Control user actions with jQuery_问答_开发者_运维开发者技术经验分享

开发者 https://www.devze.com 2022-12-31 07:30 出处：网络

I want to write javascript that will kill sestion on the web page if user did not make any action for some time taken from configuration.

相关专题：jquery session

I want to write javascript that will kill sestion on the web page if user did not make any action for some time taken from configuration. How can I know that user did not make any actions by using jQuery.

开发者_JAVA技巧

Thanks a lot.

You could trap the mousedown and keydown events for the entire document, and then setup a timeout to run if the events are not raised within a certain timeframe:

<html>
  <head>
    <script type="text/javascript" src="jquery-1.4.2.min.js"></script>

    <script type="text/javascript">
        var _idleEventId = null;
        var _idleMaxMilliSeconds = 10000;

        function OnIdle() {
            alert('You\'re idle!');
        }

        $(document).bind("mousedown keydown", function() {
            clearTimeout(_idleEventId);
            _idleEventId = setTimeout(OnIdle, _idleMaxMilliSeconds);
        });

        $(document).ready(function() {
            _idleEventId = setTimeout(OnIdle, _idleMaxMilliSeconds);
        });
    </script>
  </head>
  <body>
    Hello World
  </body>
</html>

how to use cookie just in case: http://www.w3schools.com/JS/js_cookies.asp

then i would have like this

NOTE: just a proof of concept not tested!

setInterval("checkForActivity()", 5000); //set a reasonable time..

function checkForActivity() {
    var user_has_moved_at = (new Date()).getTime(); //generate a time
    var time_elapsed = getCookie( COOKIE_NAME ); //get a time from previous stored
    //check how many time is passed from last move
    if ( ( user_has_moved_at - time_elapsed ) < 3600 ) { 
     //less then 1 hour.. user is still here..
        $(document.body).bind('mousemove',
        function() {
         // so update the fresh air...
            setCookie( COOKIE_NAME , user_has_moved_at);
         // unbind event
            $(document.body).unbind('mousemove');
        });

    } else {
     // more then 1 hour... destroy cookie... user is out
        setCookie(COOKIE_NAME, null); //destroy cookie
    }

};

To check, that a user didn't do anything, you could watch for events that signify user interaction:

var last_seen = 0;
var timeout = null;
$('body').mousemove(function () {
  last_seen = (new Date()).getTime();
  window.clearTimeout(timeout);
  timeout = window.setTimeout(clear_da_session, 10000);
});
/* ...  and likewise for things like
   $('input').focus();
   $('a').click();
   and 'keypress' events
*/

The clearTimeout and setTimeout stuff takes care of something (i.e. the clear_da_session function) happening after some time of not firing any of the listed events.

However, I want to re-emphasize my comment from above: Don't do this at home, kids! Use whatever your serverside language has on board. This is by far more reliable than trying to track something, that might be untrackable.