/*

  * $Source: /usr/cvsroot/melati/melati/src/main/java/org/melati/login/Logout.java,v $

  * $Revision: 1.21 $

  *

  * Copyright (C) 2000 William Chesters

  *

  * Part of Melati (http://melati.org), a framework for the rapid

  * development of clean, maintainable web applications.

  *

  * Melati is free software; Permission is granted to copy, distribute

  * and/or modify this software under the terms either:

  *

  * a) the GNU General Public License as published by the Free Software

  *    Foundation; either version 2 of the License, or (at your option)

  *    any later version,

  *

  *    or

  *

  * b) any version of the Melati Software License, as published

  *    at http://melati.org

  *

  * You should have received a copy of the GNU General Public License and

  * the Melati Software License along with this program;

  * if not, write to the Free Software Foundation, Inc.,

  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the

  * GNU General Public License and visit http://melati.org to obtain the

  * Melati Software License.

  *

  * Feel free to contact the Developers of Melati (http://melati.org),

  * if you would like to work out a different arrangement than the options

  * outlined here.  It is our intention to allow Melati to be used by as

  * wide an audience as possible.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * Contact details for copyright holder:

  *

  *     William Chesters <williamc@paneris.org>

  *     http://paneris.org/~williamc

  *     Obrechtstraat 114, 2517VX Den Haag, The Netherlands

  */

 package org.melati.login;

 import javax.servlet.http.HttpSession;

 import org.melati.Melati;

 import org.melati.template.ServletTemplateContext;

 import org.melati.servlet.Form;

 import org.melati.servlet.TemplateServlet;

 /**

  * A servlet which deletes login session cookies to 

  * log a user off from the system.

  *

  */

 public class Logout extends TemplateServlet {

   private static final long serialVersionUID = 1L;

   protected String logoutTemplate(String name) {

     /*

     // Fails to find templates in jars!!

     return "org" + File.separatorChar + 

            "melati" + File.separatorChar +

            "login" + File.separatorChar + 

            name;

     */

     return "org/melati/login/" + name;

     }

   protected String logoutSuccessTemplate() {

     return logoutTemplate("Logout");

   }

   protected String doTemplateRequest(Melati melati, ServletTemplateContext context)

                                                             throws Exception {

     HttpSession session = melati.getSession();

     String returnURL = Form.getFieldNulled(context,"continuationURL");

     if (returnURL == null) {

       context.put("continuationURL", melati.getZoneURL() + "/");

     } else {

       context.put("continuationURL", returnURL);

     }

     session.removeAttribute(HttpSessionAccessHandler.USER);

     return logoutSuccessTemplate();

   }

 }