我想在每个浏览器中关闭浏览器后注销我的应用程序？

Question

I am calling this code by this window.onbeforeunload=HandleOnClose;

This is working fine in IE but not in other browsers. This code is specific for IE but this is not working in other browsers. How can we detect close event of browser in all the browser ?

function ConfirmClose()
    {
        if (isIE7Min) //To check for IE Version 7.0 and above
        {   
          var n = window.event.screenX - window.screenLeft; 
          var b = n > document.documentElement.scrollWidth-20;
            if ((b && window.event.clientY < 0) || window.event.altKey) 
            {
                if (!self.closed)
                {
                    refresh = true;
                }
            }
        }
        else   //IE Version 6.0 and below
        {
            if (event.clientY < 0 && event.clientX < 0)
            {
                if (!self.closed)
                {
                    refresh = true;
                }
            }
        }
    }

    /*Function for onunload*/

    function HandleOnClose()
    {

        ConfirmClose();

        if (isIE7Min)
        {

            if ((window.event.clientX > 0 && window.event.clientY < 0) || window.event.altKey) 
            {
                if (refresh == true) 
                {           
                    window.open("/DealPricingJavaUAT/DealPricingJsp/Home/logout.jsf");
                    //Code That redirects to the Session Invalidation Page
                }
            }
        }
        else
        {

            if (event.clientY < 0 && event.clientX < 0 || window.event.altKey)
            {
                if (refresh == false) 
                {                      
               window.open("/DealPricingJavaUAT/DealPricingJsp/Home/logout.jsf");
                // Code That redirects to the Session Invalidation Page    
                }
            }
        }
    }

Answer 1

I don't think it is possible to always log user out. If there is a crash on user's web browser, the client-side code will never get executed. Some web browsers shutdown itself very fast and don't wait to execute the client-side code.

You should find an alternative solution, like logging out on server side if user is not active for certain period of time.

Answer 2

Its not possible to detect when the user closes the browser. If you are using java and using cookies to check if the user is logged-in, you can do cookie.setMaxAge(-1).

This will make sure that cookies are deleted when browser closes.