net.lightbody.bmp.proxy.jetty.servlet.Forward Maven / Gradle / Ivy
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// ========================================================================
// $Id: Forward.java,v 1.9 2005/08/13 00:01:28 gregwilkins Exp $
// Copyright 1996-2004 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================
package net.lightbody.bmp.proxy.jetty.servlet;
import net.lightbody.bmp.proxy.jetty.log.LogFactory;
import org.apache.commons.logging.Log;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
/* ------------------------------------------------------------ */
/** Forward Servlet Request.
* This servlet can be configured with init parameters to use
* a RequestDispatcher to forward requests.
*
* The servlet path of a request is used to look for a initparameter
* of that name. If a parameter is found, it's value is used to get a
* RequestDispatcher.
*
* @version $Id: Forward.java,v 1.9 2005/08/13 00:01:28 gregwilkins Exp $
* @author Greg Wilkins (gregw)
*/
public class Forward extends HttpServlet
{
private static Log log = LogFactory.getLog(Forward.class);
/* ------------------------------------------------------------ */
Map _forwardMap= new HashMap();
/* ------------------------------------------------------------ */
public void init(ServletConfig config)
throws ServletException
{
super.init(config);
Enumeration enm = config.getInitParameterNames();
while (enm.hasMoreElements())
{
String path=(String)enm.nextElement();
String forward=config.getInitParameter(path);
_forwardMap.put(path,forward);
}
}
/* ------------------------------------------------------------ */
public void doPost(HttpServletRequest sreq, HttpServletResponse sres)
throws ServletException, IOException
{
doGet(sreq,sres);
}
/* ------------------------------------------------------------ */
public void doGet(HttpServletRequest sreq, HttpServletResponse sres)
throws ServletException, IOException
{
String path = (String)
sreq.getAttribute("javax.servlet.include.servlet_path");
if (path==null)
path=sreq.getServletPath();
if (path.length()==0)
{
path=(String)sreq.getAttribute("javax.servlet.include.path_info");
if (path==null)
path=sreq.getPathInfo();
}
String forward=(String)_forwardMap.get(path);
if(log.isDebugEnabled())log.debug("Forward "+path+" to "+forward);
if (forward!=null)
{
ServletContext context =
getServletContext().getContext(forward);
String contextPath=sreq.getContextPath();
if (contextPath.length()>1)
forward=forward.substring(contextPath.length());
RequestDispatcher dispatch =
context.getRequestDispatcher(forward);
if (dispatch!=null)
{
dispatch.forward(sreq,sres);
return;
}
}
sres.sendError(404);
}
/* ------------------------------------------------------------ */
public String getServletInfo()
{
return "Forward Servlet";
}
/* ------------------------------------------------------------ */
public synchronized void destroy()
{
log.debug("Destroyed");
}
}