001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 /* $Id: SessionExample.java 514091 2007-03-03 06:26:39Z jdillon $ 018 * 019 */ 020 021 import java.io.*; 022 import java.util.*; 023 import javax.servlet.*; 024 import javax.servlet.http.*; 025 026 import util.HTMLFilter; 027 028 /** 029 * Example servlet showing request headers 030 * 031 * @author James Duncan Davidson <duncan@eng.sun.com> 032 */ 033 034 public class SessionExample extends HttpServlet { 035 036 ResourceBundle rb = ResourceBundle.getBundle("LocalStrings"); 037 038 public void doGet(HttpServletRequest request, 039 HttpServletResponse response) 040 throws IOException, ServletException 041 { 042 response.setContentType("text/html"); 043 044 PrintWriter out = response.getWriter(); 045 out.println("<html>"); 046 out.println("<body bgcolor=\"white\">"); 047 out.println("<head>"); 048 049 String title = rb.getString("sessions.title"); 050 out.println("<title>" + title + "</title>"); 051 out.println("</head>"); 052 out.println("<body>"); 053 054 // img stuff not req'd for source code html showing 055 // relative links everywhere! 056 057 // XXX 058 // making these absolute till we work out the 059 // addition of a PathInfo issue 060 061 out.println("<a href=\"../sessions.html\">"); 062 out.println("<img src=\"../images/code.gif\" height=24 " + 063 "width=24 align=right border=0 alt=\"view code\"></a>"); 064 out.println("<a href=\"../index.html\">"); 065 out.println("<img src=\"../images/return.gif\" height=24 " + 066 "width=24 align=right border=0 alt=\"return\"></a>"); 067 068 out.println("<h3>" + title + "</h3>"); 069 070 HttpSession session = request.getSession(true); 071 out.println(rb.getString("sessions.id") + " " + session.getId()); 072 out.println("<br>"); 073 out.println(rb.getString("sessions.created") + " "); 074 out.println(new Date(session.getCreationTime()) + "<br>"); 075 out.println(rb.getString("sessions.lastaccessed") + " "); 076 out.println(new Date(session.getLastAccessedTime())); 077 078 String dataName = request.getParameter("dataname"); 079 String dataValue = request.getParameter("datavalue"); 080 if (dataName != null && dataValue != null) { 081 session.setAttribute(dataName, dataValue); 082 } 083 084 out.println("<P>"); 085 out.println(rb.getString("sessions.data") + "<br>"); 086 Enumeration names = session.getAttributeNames(); 087 while (names.hasMoreElements()) { 088 String name = (String) names.nextElement(); 089 String value = session.getAttribute(name).toString(); 090 out.println(HTMLFilter.filter(name) + " = " 091 + HTMLFilter.filter(value) + "<br>"); 092 } 093 094 out.println("<P>"); 095 out.print("<form action=\""); 096 out.print(response.encodeURL("SessionExample")); 097 out.print("\" "); 098 out.println("method=POST>"); 099 out.println(rb.getString("sessions.dataname")); 100 out.println("<input type=text size=20 name=dataname>"); 101 out.println("<br>"); 102 out.println(rb.getString("sessions.datavalue")); 103 out.println("<input type=text size=20 name=datavalue>"); 104 out.println("<br>"); 105 out.println("<input type=submit>"); 106 out.println("</form>"); 107 108 out.println("<P>GET based form:<br>"); 109 out.print("<form action=\""); 110 out.print(response.encodeURL("SessionExample")); 111 out.print("\" "); 112 out.println("method=GET>"); 113 out.println(rb.getString("sessions.dataname")); 114 out.println("<input type=text size=20 name=dataname>"); 115 out.println("<br>"); 116 out.println(rb.getString("sessions.datavalue")); 117 out.println("<input type=text size=20 name=datavalue>"); 118 out.println("<br>"); 119 out.println("<input type=submit>"); 120 out.println("</form>"); 121 122 out.print("<p><a href=\""); 123 out.print(response.encodeURL("SessionExample?dataname=foo&datavalue=bar")); 124 out.println("\" >URL encoded </a>"); 125 126 out.println("</body>"); 127 out.println("</html>"); 128 129 out.println("</body>"); 130 out.println("</html>"); 131 } 132 133 public void doPost(HttpServletRequest request, 134 HttpServletResponse response) 135 throws IOException, ServletException 136 { 137 doGet(request, response); 138 } 139 140 }