code: public void sendData(Object req, Object res)
          throws Exception, IOException
      {
          this.sendData((HttpServletRequest)req, (HttpServletResponse)res);
      }
docs: Process an HTML get or post.
  You must override this method.
  @param req The servlet request.
  @param res The servlet response object.
  @exception ServletException From inherited class.
  @exception IOException From inherited class.