Solved

When sessions is timeout , a new javascript window appears on screen?

Posted on 2004-08-25
9
321 Views
Last Modified: 2012-06-27
Hi dear experts,
I am using tomcat 5.0.x and developing web application with jsp. When my client session is time out , I want to show popup window saying that "your session is dead because you didnt do anything for 15 minutes".
How can i do this ?  to know when session it time out i have to write a listener  but how can i popup a windows through servlet or jsp when session is time out?
0
Comment
Question by:elmakarge
  • 3
  • 3
9 Comments
 
LVL 35

Accepted Solution

by:
TimYates earned 63 total points
ID: 11900176
This will have to be on a page refresh, you cannot just pop windows up without the client requesting a page

Also, remember that new browsers block popups (IE 6, SP2 -- Firefox -- Opera), so most people won't see your popup anyway...

When the session times out, it is destroyed, so you will have to check for a value in the current session.  If the value is not there, tell them they have to log in (and that it may be because they timed out), then send them to the login page (you can store the current page in the session, so they can automatically return to their current page after a successful login)

Tim
0
 
LVL 19

Assisted Solution

by:ramazanyich
ramazanyich earned 62 total points
ID: 11900204
You can't initiate any client action from server. So you need add  javascript function (eg. name it auth) into all your pages which will do some action after some time.
and call it using <body onLoad="setTimeout(function,15*60*1000)">
15 can be replaced by your sessioin timeout.

in function auth you can perform some checks and open new window.
0
 
LVL 35

Expert Comment

by:TimYates
ID: 11900216
Ooooh!  Nice :-)

Of course, if you change your timeout in web.xml, you will need to change all of your jsp's too ;-)
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 19

Expert Comment

by:ramazanyich
ID: 11900248
You can use session.getMaxInactiveInterval() API call to set timeout value dynamically in your HTML output
0
 

Author Comment

by:elmakarge
ID: 11900287
Why do i have to change all jsp files   Cant i pass  session timeout value from  web.xml to javascript by a variable ?  I know that we  reach paramter values in web.xml  from jsp files?
Am i wrong ?
0
 
LVL 35

Expert Comment

by:TimYates
ID: 11900310
> Cant i pass  session timeout value from  web.xml to javascript by a variable ?

ramazanyich just showed you how :-)

<body onLoad="setTimeout( function, <%= session.getMaxInactiveInterval() %> * 60 * 1000 )">
0
 
LVL 19

Expert Comment

by:ramazanyich
ID: 11900342
NOTE: getMaxInactiveInterval() returns timeout in seconds. So you should remove *60. Modified string will look like:
<body onLoad="setTimeout( function, <%= session.getMaxInactiveInterval() %>  * 1000 )">
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
String format issue 13 90
maven webservice projet error 6 80
Looking for some programs to resell or buy source codes 1 75
I get error: useBean: Duplicate bean name: {0} 1 115
OpenVPN is a great open source VPN server that is capable of providing quick and easy VPN access to your network on the cheap.  By default the software is configured to allow open access to your network.  But what if you want to restrict users to on…
Often, people trade privacy and security for convenience. However in today's concrete jungle, this is an extremely foolish decision considering the vast amount of technologies being used against consumer interest. First off, I won't waste any time e…
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.
A company’s greatest vulnerability is their email. CEO fraud, ransomware and spear phishing attacks are the no1 threat to a company’s security. Cybercrime is responsible for the largest loss of money to companies today with losses projected to r…

943 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

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now