title: redo the original request after redirection getRequestDispatcher
body: <p>Hy, 
  I have a code who intercept all request(GET &amp; POST), and eventually redirect to another page, with a form.
  I want that when the user post the form, the initial intercepted request is executed</p>
  
  <p>My actual code:</p>
  
  <pre><code>public void doFilter(ServletRequest originalRequest, ServletResponse res, FilterChain chain){
    originalRequest.getRequestDispatcher("/message").forward(request, res);
  }
  </code></pre>
  
  <p>...</p>
  
  <pre><code>@RequestMapping("/message", method=GET)
  public void showMessageForm(...){
  ...
  }
  @RequestMapping("/message", method=POST)
  public void messageOk(ServletResponse res, ModelAndView mav){
  //redirect to the originalRequest.
    ????
  }
  </code></pre>
  
  <p>The originalRequest can be both GET or POST. If it's a post, I want the content of the form to be transmit too.</p>
  
  <p>Thank you !</p>