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14 package com.acme;
15
16 import java.io.IOException;
17 import java.util.HashSet;
18 import java.util.Set;
19
20 import javax.servlet.Filter;
21 import javax.servlet.FilterChain;
22 import javax.servlet.FilterConfig;
23 import javax.servlet.ServletContext;
24 import javax.servlet.ServletException;
25 import javax.servlet.ServletRequest;
26 import javax.servlet.ServletRequestWrapper;
27 import javax.servlet.ServletResponse;
28 import javax.servlet.http.HttpServletRequest;
29 import javax.servlet.http.HttpServletRequestWrapper;
30 import javax.servlet.http.HttpServletResponse;
31
32 import org.eclipse.jetty.util.log.Log;
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42 public class TestFilter implements Filter
43 {
44 private boolean _remote;
45 private ServletContext _context;
46 private final Set<String> _allowed = new HashSet<String>();
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52 public void init(FilterConfig filterConfig) throws ServletException
53 {
54 _context= filterConfig.getServletContext();
55 _remote=Boolean.parseBoolean(filterConfig.getInitParameter("remote"));
56 _allowed.add("/favicon.ico");
57 _allowed.add("/jetty_banner.gif");
58
59 Log.debug("TestFilter#remote="+_remote);
60 }
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66 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
67 throws IOException, ServletException
68 {
69 String from = request.getRemoteHost();
70 String to = request.getServerName();
71 String path=((HttpServletRequest)request).getServletPath();
72
73 if (!_remote && !_allowed.contains(path) && (
74 !from.equals("localhost") && !from.startsWith("127.") && from.indexOf(":1")<0 ||
75 !to.equals("localhost")&&!to.startsWith("127.0.0.") && to.indexOf(":1")<0))
76 {
77 if ("/".equals(path))
78 _context.getRequestDispatcher("/remote.html").forward(request,response);
79 else
80 ((HttpServletResponse)response).sendRedirect("/remote.html");
81 return;
82 }
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84 Integer old_value=null;
85 ServletRequest r = request;
86 while (r instanceof ServletRequestWrapper)
87 r=((ServletRequestWrapper)r).getRequest();
88
89 try
90 {
91 old_value=(Integer)request.getAttribute("testFilter");
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93 Integer value=(old_value==null)?new Integer(1):new Integer(old_value.intValue()+1);
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95 request.setAttribute("testFilter", value);
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97 String qString = ((HttpServletRequest)request).getQueryString();
98 if (qString != null && qString.indexOf("wrap")>=0)
99 {
100 request=new HttpServletRequestWrapper((HttpServletRequest)request);
101 }
102 _context.setAttribute("request"+r.hashCode(),value);
103
104 chain.doFilter(request, response);
105 }
106 finally
107 {
108 request.setAttribute("testFilter", old_value);
109 _context.setAttribute("request"+r.hashCode(),old_value);
110 }
111 }
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117 public void destroy()
118 {
119 }
120
121 }