// ========================================================================
   // Copyright 2004-2010 Mort Bay Consulting Pty. Ltd.
   // ------------------------------------------------------------------------
   // All rights reserved. This program and the accompanying materials
   // are made available under the terms of the Eclipse Public License v1.0
   // and Apache License v2.0 which accompanies this distribution.
   // The Eclipse Public License is available at
   // http://www.eclipse.org/legal/epl-v10.html
   // The Apache License v2.0 is available at
  // http://www.opensource.org/licenses/apache2.0.php
  // You may elect to redistribute this code under either of these licenses.
  // ========================================================================
  
  package org.eclipse.jetty.server.session;
  
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.util.Random;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  
  import org.eclipse.jetty.client.ContentExchange;
  import org.eclipse.jetty.client.HttpClient;
  import org.eclipse.jetty.http.HttpMethods;
  import org.junit.Test;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  /**
   * AbstractSessionMigrationTest
   */
  public abstract class AbstractSessionMigrationTest
  {
      public abstract AbstractTestServer createServer (int port);
  
      @Test
      public void testSessionMigration() throws Exception
      {
          Random random = new Random(System.nanoTime());
  
          String contextPath = "";
          String servletMapping = "/server";
          int port1 = random.nextInt(50000) + 10000;
          AbstractTestServer server1 = createServer(port1);
          server1.addContext(contextPath).addServlet(TestServlet.class, servletMapping);
          server1.start();
          try
          {
              int port2 = random.nextInt(50000) + 10000;
              AbstractTestServer server2 = createServer(port2);
              server2.addContext(contextPath).addServlet(TestServlet.class, servletMapping);
              server2.start();
              try
              {
                  HttpClient client = new HttpClient();
                  client.setConnectorType(HttpClient.CONNECTOR_SOCKET);
                  client.start();
                  try
                  {
                      // Perform one request to server1 to create a session
                      int value = 1;
                      ContentExchange exchange1 = new ContentExchange(true);
                      exchange1.setMethod(HttpMethods.POST);
                      exchange1.setURL("http://localhost:" + port1 + contextPath + servletMapping + "?action=set&value=" + value);
                      client.send(exchange1);
                      exchange1.waitForDone();
                      assertEquals(HttpServletResponse.SC_OK,exchange1.getResponseStatus());
                      String sessionCookie = exchange1.getResponseFields().getStringField("Set-Cookie");
                      assertTrue(sessionCookie != null);
                      // Mangle the cookie, replacing Path with $Path, etc.
                      sessionCookie = sessionCookie.replaceFirst("(\\W)(P|p)ath=", "$1\\$Path=");
  
                      // Perform a request to server2 using the session cookie from the previous request
                      // This should migrate the session from server1 to server2.
                      ContentExchange exchange2 = new ContentExchange(true);
                      exchange2.setMethod(HttpMethods.GET);
                      exchange2.setURL("http://localhost:" + port2 + contextPath + servletMapping + "?action=get");
                      exchange2.getRequestFields().add("Cookie", sessionCookie);
                      client.send(exchange2);
                      exchange2.waitForDone();
                      assertEquals(HttpServletResponse.SC_OK,exchange2.getResponseStatus());
                      String response = exchange2.getResponseContent();
                      assertEquals(response.trim(),String.valueOf(value));               }
                  finally
                  {
                      client.stop();
                  }
              }
              finally
              {
                  server2.stop();
              }
          }
          finally
          {
             server1.stop();
         }
     }
 
     public static class TestServlet extends HttpServlet
     {
         @Override
         protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
         {
             doPost(request, response);
         }
 
         @Override
         protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
         {
             HttpSession session = request.getSession(false);
             if (session == null) session = request.getSession(true);
 
             String action = request.getParameter("action");
             if ("set".equals(action))
             {
                 int value = Integer.parseInt(request.getParameter("value"));
                 session.setAttribute("value", value);
                 PrintWriter writer = response.getWriter();
                 writer.println(value);
                 writer.flush();
             }
             else if ("get".equals(action))
             {
                 int value = (Integer)session.getAttribute("value");
                 PrintWriter writer = response.getWriter();
                 writer.println(value);
                 writer.flush();
             }
         }
     }
 }