103928aee4356845252ac6b662d5c72c29903813eJake Slack// 203928aee4356845252ac6b662d5c72c29903813eJake Slack// ======================================================================== 303928aee4356845252ac6b662d5c72c29903813eJake Slack// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. 403928aee4356845252ac6b662d5c72c29903813eJake Slack// ------------------------------------------------------------------------ 503928aee4356845252ac6b662d5c72c29903813eJake Slack// All rights reserved. This program and the accompanying materials 603928aee4356845252ac6b662d5c72c29903813eJake Slack// are made available under the terms of the Eclipse Public License v1.0 703928aee4356845252ac6b662d5c72c29903813eJake Slack// and Apache License v2.0 which accompanies this distribution. 803928aee4356845252ac6b662d5c72c29903813eJake Slack// 903928aee4356845252ac6b662d5c72c29903813eJake Slack// The Eclipse Public License is available at 1003928aee4356845252ac6b662d5c72c29903813eJake Slack// http://www.eclipse.org/legal/epl-v10.html 1103928aee4356845252ac6b662d5c72c29903813eJake Slack// 1203928aee4356845252ac6b662d5c72c29903813eJake Slack// The Apache License v2.0 is available at 1303928aee4356845252ac6b662d5c72c29903813eJake Slack// http://www.opensource.org/licenses/apache2.0.php 1403928aee4356845252ac6b662d5c72c29903813eJake Slack// 1503928aee4356845252ac6b662d5c72c29903813eJake Slack// You may elect to redistribute this code under either of these licenses. 1603928aee4356845252ac6b662d5c72c29903813eJake Slack// ======================================================================== 1703928aee4356845252ac6b662d5c72c29903813eJake Slack// 1803928aee4356845252ac6b662d5c72c29903813eJake Slack 1903928aee4356845252ac6b662d5c72c29903813eJake Slackpackage org.eclipse.jetty.servlets; 2003928aee4356845252ac6b662d5c72c29903813eJake Slack 2103928aee4356845252ac6b662d5c72c29903813eJake Slackimport java.io.IOException; 2203928aee4356845252ac6b662d5c72c29903813eJake Slack 2303928aee4356845252ac6b662d5c72c29903813eJake Slackimport javax.servlet.RequestDispatcher; 2403928aee4356845252ac6b662d5c72c29903813eJake Slackimport javax.servlet.ServletContext; 2503928aee4356845252ac6b662d5c72c29903813eJake Slackimport javax.servlet.ServletException; 2603928aee4356845252ac6b662d5c72c29903813eJake Slackimport javax.servlet.http.HttpServlet; 2703928aee4356845252ac6b662d5c72c29903813eJake Slackimport javax.servlet.http.HttpServletRequest; 2803928aee4356845252ac6b662d5c72c29903813eJake Slackimport javax.servlet.http.HttpServletResponse; 2903928aee4356845252ac6b662d5c72c29903813eJake Slack 3003928aee4356845252ac6b662d5c72c29903813eJake Slack/* ------------------------------------------------------------ */ 3103928aee4356845252ac6b662d5c72c29903813eJake Slack/** Concatenation Servlet 3203928aee4356845252ac6b662d5c72c29903813eJake Slack * This servlet may be used to concatenate multiple resources into 3303928aee4356845252ac6b662d5c72c29903813eJake Slack * a single response. It is intended to be used to load multiple 3403928aee4356845252ac6b662d5c72c29903813eJake Slack * javascript or css files, but may be used for any content of the 3503928aee4356845252ac6b662d5c72c29903813eJake Slack * same mime type that can be meaningfully concatenated. 3603928aee4356845252ac6b662d5c72c29903813eJake Slack * <p> 3703928aee4356845252ac6b662d5c72c29903813eJake Slack * The servlet uses {@link RequestDispatcher#include(javax.servlet.ServletRequest, javax.servlet.ServletResponse)} 3803928aee4356845252ac6b662d5c72c29903813eJake Slack * to combine the requested content, so dynamically generated content 3903928aee4356845252ac6b662d5c72c29903813eJake Slack * may be combined (Eg engine.js for DWR). 4003928aee4356845252ac6b662d5c72c29903813eJake Slack * <p> 4103928aee4356845252ac6b662d5c72c29903813eJake Slack * The servlet uses parameter names of the query string as resource names 4203928aee4356845252ac6b662d5c72c29903813eJake Slack * relative to the context root. So these script tags: 4303928aee4356845252ac6b662d5c72c29903813eJake Slack * <pre> 4403928aee4356845252ac6b662d5c72c29903813eJake Slack * <script type="text/javascript" src="../js/behaviour.js"></script> 4503928aee4356845252ac6b662d5c72c29903813eJake Slack * <script type="text/javascript" src="../js/ajax.js&/chat/chat.js"></script> 4603928aee4356845252ac6b662d5c72c29903813eJake Slack * <script type="text/javascript" src="../chat/chat.js"></script> 4703928aee4356845252ac6b662d5c72c29903813eJake Slack * </pre> can be replaced with the single tag (with the ConcatServlet mapped to /concat): 4803928aee4356845252ac6b662d5c72c29903813eJake Slack * <pre> 4903928aee4356845252ac6b662d5c72c29903813eJake Slack * <script type="text/javascript" src="../concat?/js/behaviour.js&/js/ajax.js&/chat/chat.js"></script> 5003928aee4356845252ac6b662d5c72c29903813eJake Slack * </pre> 5103928aee4356845252ac6b662d5c72c29903813eJake Slack * The {@link ServletContext#getMimeType(String)} method is used to determine the 5203928aee4356845252ac6b662d5c72c29903813eJake Slack * mime type of each resource. If the types of all resources do not match, then a 415 5303928aee4356845252ac6b662d5c72c29903813eJake Slack * UNSUPPORTED_MEDIA_TYPE error is returned. 5403928aee4356845252ac6b662d5c72c29903813eJake Slack * <p> 5503928aee4356845252ac6b662d5c72c29903813eJake Slack * If the init parameter "development" is set to "true" then the servlet will run in 5603928aee4356845252ac6b662d5c72c29903813eJake Slack * development mode and the content will be concatenated on every request. Otherwise 5703928aee4356845252ac6b662d5c72c29903813eJake Slack * the init time of the servlet is used as the lastModifiedTime of the combined content 5803928aee4356845252ac6b662d5c72c29903813eJake Slack * and If-Modified-Since requests are handled with 206 NOT Modified responses if 5903928aee4356845252ac6b662d5c72c29903813eJake Slack * appropriate. This means that when not in development mode, the servlet must be 6003928aee4356845252ac6b662d5c72c29903813eJake Slack * restarted before changed content will be served. 6103928aee4356845252ac6b662d5c72c29903813eJake Slack * 6203928aee4356845252ac6b662d5c72c29903813eJake Slack * 6303928aee4356845252ac6b662d5c72c29903813eJake Slack * 6403928aee4356845252ac6b662d5c72c29903813eJake Slack */ 6503928aee4356845252ac6b662d5c72c29903813eJake Slackpublic class ConcatServlet extends HttpServlet 6603928aee4356845252ac6b662d5c72c29903813eJake Slack{ 6703928aee4356845252ac6b662d5c72c29903813eJake Slack boolean _development; 6803928aee4356845252ac6b662d5c72c29903813eJake Slack long _lastModified; 6903928aee4356845252ac6b662d5c72c29903813eJake Slack ServletContext _context; 7003928aee4356845252ac6b662d5c72c29903813eJake Slack 7103928aee4356845252ac6b662d5c72c29903813eJake Slack /* ------------------------------------------------------------ */ 7203928aee4356845252ac6b662d5c72c29903813eJake Slack public void init() throws ServletException 7303928aee4356845252ac6b662d5c72c29903813eJake Slack { 7403928aee4356845252ac6b662d5c72c29903813eJake Slack _lastModified=System.currentTimeMillis(); 7503928aee4356845252ac6b662d5c72c29903813eJake Slack _context=getServletContext(); 7603928aee4356845252ac6b662d5c72c29903813eJake Slack _development="true".equals(getInitParameter("development")); 7703928aee4356845252ac6b662d5c72c29903813eJake Slack } 7803928aee4356845252ac6b662d5c72c29903813eJake Slack 7903928aee4356845252ac6b662d5c72c29903813eJake Slack /* ------------------------------------------------------------ */ 8003928aee4356845252ac6b662d5c72c29903813eJake Slack /* 8103928aee4356845252ac6b662d5c72c29903813eJake Slack * @return The start time of the servlet unless in development mode, in which case -1 is returned. 8203928aee4356845252ac6b662d5c72c29903813eJake Slack */ 8303928aee4356845252ac6b662d5c72c29903813eJake Slack protected long getLastModified(HttpServletRequest req) 8403928aee4356845252ac6b662d5c72c29903813eJake Slack { 8503928aee4356845252ac6b662d5c72c29903813eJake Slack return _development?-1:_lastModified; 8603928aee4356845252ac6b662d5c72c29903813eJake Slack } 8703928aee4356845252ac6b662d5c72c29903813eJake Slack 8803928aee4356845252ac6b662d5c72c29903813eJake Slack /* ------------------------------------------------------------ */ 8903928aee4356845252ac6b662d5c72c29903813eJake Slack protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException 9003928aee4356845252ac6b662d5c72c29903813eJake Slack { 9103928aee4356845252ac6b662d5c72c29903813eJake Slack String q=req.getQueryString(); 9203928aee4356845252ac6b662d5c72c29903813eJake Slack if (q==null) 9303928aee4356845252ac6b662d5c72c29903813eJake Slack { 9403928aee4356845252ac6b662d5c72c29903813eJake Slack resp.sendError(HttpServletResponse.SC_NO_CONTENT); 9503928aee4356845252ac6b662d5c72c29903813eJake Slack return; 9603928aee4356845252ac6b662d5c72c29903813eJake Slack } 9703928aee4356845252ac6b662d5c72c29903813eJake Slack 9803928aee4356845252ac6b662d5c72c29903813eJake Slack String[] parts = q.split("\\&"); 9903928aee4356845252ac6b662d5c72c29903813eJake Slack String type=null; 10003928aee4356845252ac6b662d5c72c29903813eJake Slack for (int i=0;i<parts.length;i++) 10103928aee4356845252ac6b662d5c72c29903813eJake Slack { 10203928aee4356845252ac6b662d5c72c29903813eJake Slack String t = _context.getMimeType(parts[i]); 10303928aee4356845252ac6b662d5c72c29903813eJake Slack if (t!=null) 10403928aee4356845252ac6b662d5c72c29903813eJake Slack { 10503928aee4356845252ac6b662d5c72c29903813eJake Slack if (type==null) 10603928aee4356845252ac6b662d5c72c29903813eJake Slack type=t; 10703928aee4356845252ac6b662d5c72c29903813eJake Slack else if (!type.equals(t)) 10803928aee4356845252ac6b662d5c72c29903813eJake Slack { 10903928aee4356845252ac6b662d5c72c29903813eJake Slack resp.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE); 11003928aee4356845252ac6b662d5c72c29903813eJake Slack return; 11103928aee4356845252ac6b662d5c72c29903813eJake Slack } 11203928aee4356845252ac6b662d5c72c29903813eJake Slack } 11303928aee4356845252ac6b662d5c72c29903813eJake Slack } 11403928aee4356845252ac6b662d5c72c29903813eJake Slack 11503928aee4356845252ac6b662d5c72c29903813eJake Slack if (type!=null) 11603928aee4356845252ac6b662d5c72c29903813eJake Slack resp.setContentType(type); 11703928aee4356845252ac6b662d5c72c29903813eJake Slack 11803928aee4356845252ac6b662d5c72c29903813eJake Slack for (int i=0;i<parts.length;i++) 11903928aee4356845252ac6b662d5c72c29903813eJake Slack { 12003928aee4356845252ac6b662d5c72c29903813eJake Slack RequestDispatcher dispatcher=_context.getRequestDispatcher(parts[i]); 12103928aee4356845252ac6b662d5c72c29903813eJake Slack if (dispatcher!=null) 12203928aee4356845252ac6b662d5c72c29903813eJake Slack dispatcher.include(req,resp); 12303928aee4356845252ac6b662d5c72c29903813eJake Slack } 12403928aee4356845252ac6b662d5c72c29903813eJake Slack } 12503928aee4356845252ac6b662d5c72c29903813eJake Slack} 126