001/*
002 *  Copyright 2014 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.plugins.flipbook;
017
018import java.io.InputStream;
019
020import org.apache.commons.codec.digest.DigestUtils;
021import org.apache.excalibur.source.Source;
022import org.apache.tika.io.IOUtils;
023
024import org.ametys.core.util.FilenameUtils;
025
026/**
027 * Implementation of a {@link AbstractConvertDocument2ImagesComponent} for an external resource
028 */
029public class ConvertExternalResource2ImagesComponent extends AbstractConvertDocument2ImagesComponent
030{   
031    /** Avalon ROLE. */
032    public static final String ROLE = ConvertExternalResource2ImagesComponent.class.getName();
033    
034    /**
035     * Put the file in cache
036     * @param resource the resource to cache
037     * @param path The resource path
038     * @param cacheDir The cache directory
039     * @param name The resource name
040     * @return The absolute cache path
041     * @throws Exception if an error occurs while caching the file
042     */
043    public String doCache(Source resource, String path, String cacheDir, String name) throws Exception
044    {
045        // Ensure the base folder exists.
046        String cachePath = _getCacheDirectory(path, cacheDir);
047        
048        InputStream is = null;
049        InputStream is2 = null;
050        try
051        {
052            is = resource.getInputStream();
053            String md5sum = DigestUtils.md5Hex(is);
054            
055            is2 = resource.getInputStream();
056            return cache(cachePath, md5sum, is2, name, path, resource.getMimeType());
057        }
058        finally
059        {
060            IOUtils.closeQuietly(is);
061            IOUtils.closeQuietly(is2);
062        }
063    }
064    
065    private String _getCacheDirectory(String path, String cacheDir)
066    {
067        StringBuilder buff = new StringBuilder();
068        
069        // Non-shared resources.
070        buff.append("/");
071        buff.append(cacheDir);
072        buff.append("/resources");
073        buff.append(FilenameUtils.encodePath(path));
074        
075        return buff.toString();
076    }
077}