Redirect to login after ajax call if $_SESSION not set
Question
I have a 'check session' page included on each page I want a $_SESSION is set. This means the 'check session' script is included also on ajax/php pages.
Eg
<?php
require_once globals.php
require_once session.php
?>
<html>
...
<select id="test">
<option>...
<script type="text/javascript">
$('#text').change(function(){
$.ajax({
...
success: function(result){
alert(result);
}
error: ??
)}
});
</script>
<html>
AJAX PHP
<?php
require_once globals.php
require_once session.php
if(isset($_GET['test'])){
...
};
?>
MY session.php (which doesn't work with AJAX calls):
<?php
session_start();
ob_start();
if(!$_SESSION['username']){
header("Location: http://www.mysite.com/login.php");
die();
}
?>
This script redirects me to login.php if $_SESSION is not set only when I load a page normally, but in case of AJAX calls, the JS AJAX function returns error but I'm not able to redirect the user to login.php
I've tried the following:
in JS:
error: function(XMLHttpRequest, textStatus, errorThrown) {
if(XMLHttpRequest.status === 401){
document.location.reload(true);
}
},
in session.php
header("Location: http://www.mysite.com/login.php", true, 401);
This returns a 401 code to JS, and JS reload the current page, calling again session.php which should now normally redirect to login.php.
But it doesn't: with this solution even if I load a page normally without $_SESSION set, I get a blank page. The script die() but doesn't redirect.
How can I solve this with a solution that works for both normal and AJAX requests?
Thank you
1 answers
solution1
2 2014-03-09 19:25:36
You can't redirect a user from an AJAX page, you can on the other hand return a value from it that indicates that you should redirect them, and then do so in the return portion of your AJAX call.
Improvement:
I would suggest doing this in your AJAX page:
<?php
require_once globals.php
if(!isset($_SESSION['username')) {
echo 'redirectUser';
exit;
}
if(isset($_GET['test'])){
...
};
?>
Then in your AJAX call:
$('#text').change(function(){
$.ajax({
...
success: function(result){
if(result === 'redirectUser') {
window.location.href = 'login.php' //or wherever
}else {
//success
}
}
error: ??
)}
});
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