Authenticating Iphone Login with PHP/MySQL and HTTP Responses.

Question

Hi there, Im trying to create a iPhone Objective C login page using PHP/MySQL to authenticate. Im trying to use HTTP responses as a way of authenticating. Right now it always fails to login , regardless of what you enter.

`- (IBAction) login: (id) sender { // this part isnt really implemented yet! NSString *post =[NSString stringWithFormat:@"username=%@&password=%@",usernameField.text, passwordField.text];

NSURL *url = [NSURL URLWithString:@"MY URL HERE.php"];

NSURLRequest *request = [NSURLRequest requestWithURL: url];

NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)request; responseStatusCode = [httpResponse statusCode];

NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:response error:nil];

if ([responseStatusCode statusCode] == 200) {
//do something UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"success" message:@"Your have logged in" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil]; [alertsuccess show]; [alertsuccess release]; }

else { NSLog(@"Login failed."); //do something else UIAlertView *alertfail = [[UIAlertView alloc] initWithTitle:@"fail" message:@"login fail" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil]; [alertfail show]; [alertfail release];
} `

and the PHP looks like

<?

session_start(); require("iphoneconnection.php");

$u = $_POST['username']; $pw = $_POST['password'];

$check = "SELECT username, password FROM iphoneusers WHERE username='$u' AND password= '$pw'";

$login = mysql_query($check, $connect) or die(mysql_error());

// check user level and store in $row

if (mysql_num_rows($login) == 1) { $row = mysql_fetch_assoc($login); //$_SESSION['level'] = $row['level']; $_SESSION['username'] = $u; echo 'login success'; header("HTTP/1.1 200 OK");

//header("Location: index.php");

} else { //header("Location: login.php"); //echo '403 Forbidden'; header("403 Forbidden"); }

mysql_close($connect);

?>

Anyone got any pointers? Even if its just to tell me if Im formatting my repsonses correctly in the PHP.

Thanks in advance.

Answer 1

According to the sample you've given, I don't see that you're actually sending the username & password with the request. You're creating a string "post", but never including it in the request.

Also, this cast:

NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)request;

doesn't look right. Why are you typecasting the request object to a response?

Answer 2

Thanks for the response. I got it to work using:

• (IBAction) login: (id) sender

{

NSString *post =[NSString stringWithFormat:@"username=%@&password=%@",usernameField.text, passwordField.text];

NSString *hostStr = @"MY URL.php?";
hostStr = [hostStr stringByAppendingString:post];
NSData *dataURL =  [NSData dataWithContentsOfURL: [ NSURL URLWithString: hostStr ]];    
NSString *serverOutput = [[NSString alloc] initWithData:dataURL encoding: NSASCIIStringEncoding];
if([serverOutput isEqualToString:@"Yes"]){
    UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"success" message:@"You are authorized"
                                                          delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
    [alertsuccess show];
    [alertsuccess release];

} else {
    UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"Fail" message:@"Invalid Access"
                                                          delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
    [alertsuccess show];
    [alertsuccess release];

}

loginIndicator.hidden = FALSE;
[loginIndicator startAnimating];
loginButton.enabled = FALSE;

}

Answer 3

I'm working on a similar project. Would it be possible to get the PHP file that this method sends the "post" string to?

Thanks, Jon