// ---------------------------------------------------------------------------
// jWebSocket - Demo how to communicate between Servlets and WebSockets
// Copyright (c) 2010 jWebSocket.org, Alexander Schulze, Innotrade GmbH
// ---------------------------------------------------------------------------
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by the
// Free Software Foundation; either version 3 of the License, or (at your
// option) any later version.
// 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 Lesser General Public License for
// more details.
// You should have received a copy of the GNU Lesser General Public License along
// with this program; if not, see <http://www.gnu.org/licenses/lgpl.html>.
// ---------------------------------------------------------------------------
package org.jwebsocket.appserver;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javolution.util.FastMap;
import org.jwebsocket.server.TokenServer;
import org.jwebsocket.token.Token;
/**
* demonstrates how to communicate between servlets and web sockets.
* @author aschulze
*/
public class ServletBridge extends HttpServlet {
// reference to the token server
private static TokenServer server = null;
/**
* @return the server
*/
public static TokenServer getServer() {
return server;
}
/**
*
* @param aServer
*/
public static void setServer(TokenServer aServer) {
server = aServer;
}
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/plain;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
if (server != null) {
// convert request arguments to token
FastMap<String, String[]> lParms = new FastMap(request.getParameterMap());
Token lToken = new Token();
for (String lParm : lParms.keySet()) {
String[] lValues = lParms.get(lParm);
if (lValues != null && lValues.length > 0) {
lToken.put(lParm, lValues[0]);
}
}
ServletConnector lConn = new ServletConnector(request, response);
server.getPlugInChain().processToken(lConn, lToken);
out.println(lConn.getPlainResponse());
} else {
out.println("ERROR:\nNo WebSocketServer assigned to Servlet!");
}
} finally {
out.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}