1 /** 2 * This file Copyright (c) 2018 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.ui.dev; 35 36 import info.magnolia.cms.util.ServletUtil; 37 38 import java.io.IOException; 39 import java.lang.reflect.Field; 40 import java.util.Map; 41 42 import javax.servlet.ServletException; 43 import javax.servlet.http.HttpServletRequest; 44 import javax.servlet.http.HttpServletResponse; 45 46 import org.apache.commons.lang3.StringUtils; 47 import org.slf4j.Logger; 48 import org.slf4j.LoggerFactory; 49 50 import com.vaadin.server.VaadinServlet; 51 52 /** 53 * A {@link VaadinServlet} bypassing the internal Scss cache, to help working on Vaadin themes 54 * when provided in JAR files. This servlet should be used only for static resources, 55 * and mapped to <code>/VAADIN/*</code>. 56 */ 57 public class NoScssCacheVaadinServlet extends VaadinServlet { 58 private static final Logger log = LoggerFactory.getLogger(NoScssCacheVaadinServlet.class); 59 private Map<String, Object> scssCache; 60 61 @Override 62 protected void servletInitialized() throws ServletException { 63 super.servletInitialized(); 64 65 // Make self-internal scssCache dirtily accessible 66 try { 67 Field field = VaadinServlet.class.getDeclaredField("scssCache"); 68 field.setAccessible(true); 69 scssCache = (Map<String, Object>) field.get(this); 70 } catch (ReflectiveOperationException e) { 71 log("Unable to initialize reference to inner Scss cache for the Vaadin servlet; caching won't be disabled.", e); 72 } 73 } 74 75 @Override 76 protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 77 String requestURI = ServletUtil.stripPathParameters(request.getRequestURI()); 78 if (StringUtils.endsWith(requestURI, ".css") && scssCache != null) { 79 scssCache.clear(); 80 } 81 82 super.service(request, response); 83 } 84 }