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From Ben Souther <bsout...@fwdco.com>
Subject RE: How to detect expired session vs. no session? (Solved)
Date Fri, 10 Dec 2004 15:19:12 GMT
I believe it's because they were trying to figure out whether they had a
new session because the old one expired or because they just hit the
site for the first time.  In either case the session would be new.



On Fri, 2004-12-10 at 10:11, Phillip Qin wrote:
> I am curious why people spent so much time trying to figure out whether
> request.getSession(...) returns null or not but didn't bother using
> request.getSession().isNew()?
> 
> 
> 
> -----Original Message-----
> From: Steve Kirk [mailto:tomcat-user@web-startup.co.uk] 
> Sent: December 9, 2004 4:36 PM
> To: 'Tomcat Users List'
> Subject: RE: How to detect expired session vs. no session? (Solved)
> 
> 
> > By default:
> > 1. getSession(true)!=null
> > 2. getSession(false)!=null
> > 
> > But if a JSP page contains the tag <%@ page session="false" %>, then: 
> > 1. getSession(true)!=null 2. getSession(false)==null
> 
> In the last of these 4 cases, do you mean that the implicit JSP session
> object returns null, or that request.getSession(false) returns null?  I
> could understand the first behaviour but would be surprised by the second.
> The problem is that it implies that JSPs execute the code in a way that is
> different than if it were included in a servlet, and given that JSPs are
> servlets, this seems puzzling.  Again, perhaps I'm not fully understanding
> either your case, or the details of how sessions work.
> 
> > For my case, sessions will only be created for logged-in
> > users
> 
> what is it about your case that makes this happen?  I would have thought
> that session creation is independent of whether you are authenticating or
> not.  Or is there a way to config TC to not create sessions by default, and
> only create them when the user successfully authenticates?
> 
> 
> 
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> 
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