Objective C: Basic HTTP Authorization

1.  First version of "Authorization":
   

   NSString *loginString = [NSString stringWithFormat:@"%@:%@", [self userName], [self password]];
   NSString *encodedLoginData = [Base64 encode:[loginString dataUsingEncoding:NSUTF8StringEncoding]];  
   NSString *base64LoginData = [NSString stringWithFormat:@"Basic %@",encodedLoginData];
   
   NSURL *url=[NSURL URLWithString:@"http://my_url.com"];
   NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
                   timeoutInterval:10.0];
   
   [request setHTTPMethod:@"POST"];
   
   [request setValue:base64LoginData forHTTPHeaderField:@"Authorization"];
   
   NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
   

2. Second version of "Authorization":
   

   NSURL *URL = [NSURL URLWithString:url];
   NSURLRequest *request = [NSURLRequest requestWithURL:URL
                                            cachePolicy:NSURLRequestUseProtocolCachePolicy
                                        timeoutInterval:10.0];
   
   NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
   

   NSURLConnection Delegates
   

   - (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
       if ([challenge previousFailureCount] == 0) {
           NSLog(@"received authentication challenge");
           NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"USER"
                                                                       password:@"PASSWORD"
                                                                    persistence:NSURLCredentialPersistenceForSession];
           NSLog(@"credential created");
           [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
           NSLog(@"responded to authentication challenge");    
       }
       else {
           NSLog(@"previous authentication failure");
       }
   }