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    }