Invert Your Mind

I’ve been working on getting the JCatapult security framework to leverage Struts actions rather than a bunch of configuration and additional custom code. In order to pull all of this off, I had to modify the HttpServletRequest in order to make it seem like the requested URI was different than the original request URI. I used a HttpServletRequestWrapper in order to pull this off like this:

final HttpServletRequest httpRequest = (HttpServletRequest) request;

HttpServletRequestWrapper wrapper = new HttpServletRequestWrapper(httpRequest) {
  @Override
  public String getRequestURI() {
    return successfulLoginURI;
  }

  @Override
  public String getServletPath() {
    return successfulLoginURI;
  }

  @Override
  public RequestDispatcher getRequestDispatcher(String uri) {
    final RequestDispatcher rd = httpRequest.getRequestDispatcher(uri);
    return new RequestDispatcher() {
      public void forward(ServletRequest servletRequest, ServletResponse servletResponse)
      throws ServletException, IOException {
        rd.forward(httpRequest, servletResponse);
      }

      public void include(ServletRequest servletRequest, ServletResponse servletResponse)
      throws ServletException, IOException {
        rd.include(httpRequest, servletResponse);
      }
    };
  }
};

As it turns out, I had to do that little tricky part at the end with the RequestDispatcher because Tomcat fails during a forward if the incoming HttpServletRequest is a wrapper.

This entry was posted on Wednesday, January 16th, 2008 at 6:12 pm and is filed under JCatapult, Java. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.