// SessionServlet.java
// edited by Jeff Schmitt
// Towson University
// October, 1998
/*
* @(#)SimpleServlet.java 1.21 97/05/22
*
* Copyright (c) 1996-1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
* CopyrightVersion 1.0
*/
import java.io.*;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* This is a simple example of an HTTP Servlet that uses the HttpSession
* class
*
* Note that in order to gaurentee that session response headers are
* set correctly, the session must be retrieved before any output is
* sent to the client.
*/
public class SessionServlet extends HttpServlet {
public void doGet (HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
//Get the session object
HttpSession session = req.getSession(true);
//Get the output stream
ServletOutputStream out = res.getOutputStream();
res.setContentType("text/html");
out.println(" SessionServlet Output ");
out.println(" SessionServlet Output
");
Integer ival = (Integer) session.getValue("sessiontest.counter");
if (ival==null) {
ival = new Integer(1);
} else {
ival = new Integer(ival.intValue() + 1);
}
session.putValue("sessiontest.counter", ival);
out.println("You have hit this page " + ival + " times.");
out.println("Click here");
out.println(" to ensure that session tracking is working even if cookies aren't supported.
");
out.println(" Note that by default URL rewriting is not enabled due to it's expensive");
out.println(" overhead.");
out.println("
");
out.println("
Request and Session Data:
");
out.println("Session ID in Request: " + req.getRequestedSessionId());
out.println("
Session ID in Request from Cookie: " + req.isRequestedSessionIdFromCookie());
out.println("
Session ID in Request from URL: " + req.isRequestedSessionIdFromUrl());
out.println("
Valid Session ID: " + req.isRequestedSessionIdValid());
out.println("Session Data:
");
out.println("New Session: " + session.isNew());
out.println("
Session ID: " + session.getId());
out.println("
Creation Time: " + session.getCreationTime());
out.println("
Last Accessed Time: " + session.getLastAccessedTime());
out.println("Session Context Data:
");
HttpSessionContext context = session.getSessionContext();
for (Enumeration e = context.getIds(); e.hasMoreElements() ;) {
out.println("Valid Session: " + (String)e.nextElement()+ "
");
}
out.println("");
out.close();
}
public String getServletInfo() {
return "A simple servlet";
}
}