/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.dispatch;
import javax.servlet.FilterChain;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Does an internal forward of the request.
*/
public class ForwardFilterChain implements FilterChain {
private static final Logger log
= Logger.getLogger(ForwardFilterChain.class.getName());
// servlet
private String _url;
private RequestDispatcher _disp;
/**
* Create the forward filter chain servlet.
*
* @param url the request dispatcher to forward to.
*/
public ForwardFilterChain(String url)
{
_url = url;
}
/**
* Create the forward filter chain servlet.
*
* @param disp the request dispatcher to forward to.
*/
public ForwardFilterChain(RequestDispatcher disp)
{
_disp = disp;
}
/**
* Forwards to the dispatch
*
* @param request the servlet request
* @param response the servlet response
*/
@Override
public void doFilter(ServletRequest request,
ServletResponse response)
throws ServletException, IOException
{
try {
if (_disp != null)
_disp.forward(request, response);
else {
HttpServletRequest req = (HttpServletRequest) request;
RequestDispatcher disp = req.getRequestDispatcher(_url);
disp.forward(request, response);
}
} catch (FileNotFoundException e) {
log.log(Level.FINER, e.toString(), e);
HttpServletResponse res = (HttpServletResponse) response;
res.sendError(404);
}
}
@Override
public String toString()
{
if (_disp != null)
return "ForwardFilterChain[" + _disp + "]";
else
return "ForwardFilterChain[" + _url + "]";
}
}