I need this jquery/ajax script to run every 30 seconds

Question

Now I have been puzzling with this for some time. I got part of it together in jquery/ajax:

<script type="text/javascript">
$(document).ready(function(){
    jQuery.ajax({
        type: "GET",
        url: "sessioncheck.php",
        dataType:"json",
        success:function(response){
            if (response) {
                window.location.href = 'logout.php';
            }
            else {
                // Process the expected results...
            }
        }

    });
});
</script>

This works perfectly, but I would like this process to repeat itself every 30 seconds. Can someone please help me with that? I have read something about setinterval, but I cant seem to get it to work.

Thanks a lot in advance for all of your help!

why? If you're doing session management, the server should already be able to take care of this by comparing last-active times on the session, you don't need the client to ping the server every X seconds. — Mike 'Pomax' Kamermans, Jun 11 '13 at 01:47
Because if they login from another location, I want the old session to log off automatically. In other words, they can then only be logged in once. — ManouHH, Jun 11 '13 at 01:48
If it is important, you should do that server-side as javascript is easily disabled. — jeroen, Jun 11 '13 at 01:49
The site serves with streams and without javascript the stream will not load. So that isn't really a problem. It would be better to do this server side though, but I can't think of a way to do that.. — ManouHH, Jun 11 '13 at 01:55

score 10 · Answer 1 · answered Jun 11 '13 at 01:47

10

$(document).ready(function(){
    setInterval(function() {
        jQuery.ajax({
            type: "GET",
            url: "sessioncheck.php",
            dataType:"json",
            success:function(response){
                if (response) {
                    window.location.href = 'logout.php';
                }
                else {
                    // Process the expected results...
                }
            }

        });
    }, 30000);
});

answered Jun 11 '13 at 01:47

Barmar

741,623
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1

It should be noted that this method will initiate the request every 30 seconds, but the responses may be delayed or even returned out of order. – George Cummins Jun 11 '13 at 01:53
@GeorgeCummins If the server takes more than 30 seconds to respond to this, he probably has bigger problems to worry about. – Barmar Jun 11 '13 at 01:55
@GeorgeCummins Then just cancel the previous request on the next iteration. – Ja͢ck Jun 11 '13 at 02:00

score 4 · Answer 2 · answered Jun 11 '13 at 01:47

Add a interval like this.

<script type="text/javascript">
$(document).ready(function(){
    setInterval(function(){
        jQuery.ajax({
            type: "GET",
            url: "sessioncheck.php",
            dataType:"json",
            success:function(response){
                if (response) {
                    window.location.href = 'logout.php';
                }
                else {
                    // Process the expected results...
                }
            }
        });
    }, 30000);
});
</script>

More info here: http://www.jquery4u.com/jquery-functions/setinterval-example/

Kylie · Answer 3 · 2013-06-11T02:00:36.153

2

Just do a setInterval...

  <script type="text/javascript">
   $(document).ready(function(){
   setInterval(function(){
    jQuery.ajax({
        type: "GET",
        url: "sessioncheck.php",
        dataType:"json",
        success:function(response){
            if (response) {
                window.location.href = 'logout.php';
            }
            else {
                // Process the expected results...
              }
           }
        });
    }, 30000);
  });
  </script>

edited Jun 11 '13 at 02:00

answered Jun 11 '13 at 01:49

Kylie

11,421
11
47
78

rats....man Im so slow at typing...lol – Kylie Jun 11 '13 at 01:49
This will only run once in 30 seconds... not every 30 seconds – Jeff Jun 11 '13 at 01:51

I need this jquery/ajax script to run every 30 seconds

3 Answers3