AFNetworking: Handle error globally and repeat request

Question

I have a use case that should be rather common but I can\'t find an easy way to handle it with AFNetworking:

Whenever the server returns a specific status code for <

Answer 1

In the AFHTTPClient's init method register for the AFNetworkingOperationDidFinishNotification which will be posted after a request finishes.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(HTTPOperationDidFinish:) name:AFNetworkingOperationDidFinishNotification object:nil];

In the notification handler check the status code and copy the AFHTTPRequestOperation or create a new one.

- (void)HTTPOperationDidFinish:(NSNotification *)notification {
  AFHTTPRequestOperation *operation = (AFHTTPRequestOperation *)[notification object];

    if (![operation isKindOfClass:[AFHTTPRequestOperation class]]) {
        return;
    }

    if ([operation.response statusCode] == 401) {
        // enqueue a new request operation here
    }
}

EDIT:

In general you should not need to do that and just handle the authentication with this AFNetworking method:

- (void)setAuthenticationChallengeBlock:(void (^)(NSURLConnection *connection, NSURLAuthenticationChallenge *challenge))block;