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19 package com.acme;
20
21 import java.io.IOException;
22 import java.util.HashSet;
23 import java.util.Set;
24
25 import javax.servlet.Filter;
26 import javax.servlet.FilterChain;
27 import javax.servlet.FilterConfig;
28 import javax.servlet.ServletContext;
29 import javax.servlet.ServletException;
30 import javax.servlet.ServletRequest;
31 import javax.servlet.ServletRequestWrapper;
32 import javax.servlet.ServletResponse;
33 import javax.servlet.http.HttpServletRequest;
34 import javax.servlet.http.HttpServletRequestWrapper;
35 import javax.servlet.http.HttpServletResponse;
36
37 import org.eclipse.jetty.util.log.Log;
38 import org.eclipse.jetty.util.log.Logger;
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48 public class TestFilter implements Filter
49 {
50 private static final Logger LOG = Log.getLogger(TestFilter.class);
51
52 private boolean _remote;
53 private ServletContext _context;
54 private final Set<String> _allowed = new HashSet<String>();
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56
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58
59
60 public void init(FilterConfig filterConfig) throws ServletException
61 {
62 _context= filterConfig.getServletContext();
63 _remote=Boolean.parseBoolean(filterConfig.getInitParameter("remote"));
64 _allowed.add("/favicon.ico");
65 _allowed.add("/jetty_banner.gif");
66
67 LOG.debug("TestFilter#remote="+_remote);
68 }
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73
74 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
75 throws IOException, ServletException
76 {
77 String from = request.getRemoteHost();
78 String to = request.getServerName();
79 String path=((HttpServletRequest)request).getServletPath();
80
81 if (!"/remote.html".equals(path) && !_remote && !_allowed.contains(path) && (
82 !from.equals("localhost") && !from.startsWith("127.") && from.indexOf(":1")<0 ||
83 !to.equals("localhost")&&!to.startsWith("127.0.0.") && to.indexOf(":1")<0))
84 {
85 if ("/".equals(path))
86 _context.getRequestDispatcher("/remote.html").forward(request,response);
87 else
88 ((HttpServletResponse)response).sendRedirect("/remote.html");
89 return;
90 }
91
92 Integer old_value=null;
93 ServletRequest r = request;
94 while (r instanceof ServletRequestWrapper)
95 r=((ServletRequestWrapper)r).getRequest();
96
97 try
98 {
99 old_value=(Integer)request.getAttribute("testFilter");
100
101 Integer value=(old_value==null)?new Integer(1):new Integer(old_value.intValue()+1);
102
103 request.setAttribute("testFilter", value);
104
105 String qString = ((HttpServletRequest)request).getQueryString();
106 if (qString != null && qString.indexOf("wrap")>=0)
107 {
108 request=new HttpServletRequestWrapper((HttpServletRequest)request);
109 }
110 _context.setAttribute("request"+r.hashCode(),value);
111
112 chain.doFilter(request, response);
113 }
114 finally
115 {
116 request.setAttribute("testFilter", old_value);
117 _context.setAttribute("request"+r.hashCode(),old_value);
118 }
119 }
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125 public void destroy()
126 {
127 }
128
129 }