| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 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) |
| */ |
| @Override |
| 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"); |
| _allowed.add("/remote.html"); |
| |
| LOG.debug("TestFilter#remote="+_remote); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* |
| * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain) |
| */ |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) |
| throws IOException, ServletException |
| { |
| String from = request.getRemoteAddr(); |
| String to = request.getLocalAddr(); |
| String path=((HttpServletRequest)request).getServletPath(); |
| |
| if (!_remote && !_allowed.contains(path) && !from.equals(to)) |
| { |
| _context.getRequestDispatcher("/remote.html").forward(request,response); |
| 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() |
| */ |
| @Override |
| public void destroy() |
| { |
| } |
| |
| } |