I'm testing session tracking & cookie on two different browsers (IE 4 and
Netscape 4.5)
I have a scenario like this :
User access the main.html (this html contains a form asking for
username and password).
When the submit button clicked, the form is posted to verifyuser servlet.
If username with that password exists, the verifyuser servlet will
*create* a HttpSession. <I print the SessionId ... say "ABCD">
Then the control is transferred to lobby servlet <I use
resp.sendRedirect(lobbyURL)>
I also anticipate the possibility user directly type the lobbyURL (with
the necessary GET parameters) on his browser....By trapping on the
service(req,resp) method of lobby servlet.
<
HttpSession session = req.getSession(true)
//here i want to check the sessionId
System.out.println(session.getId());
//
if(session.isNew()){
session.invalidate();
resp.sendRedirect(mainhtmlURL);
}else{
super.service(req,resp)
}
>
The problem is (If using IE 4): the sessionId of session that was created
by verifyuser servlet, *is not the* same with the sessionId that I get in
service method of lobby servlet <ABCD =/= WXYZ>
I do not understand this, the tutorial says that every single user have a
*single* session, that can be *shared* among servlets.
I can draw a conclusion that : IE 4 will create a *new*/*separate* request
upon accepting SEND REDIRECT response header <the final effect is
creating a new & different session>
Is that correct ?
I do not experience this problem if I use Netscape 4.5....
It's really annoying, since I rely on that session tracking mechanism for
securing my system <from witched users, ya just like above : they type
directly the servlet URL>
How to correct this problem ?
Is there any other way of invoking another servlet from a servlet ?
(Until now, I only know one : sendRedirect)
Thanks a lot for your helps
-raka-
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