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;
022
023import org.ametys.core.util.FilenameUtils;
024
025/**
026 * Implementation of a {@link AbstractConvertDocument2ImagesComponent} for an external resource
027 */
028public class ConvertExternalResource2ImagesComponent extends AbstractConvertDocument2ImagesComponent
029{   
030    /** Avalon ROLE. */
031    public static final String ROLE = ConvertExternalResource2ImagesComponent.class.getName();
032    
033    /**
034     * Put the file in cache
035     * @param resource the resource to cache
036     * @param path The resource path
037     * @param cacheDir The cache directory
038     * @param name The resource name
039     * @return The absolute cache path
040     * @throws Exception if an error occurs while caching the file
041     */
042    public String doCache(Source resource, String path, String cacheDir, String name) throws Exception
043    {
044        // Ensure the base folder exists.
045        String cachePath = _getCacheDirectory(path, cacheDir);
046        
047        try (InputStream is = resource.getInputStream(); InputStream is2 = resource.getInputStream())
048        {
049            String md5sum = DigestUtils.md5Hex(is);
050            return cache(cachePath, md5sum, is2, name, path, resource.getMimeType());
051        }
052    }
053    
054    private String _getCacheDirectory(String path, String cacheDir)
055    {
056        StringBuilder buff = new StringBuilder();
057        
058        // Non-shared resources.
059        buff.append("/");
060        buff.append(cacheDir);
061        buff.append("/resources");
062        buff.append(FilenameUtils.encodePath(path));
063        
064        return buff.toString();
065    }
066}