AFNetworking 2.0 // 如何读取响应头

Question

我正在使用新版本的 AFNetworking，但我不知道如何读取响应的标头。 我正在使用 AFHTTPSessionManager 执行我的查询，一切正常，但我无法找到标题响应字段。

我是这样处理的

self.sessionManager = [[AFHTTPSessionManager alloc] initWithBaseURL:[NSURL URLWithString:BASE_URL]];
[self.sessionManager GET:urlId parameters:nil
    success:^(NSURLSessionDataTask *task, id responseObject) {
        if ([self.delegate respondsToSelector:@selector(userIsLoadedWithInfos:)]) {
            [self.delegate userIsLoadedWithInfos: responseObject];
        }
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        if ([self.delegate respondsToSelector:@selector(userLoadingFailed)]) {
            [self.delegate userLoadingFailed];
        }
    }
];

我试图读取任务的响应属性，但它返回一个不包含标题的 NSURLResponse。

现在有人如何读取 2.0 版本的响应标头吗？

Answer 1

您是否尝试过从返回的 NSURLResponse 获取标头，

您可以尝试使用 NSURLResponse 对象，

NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse*)response;
if ([httpResponse respondsToSelector:@selector(allHeaderFields)]) {
    NSDictionary *dictionary = [httpResponse allHeaderFields];
    NSLog([dictionary description]);
}

希望对您有所帮助！

Answer 2

我将AFHTTPRequestOperationManager 子类化并使用：

- (AFHTTPRequestOperation *)POST:(NSString *)URLString
                      parameters:(NSDictionary *)parameters
                         success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
                         failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure;

我的大多数网络服务请求的方法。使用该方法时，响应标头将成为操作对象的一部分。像这样的：

[self POST:url parameters:newParams success:^(AFHTTPRequestOperation *operation, id responseObject) {
    // Response headers will be a dictionary
    NSDictionary *headers = operation.response.allHeaderFields;
...

Answer 3

比 Viruss mcs 的代码更健壮：

if ([task.response isKindOfClass:[NSHTTPURLResponse class]]) {
    NSHTTPURLResponse *r = (NSHTTPURLResponse *)task.response;
    NSLog(@"%@" ,[r allHeaderFields]);
}

返回

{
    Connection = "Keep-Alive";
    "Content-Length" = 12771;
    "Content-Type" = "application/json";
    Date = "Fri, 06 Dec 2013 10:40:48 GMT";
    "Keep-Alive" = "timeout=5";
    "Proxy-Connection" = "Keep-Alive";
    Server = "gunicorn/18.0";
}

同样，您可以确保使用 [response respondsToSelector:@selector(allHeaderFields)] 正确地进行转换，但您也应该在进行转换之前调用它

if ([task.response respondsToSelector:@selector(allHeaderFields)]) {
    NSHTTPURLResponse *r = (NSHTTPURLResponse *)task.response;
    NSLog(@"%@" ,[r allHeaderFields]);
}

或根本没有演员表：

if ([task.response respondsToSelector:@selector(allHeaderFields)]) {
    NSLog(@"%@" ,[task.response performSelector:@selector(allHeaderFields)]);
}

Answer 4

有趣的是，上面的响应表明参数id responseObject 返回一个NSURLResponse。我在后端运行 JAX-RS 服务器，但得到了不同的响应。当对我的服务器执行curl 命令时，我的响应是这样的：

$ curl -v "http://10.0.1.8:3000/items"
* About to connect() to 10.0.1.8 port 3000 (#0)
*   Trying 10.0.1.8...
* Adding handle: conn: 0x7f9f51804000
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 0 (0x7f9f51804000) send_pipe: 1, recv_pipe: 0
* Connected to 10.0.1.8 (10.0.1.8) port 3000 (#0)
> GET /items HTTP/1.1
> User-Agent: curl/7.30.0
> Host: 10.0.1.8:3000
> Accept: */*
>
< HTTP/1.1 200 OK
< ETag: af0057e2-1c6d-4a47-b81a-a754238b60fd
< Content-Type: application/json
< Content-Length: 255
< Connection: keep-alive
<
* Connection #0 to host 10.0.1.8 left intact
[{"name":"Item1","uid":"F465AAD2-AA39-4C33-A57A-F0543C25C476"},
 {"name":"Item2","uid":"6505A82E-A473-4A7D-BC4B-BCBEFFFE8E9C"}]

我的responseObject 是服务器响应正文中的项目数组，而不是NSURLResponse。以下是我检索标题的方式：

void (^handleSuccess)(NSURLSessionDataTask *, id) = ^(NSURLSessionDataTask *task, id responseObject) {
    // handle response headers
    NSHTTPURLResponse *response = ((NSHTTPURLResponse *)[task response]);
    NSDictionary *headers = [response allHeaderFields];

    // handle response body
    NSArray *responseItems = responseObject;
    for (NSDictionary *item in responseItems) {
        [self.activeDataController createObject:item];
    }
};

Answer 5

对于 Swift 2.0：

if let response = operation.response {
    print(response.allHeaderFields)
}