RE: Servlets

[smet@xxxxxxxxxx]

Michael, I have discovered similar but not identical results. Perhaps the
difference is by me using ie 4.0 whereas you are using ie 5.0.  What is
happening I think is a browser issue, as Netscape seems to work fine as
long as I disable document caching in my Preferences for Advanced-> Cache.

But if I use IE (or Netscape which caches a document once per session) then
I get output displayed from my 2nd servlet, but the url in the address
field still shows the first servlet.  I think this is a browser bug for IE.
What's really happening is this:

1. the SignOut servlet is called and it executes
2. res.sendRedirect(SignIn) is returned to IE
3. IE looks in its cache and finds that the http://host/servlet/reg.SignIn
is already there
4. IE does not send out a request to http/WebSphere to serve SignIn,
instead it displays the cached copy
5. IE does not update the URL on the address field to say
http://host/servlet/reg.SignIn
6. Worse, if I hit refresh while http://host/servlet/reg.SignOut is still
there, IE sends a request to the http server only for SignIn!  I discovered
this by placing System.out.println's for SignIn and SignOut.  IE treats the
URL as if it is SignIn even though it displays it to us as SignOut.

     Subject: RE: Servlets
     From: "Gibbons, Michael" <bmis04@xxxxxxxxxxxxxxxxxxxxxx>
     Date: Mon, 11 Sep 2000 14:07:59 -0400




Hi Art,

Thanks for responding. maybe I could be clearer. I have a servlet called
SignOut. It retrieves the session and does an invalidate() and then does
res.sendRedirect("/servlet/reg.SignIn") When I use ie 5.0 this is what
happens. The output from /servlet/reg.SignIn is displayed but the url in the
address field on the browser says /servlet/reg.SignOut even though the page
is the result of the SignIn servlet. Also, at the bottom of the browser
window there is a status bar that is populated as the servlet is executing.
After the results of the SignIn servlet are displayed the status bar
continues to be populated until I hit the stop button on the browser.

Thanks

-----Original Message-----
From: owner-java400-l@midrange.com
[mailto:owner-java400-l@midrange.com]On Behalf Of francess@us.ibm.com
Sent: Monday, September 11, 2000 1:21 PM
To: JAVA400-L@midrange.com
Subject: Re: Servlets



1. It is not clear to me what the motivation is for wanting to clean up.
Are objects being left around, i.e. not being gc'd?  Is the browser not
displaying what's expected from the redirected-to servlet?  Or.....?

2. When I issue a sendRedirect( ), my browser displays the name of the
redircted (called) servlet.  When you say redirect, do you mean
sendRedirect( )?  Or are you using something else, like forward( )?

Art Smet.


"Gibbons, Michael" <bmis04@MARYWOOD1.MARYWOOD.EDU>@midrange.com on
09/08/2000 12:57:15 PM

Please respond to JAVA400-L@midrange.com

Sent by:  owner-java400-l@midrange.com


To:   "'Java-L'" <java400-L@midrange.com>
cc:
Subject:  Servlets



Hello,

I have a servlet that calls an RPG program, then retrieves a session
object,
invalidates() it and does a redirect to another servlet. I wonder if
someone
could help me with 2 things.

1. After the called servlet completes the status bar in ie 5.0 shows as
something is running. I stepped thru it with debug and everything looked
good. Is there some kind of cleanup I should be doing the servlet that
invalidates?

2. After the called servlet completes the URL being displayed is the name
of
the servlet that does the redirect. How come the name of the
redirected(called)  servlet is not in the URL?

THANKS in ADVANCE

Michael P. Gibbons
Manager of Programming & Technical Services
MARYWOOD UNIVERSITY
2300 Adams Ave.
Scranton, PA 18509

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