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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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47
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 @Override
61 public void init(FilterConfig filterConfig) throws ServletException
62 {
63 _context= filterConfig.getServletContext();
64 _remote=Boolean.parseBoolean(filterConfig.getInitParameter("remote"));
65 _allowed.add("/favicon.ico");
66 _allowed.add("/jetty_banner.gif");
67
68 LOG.debug("TestFilter#remote="+_remote);
69 }
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73
74
75 @Override
76 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
77 throws IOException, ServletException
78 {
79 String from = request.getRemoteHost();
80 String to = request.getServerName();
81 String path=((HttpServletRequest)request).getServletPath();
82
83 if (!"/remote.html".equals(path) && !_remote && !_allowed.contains(path) && (
84 !from.equals("localhost") && !from.startsWith("127.") && from.indexOf(":1")<0 ||
85 !to.equals("localhost")&&!to.startsWith("127.0.0.") && to.indexOf(":1")<0))
86 {
87 if ("/".equals(path))
88 _context.getRequestDispatcher("/remote.html").forward(request,response);
89 else
90 ((HttpServletResponse)response).sendRedirect("/remote.html");
91 return;
92 }
93
94 Integer old_value=null;
95 ServletRequest r = request;
96 while (r instanceof ServletRequestWrapper)
97 r=((ServletRequestWrapper)r).getRequest();
98
99 try
100 {
101 old_value=(Integer)request.getAttribute("testFilter");
102
103 Integer value=(old_value==null)?new Integer(1):new Integer(old_value.intValue()+1);
104
105 request.setAttribute("testFilter", value);
106
107 String qString = ((HttpServletRequest)request).getQueryString();
108 if (qString != null && qString.indexOf("wrap")>=0)
109 {
110 request=new HttpServletRequestWrapper((HttpServletRequest)request);
111 }
112 _context.setAttribute("request"+r.hashCode(),value);
113
114 chain.doFilter(request, response);
115 }
116 finally
117 {
118 request.setAttribute("testFilter", old_value);
119 _context.setAttribute("request"+r.hashCode(),old_value);
120 }
121 }
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126
127 @Override
128 public void destroy()
129 {
130 }
131
132 }