/*

  * FCKeditor - The text editor for Internet - http://www.fckeditor.net

  * Copyright (C) 2004-2010 Frederico Caldeira Knabben

  * 

  * == BEGIN LICENSE ==

  * 

  * Licensed under the terms of any of the following licenses at your

  * choice:

  * 

  *  - GNU General Public License Version 2 or later (the "GPL")

  *    http://www.gnu.org/licenses/gpl.html

  * 

  *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")

  *    http://www.gnu.org/licenses/lgpl.html

  * 

  *  - Mozilla Public License Version 1.1 or later (the "MPL")

  *    http://www.mozilla.org/MPL/MPL-1.1.html

  * 

  * == END LICENSE ==

  */

 package net.fckeditor.connector;

 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 net.fckeditor.requestcycle.ThreadLocalData;

 import net.fckeditor.response.GetResponse;

 import net.fckeditor.response.UploadResponse;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 /**

  * Connector servlet of the File Browser. It accepts requests begins the request

  * cycle, forwards requests to the {@link Dispatcher dispatcher} and ends the

  * request cycle with an appropriate {@link net.fckeditor.response response}.

  * 

  * @version $Id: ConnectorServlet.java 4785 2009-12-21 20:10:28Z mosipov $

  */

 public class ConnectorServlet extends HttpServlet {

         private static final long serialVersionUID = -5742008970929377161L;

         private final Logger logger = LoggerFactory.getLogger(ConnectorServlet.class);

         private transient Dispatcher dispatcher;

         /**

          * Initializes this servlet. It initializes the dispatcher internally.

          * 

          * @throws ServletException

          *             if an exception occurs that interrupts the servlet's normal

          *             operation

          */

         @Override

         public void init() throws ServletException {

                 try {

                         dispatcher = new Dispatcher(getServletContext());

                 } catch (Exception e) {

                         logger.error("Dispatcher could not be initialized", e);

                         throw new ServletException(e);

                 }

         }

         /**

          * Passes a GET request to the dispatcher.

          * 

          * @throws IOException

          *             if an input or output error is detected when the servlet

          *             handles the GET request

          * @throws ServletException

          *             if the request for the GET could not be handled

          */

         @Override

         protected void doGet(final HttpServletRequest request,

                         final HttpServletResponse response) throws ServletException,

                         IOException {

                 request.setCharacterEncoding("UTF-8");

                 response.setCharacterEncoding("UTF-8");

                 response.setContentType("application/xml");

                 response.setHeader("Cache-Control", "no-cache");

                 PrintWriter out = response.getWriter();

                 GetResponse getResponse = null;

                 try {

                         ThreadLocalData.beginRequest(request);

                         getResponse = dispatcher.doGet(request);

                 } catch (Exception e) {

                         throw new ServletException(e);

                 } finally {

                         /*

                          * call this method to prevent detached requests or else the request

                          * will probably never be garbage collected and will fill your

                          * memory

                          */

                         ThreadLocalData.endRequest();

                 }

                 out.print(getResponse);

                 out.flush();

                 out.close();

         }

         /**

          * Passes a POST request to the dispatcher.

          * 

          * @throws IOException

          *             if an input or output error is detected when the servlet

          *             handles the request

          * @throws ServletException

          *             if the request for the POST could not be handled

          */

         @Override

         protected void doPost(final HttpServletRequest request,

                         final HttpServletResponse response) throws ServletException,

                         IOException {

                 request.setCharacterEncoding("UTF-8");

                 response.setCharacterEncoding("UTF-8");

                 response.setContentType("text/html");

                 response.setHeader("Cache-Control", "no-cache");

                 PrintWriter out = response.getWriter();

                 UploadResponse uploadResponse = null;

                 try {

                         ThreadLocalData.beginRequest(request);

                         uploadResponse = dispatcher.doPost(request);

                 } catch (Exception e) {

                         throw new ServletException(e);

                 } finally {

                         /*

                          * call this method to prevent detached requests or else the request

                          * will probably never be garbage collected and will fill your

                          * memory

                          */

                         ThreadLocalData.endRequest();

                 }

                 out.print(uploadResponse);

                 out.flush();

                 out.close();

         }

 }