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//
// ========================================================================
// Copyright (c) 1995-2013 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 com.acme;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletRequestWrapper;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/* ------------------------------------------------------------ */
/** TestFilter.
*
* This filter checks for a none local request, and if the init parameter
* "remote" is not set to true, then all non local requests are forwarded
* to /remote.html
*
*/
public class TestFilter implements Filter
{
private static final Logger LOG = Log.getLogger(TestFilter.class);
private boolean _remote;
private ServletContext _context;
private final Set<String> _allowed = new HashSet<String>();
/* ------------------------------------------------------------ */
/*
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
public void init(FilterConfig filterConfig) throws ServletException
{
_context= filterConfig.getServletContext();
_remote=Boolean.parseBoolean(filterConfig.getInitParameter("remote"));
_allowed.add("/favicon.ico");
_allowed.add("/jetty_banner.gif");
LOG.debug("TestFilter#remote="+_remote);
}
/* ------------------------------------------------------------ */
/*
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException
{
String from = request.getRemoteHost();
String to = request.getServerName();
String path=((HttpServletRequest)request).getServletPath();
if (!"/remote.html".equals(path) && !_remote && !_allowed.contains(path) && (
!from.equals("localhost") && !from.startsWith("127.") && from.indexOf(":1")<0 ||
!to.equals("localhost")&&!to.startsWith("127.0.0.") && to.indexOf(":1")<0))
{
if ("/".equals(path))
_context.getRequestDispatcher("/remote.html").forward(request,response);
else
((HttpServletResponse)response).sendRedirect("/remote.html");
return;
}
Integer old_value=null;
ServletRequest r = request;
while (r instanceof ServletRequestWrapper)
r=((ServletRequestWrapper)r).getRequest();
try
{
old_value=(Integer)request.getAttribute("testFilter");
Integer value=(old_value==null)?new Integer(1):new Integer(old_value.intValue()+1);
request.setAttribute("testFilter", value);
String qString = ((HttpServletRequest)request).getQueryString();
if (qString != null && qString.indexOf("wrap")>=0)
{
request=new HttpServletRequestWrapper((HttpServletRequest)request);
}
_context.setAttribute("request"+r.hashCode(),value);
chain.doFilter(request, response);
}
finally
{
request.setAttribute("testFilter", old_value);
_context.setAttribute("request"+r.hashCode(),old_value);
}
}
/* ------------------------------------------------------------ */
/*
* @see javax.servlet.Filter#destroy()
*/
public void destroy()
{
}
}
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