/*
* @(#)SessionServlet.java 1.21 97/05/22
*
* Copyright (c) 1996, 2004, Oracle. 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);
// set content type and other response header fields first
res.setContentType("text/html");
// then write the data of the response
PrintWriter out = res.getWriter();
out.println(" " + "SessionServlet Output " +
"");
out.println(" SessionServlet Output
");
Integer ival = (Integer) session.getAttribute("sessiontest.counter");
if (ival == null) {
ival = new Integer(1);
} else {
ival = new Integer(ival.intValue() + 1);
}
session.setAttribute("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 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("Servlet Context Data:
");
ServletContext context = session.getServletContext();
for (Enumeration e = context.getAttributeNames(); e.hasMoreElements();) {
out.println("Context Attribute: " +
(String) e.nextElement() + "
");
}
out.println("");
out.close();
}
public String getServletInfo() {
return "A simple servlet";
}
}