How to check automatically for "end of session" and force a page redirection?

[Athenian]

Hi guys.

Currently I need a javascript (client side) or vbscript(server side)
code to check automatically for session expiration and force the
redirection to a message page or the log-in page. All web site is built
around asp pages.

Thank you very much for your help

 

[RobG]

Hi guys.

Currently I need a javascript (client side) or vbscript(server side)
code to check automatically for session expiration and force the
redirection to a message page or the log-in page. All web site is built
around asp pages.

Use either setTimeout or setInterval to send an intermittent
XMLHttpRequest from the client to check with the server to see if the
session is still active at say 1 minute intervals. If the session has
timed-out, redirect.

It may be unreliable.

 

[Jeremy]

Hi guys.

Currently I need a javascript (client side) or vbscript(server side)
code to check automatically for session expiration and force the
redirection to a message page or the log-in page. All web site is built
around asp pages.

Thank you very much for your help

Please clarify: do you want them to be taken to a log-in page
immediately when their session expires, or the next time they request a
page and their session has expired?

If it's the former (which is a bad idea - what if they are working on
something when their session expires? They are whisked away to a login
page whether they like it or not? Some action on their end - i.e.
requesting a page - should happen before you do this) then RobG's
suggestion is what you're looking for.

If it's the latter, you should ask in an ASP group. But it will go
something like this (note, this is C# code as I don't use VBScript):

if(Session["key_to_check"] == null)
Response.Redirect("/myloginpage.asp");

If you have authorization code already, I would be surprised if this
code isn't already included. If the user's session is no longer valid,
and they are still able to access protected pages, your site is a
desperately insecure.

Jeremy