After more investigation:
- If the servlet URL pattern is "/" then i can forward to JSPs but
not to static content. The Jersey bookstore example [1] is
using just that.
- If the servlet URL pattern is "/*" then i cannot forward to JSPs
nor static content.
Paul.
[1]
http://download.java.net/maven/2/com/sun/jersey/samples/bookstore/
0.9-ea/bookstore-0.9-ea-project.zip
On Sep 2, 2008, at 8:36 AM, Paul Sandoz wrote:
> Hi,
>
> Is the following a bug or expected behavior for Servlet (using GF
> v2 as shipped with NetBeans 6.5 beta).
>
> I have a servlet with the following web.xml:
>
> <web-app version="2.5">
> <servlet>
> <servlet-name>NewServlet</servlet-name>
> <servlet-class>NewServlet</servlet-class>
> </servlet>
> <servlet-mapping>
> <servlet-name>NewServlet</servlet-name>
> <url-pattern>/*</url-pattern>
> </servlet-mapping>
> </web-app>
>
> And the servlet is implemented as follows:
>
> public class NewServlet extends HttpServlet {
>
> ServletContext sc;
>
> @Override
> public final void init(ServletConfig servletConfig) throws
> ServletException {
> sc = servletConfig.getServletContext();
> }
>
> @Override
> public void service(HttpServletRequest req, HttpServletResponse
> resp)
> throws ServletException, IOException {
> RequestDispatcher rd = sc.getRequestDispatcher("/jersey.png");
> rd.forward(req, resp);
> }
> }
>
> There is an image in the Web pages called "jersey.png". So
> basically this servlet forward any requests to the resource "/
> jersey.png". See end of email for NetBeans project containing the
> above.
>
> I am getting:
>
> javax.servlet.ServletException: PWC1232: Exceeded maximum depth
> for nested request dispatches: 20
>
> which is not entirely surprising but is this the expected behavior?
> Namely if there is a specific resource in the web location and the
> RequestDispatcher for that resource returns a non-null value then
> should forward result in the processing of that resource and not a
> recursive invocation of the servlet.
>
> If this is the expected behavior then is the only way for a servlet
> to support the returning of static content to ensure that the path
> to the static content does not match the URL pattern of the servlet
> path?
>
> My questioning behind this is i want to support static content for
> Jersey's MVC approach. But i want to avoid restrictions in the
> naming of the Servlet path as it mandates a particular URL
> structure, and one ends up with a base URL like:
>
> http://localhost:8080/<deployment base>/<jersey base>/
>
> (with static content also exposed directly, which may not be what
> one wants) rather than:
>
> http://localhost:8080/<deployment base>/
>
> It also means that the Jersey servlet might have to write the
> content out itself but then it cannot get access to the meta-data
> like content type, etag, last modified etc. which is all very
> useful stuff for static content and it is not something i want to
> have to re-implement.
>
> Paul.
>
> <WebApplication4.zip>-------------------------------------------------
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