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From "Martin van den Bemt" <m...@mvdb.com>
Subject RE: response.sendRedirect vs. requestDispatcher.forward
Date Tue, 29 May 2001 22:14:18 GMT
A different hostname creates a new session which could be the problem here..
(so http://www.example.com and http://example.com create a different session
even it's the same server/context/etc..

Mvgr,
Martin

> -----Original Message-----
> From: Alex Fernandez [mailto:afm229@tid.es]
> Sent: Tuesday, May 29, 2001 4:57 PM
> To: tomcat-user@jakarta.apache.org
> Subject: Re: response.sendRedirect vs. requestDispatcher.forward
>
>
> Conceptually, requestDispatcher.forward() is different from
> response.sendRedirect().
>
> In forward(), you are moving inside the same webapp, and as such it
> doesn't even reach the client browser. The session is maintained.
>
> In sendRedirect(), you're instead moving across webapps, and it's the
> browser that redirects to the specified location. In fact, it doesn't
> even need to be another servlet, you may redirect to an ASP or a static
> page. New request and response are created.
>
> It seems strange that the session is not maintained, though, since both
> requests come from the same browser. Perhaps it's a bug?
>
> Un saludo,
>
> Alex.
>
> A Yang wrote:
> >
> > Hi All,
> >
> > Does anyone know offhand whether the Java Servlet
> > specification requires a new HttpSession to be created
> > when using HttpServletResponse.sendRedirect()?
> >
> > In a servlet, I was using:
> >
> >
> getServletConfig().getServletContext().getRequestDispatcher("/Resu
> lt.jsp").forward(req,
> > resp);
> >
> > at the end of a sequence of pages/servlets, but I
> > wanted to replace it with
> >
> > response.sendRedirect("/Result.jsp");
> >
> > instead. The result page prints out the contents of
> > several javabeans which are stored in the session.
> >
> > This worked fine when all I used were
> > requestDispatcher.forward but with
> > response.sendRedirect(), all of my session attributes
> > are gone! In fact, the session id is different after
> > the sendRedirect.
> >
> > I'm pretty sure the session is supposed to survive
> > across any series of GET's and POST's until it is
> > invalidated explicitly (or timed out).
> >
> > Any thoughts? I'm using Tomcat 3.2.1
> >
> > Thanks.
> >
> > _______________________________________________________
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>


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