001/* 002 * Copyright 2018 Anyware Services 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.ametys.core.minimize.css; 017 018import java.io.ByteArrayOutputStream; 019import java.io.IOException; 020import java.io.InputStream; 021import java.net.URISyntaxException; 022import java.nio.charset.StandardCharsets; 023import java.util.Map; 024 025import org.apache.avalon.framework.service.ServiceException; 026import org.apache.avalon.framework.service.ServiceManager; 027import org.apache.cocoon.ProcessingException; 028import org.apache.cocoon.environment.ObjectModelHelper; 029import org.apache.commons.io.IOUtils; 030import org.apache.commons.lang3.StringUtils; 031import org.apache.excalibur.source.Source; 032 033import org.ametys.core.minimize.AbstractSourceMapResourceHandler; 034import org.ametys.plugins.core.ui.resources.css.JSASSResourceURIExtensionPoint; 035 036/** 037 * Resource handler for source map files 038 */ 039public class CSSSourceMapResourceHandler extends AbstractSourceMapResourceHandler 040{ 041 /** CSS minimize manager */ 042 protected MinimizeCSSManager _cssMinimizeManager; 043 044 private JSASSResourceURIExtensionPoint _jsassResourceURIExtensionPoint; 045 046 @Override 047 public void service(ServiceManager manager) throws ServiceException 048 { 049 super.service(manager); 050 051 _cssMinimizeManager = (MinimizeCSSManager) manager.lookup(MinimizeCSSManager.ROLE); 052 _jsassResourceURIExtensionPoint = (JSASSResourceURIExtensionPoint) manager.lookup(JSASSResourceURIExtensionPoint.ROLE); 053 } 054 055 @Override 056 protected Source _getAlternateSource(String location, Map objectModel) throws IOException 057 { 058 Source source = null; 059 060 // 1. check if the source map is in cache 061 try 062 { 063 String resolvedLocation = _jsassResourceURIExtensionPoint.resolve(location); 064 source = _sourceMapCache.get(resolvedLocation != null ? resolvedLocation : location); 065 } 066 catch (URISyntaxException e) 067 { 068 getLogger().error("Unable to resolve the uri because the syntax '" + location + "' is not supported ", e); 069 } 070 071 if (source == null) 072 { 073 // 2. generate the source map and store it in cache 074 source = _generateCssSourceMap(objectModel, location); 075 } 076 077 return source; 078 } 079 080 private Source _generateCssSourceMap(Map objectModel, String location) throws IOException 081 { 082 String originalUri = "/" + StringUtils.removeEnd(ObjectModelHelper.getRequest(objectModel).getSitemapURI(), ".map"); 083 084 Source sourceResolved = _resolver.resolveURI("cocoon:" + originalUri); 085 if (sourceResolved != null && sourceResolved.exists()) 086 { 087 try (InputStream inputStream = sourceResolved.getInputStream()) 088 { 089 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 090 IOUtils.copy(inputStream, baos); 091 092 // Stores the source of the sourceMap in the cache 093 String sourceMapKey = _jsassResourceURIExtensionPoint.resolve(location); 094 _cssMinimizeManager.minimizeCss(baos.toString(StandardCharsets.UTF_8.toString()), originalUri, sourceMapKey, sourceResolved.getLastModified()); 095 096 return _sourceMapCache.get(sourceMapKey); 097 } 098 catch (ProcessingException | URISyntaxException e) 099 { 100 getLogger().error("Unable to compile CSS file", e); 101 } 102 } 103 else 104 { 105 _resolver.release(sourceResolved); 106 } 107 108 return null; 109 } 110}