Question

I just started iOS programming and am failing to understand this.. I am trying to connect to a website that has a login.. I am using NSURLConnection and POST, and sending my login credentials..

The credentials are right and the connectionDidFinishLoading: is called but it is not completely logged into the site.. the login is partially complete..I identified this when I looked at the response.. As per my understanding the “connectionDidFinishLoading” is called only after the connection is complete.. I am definitely missing something here.. My code is below.. Please advice..

- (IBAction)connect:(id)sender {
    // Login to the website
    urlRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.mywebsite.com/login"]
                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                   timeoutInterval:60.0];

    NSString *post = @"username=myname&password=mypassword";
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];

    [urlRequest setHTTPMethod:@"POST"];
    [urlRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [urlRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [urlRequest setHTTPBody:postData];

    // Start the connection request
    urlConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
}

Here, when I log the response, it is incomplete.. It is landing in a page that is between the final SUCCESS page.. So the authentication is partially complete..Do I need to include any delay? Please help..

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSLog(@"Connection success.");
    NSURLResponse *responseTest;
    NSError *error;

    NSData *responseDataTest = [NSURLConnection sendSynchronousRequest:urlRequest       returningResponse:&responseTest error:&error];

    NSString *responsestring = [[NSString alloc] initWithData:responseDataTest encoding:NSASCIIStringEncoding];
    NSLog(@"Recieved response.. %@",responsestring);
}

Thanks in advance..

Answer 1

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response

Try using this method instead. According to the docs it is “Sent when the connection has received sufficient data to construct the URL response for its request. (required)”