如何使用 AFHTTPSessionManager 记录每个请求/响应？

Question

我正在将我的项目迁移到 AFNetworking 2.0。在使用 AFNetworking 1.0 时，我编写了代码以在控制台中记录每个请求/响应。代码如下：

-(AFHTTPRequestOperation *)HTTPRequestOperationWithRequest:(NSURLRequest *)request
                                                   success:(void (^)(AFHTTPRequestOperation *, id))success
                                                   failure:(void (^)(AFHTTPRequestOperation *, NSError *))failure
{
    AFHTTPRequestOperation *operation =
    [super HTTPRequestOperationWithRequest:request
        success:^(AFHTTPRequestOperation *operation, id responseObject){
             [self logOperation:operation];
             success(operation, responseObject);
        }
        failure:^(AFHTTPRequestOperation *operation, NSError *error){
             failure(operation, error);
    }];

    return operation;
}

-(void)logOperation:(AFHTTPRequestOperation *)operation {

    NSLog(@"Request URL-> %@\n\nRequest Body-> %@\n\nResponse [%d]\n%@\n%@\n\n\n",
    operation.request.URL.absoluteString,
    [[NSString alloc] initWithData:operation.request.HTTPBody encoding:NSUTF8StringEncoding],
    operation.response.statusCode, operation.response.allHeaderFields, operation.responseString);
}

我正在尝试使用 AFNetworking 2.0 做同样的事情，据我了解，这意味着使用 NSURLSessionDataTask 对象而不是 AFHTTPRequestOperation。这是我的尝试。

-(NSURLSessionDataTask *)dataTaskWithRequest:(NSURLRequest *)request completionHandler:(void (^)(NSURLResponse *, id, NSError *))completionHandler {

    NSURLSessionDataTask *task = [super dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error){

        [self logTask:task];
        completionHandler(response, responseObject, error);
    }];

    return task;
}

-(void)logTask:(NSURLSessionDataTask *)task {

    NSString *requestString = task.originalRequest.URL.absoluteString;
    NSString *responseString = task.response.URL.absoluteString;

    NSLog(@"\n\nRequest - %@\n\nResponse - %@\n\n", requestString, responseString);
}

dataTaskWithRequest:completionHandler 方法成功拦截了每个调用，所以我认为这是正确的重写方法，但是当我尝试在 completionHandler 中记录任务时，task 为 nil。从而在控制台中打印空值。但是，该方法仍会返回正确的任务对象。这里发生了什么事？如何正确记录每个呼叫的请求/响应？

Answer 1

您可以使用库 AFNetworking/AFNetworkActivityLogger

https://github.com/AFNetworking/AFNetworkActivityLogger

来自文档：

AFNetworkActivityLogger 是 AFNetworking 2.0 的扩展，用于记录 发送和接收网络请求。

用法：

[[AFNetworkActivityLogger sharedLogger] startLogging];

输出：

GET http://example.com/foo/bar.json
200 http://example.com/foo/bar.json

使用开发日志级别，您应该也有 responseHeaderFields 和 responseString