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session help?  RSS feed

 
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Hi guys,

I want to know how can I take user back, when session lifetime is over, to login page so if he want to continue surfing my site he needs to login again.

Regards,
 
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Implement HttpSessionListener class add this in your deployment descriptor(web.xml)and in the implemented class write the code to redirect to the login page when sessionDestroyed event or Session is timed out
 
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Originally posted by Renu Radhika:
Implement HttpSessionListener class add this in your deployment descriptor(web.xml)and in the implemented class write the code to redirect to the login page when sessionDestroyed event or Session is timed out



That wouldn't work as the request and response objects won't be available for a session timout event.

Bashar, what is your exact requirement, should the user be redirected if he/she has been inactive for a certain period or should the user be redirected when he/she makes a request after being inactive for a while?

The second case is straight forward. Whenever a request comes in, get the session from the request object. If no session is returned, you can redirect the user to login page.

For the first case, you can have a javascript timer which will make a request to the server after a certain amount of time (your session time out period) and the server will redirect the user to the login page.
 
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Originally posted by Satish Chilukuri:
The second case is straight forward. Whenever a request comes in, get the session from the request object. If no session is returned, you can redirect the user to login page.



Agreed.

Personal Suggestions:
- Use getSession(false), so it wouldn't create any new one
- Dont just check the session. its better to check some associated attribute with the session such as user, role, etc, if you have anything like that
 
Bashar Ayyash
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thanck you guys, your advices were helpful.... ;-)

one more thing please, I want to build login page that forwared users according to their privilege, for ex. when a user with (User) privilege enters his username and password correctly he will be forwarded to the general page, when user with Mod privielege enters his username and password correctly he will be forwarded to the moderator page, and when user with Admin privilege enters his username and password correctly he will be forwarded to the Administrator page.

Thanx again for your helps.
[ March 08, 2006: Message edited by: Bashar Ayyash ]
 
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As per your last request, if you are using struts, in your action check the role that the user belongs to, then set the forward there. You will obviously have appropriate entries in your config.xml file, to map each forward to the appropriate jsp.

If you are not using struts, then just check in your controller servlet, then forward as appropriate by using the dispatcher object.
 
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More appropriately, a servlet filter is ideal for this purpose.
 
It is sorta covered in the JavaRanch Style Guide.
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