A problem to display a jsp Using MVC approach

Question

Hello everybody
I have got a problem with RequestDispatcher and I would like to get your help.
I excpect the servlet to display the index.jsp page but the server displays a blank page. web.xml's <servlet> and <servlet-mapping> are set correctly at this TestServlet servlet. what could be the problem?
my code looks like this:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class TestServlet extends HttpServlet{
     public void doGet(HttpServletRequest request, HttpServletResponse response)
               throws ServletException, IOException {     
     String url = "/index.jsp";     
     ServletContext context = getServletContext();
     RequestDispatcher dispatcher = context.getRequestDispatcher(url);
               dispatcher.forward(request, response);     }
public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
          //doGet(request,response);
PS: please help me, this step blocks me for several weeks.
thank you.

Answer 1

Hello Thomas, thanks for your answer.
>
Thomas Jung wrote:
> Does this problem happen in IE for all different MIME Types?  I can't recreate your problem as the same functionality works perfectly fine in my installation of IE.
It does happen for Gif-, Jpeg- and Pdf-binaries (other Mime-types I haven't tested yet) and it is IE 7 I am using.
> Do you have any browser plug-ins - like Anti-Virus scanners that might be interupting? 
There are no relevant (as far as I can tell) plug-ins especially no anti-virus scanners loaded.
> >however an export of the binary stream shows the binary is incomplete.
> This could be indicative of the problem or it might be perfectly normal.  What trace tool are you using? 
> It might just be the cause of a multi-part MIME.
The trace-tool is HttpWatch.
I think this correlates with the fact that the tab closes right away (i.e. before the stream has been downloaded completly).
> Can you download attachments in IE from other websites?  There really isn't anything special that SAP is doing in Web Dynpro from a browser side.
I can download/open Pdfs from SDN for example
Unfortunately I still haven't got a clue what happens. The code-snipplet producing the response looks like this
METHOD onactionopen_document .
  DATA: file TYPE zrms_st_file.
  file = wd_this->get_file( ).
  cl_wd_runtime_services=>attach_file_to_response(
      i_filename      = file-filename
      i_content       = file-binary
      i_mime_type     = file-mimetype
      i_in_new_window = abap_true ).
ENDMETHOD.
where the type zrms_st_file has three components: binary (type tr_xstring), filename and mimetype (both dstring). Debugging (breakpoint right before method is called) shows that the mimetype is correct.
Regards,
Sebastian