:field];
+        }
+    }];
+
+    if (parameters) {
+        if (![mutableRequest valueForHTTPHeaderField:@"Content-Type"]) {
+            [mutableRequest setValue:@"application/x-plist" forHTTPHeaderField:@"Content-Type"];
+        }
+
+        NSData *plistData = [NSPropertyListSerialization dataWithPropertyList:parameters format:self.format options:self.writeOptions error:error];
+        
+        if (!plistData) {
+            return nil;
+        }
+        
+        [mutableRequest setHTTPBody:plistData];
+    }
+
+    return mutableRequest;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.format = (NSPropertyListFormat)[[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(format))] unsignedIntegerValue];
+    self.writeOptions = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(writeOptions))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeInteger:self.format forKey:NSStringFromSelector(@selector(format))];
+    [coder encodeObject:@(self.writeOptions) forKey:NSStringFromSelector(@selector(writeOptions))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFPropertyListRequestSerializer *serializer = [super copyWithZone:zone];
+    serializer.format = self.format;
+    serializer.writeOptions = self.writeOptions;
+
+    return serializer;
+}
+
+@end
+// AFURLResponseSerialization.h
+// Copyright (c) 2011–2016 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/Foundation.h>
+#import <CoreGraphics/CoreGraphics.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ The `AFURLResponseSerialization` protocol is adopted by an object that decodes data into a more useful object representation, according to details in the server response. Response serializers may additionally perform validation on the incoming response and data.
+
+ For example, a JSON response serializer may check for an acceptable status code (`2XX` range) and content type (`application/json`), decoding a valid JSON response into an object.
+ */
+@protocol AFURLResponseSerialization <NSObject, NSSecureCoding, NSCopying>
+
+/**
+ The response object decoded from the data associated with a specified response.
+
+ @param response The response to be processed.
+ @param data The response data to be decoded.
+ @param error The error that occurred while attempting to decode the response data.
+
+ @return The object decoded from the specified response data.
+ */
+- (nullable id)responseObjectForResponse:(nullable NSURLResponse *)response
+                           data:(nullable NSData *)data
+                          error:(NSError * _Nullable __autoreleasing *)error NS_SWIFT_NOTHROW;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFHTTPResponseSerializer` conforms to the `AFURLRequestSerialization` & `AFURLResponseSerialization` protocols, offering a concrete base implementation of query string / URL form-encoded parameter serialization and default request headers, as well as response status code and content type validation.
+
+ Any request or response serializer dealing with HTTP is encouraged to subclass `AFHTTPResponseSerializer` in order to ensure consistent default behavior.
+ */
+@interface AFHTTPResponseSerializer : NSObject <AFURLResponseSerialization>
+
+- (instancetype)init;
+
+@property (nonatomic, assign) NSStringEncoding stringEncoding DEPRECATED_MSG_ATTRIBUTE("The string encoding is never used. AFHTTPResponseSerializer only validates status codes and content types but does not try to decode the received data in any way.");
+
+/**
+ Creates and returns a serializer with default configuration.
+ */
++ (instancetype)serializer;
+
+///-----------------------------------------
+/// @name Configuring Response Serialization
+///-----------------------------------------
+
+/**
+ The acceptable HTTP status codes for responses. When non-`nil`, responses with status codes not contained by the set will result in an error during validation.
+
+ See http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
+ */
+@property (nonatomic, copy, nullable) NSIndexSet *acceptableStatusCodes;
+
+/**
+ The acceptable MIME types for responses. When non-`nil`, responses with a `Content-Type` with MIME types that do not intersect with the set will result in an error during validation.
+ */
+@property (nonatomic, copy, nullable) NSSet <NSString *> *acceptableContentTypes;
+
+/**
+ Validates the specified response and data.
+
+ In its base implementation, this method checks for an acceptable status code and content type. Subclasses may wish to add other domain-specific checks.
+
+ @param response The response to be validated.
+ @param data The data associated with the response.
+ @param error The error that occurred while attempting to validate the response.
+
+ @return `YES` if the response is valid, otherwise `NO`.
+ */
+- (BOOL)validateResponse:(nullable NSHTTPURLResponse *)response
+                    data:(nullable NSData *)data
+                   error:(NSError * _Nullable __autoreleasing *)error;
+
+@end
+
+#pragma mark -
+
+
+/**
+ `AFJSONResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes JSON responses.
+
+ By default, `AFJSONResponseSerializer` accepts the following MIME types, which includes the official standard, `application/json`, as well as other commonly-used types:
+
+ - `application/json`
+ - `text/json`
+ - `text/javascript`
+
+ In RFC 7159 - Section 8.1, it states that JSON text is required to be encoded in UTF-8, UTF-16, or UTF-32, and the default encoding is UTF-8. NSJSONSerialization provides support for all the encodings listed in the specification, and recommends UTF-8 for efficiency. Using an unsupported encoding will result in serialization error. See the `NSJSONSerialization` documentation for more details.
+ */
+@interface AFJSONResponseSerializer : AFHTTPResponseSerializer
+
+- (instancetype)init;
+
+/**
+ Options for reading the response JSON data and creating the Foundation objects. For possible values, see the `NSJSONSerialization` documentation section "NSJSONReadingOptions". `0` by default.
+ */
+@property (nonatomic, assign) NSJSONReadingOptions readingOptions;
+
+/**
+ Whether to remove keys with `NSNull` values from response JSON. Defaults to `NO`.
+ */
+@property (nonatomic, assign) BOOL removesKeysWithNullValues;
+
+/**
+ Creates and returns a JSON serializer with specified reading and writing options.
+
+ @param readingOptions The specified JSON reading options.
+ */
++ (instancetype)serializerWithReadingOptions:(NSJSONReadingOptions)readingOptions;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFXMLParserResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes XML responses as an `NSXMLParser` objects.
+
+ By default, `AFXMLParserResponseSerializer` accepts the following MIME types, which includes the official standard, `application/xml`, as well as other commonly-used types:
+
+ - `application/xml`
+ - `text/xml`
+ */
+@interface AFXMLParserResponseSerializer : AFHTTPResponseSerializer
+
+@end
+
+#pragma mark -
+
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
+
+/**
+ `AFXMLDocumentResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes XML responses as an `NSXMLDocument` objects.
+
+ By default, `AFXMLDocumentResponseSerializer` accepts the following MIME types, which includes the official standard, `application/xml`, as well as other commonly-used types:
+
+ - `application/xml`
+ - `text/xml`
+ */
+@interface AFXMLDocumentResponseSerializer : AFHTTPResponseSerializer
+
+- (instancetype)init;
+
+/**
+ Input and output options specifically intended for `NSXMLDocument` objects. For possible values, see the `NSXMLDocument` documentation section "Input and Output Options". `0` by default.
+ */
+@property (nonatomic, assign) NSUInteger options;
+
+/**
+ Creates and returns an XML document serializer with the specified options.
+
+ @param mask The XML document options.
+ */
++ (instancetype)serializerWithXMLDocumentOptions:(NSUInteger)mask;
+
+@end
+
+#endif
+
+#pragma mark -
+
+/**
+ `AFPropertyListResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes XML responses as an `NSXMLDocument` objects.
+
+ By default, `AFPropertyListResponseSerializer` accepts the following MIME types:
+
+ - `application/x-plist`
+ */
+@interface AFPropertyListResponseSerializer : AFHTTPResponseSerializer
+
+- (instancetype)init;
+
+/**
+ The property list format. Possible values are described in "NSPropertyListFormat".
+ */
+@property (nonatomic, assign) NSPropertyListFormat format;
+
+/**
+ The property list reading options. Possible values are described in "NSPropertyListMutabilityOptions."
+ */
+@property (nonatomic, assign) NSPropertyListReadOptions readOptions;
+
+/**
+ Creates and returns a property list serializer with a specified format, read options, and write options.
+
+ @param format The property list format.
+ @param readOptions The property list reading options.
+ */
++ (instancetype)serializerWithFormat:(NSPropertyListFormat)format
+                         readOptions:(NSPropertyListReadOptions)readOptions;
+
+@end
+
+#pragma mark -
+
+/**
+ `AFImageResponseSerializer` is a subclass of `AFHTTPResponseSerializer` that validates and decodes image responses.
+
+ By default, `AFImageResponseSerializer` accepts the following MIME types, which correspond to the image formats supported by UIImage or NSImage:
+
+ - `image/tiff`
+ - `image/jpeg`
+ - `image/gif`
+ - `image/png`
+ - `image/ico`
+ - `image/x-icon`
+ - `image/bmp`
+ - `image/x-bmp`
+ - `image/x-xbitmap`
+ - `image/x-win-bitmap`
+ */
+@interface AFImageResponseSerializer : AFHTTPResponseSerializer
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+/**
+ The scale factor used when interpreting the image data to construct `responseImage`. Specifying a scale factor of 1.0 results in an image whose size matches the pixel-based dimensions of the image. Applying a different scale factor changes the size of the image as reported by the size property. This is set to the value of scale of the main screen by default, which automatically scales images for retina displays, for instance.
+ */
+@property (nonatomic, assign) CGFloat imageScale;
+
+/**
+ Whether to automatically inflate response image data for compressed formats (such as PNG or JPEG). Enabling this can significantly improve drawing performance on iOS when used with `setCompletionBlockWithSuccess:failure:`, as it allows a bitmap representation to be constructed in the background rather than on the main thread. `YES` by default.
+ */
+@property (nonatomic, assign) BOOL automaticallyInflatesResponseImage;
+#endif
+
+@end
+
+#pragma mark -
+
+/**
+ `AFCompoundSerializer` is a subclass of `AFHTTPResponseSerializer` that delegates the response serialization to the first `AFHTTPResponseSerializer` object that returns an object for `responseObjectForResponse:data:error:`, falling back on the default behavior of `AFHTTPResponseSerializer`. This is useful for supporting multiple potential types and structures of server responses with a single serializer.
+ */
+@interface AFCompoundResponseSerializer : AFHTTPResponseSerializer
+
+/**
+ The component response serializers.
+ */
+@property (readonly, nonatomic, copy) NSArray <id<AFURLResponseSerialization>> *responseSerializers;
+
+/**
+ Creates and returns a compound serializer comprised of the specified response serializers.
+
+ @warning Each response serializer specified must be a subclass of `AFHTTPResponseSerializer`, and response to `-validateResponse:data:error:`.
+ */
++ (instancetype)compoundSerializerWithResponseSerializers:(NSArray <id<AFURLResponseSerialization>> *)responseSerializers;
+
+@end
+
+///----------------
+/// @name Constants
+///----------------
+
+/**
+ ## Error Domains
+
+ The following error domain is predefined.
+
+ - `NSString * const AFURLResponseSerializationErrorDomain`
+
+ ### Constants
+
+ `AFURLResponseSerializationErrorDomain`
+ AFURLResponseSerializer errors. Error codes for `AFURLResponseSerializationErrorDomain` correspond to codes in `NSURLErrorDomain`.
+ */
+FOUNDATION_EXPORT NSString * const AFURLResponseSerializationErrorDomain;
+
+/**
+ ## User info dictionary keys
+
+ These keys may exist in the user info dictionary, in addition to those defined for NSError.
+
+ - `NSString * const AFNetworkingOperationFailingURLResponseErrorKey`
+ - `NSString * const AFNetworkingOperationFailingURLResponseDataErrorKey`
+
+ ### Constants
+
+ `AFNetworkingOperationFailingURLResponseErrorKey`
+ The corresponding value is an `NSURLResponse` containing the response of the operation associated with an error. This key is only present in the `AFURLResponseSerializationErrorDomain`.
+
+ `AFNetworkingOperationFailingURLResponseDataErrorKey`
+ The corresponding value is an `NSData` containing the original data of the operation associated with an error. This key is only present in the `AFURLResponseSerializationErrorDomain`.
+ */
+FOUNDATION_EXPORT NSString * const AFNetworkingOperationFailingURLResponseErrorKey;
+
+FOUNDATION_EXPORT NSString * const AFNetworkingOperationFailingURLResponseDataErrorKey;
+
+NS_ASSUME_NONNULL_END
+// AFURLResponseSerialization.m
+// Copyright (c) 2011–2016 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 "AFURLResponseSerialization.h"
+
+#import <TargetConditionals.h>
+
+#if TARGET_OS_IOS
+#import <UIKit/UIKit.h>
+#elif TARGET_OS_WATCH
+#import <WatchKit/WatchKit.h>
+#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
+#import <Cocoa/Cocoa.h>
+#endif
+
+NSString * const AFURLResponseSerializationErrorDomain = @"com.alamofire.error.serialization.response";
+NSString * const AFNetworkingOperationFailingURLResponseErrorKey = @"com.alamofire.serialization.response.error.response";
+NSString * const AFNetworkingOperationFailingURLResponseDataErrorKey = @"com.alamofire.serialization.response.error.data";
+
+static NSError * AFErrorWithUnderlyingError(NSError *error, NSError *underlyingError) {
+    if (!error) {
+        return underlyingError;
+    }
+
+    if (!underlyingError || error.userInfo[NSUnderlyingErrorKey]) {
+        return error;
+    }
+
+    NSMutableDictionary *mutableUserInfo = [error.userInfo mutableCopy];
+    mutableUserInfo[NSUnderlyingErrorKey] = underlyingError;
+
+    return [[NSError alloc] initWithDomain:error.domain code:error.code userInfo:mutableUserInfo];
+}
+
+static BOOL AFErrorOrUnderlyingErrorHasCodeInDomain(NSError *error, NSInteger code, NSString *domain) {
+    if ([error.domain isEqualToString:domain] && error.code == code) {
+        return YES;
+    } else if (error.userInfo[NSUnderlyingErrorKey]) {
+        return AFErrorOrUnderlyingErrorHasCodeInDomain(error.userInfo[NSUnderlyingErrorKey], code, domain);
+    }
+
+    return NO;
+}
+
+static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingOptions readingOptions) {
+    if ([JSONObject isKindOfClass:[NSArray class]]) {
+        NSMutableArray *mutableArray = [NSMutableArray arrayWithCapacity:[(NSArray *)JSONObject count]];
+        for (id value in (NSArray *)JSONObject) {
+            [mutableArray addObject:AFJSONObjectByRemovingKeysWithNullValues(value, readingOptions)];
+        }
+
+        return (readingOptions & NSJSONReadingMutableContainers) ? mutableArray : [NSArray arrayWithArray:mutableArray];
+    } else if ([JSONObject isKindOfClass:[NSDictionary class]]) {
+        NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithDictionary:JSONObject];
+        for (id <NSCopying> key in [(NSDictionary *)JSONObject allKeys]) {
+            id value = (NSDictionary *)JSONObject[key];
+            if (!value || [value isEqual:[NSNull null]]) {
+                [mutableDictionary removeObjectForKey:key];
+            } else if ([value isKindOfClass:[NSArray class]] || [value isKindOfClass:[NSDictionary class]]) {
+                mutableDictionary[key] = AFJSONObjectByRemovingKeysWithNullValues(value, readingOptions);
+            }
+        }
+
+        return (readingOptions & NSJSONReadingMutableContainers) ? mutableDictionary : [NSDictionary dictionaryWithDictionary:mutableDictionary];
+    }
+
+    return JSONObject;
+}
+
+@implementation AFHTTPResponseSerializer
+
++ (instancetype)serializer {
+    return [[self alloc] init];
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableStatusCodes = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(200, 100)];
+    self.acceptableContentTypes = nil;
+
+    return self;
+}
+
+#pragma mark -
+
+- (BOOL)validateResponse:(NSHTTPURLResponse *)response
+                    data:(NSData *)data
+                   error:(NSError * __autoreleasing *)error
+{
+    BOOL responseIsValid = YES;
+    NSError *validationError = nil;
+
+    if (response && [response isKindOfClass:[NSHTTPURLResponse class]]) {
+        if (self.acceptableContentTypes && ![self.acceptableContentTypes containsObject:[response MIMEType]] &&
+            !([response MIMEType] == nil && [data length] == 0)) {
+
+            if ([data length] > 0 && [response URL]) {
+                NSMutableDictionary *mutableUserInfo = [@{
+                                                          NSLocalizedDescriptionKey: [NSString stringWithFormat:NSLocalizedStringFromTable(@"Request failed: unacceptable content-type: %@", @"AFNetworking", nil), [response MIMEType]],
+                                                          NSURLErrorFailingURLErrorKey:[response URL],
+                                                          AFNetworkingOperationFailingURLResponseErrorKey: response,
+                                                        } mutableCopy];
+                if (data) {
+                    mutableUserInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] = data;
+                }
+
+                validationError = AFErrorWithUnderlyingError([NSError errorWithDomain:AFURLResponseSerializationErrorDomain code:NSURLErrorCannotDecodeContentData userInfo:mutableUserInfo], validationError);
+            }
+
+            responseIsValid = NO;
+        }
+
+        if (self.acceptableStatusCodes && ![self.acceptableStatusCodes containsIndex:(NSUInteger)response.statusCode] && [response URL]) {
+            NSMutableDictionary *mutableUserInfo = [@{
+                                               NSLocalizedDescriptionKey: [NSString stringWithFormat:NSLocalizedStringFromTable(@"Request failed: %@ (%ld)", @"AFNetworking", nil), [NSHTTPURLResponse localizedStringForStatusCode:response.statusCode], (long)response.statusCode],
+                                               NSURLErrorFailingURLErrorKey:[response URL],
+                                               AFNetworkingOperationFailingURLResponseErrorKey: response,
+                                       } mutableCopy];
+
+            if (data) {
+                mutableUserInfo[AFNetworkingOperationFailingURLResponseDataErrorKey] = data;
+            }
+
+            validationError = AFErrorWithUnderlyingError([NSError errorWithDomain:AFURLResponseSerializationErrorDomain code:NSURLErrorBadServerResponse userInfo:mutableUserInfo], validationError);
+
+            responseIsValid = NO;
+        }
+    }
+
+    if (error && !responseIsValid) {
+        *error = validationError;
+    }
+
+    return responseIsValid;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    [self validateResponse:(NSHTTPURLResponse *)response data:data error:error];
+
+    return data;
+}
+
+#pragma mark - NSSecureCoding
+
++ (BOOL)supportsSecureCoding {
+    return YES;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [self init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableStatusCodes = [decoder decodeObjectOfClass:[NSIndexSet class] forKey:NSStringFromSelector(@selector(acceptableStatusCodes))];
+    self.acceptableContentTypes = [decoder decodeObjectOfClass:[NSIndexSet class] forKey:NSStringFromSelector(@selector(acceptableContentTypes))];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [coder encodeObject:self.acceptableStatusCodes forKey:NSStringFromSelector(@selector(acceptableStatusCodes))];
+    [coder encodeObject:self.acceptableContentTypes forKey:NSStringFromSelector(@selector(acceptableContentTypes))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFHTTPResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
+    serializer.acceptableStatusCodes = [self.acceptableStatusCodes copyWithZone:zone];
+    serializer.acceptableContentTypes = [self.acceptableContentTypes copyWithZone:zone];
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@implementation AFJSONResponseSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithReadingOptions:(NSJSONReadingOptions)0];
+}
+
++ (instancetype)serializerWithReadingOptions:(NSJSONReadingOptions)readingOptions {
+    AFJSONResponseSerializer *serializer = [[self alloc] init];
+    serializer.readingOptions = readingOptions;
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    // Workaround for behavior of Rails to return a single space for `head :ok` (a workaround for a bug in Safari), which is not interpreted as valid input by NSJSONSerialization.
+    // See https://github.com/rails/rails/issues/1742
+    BOOL isSpace = [data isEqualToData:[NSData dataWithBytes:" " length:1]];
+    
+    if (data.length == 0 || isSpace) {
+        return nil;
+    }
+    
+    NSError *serializationError = nil;
+    
+    id responseObject = [NSJSONSerialization JSONObjectWithData:data options:self.readingOptions error:&serializationError];
+
+    if (!responseObject)
+    {
+        if (error) {
+            *error = AFErrorWithUnderlyingError(serializationError, *error);
+        }
+        return nil;
+    }
+    
+    if (self.removesKeysWithNullValues) {
+        return AFJSONObjectByRemovingKeysWithNullValues(responseObject, self.readingOptions);
+    }
+
+    return responseObject;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.readingOptions = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(readingOptions))] unsignedIntegerValue];
+    self.removesKeysWithNullValues = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(removesKeysWithNullValues))] boolValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:@(self.readingOptions) forKey:NSStringFromSelector(@selector(readingOptions))];
+    [coder encodeObject:@(self.removesKeysWithNullValues) forKey:NSStringFromSelector(@selector(removesKeysWithNullValues))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFJSONResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.readingOptions = self.readingOptions;
+    serializer.removesKeysWithNullValues = self.removesKeysWithNullValues;
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@implementation AFXMLParserResponseSerializer
+
++ (instancetype)serializer {
+    AFXMLParserResponseSerializer *serializer = [[self alloc] init];
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/xml", @"text/xml", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSHTTPURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    return [[NSXMLParser alloc] initWithData:data];
+}
+
+@end
+
+#pragma mark -
+
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
+
+@implementation AFXMLDocumentResponseSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithXMLDocumentOptions:0];
+}
+
++ (instancetype)serializerWithXMLDocumentOptions:(NSUInteger)mask {
+    AFXMLDocumentResponseSerializer *serializer = [[self alloc] init];
+    serializer.options = mask;
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/xml", @"text/xml", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    NSError *serializationError = nil;
+    NSXMLDocument *document = [[NSXMLDocument alloc] initWithData:data options:self.options error:&serializationError];
+
+    if (!document)
+    {
+        if (error) {
+            *error = AFErrorWithUnderlyingError(serializationError, *error);
+        }
+        return nil;
+    }
+    
+    return document;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.options = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(options))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:@(self.options) forKey:NSStringFromSelector(@selector(options))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFXMLDocumentResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.options = self.options;
+
+    return serializer;
+}
+
+@end
+
+#endif
+
+#pragma mark -
+
+@implementation AFPropertyListResponseSerializer
+
++ (instancetype)serializer {
+    return [self serializerWithFormat:NSPropertyListXMLFormat_v1_0 readOptions:0];
+}
+
++ (instancetype)serializerWithFormat:(NSPropertyListFormat)format
+                         readOptions:(NSPropertyListReadOptions)readOptions
+{
+    AFPropertyListResponseSerializer *serializer = [[self alloc] init];
+    serializer.format = format;
+    serializer.readOptions = readOptions;
+
+    return serializer;
+}
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"application/x-plist", nil];
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+    if (!data) {
+        return nil;
+    }
+    
+    NSError *serializationError = nil;
+    
+    id responseObject = [NSPropertyListSerialization propertyListWithData:data options:self.readOptions format:NULL error:&serializationError];
+    
+    if (!responseObject)
+    {
+        if (error) {
+            *error = AFErrorWithUnderlyingError(serializationError, *error);
+        }
+        return nil;
+    }
+
+    return responseObject;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.format = (NSPropertyListFormat)[[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(format))] unsignedIntegerValue];
+    self.readOptions = [[decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(readOptions))] unsignedIntegerValue];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:@(self.format) forKey:NSStringFromSelector(@selector(format))];
+    [coder encodeObject:@(self.readOptions) forKey:NSStringFromSelector(@selector(readOptions))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFPropertyListResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.format = self.format;
+    serializer.readOptions = self.readOptions;
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+#import <CoreGraphics/CoreGraphics.h>
+#import <UIKit/UIKit.h>
+
+@interface UIImage (AFNetworkingSafeImageLoading)
++ (UIImage *)af_safeImageWithData:(NSData *)data;
+@end
+
+static NSLock* imageLock = nil;
+
+@implementation UIImage (AFNetworkingSafeImageLoading)
+
++ (UIImage *)af_safeImageWithData:(NSData *)data {
+    UIImage* image = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        imageLock = [[NSLock alloc] init];
+    });
+    
+    [imageLock lock];
+    image = [UIImage imageWithData:data];
+    [imageLock unlock];
+    return image;
+}
+
+@end
+
+static UIImage * AFImageWithDataAtScale(NSData *data, CGFloat scale) {
+    UIImage *image = [UIImage af_safeImageWithData:data];
+    if (image.images) {
+        return image;
+    }
+    
+    return [[UIImage alloc] initWithCGImage:[image CGImage] scale:scale orientation:image.imageOrientation];
+}
+
+static UIImage * AFInflatedImageFromResponseWithDataAtScale(NSHTTPURLResponse *response, NSData *data, CGFloat scale) {
+    if (!data || [data length] == 0) {
+        return nil;
+    }
+
+    CGImageRef imageRef = NULL;
+    CGDataProviderRef dataProvider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
+
+    if ([response.MIMEType isEqualToString:@"image/png"]) {
+        imageRef = CGImageCreateWithPNGDataProvider(dataProvider,  NULL, true, kCGRenderingIntentDefault);
+    } else if ([response.MIMEType isEqualToString:@"image/jpeg"]) {
+        imageRef = CGImageCreateWithJPEGDataProvider(dataProvider, NULL, true, kCGRenderingIntentDefault);
+
+        if (imageRef) {
+            CGColorSpaceRef imageColorSpace = CGImageGetColorSpace(imageRef);
+            CGColorSpaceModel imageColorSpaceModel = CGColorSpaceGetModel(imageColorSpace);
+
+            // CGImageCreateWithJPEGDataProvider does not properly handle CMKY, so fall back to AFImageWithDataAtScale
+            if (imageColorSpaceModel == kCGColorSpaceModelCMYK) {
+                CGImageRelease(imageRef);
+                imageRef = NULL;
+            }
+        }
+    }
+
+    CGDataProviderRelease(dataProvider);
+
+    UIImage *image = AFImageWithDataAtScale(data, scale);
+    if (!imageRef) {
+        if (image.images || !image) {
+            return image;
+        }
+
+        imageRef = CGImageCreateCopy([image CGImage]);
+        if (!imageRef) {
+            return nil;
+        }
+    }
+
+    size_t width = CGImageGetWidth(imageRef);
+    size_t height = CGImageGetHeight(imageRef);
+    size_t bitsPerComponent = CGImageGetBitsPerComponent(imageRef);
+
+    if (width * height > 1024 * 1024 || bitsPerComponent > 8) {
+        CGImageRelease(imageRef);
+
+        return image;
+    }
+
+    // CGImageGetBytesPerRow() calculates incorrectly in iOS 5.0, so defer to CGBitmapContextCreate
+    size_t bytesPerRow = 0;
+    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+    CGColorSpaceModel colorSpaceModel = CGColorSpaceGetModel(colorSpace);
+    CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef);
+
+    if (colorSpaceModel == kCGColorSpaceModelRGB) {
+        uint32_t alpha = (bitmapInfo & kCGBitmapAlphaInfoMask);
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wassign-enum"
+        if (alpha == kCGImageAlphaNone) {
+            bitmapInfo &= ~kCGBitmapAlphaInfoMask;
+            bitmapInfo |= kCGImageAlphaNoneSkipFirst;
+        } else if (!(alpha == kCGImageAlphaNoneSkipFirst || alpha == kCGImageAlphaNoneSkipLast)) {
+            bitmapInfo &= ~kCGBitmapAlphaInfoMask;
+            bitmapInfo |= kCGImageAlphaPremultipliedFirst;
+        }
+#pragma clang diagnostic pop
+    }
+
+    CGContextRef context = CGBitmapContextCreate(NULL, width, height, bitsPerComponent, bytesPerRow, colorSpace, bitmapInfo);
+
+    CGColorSpaceRelease(colorSpace);
+
+    if (!context) {
+        CGImageRelease(imageRef);
+
+        return image;
+    }
+
+    CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, width, height), imageRef);
+    CGImageRef inflatedImageRef = CGBitmapContextCreateImage(context);
+
+    CGContextRelease(context);
+
+    UIImage *inflatedImage = [[UIImage alloc] initWithCGImage:inflatedImageRef scale:scale orientation:image.imageOrientation];
+
+    CGImageRelease(inflatedImageRef);
+    CGImageRelease(imageRef);
+
+    return inflatedImage;
+}
+#endif
+
+
+@implementation AFImageResponseSerializer
+
+- (instancetype)init {
+    self = [super init];
+    if (!self) {
+        return nil;
+    }
+
+    self.acceptableContentTypes = [[NSSet alloc] initWithObjects:@"image/tiff", @"image/jpeg", @"image/gif", @"image/png", @"image/ico", @"image/x-icon", @"image/bmp", @"image/x-bmp", @"image/x-xbitmap", @"image/x-win-bitmap", nil];
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+    self.imageScale = [[UIScreen mainScreen] scale];
+    self.automaticallyInflatesResponseImage = YES;
+#elif TARGET_OS_WATCH
+    self.imageScale = [[WKInterfaceDevice currentDevice] screenScale];
+    self.automaticallyInflatesResponseImage = YES;
+#endif
+
+    return self;
+}
+
+#pragma mark - AFURLResponseSerializer
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
+        if (!error || AFErrorOrUnderlyingErrorHasCodeInDomain(*error, NSURLErrorCannotDecodeContentData, AFURLResponseSerializationErrorDomain)) {
+            return nil;
+        }
+    }
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+    if (self.automaticallyInflatesResponseImage) {
+        return AFInflatedImageFromResponseWithDataAtScale((NSHTTPURLResponse *)response, data, self.imageScale);
+    } else {
+        return AFImageWithDataAtScale(data, self.imageScale);
+    }
+#else
+    // Ensure that the image is set to it's correct pixel width and height
+    NSBitmapImageRep *bitimage = [[NSBitmapImageRep alloc] initWithData:data];
+    NSImage *image = [[NSImage alloc] initWithSize:NSMakeSize([bitimage pixelsWide], [bitimage pixelsHigh])];
+    [image addRepresentation:bitimage];
+
+    return image;
+#endif
+
+    return nil;
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+#if TARGET_OS_IOS  || TARGET_OS_TV || TARGET_OS_WATCH
+    NSNumber *imageScale = [decoder decodeObjectOfClass:[NSNumber class] forKey:NSStringFromSelector(@selector(imageScale))];
+#if CGFLOAT_IS_DOUBLE
+    self.imageScale = [imageScale doubleValue];
+#else
+    self.imageScale = [imageScale floatValue];
+#endif
+
+    self.automaticallyInflatesResponseImage = [decoder decodeBoolForKey:NSStringFromSelector(@selector(automaticallyInflatesResponseImage))];
+#endif
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+    [coder encodeObject:@(self.imageScale) forKey:NSStringFromSelector(@selector(imageScale))];
+    [coder encodeBool:self.automaticallyInflatesResponseImage forKey:NSStringFromSelector(@selector(automaticallyInflatesResponseImage))];
+#endif
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFImageResponseSerializer *serializer = [super copyWithZone:zone];
+
+#if TARGET_OS_IOS || TARGET_OS_TV || TARGET_OS_WATCH
+    serializer.imageScale = self.imageScale;
+    serializer.automaticallyInflatesResponseImage = self.automaticallyInflatesResponseImage;
+#endif
+
+    return serializer;
+}
+
+@end
+
+#pragma mark -
+
+@interface AFCompoundResponseSerializer ()
+@property (readwrite, nonatomic, copy) NSArray *responseSerializers;
+@end
+
+@implementation AFCompoundResponseSerializer
+
++ (instancetype)compoundSerializerWithResponseSerializers:(NSArray *)responseSerializers {
+    AFCompoundResponseSerializer *serializer = [[self alloc] init];
+    serializer.responseSerializers = responseSerializers;
+
+    return serializer;
+}
+
+#pragma mark - AFURLResponseSerialization
+
+- (id)responseObjectForResponse:(NSURLResponse *)response
+                           data:(NSData *)data
+                          error:(NSError *__autoreleasing *)error
+{
+    for (id <AFURLResponseSerialization> serializer in self.responseSerializers) {
+        if (![serializer isKindOfClass:[AFHTTPResponseSerializer class]]) {
+            continue;
+        }
+
+        NSError *serializerError = nil;
+        id responseObject = [serializer responseObjectForResponse:response data:data error:&serializerError];
+        if (responseObject) {
+            if (error) {
+                *error = AFErrorWithUnderlyingError(serializerError, *error);
+            }
+
+            return responseObject;
+        }
+    }
+
+    return [super responseObjectForResponse:response data:data error:error];
+}
+
+#pragma mark - NSSecureCoding
+
+- (instancetype)initWithCoder:(NSCoder *)decoder {
+    self = [super initWithCoder:decoder];
+    if (!self) {
+        return nil;
+    }
+
+    self.responseSerializers = [decoder decodeObjectOfClass:[NSArray class] forKey:NSStringFromSelector(@selector(responseSerializers))];
+
+    return self;
+}
+
+- (void)encodeWithCoder:(NSCoder *)coder {
+    [super encodeWithCoder:coder];
+
+    [coder encodeObject:self.responseSerializers forKey:NSStringFromSelector(@selector(responseSerializers))];
+}
+
+#pragma mark - NSCopying
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+    AFCompoundResponseSerializer *serializer = [super copyWithZone:zone];
+    serializer.responseSerializers = self.responseSerializers;
+
+    return serializer;
+}
+
+@end