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.sass; 017 018import java.io.ByteArrayOutputStream; 019import java.io.IOException; 020import java.io.InputStream; 021import java.io.Serializable; 022import java.net.URISyntaxException; 023import java.nio.charset.StandardCharsets; 024 025import org.apache.avalon.framework.service.ServiceException; 026import org.apache.avalon.framework.service.ServiceManager; 027import org.apache.cocoon.ProcessingException; 028import org.apache.cocoon.caching.CacheableProcessingComponent; 029import org.apache.cocoon.reading.ServiceableReader; 030import org.apache.commons.io.IOUtils; 031import org.apache.excalibur.source.Source; 032import org.apache.excalibur.source.SourceResolver; 033import org.apache.excalibur.source.SourceValidity; 034import org.apache.excalibur.source.impl.validity.NOPValidity; 035import org.xml.sax.SAXException; 036 037import io.bit3.jsass.CompilationException; 038 039/** 040 * Reader that compile a sass file into css 041 */ 042public class CompileSassReader extends ServiceableReader implements CacheableProcessingComponent 043{ 044 045 private MinimizeSassManager _minimizeSassManager; 046 private SourceResolver _resolver; 047 048 @Override 049 public void service(ServiceManager smanager) throws ServiceException 050 { 051 super.service(smanager); 052 _minimizeSassManager = (MinimizeSassManager) smanager.lookup(MinimizeSassManager.ROLE); 053 _resolver = (SourceResolver) manager.lookup(SourceResolver.ROLE); 054 } 055 056 @SuppressWarnings("deprecation") 057 @Override 058 public void generate() throws IOException, SAXException, ProcessingException 059 { 060 try 061 { 062 Source src = _resolver.resolveURI(this.source); 063 if (!src.exists()) 064 { 065 throw new ProcessingException("Unable to resolve sass file '" + source + "' for compilation, source does not exist"); 066 } 067 068 try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) 069 { 070 try (InputStream is = src.getInputStream()) 071 { 072 IOUtils.copy(is, bos); 073 } 074 075 String compileCss = _minimizeSassManager.compileCss(bos.toString(StandardCharsets.UTF_8.toString()), source, source, false, 0); 076 IOUtils.write(compileCss, out, StandardCharsets.UTF_8); 077 IOUtils.closeQuietly(out); 078 } 079 catch (URISyntaxException | CompilationException e) 080 { 081 throw new ProcessingException("Unable to compile sass file '" + source + "'", e); 082 } 083 084 } 085 catch (IOException e) 086 { 087 throw new ProcessingException("Unable to resolve sass file '" + source + "' for compilation", e); 088 } 089 } 090 091 @Override 092 public Serializable getKey() 093 { 094 return this.source; 095 } 096 097 @Override 098 public SourceValidity getValidity() 099 { 100 return new NOPValidity(); 101 } 102 103 @Override 104 public String getMimeType() 105 { 106 return "text/css"; 107 } 108 109}