NSURLConnection with dispatch_async

gistfile1.txt

    [self dispatch:^{
        id response = [Performer perform:[NSURL URLWithFormat:kChannelsURL, [NSString currentCountryCode]] error:NULL];
    }];

Performer.m

- (id)perform:(NSURL *)url data:(id)data error:(NSError **)error {
    static NSString * const kXRegionHeaderField = @"X-Region";

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    [request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request addValue:@"application/json" forHTTPHeaderField:@"Assept"];
    [request addValue:[UserDataKeeper sharedDataKeeper].countryCode forHTTPHeaderField:kXRegionHeaderField];

    [request setHTTPMethod:data ? @"POST" : @"GET"];

    if (data) {
        [request setHTTPBody:[[data JSONRepresentation] dataUsingEncoding:NSUTF8StringEncoding]];
    }

    NSURLConnection *connection = [[[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO] autorelease];
    [connection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [connection start];

    while (!done) {
        [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
    }

//    if (error != NULL && self.error) {
//        *error = self.error;
//    }

    return self.response;
}