1英文文档：http://cocoadocs.org/docsets/AFNetworking/3.1.0/index.html
2AFHTTPRequestSerializer
- 2.1配置HTTP请求标题
- 2.2此外AFHTTPRequestSerializer中含有多种请求方法：
3AFJSONRequestSerializer
4AFHTTPResponseSerializer
- 4.1配置响应序列化
5AFJSONResponseSerializer
6AFHTTPSessionManager
- - 6.1.1 属性
  - 6.1.2 初始化
  - 6.1.3 制作HTTP请求
- 6.2 使用获取text/html内容：
- 6.3使用获取text/json内容：
- 6.4 请求安全策略：
- 6.5文件下载：
- 6.6文件上传：
- 6.7文件上传加进度
- 6.8网络状态检测
- 6.9请求字段赋值：

英文文档：http://cocoadocs.org/docsets/AFNetworking/3.1.0/index.html

AFHTTPRequestSerializer

AFHTTPRequestSerializer符合AFURLRequestSerialization＆AFURLResponseSerialization协议，提供查询字符串/ URL形式编码的参数序列化和默认请求标头，以及响应状态码和内容类型验证的具体基本实现。鼓励处理HTTP的任何请求或响应序列化程序进行子类化AFHTTPRequestSerializer，以确保一致的默认行为。

AFHTTPRequestSerializer是用于构建NSURLRequest的类，通过-init:方法进行初始化，指定编码方式为NSUTF-8。包含对HTTP请求分为请求头和请求体的设置。

配置HTTP请求标题

HTTPRequestHeaders
+ serializer
– setValue:forHTTPHeaderField:
– valueForHTTPHeaderField:
– setAuthorizationHeaderFieldWithUsername:password:
– clearAuthorizationHeader

此外AFHTTPRequestSerializer中含有多种请求方法：

- (NSMutableURLRequest *)requestWithMethod:(NSString *)method URLString:(NSString *)URLStringparameters:(nullable id)parameters error:(NSError *_Nullable __autoreleasing *)error

AFJSONRequestSerializer

AFJSONRequestSerializer是的一个子类AFHTTPRequestSerializer，使用编码参数作为JSON NSJSONSerialization，设置Content-Type所述编码请求的application/json。

+ (instancetype)serializerWithWritingOptions:(NSJSONWritingOptions)writingOptions

AFHTTPResponseSerializer

AFHTTPResponseSerializer符合AFURLRequestSerialization＆AFURLResponseSerialization协议，提供查询字符串/ URL形式编码的参数序列化和默认请求标头，以及响应状态码和内容类型验证的具体基本实现。鼓励处理HTTP的任何请求或响应序列化程序进行子类化AFHTTPResponseSerializer，以确保一致的默认行为。

配置响应序列化

acceptableStatusCodes 属性
acceptableContentTypes 属性
– validateResponse:data:error:
stringEncoding 属性
+ serializer

对于内容格式及内容编码可以在这里修改

AFJSONResponseSerializer

AFJSONResponseSerializer是AFHTTPResponseSerializer验证和解码JSON响应的子类。

默认情况下，AFJSONResponseSerializer接受以下MIME类型（包括官方标准）application/json以及其他常用类型：

application/json
text/json
text/javascript

+ (instancetype)serializerWithReadingOptions:(NSJSONReadingOptions)readingOptions

AFHTTPSessionManager

封装了AFHTTPRequestSerializer与AFHTTPResponseSerializer 将一切请求网络的操作更加简单化。

属性

baseURL 属性
requestSerializer 属性
responseSerializer 属性

初始化

+ manager
– initWithBaseURL:
– initWithBaseURL:sessionConfiguration:

制作HTTP请求

– GET:parameters:success:failure:
– GET:parameters:progress:success:failure:
– HEAD:parameters:success:failure:
– POST:parameters:success:failure:
– POST:parameters:progress:success:failure:
– POST:parameters:constructingBodyWithBlock:success:failure:
– POST:parameters:constructingBodyWithBlock:progress:success:failure:
– PUT:parameters:success:failure:
– PATCH:parameters:success:failure:
– DELETE:parameters:success:failure:

使用获取text/html内容：

AFNetworking会默认的将返回认为是json的结果去解析，然后没有办法解析成功，所以就会报错误。

fails Error Domain=NSCocoaErrorDomain Code=3840 “JSON text did not start with array or object and option to allow fragments not set.” UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

看源码：

- (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]; //请求默认以http格式

  self.responseSerializer = [AFJSONResponseSerializer serializer];//响应默认以json格式

  return self;

}

下面是解决的方法：

#pragma mark - 获取 text\html格式数据

- (void)AFNet2

{

  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

manager.responseSerializer = [AFHTTPResponseSerializer serializer];//序列化操作

manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@”text/html”];

[manager GET:@”http://www.baidu.com” parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

NSLog(@”%@”,responseObject);//二进制数据

  NSString *result = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];//转utf-8

NSLog(@”%@”,result);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

NSLog(@”%@”,error);

}];

}

使用获取text/json内容：

- (void)AFNJson

{



  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

[manager GET:@”http://xxx.json” parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

  NSLog(@”%@”,responseObject);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

  NSLog(@”%@”,error);

}];



}

请求安全策略：

- (void)AFNHttps{



  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

  AFSecurityPolicy *securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone];

securityPolicy.allowInvalidCertificates = YES;

manager.securityPolicy = securityPolicy;

[manager GET:@”http://xxx.json” parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

  NSLog(@”%@”,responseObject);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

  NSLog(@”%@”,error);

}];

}

文件下载：

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
    NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
    return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
    NSLog(@"File downloaded to: %@", filePath);
}];
[downloadTask resume];

文件上传：

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else {
        NSLog(@"Success: %@ %@", response, responseObject);
    }
}];
[uploadTask resume];

文件上传加进度

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id formData) {
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
    } error:nil];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
              uploadTaskWithStreamedRequest:request
              progress:^(NSProgress * _Nonnull uploadProgress) {
                  // This is not called back on the main queue.
                  // You are responsible for dispatching to the main queue for UI updates
                  dispatch_async(dispatch_get_main_queue(), ^{
                      //Update the progress view
                      [progressView setProgress:uploadProgress.fractionCompleted];
                  });
              }
              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
                  if (error) {
                      NSLog(@"Error: %@", error);
                  } else {
                      NSLog(@"%@ %@", response, responseObject);
                  }
              }];

[uploadTask resume];

网络状态检测

- (void)AFNetWorkState

{

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

NSLog(@”Reachability: %@”, AFStringFromNetworkReachabilityStatus(status));

}];

[[AFNetworkReachabilityManager sharedManager] startMonitoring];

}

请求字段赋值：

NSString *URLString = @”http://example.com”;

NSDictionary *parameters = @{@"foo": @"bar", @"baz": @[@1, @2, @3]};

[[AFHTTPRequestSerializer serializer] requestWithMethod:@"GET" URLString:URLString parameters:parameters error:nil];

GET http://example.com?foo=bar&baz[]=1&baz[]=2&baz[]=3

[[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];

POST http://example.com/
Content-Type: application/x-www-form-urlencoded

foo=bar&baz[]=1&baz[]=2&baz[]=3

[[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];

POST http://example.com/
Content-Type: application/json

{"foo": "bar", "baz": [1,2,3]}

AFNetWorking 网络请求框架学习