NSURLConnection

NSURLConnection

-(void) downloadAndParse 
{    
    NSURL *nsurl = [[[NSURL alloc] initWithString:@"http://10.230.148.253:8080/IDP/services/login/authuser"] autorelease];  
    NSMutableURLRequest*   urlRequest = [[[NSMutableURLRequest alloc] initWithURL:nsurl] autorelease]; 
    NSURLConnection* conn  = [NSURLConnection connectionWithRequest:urlRequest delegate:self];
    if(conn)
    {
       // Declare an iVar NSMutableData* responseData
       responseData = [[NSMutableData alloc] init];
    }   
}

-(NSCachedURLResponse *)connection:(NSURLConnection *)connection
                 willCacheResponse:(NSCachedURLResponse *)cachedResponse
{
  return nil;
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
   NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
   NSInteger statusCode = [httpResponse statusCode];
   NSLog(@"Http Status Code: %i",statusCode);
   if ([response respondsToSelector:@selector(statusCode)])
{
  int statusCode = [((NSHTTPURLResponse *)response) statusCode];
  if (statusCode >= 400)
  {
    [connection cancel];  // stop connecting; no more delegate messages
    NSDictionary *errorInfo
      = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:
          NSLocalizedString(@"Server returned status code %d",@""),
            statusCode]
                                    forKey:NSLocalizedDescriptionKey];
    NSError *statusError
      = [NSError errorWithDomain:NSHTTPPropertyStatusCodeKey
                            code:statusCode
                        userInfo:errorInfo];
    [self connection:connection didFailWithError:statusError];
  }
}
   [responseData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
   [responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection
  didFailWithError:(NSError *)error
{
   NSLog(@"Connection failed! Error - %@ %@",
          [error localizedDescription],
          [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
   connection = nil;
   [responseData release],responseData = nil;
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
   NSString *result =[[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];   
   NSLog(@"downloaded idp output  %@",result);

   [result release];
   [responseData release];     
}