source: gs2-extensions/iOS-1.x/trunk/NSURLConnection-example.mm@ 28647

// create the request

NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.apple.com/"]

                        cachePolicy:NSURLRequestUseProtocolCachePolicy

                    timeoutInterval:60.0];

// create the connection with the request

// and start loading the data

NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

if (theConnection) {

    // Create the NSMutableData that will hold

    // the received data

    // receivedData is declared as a method instance elsewhere

    receivedData=[[NSMutableData data] retain];

} else {

    // inform the user that the download could not be made

}

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

{

    // this method is called when the server has determined that it

    // has enough information to create the NSURLResponse

 

    // it can be called multiple times, for example in the case of a

    // redirect, so each time we reset the data.

    // receivedData is declared as a method instance elsewhere

    [receivedData setLength:0];

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data

{

    // append the new data to the receivedData

    // receivedData is declared as a method instance elsewhere

    [receivedData appendData:data];

}

- (void)connection:(NSURLConnection *)connection

  didFailWithError:(NSError *)error

{

    // release the connection, and the data object

    [connection release];

    // receivedData is declared as a method instance elsewhere

    [receivedData release];

 

    // inform the user

    NSLog(@"Connection failed! Error - %@ %@",

          [error localizedDescription],

          [[error userInfo] objectForKey:NSErrorFailingURLStringKey]);

}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection

{

    // do something with the data

    // receivedData is declared as a method instance elsewhere

    NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]);

 

    // release the connection, and the data object

    [connection release];

    [receivedData release];

}