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 664175 2008-06-06 22:43:44Z djencks $
018 *
019 */
020
021 import java.io.IOException;
022 import java.io.PrintWriter;
023 import java.util.Date;
024 import java.util.Enumeration;
025 import java.util.ResourceBundle;
026
027 import javax.servlet.ServletException;
028 import javax.servlet.http.HttpServlet;
029 import javax.servlet.http.HttpServletRequest;
030 import javax.servlet.http.HttpServletResponse;
031 import javax.servlet.http.HttpSession;
032
033 import util.HTMLFilter;
034
035 /**
036 * Example servlet showing request headers
037 *
038 * @author James Duncan Davidson <duncan@eng.sun.com>
039 */
040
041 public class SessionExample extends HttpServlet {
042
043 ResourceBundle rb = ResourceBundle.getBundle("LocalStrings");
044
045 public void doGet(HttpServletRequest request,
046 HttpServletResponse response)
047 throws IOException, ServletException {
048 response.setContentType("text/html");
049
050 PrintWriter out = response.getWriter();
051 out.println("<html>");
052 out.println("<body bgcolor=\"white\">");
053 out.println("<head>");
054
055 String title = rb.getString("sessions.title");
056 out.println("<title>" + title + "</title>");
057 out.println("</head>");
058 out.println("<body>");
059
060 // img stuff not req'd for source code html showing
061 // relative links everywhere!
062
063 // XXX
064 // making these absolute till we work out the
065 // addition of a PathInfo issue
066
067 out.println("<a href=\"../sessions.html\">");
068 out.println("<img src=\"../images/code.gif\" height=24 " +
069 "width=24 align=right border=0 alt=\"view code\"></a>");
070 out.println("<a href=\"../index.html\">");
071 out.println("<img src=\"../images/return.gif\" height=24 " +
072 "width=24 align=right border=0 alt=\"return\"></a>");
073
074 out.println("<h3>" + title + "</h3>");
075
076 HttpSession session = request.getSession(true);
077 out.println(rb.getString("sessions.id") + " " + session.getId());
078 out.println("<br>");
079 out.println(rb.getString("sessions.created") + " ");
080 out.println(new Date(session.getCreationTime()) + "<br>");
081 out.println(rb.getString("sessions.lastaccessed") + " ");
082 out.println(new Date(session.getLastAccessedTime()));
083
084 String dataName = request.getParameter("dataname");
085 String dataValue = request.getParameter("datavalue");
086 if (dataName != null && dataValue != null) {
087 session.setAttribute(dataName, dataValue);
088 }
089
090 out.println("<P>");
091 out.println(rb.getString("sessions.data") + "<br>");
092 Enumeration names = session.getAttributeNames();
093 while (names.hasMoreElements()) {
094 String name = (String) names.nextElement();
095 String value = session.getAttribute(name).toString();
096 out.println(HTMLFilter.filter(name) + " = "
097 + HTMLFilter.filter(value) + "<br>");
098 }
099
100 out.println("<P>");
101 out.print("<form action=\"");
102 out.print(response.encodeURL("SessionExample"));
103 out.print("\" ");
104 out.println("method=POST>");
105 out.println(rb.getString("sessions.dataname"));
106 out.println("<input type=text size=20 name=dataname>");
107 out.println("<br>");
108 out.println(rb.getString("sessions.datavalue"));
109 out.println("<input type=text size=20 name=datavalue>");
110 out.println("<br>");
111 out.println("<input type=submit>");
112 out.println("</form>");
113
114 out.println("<P>GET based form:<br>");
115 out.print("<form action=\"");
116 out.print(response.encodeURL("SessionExample"));
117 out.print("\" ");
118 out.println("method=GET>");
119 out.println(rb.getString("sessions.dataname"));
120 out.println("<input type=text size=20 name=dataname>");
121 out.println("<br>");
122 out.println(rb.getString("sessions.datavalue"));
123 out.println("<input type=text size=20 name=datavalue>");
124 out.println("<br>");
125 out.println("<input type=submit>");
126 out.println("</form>");
127
128 out.print("<p><a href=\"");
129 out.print(response.encodeURL("SessionExample?dataname=foo&datavalue=bar"));
130 out.println("\" >URL encoded </a>");
131
132 out.println("</body>");
133 out.println("</html>");
134
135 out.println("</body>");
136 out.println("</html>");
137 }
138
139 public void doPost(HttpServletRequest request,
140 HttpServletResponse response)
141 throws IOException, ServletException {
142 doGet(request, response);
143 }
144
145 }