Re: servlet forward: things happen twice

[Tim Collins <timmyc8m@yahoo.com>]

could it be....

Servlet A
> > =========
> > 	public void doPost(HttpServletRequest request,
> > HttpServletResponse response) throws
> ServletException
> > 	{
> > 		doPost(request, response);
> > 	}

you are calling doPost(req,res) inside your doPost.

Good Luck,
Tim



--- kingram@bellsouth.net wrote:
> > 				RequestDispatcher rd =
> > getServletContext().getRequestDispatcher("B");
> > 				rd.forward(request, response);
>   ^^^^^^^^^^^^^^^^^^
> > 			} else {
> > 				RequestDispatcher rd =
> > request.getRequestDispatcher("C");
> 
> I am sure someone out there has the time to explain
> this. (busy at work).  But to me, it seems kind of
> ambigious on the part of the API to have a
> getRequestionDispatcher() for
> javax.servlet.ServletContext and
> javax.servlet.http.HttpServletRequest.  Does someone
> have a good example where this can be VERY useful?
> 
> 
> 
> > 
> > From: Yong Wang <wymz@yahoo.com>
> > Date: 2003/02/11 Tue AM 11:47:16 EST
> > To: ajug-members@ajug.org
> > 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
> > 
> > 
> > __________________________________________________
> > Do you Yahoo!?
> > Yahoo! Shopping - Send Flowers for Valentine's Day
> > http://shopping.yahoo.com
> > 
> > 
> 


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