request a webpage that uses windows authentication

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I'm new to objective c and what i'm trying to do is request the source code of a webpage that uses network credentials authentication. I used to do it in C# using httpwebrequest and network credentials but any ideas how to do this in objective C.

Posted 8-Mar-12 4:36am

smooze

Updated 8-Mar-12 5:16am

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Sathish Kumar Namachivayam · Answer 1 · 2012-05-21T23:46:00

For authentication u need to use NSUrlConnection and its delegate methods.

Delegate methods:

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[connection cancel]; // connection is an NSUrlConnection object
connection=nil;

// Do ur code here
}

-(BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection
{
return NO;
}

-(BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace*)protectionSpace
{
if ([protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodHTTPBasic] ||
[protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodHTTPDigest])
{
//NSLog(@"NSURLAuthenticationMethodHTTPBasic");
if (nil != usernameTextField.text)
return YES;

[self showAlertView];
[connection cancel];
connection = nil;
return NO;
}
else
{
//NSLog(@"NSURLAuthenticationMethodClientCertificate or NSURLAuthenticationMethodServerTrust");
return NO;
}
return YES;
}

-(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
if ([challenge previousFailureCount] == 0)
{
NSURLCredential *newCredential;

newCredential = [NSURLCredential credentialWithUser:usernameTextField.text

password:passwordTextField.text

persistence:NSURLCredentialPersistencePermanent];

[[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];

[usernameTextField release], usernameTextField = nil;
[passwordTextField release], passwordTextField = nil;
}
else
{
[[challenge sender] cancelAuthenticationChallenge:challenge];
// inform the user that the user name and password
// in the preferences are incorrect
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Preferences Credentials Are Incorrect" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
[alertView show];
[alertView release];
}
}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Cannot Open Page"
message:@"Server is not responding"
delegate:nil cancelButtonTitle:@"Ok"
otherButtonTitles:nil];

[alert show];
[alert release];
}

-(void)showAlertView
{
NSString *messageString = connectionString;
if (messageString.length > 32)
messageString = [messageString substringToIndex:32];
messageString = [messageString stringByAppendingString:@"\n\n\n\n"];

if(nil != authenticateAlertView)
[authenticateAlertView release], authenticateAlertView = nil;

authenticateAlertView = [[UIAlertView alloc] initWithTitle:@"Authentication Required" message:messageString delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Log In", nil];
authenticateAlertView.tag = 1001;
[authenticateAlertView show];

if (nil != usernameTextField)
[usernameTextField release], usernameTextField = nil;
usernameTextField = [[UITextField alloc] initWithFrame:CGRectMake(14, 75, 255, 25)];
usernameTextField.placeholder = @"Username";
usernameTextField.backgroundColor = [UIColor clearColor];
[usernameTextField setBorderStyle:UITextBorderStyleRoundedRect];
usernameTextField.autocapitalizationType = UITextAutocapitalizationTypeNone;
usernameTextField.autocorrectionType = UITextAutocorrectionTypeNo;
usernameTextField.keyboardType = UIKeyboardTypeAlphabet;
usernameTextField.returnKeyType = UIReturnKeyDefault;
usernameTextField.delegate = nil;
usernameTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
usernameTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

if (nil != passwordTextField)
[passwordTextField release], passwordTextField = nil;
passwordTextField = [[UITextField alloc] initWithFrame:CGRectMake(14, 105, 255, 25)];
passwordTextField.placeholder = @"Password";
passwordTextField.backgroundColor = [UIColor clearColor];
[passwordTextField setBorderStyle:UITextBorderStyleRoundedRect];
passwordTextField.autocapitalizationType = UITextAutocapitalizationTypeNone;
passwordTextField.autocorrectionType = UITextAutocorrectionTypeNo;
passwordTextField.secureTextEntry = YES;
passwordTextField.keyboardType = UIKeyboardTypeAlphabet;
passwordTextField.returnKeyType = UIReturnKeyDefault;
passwordTextField.delegate = nil;
passwordTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
passwordTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

[authenticateAlertView addSubview:usernameTextField];
[authenticateAlertView addSubview:passwordTextField];
}