如何使用 AFNetworking 2 设置 HTTP 请求？

Question

我需要发送普通的 HTTP 请求 (GET) 并以 text/html 形式回答。 如何使用 AFNetworkin 2 发送此响应？

现在我正在尝试使用

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://example.com"]];
[self HTTPRequestOperationWithRequest:request
                              success:^(AFHTTPRequestOperation *operation, id responseObject) {
                                  NSLog(@"JSON: %@", responseObject);
                              } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                  NSLog(@"Error: %@", error);
                              }];

而且很沮丧——它什么也没做。调试时，也没有触发success or fail子句。

我也尝试使用 GET:parameters:success:failure: 方法，但作为响应我看到了这个错误：

错误：错误域=AFNetworkingErrorDomain 代码=-1016 "请求 失败：不可接受的内容类型：text/html"

拜托，任何人都可以解释我有什么问题以及发送请求的正确方法是什么（如果我会得到文本/html的响应）？

问候，亚历克斯。

Answer 1

您在评论中说，响应使用AFHTTPRequestOperationManager的建议：

当我使用 GET 时，我收到了上面写的这个错误：Error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Request failed: unacceptable content-type: text/html"

您可以使用AFHTTPResponseSerializer 来解决这个问题：

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager GET:@"https://example.com" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    // do whatever you'd like here; for example, if you want to convert 
    // it to a string and log it, you might do something like:

    NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
    NSLog(@"%@", string);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];

你也可以使用AFHTTPRequestOperation:

NSOperationQueue *networkQueue = [[NSOperationQueue alloc] init];
networkQueue.maxConcurrentOperationCount = 5;

NSURL *url = [NSURL URLWithString:@"https://example.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    // do whatever you'd like here; for example, if you want to convert 
    // it to a string and log it, you might do something like:

    NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
    NSLog(@"%@", string);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"%s: AFHTTPRequestOperation error: %@", __FUNCTION__, error);
}];
[networkQueue addOperation:operation];

不过，理想情况下，建议编写返回 JSON（或 XML）的服务器代码，因为这样更容易让应用使用和解析。

Answer 2

//AFN 2.0 is just support IOS 7,and it's standard use as follow:

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:@"http://example.com/resources.json" 
  parameters:nil
     success:^(AFHTTPRequestOperation *operation, id responseObject) {
               NSLog(@"JSON: %@", responseObject)
     }failure:^(AFHTTPRequestOperation *operation, NSError *error) {
               NSLog(@"Error: %@", error);
     }
];