----- Original Message -----
From: "Jon Belinfante" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; "Vincent Massol"
<[EMAIL PROTECTED]>
Sent: Tuesday, July 03, 2001 11:12 AM
Subject: Help :: Problem testing Servlet methods that forward to JSPs
> I have a Servlet method that as follows that is meant to do no more then
forward
> to a test JSP page called WibbleWobble
>
> --------------------------------------------------------------------------
---------------------------------------
>
> protected void doPost(
> HttpServletRequest request,
> HttpServletResponse response)
> throws ServletException, java.io.IOException
> {
> System.out.println ("Starting : " +new Date());
> try
> {
>
> String forwardURL = ("/WibbleWobble.jsp");
> RequestDispatcher dispatcher =
request.getRequestDispatcher(
> forwardURL );
> dispatcher.forward(request, response );
>
Ok, here is the story ... :)
1/ If you look at the Tomcat implementation (for Tomcat 3.x and before
only - It is fixed for later version as they had to fix this to support
Servlet 2.3 Filters), you'll see that the forward() and include() methods do
a cast of the request object to their own internal object. As the Request
wrapper does not implement this internal object, it fails.
2/ The solution I have found for this was to wrap the Servlet Context. But
in order to wrap the servlet context I also had to wrap the Config object.
So that config.getServletContext() would return the wrapped context and then
config.getServletContext().getRequestDispatcher() would return the wrapped
dispatcher. Thus when you would call forward() or include() on that wrapped
dispatcher it would actually pass the *original* request to the real
dispatcher foward() or include() method !
3/ Apparently I have forgotten that there is another way to get a request
dispatcher ! Through the request, like request.getDispatcher() ! This is a
bug which has *not* been corrected. I'll correct it asap. In the meantime,
you can use the following, which will work (as evidenced in the Cactus suite
of tests) :
String forwardURL = ("/WibbleWobble.jsp");
RequestDispatcher dispatcher =
getConfig().getServletContext().getRequestDispatcher(forwardURL);
dispatcher.forward(request, response );
Note that you will need to have an init in your test method so that
getConfig() returns the wrapped config object (as you were already doing) :
SecurityServlet servlet = new SecurityServlet();
servlet.init(config); <-- needed
servlet.doPost( request, response );
Thanks to both of you for this bug discovery and sorry Jari, I have probably
skipped your mail that already mentionned that problem (or maybe I simply
did not understand the issue at that time) ... I'll correct it quickly ...
-Vincent
