Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

ColdFusion, detecting session timeout

Posted on 2009-04-08
10
Medium Priority
?
1,950 Views
Last Modified: 2013-12-24
Is there a SIMPLE way to detect a session time out in ColdFusion and force a redirect to a specific URL?  Either due to no activity or the sessiontimeout="#CreateTimeSpan(0,1,0,0)#" has expired.

0
Comment
Question by:PhotoMan2000
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 2
  • 2
  • +1
10 Comments
 

Author Comment

by:PhotoMan2000
ID: 24098661
Thanks.. regarding this link: http://coldfusion.sys-con.com/node/41925

It's from 2000 - hasn't CF come out with anything less complex? Such as doing something like this:

(Which is what I'm really after)
<cfif session.sessiontimeout LT '00:00:00:20'>
do something - like a cflocation or an alert.
</cfif>

Open in new window

0
 
LVL 19

Accepted Solution

by:
erikTsomik earned 500 total points
ID: 24098809
Or try this
<cfif StructKeyExists(session,nameofthesession>
go
</cfif>
0
Looking for a new Web Host?

Lunarpages' assortment of hosting products and solutions ensure a perfect fit for anyone looking to get their vision or products to market. Our award winning customer support and 30-day money back guarantee show the pride we take in being the industry's premier MSP.

 
LVL 1

Expert Comment

by:vonRogue
ID: 24099812
The CFIF code will not work, due to the way sessions are timed. As soon as a user requests a page, their session timeout is reset to it's default (20 minutes for a default CF install). Basically, this means that you can't see how much time is left in that specific session by using server side code. The only way you'll be able to redirect them is by using something like the javascript code erik mentioned above. I hope this clears things up a bit.
0
 

Author Comment

by:PhotoMan2000
ID: 24100074
Thanks vonRoque..  It's too bad Adobe  hasn't thought of such a simple concept to have native time feature.
(Note.. I'll be out of the office for a week, so pleases don't freak if I don't get back to this quesion.)
0
 
LVL 39

Expert Comment

by:gdemaria
ID: 24100222
> It's too bad Adobe  hasn't thought of such a simple concept to have native time feature.

This is a browser level issue, client-side, coldfusion or any other server-side language cannot have any control over it.   That's why vonRoque suggested javascript because it runs client-side.

When the page loads, set a timer running that is in-line with your session time-out.   Have the javscript redirect you to a login page that drops the session.
0
 

Author Comment

by:PhotoMan2000
ID: 24193995
Basically none of the above worked.. I had to resort to testing for defined session variable.

Thanks,

<cfif structKeyExists(session, 'membertype')>
do this..
<cfelse>
do soemthine else
</cfif>

Open in new window

0
 

Author Comment

by:PhotoMan2000
ID: 24194005
Actually erikTsomik's worked...
0
 
LVL 39

Expert Comment

by:gdemaria
ID: 24194333
I guess we misinterpreted your question.   We thought you meant that if the page sits idle for 20 minutes, the page would automatically change to a session-timed-out page without user intervention.   Banking sites or credit card sites often do this in case someone walks away from the computer.

The solution with session variable testing will work, of course (that's what they're for) when the user attempts to go to another page.   The new page will catch the fact that the session variable no longer exists and sends you to the login page (or whatever).

We over-thought your question expecting it would be more than just testing for a session variable..
Another approach is...

<cfif NOT isDefined("session.user_id"")
    <cfinclude template="login.cfm">
    ...


0
 

Author Comment

by:PhotoMan2000
ID: 24194486
Yes. that is what my original question was.  But in doing searching and the input fom EE, and without having to figure out a JavaScript that would accomplish the task (noone actually provided me with a script) - i had to resort to testing for the existance of a defined variable name. Which does no exist after the session times out.  

So, iF the user tries to load a page and the value is not there, they are sent back to the login page with an  message being displayed. Not as user friendly as automatically forwarding the user, but it got the job done.

Thanks for the feedback.
<cfif structKeyExists(session, 'membertype')>
 <cfelse if session.membertype EQ XYX>do this</>
<cfelse>
 <cflocaion url="abc.cfm?timeout">
</cfif>

Open in new window

0

Featured Post

Plesk WordPress Toolkit

Plesk's WordPress Toolkit allows server administrators, resellers and customers to manage their WordPress instances, enabling a variety of development workflows for WordPress admins of all skill levels, from beginners to pros.

See why 2/3 of Plesk servers use it.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In our day to day coding, how many times have we come across a necessity to check whether a URL is a broken link or not? For those of you that answered countless and are using ColdFusion like myself, then this article is for you.  It will show yo…
One of the typical problems I have experienced is when you have to move a web server from one hosting site to another. You normally prepare all on the new host, transfer the site, change DNS and cross your fingers hoping all will be ok on new server…
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…

610 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question