changing what AJAX does on return from php?

shaunthomson · 07-17-2012, 04:48 AM

Gidday

I'm using AJAX to run a simple php script that updates a database. On success, php echoes a success message, which gets displayed in a javascript alert.

I also have a totally separate timeout script running on all pages, to check for inactivity of more than 20mins. If there is a timeout, the user gets redirected to the login page like so:

header('Location: http://www.mysite.com/login');

The timeout works fine, except when using ajax as above, the whole login page html gets displayed in the alert.

It makes sense to me why it does it, but I'm unsure of the correct way to get around the problem. Is there a way to override the AJAX process in the event of a timeout, and redirect to the login page?

Thanks for your time and help.

WolfShade · 07-17-2012, 01:22 PM

Can't say without seeing your code. (Please use the CODE tags.)

shaunthomson · 07-17-2012, 02:01 PM

The AJAX is:

Code:

	
$('.w').live("click",function() {	
	
  var id2 = $(this).attr("id");
  var dataVar2 = {s:id2 };		
	
  $.ajax({
			
    type: "POST",
    url: "<?php $_SERVER['DOCUMENT_ROOT'] ?>/save.php",			
    data: dataVar2,			
    beforeSend:  function() {
	<!---->  
    },
				
    success: function(data){
    
    alert(data);
    },
    error: function(data){
    alert('Site error 1: Connection failure.  If the problem persists, please contact support');
  }
  });				
		
 return false;	
});

The save.php is:

PHP Code:


			
if (isset($_SESSION['uname'])) {



    if (isset($_POST['mydata'])) {

        

        $ID =     $_POST['mydata'];    

        

        if (is_numeric ($ID)) {        

        

            save($ID);        

        }

        else {

            

            echo 'The data sent was suspicious and did not pass validation';

        }    

    }

    else {

        

        header('Location: http://www.mysite.com');

    }    

}

else {

    

    echo 'You must be logged in to do that.';    

    

}



function save($ID){    



    $ID = mysql_real_escape_string($ID);    

    

    $query  = "INSERT INTO `mycol`(`u_id`) VALUES ('{$ID}')";

    

    if (!($result = mysql_query($query))) {echo 'Site error 2: Connection failure.  If the problem persists, please contact support';} else {

        

        echo 'The data was added';

    }

}

The php timeout script, which redirects to a standard login form page:

PHP Code:


			
if (isset($_SESSION['u_name'])) {

        

    if (isset($_SESSION['LAST_ACTIVITY']) && (time() - $_SESSION['LAST_ACTIVITY'] > 1800)) {//if last request was more than 30 minutes ago, expire...

    

        $error_message = 'Your session timed out as your last activity was over 30 mins ago.  Please login again:';

        forceLogin($error_message);

        exit();

    }

    

    $_SESSION['LAST_ACTIVITY'] = time();

}







function forceLogin($error_message) {    

    

    $_SESSION = array();

    session_destroy();

    

    session_start();

    session_regenerate_id();

        

    $_SESSION['LOGIN_ERROR_MESSAGE'] = $error_message;    



    

    header('Location: http://www.mysite.com/login');    

}

Cheers

sunfighter · 07-17-2012, 10:24 PM

Why not have a universal lockout var set to false. When your click function starts ajax set the lockout to true. When the alert is shown reset lockout to false.

In your timer have it check the lockout var just before the relocation, abort and reset the timer if it is true.

rnd me · 07-18-2012, 06:13 AM

look for the html of the page and do the right thing if it shows up:

Code:

 success: function(data){
    if(  String(data).match(/<head>/i) ){ 
     return location.href="http://www.mysite.com/login"; 
  }   


    alert(data);
    },

shaunthomson · 07-24-2012, 05:55 PM

Cheers guys - I'm looking into the suggested ideas. Much appreciated.