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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.servlets;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
/* ------------------------------------------------------------ */
/** Welcome Filter
* This filter can be used to server an index file for a directory
* when no index file actually exists (thus the web.xml mechanism does
* not work).
*
* This filter will dispatch requests to a directory (URLs ending with /)
* to the welcome URL determined by the "welcome" init parameter. So if
* the filter "welcome" init parameter is set to "index.do" then a request
* to "/some/directory/" will be dispatched to "/some/directory/index.do" and
* will be handled by any servlets mapped to that URL.
*
* Requests to "/some/directory" will be redirected to "/some/directory/".
*/
public class WelcomeFilter implements Filter
{
private String welcome;
public void init(FilterConfig filterConfig)
{
welcome=filterConfig.getInitParameter("welcome");
if (welcome==null)
welcome="index.html";
}
/* ------------------------------------------------------------ */
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws IOException, ServletException
{
String path=((HttpServletRequest)request).getServletPath();
if (welcome!=null && path.endsWith("/"))
request.getRequestDispatcher(path+welcome).forward(request,response);
else
chain.doFilter(request, response);
}
public void destroy() {}
}
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