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15 package com.acme;
16 import java.io.IOException;
17 import java.io.PrintWriter;
18 import java.util.Date;
19 import java.util.Enumeration;
20
21 import javax.servlet.ServletConfig;
22 import javax.servlet.ServletException;
23 import javax.servlet.http.HttpServlet;
24 import javax.servlet.http.HttpServletRequest;
25 import javax.servlet.http.HttpServletResponse;
26 import javax.servlet.http.HttpSession;
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33
34 public class SessionDump extends HttpServlet
35 {
36
37 int redirectCount=0;
38
39 String pageType;
40
41
42 public void init(ServletConfig config)
43 throws ServletException
44 {
45 super.init(config);
46 }
47
48
49 protected void handleForm(HttpServletRequest request,
50 HttpServletResponse response)
51 {
52 HttpSession session = request.getSession(false);
53 String action = request.getParameter("Action");
54 String name = request.getParameter("Name");
55 String value = request.getParameter("Value");
56
57 if (action!=null)
58 {
59 if(action.equals("New Session"))
60 {
61 session = request.getSession(true);
62 session.setAttribute("test","value");
63 }
64 else if (session!=null)
65 {
66 if (action.equals("Invalidate"))
67 session.invalidate();
68 else if (action.equals("Set") && name!=null && name.length()>0)
69 session.setAttribute(name,value);
70 else if (action.equals("Remove"))
71 session.removeAttribute(name);
72 }
73 }
74 }
75
76
77 public void doPost(HttpServletRequest request,
78 HttpServletResponse response)
79 throws ServletException, IOException
80 {
81 handleForm(request,response);
82 String nextUrl = getURI(request)+"?R="+redirectCount++;
83 String encodedUrl=response.encodeRedirectURL(nextUrl);
84 response.sendRedirect(encodedUrl);
85 }
86
87
88 public void doGet(HttpServletRequest request,
89 HttpServletResponse response)
90 throws ServletException, IOException
91 {
92 handleForm(request,response);
93
94 response.setContentType("text/html");
95
96 HttpSession session = request.getSession(getURI(request).indexOf("new")>0);
97 try
98 {
99 if (session!=null)
100 session.isNew();
101 }
102 catch(IllegalStateException e)
103 {
104 session=null;
105 }
106
107 PrintWriter out = response.getWriter();
108 out.println("<h1>Session Dump Servlet:</h1>");
109 out.println("<form action=\""+response.encodeURL(getURI(request))+"\" method=\"post\">");
110
111 if (session==null)
112 {
113 out.println("<H3>No Session</H3>");
114 out.println("<input type=\"submit\" name=\"Action\" value=\"New Session\"/>");
115 }
116 else
117 {
118 try
119 {
120 out.println("<b>ID:</b> "+session.getId()+"<br/>");
121 out.println("<b>New:</b> "+session.isNew()+"<br/>");
122 out.println("<b>Created:</b> "+new Date(session.getCreationTime())+"<br/>");
123 out.println("<b>Last:</b> "+new Date(session.getLastAccessedTime())+"<br/>");
124 out.println("<b>Max Inactive:</b> "+session.getMaxInactiveInterval()+"<br/>");
125 out.println("<b>Context:</b> "+session.getServletContext()+"<br/>");
126
127
128 Enumeration keys=session.getAttributeNames();
129 while(keys.hasMoreElements())
130 {
131 String name=(String)keys.nextElement();
132 String value=""+session.getAttribute(name);
133
134 out.println("<b>"+name+":</b> "+value+"<br/>");
135 }
136
137 out.println("<b>Name:</b><input type=\"text\" name=\"Name\" /><br/>");
138 out.println("<b>Value:</b><input type=\"text\" name=\"Value\" /><br/>");
139
140 out.println("<input type=\"submit\" name=\"Action\" value=\"Set\"/>");
141 out.println("<input type=\"submit\" name=\"Action\" value=\"Remove\"/>");
142 out.println("<input type=\"submit\" name=\"Action\" value=\"Invalidate\"/><br/>");
143
144 out.println("</form><br/>");
145
146 if (request.isRequestedSessionIdFromCookie())
147 out.println("<P>Turn off cookies in your browser to try url encoding<BR>");
148
149 if (request.isRequestedSessionIdFromURL())
150 out.println("<P>Turn on cookies in your browser to try cookie encoding<BR>");
151 out.println("<a href=\""+response.encodeURL(request.getRequestURI()+"?q=0")+"\">Encoded Link</a><BR>");
152
153 }
154 catch (IllegalStateException e)
155 {
156 e.printStackTrace();
157 }
158 }
159
160 }
161
162
163 public String getServletInfo() {
164 return "Session Dump Servlet";
165 }
166
167
168 private String getURI(HttpServletRequest request)
169 {
170 String uri=(String)request.getAttribute("javax.servlet.forward.request_uri");
171 if (uri==null)
172 uri=request.getRequestURI();
173 return uri;
174 }
175
176 }