objective c - AFNetworking 2.0 AFHTTPSessionManager: how to get status code and response JSON in failure block?

Question

When switched to AFNetworking 2.0 the AFHTTPClient has been replaced by AFHTTPRequestOperationManager / AFHTTPSessionManager (as mentioned in the migration guide). The very first issue I came across when using the AFHTTPSessionManager is how to retrieve the body of the response in the failure block?

Here's an example:

[self.sessionManager POST:[endpoint absoluteString] parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
    // How to get the status code?
} failure:^(NSURLSessionDataTask *task, NSError *error) {
    // How to get the status code? response?
}];

In the success block I would like to retrieve response's status code. In the failure block I would like to retrieve both response's status code and the content (which is JSON in this case that describes the server-side error).

The NSURLSessionDataTask has a response property of type NSURLResponse, which has not statusCode field. Currently I'm able to retrieve statusCode like this:

[self.sessionManager POST:[endpoint absoluteString] parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
    // How to get the status code?
} failure:^(NSURLSessionDataTask *task, NSError *error) {
    NSHTTPURLResponse *response = (NSHTTPURLResponse *)task.response;
    DDLogError(@"Response statusCode: %i", response.statusCode);

}];

But this looks ugly to me. And still can't figure about the response's body.

Any suggestions?

Answer 1

You can access the “data” object directly from AFNetworking by using the “AFNetworkingOperationFailingURLResponseDataErrorKey” key so there is no need for subclassing the AFJSONResponseSerializer. You can the serialize the data into a readable dictionary. Here is some sample code to get JSON Data :

 NSData *errorData = error.userInfo[AFNetworkingOperationFailingURLResponseDataErrorKey];
 NSDictionary *serializedData = [NSJSONSerialization JSONObjectWithData: errorData options:kNilOptions error:nil];

Here is the code to Get Status code in the Failure block:

  NSHTTPURLResponse* r = (NSHTTPURLResponse*)task.response;
  NSLog( @"success: %d", r.statusCode );