Re: servlet forward: things happen twice

["george wang" <george_wang@bellsouth.net>]

I had similar experience before.  I dont remember exactly what happened.
But I think it was caused by some kind of recursive call.  I would check
servlet mapping and debug step by step to see where and how.  -George

=====
----- Original Message -----
From: "Yong Wang" <wymz@yahoo.com>
To: <ajug-members@ajug.org>
Sent: Tuesday, February 11, 2003 11:47 AM
Subject: servlet forward: things happen twice


> Hi, I wonder if anyone could spot the problem here bcz
> I am sure it is something very simple that I
> overlooked:
>
> I have three servlets, A, B and C, where A forwards to
> B or C based on some flags in request parameter. But
> when A forwards to B, somehow both servlet A and B get
> called twice by only a single get request. The
> environment is tomcat 4.1.
>
> Servlet A
> =========
> public void doPost(HttpServletRequest request,
> HttpServletResponse response) throws ServletException
> {
> doPost(request, response);
> }
>
> public void doGet(HttpServletRequest request,
> HttpServletResponse response) throws ServletException
> {
>
> String key = (String) request.getParameter("key");
> String idx = (String) request.getParameter("index");
>
> try
> {
> if (key != null && idx != null) {
> RequestDispatcher rd =
> getServletContext().getRequestDispatcher("B");
> rd.forward(request, response);
> } else {
> RequestDispatcher rd =
> request.getRequestDispatcher("C");
> rd.forward(request, response);
> } catch (Exception e) {
> ;
> }
>
> Servlet B
> =========
>
> public void doPost(HttpServletRequest request,
> HttpServletResponse response) throws ServletException
> {
> doPost(request, response);
> }
>
> public void doGet(HttpServletRequest request,
> HttpServletResponse response) throws ServletException
> {
> String key = (String) request.getParameter("key");
> String idx = (String) request.getParameter("key");
>
> // do some processing and output to response...
> }
>
> Servlet C (actually a JSP)
> ===========
> code omitted.
>
> I would appreciate any insight. pls email me directly
> if you want to see the entire source listing. Thanks!
>
> yong
>
> =====
>
> // My alternate email: yongwang@mindspring.com
>
>
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