001/*
002 *  Copyright 2010 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.skineditor.readers;
017
018import java.io.IOException;
019import java.io.InputStream;
020import java.util.Arrays;
021import java.util.Collection;
022import java.util.Map;
023
024import org.apache.avalon.framework.parameters.Parameters;
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.cocoon.environment.Response;
030import org.apache.cocoon.environment.SourceResolver;
031import org.apache.cocoon.reading.ServiceableReader;
032import org.apache.commons.io.IOUtils;
033import org.apache.excalibur.source.Source;
034import org.apache.excalibur.source.impl.FileSource;
035import org.xml.sax.SAXException;
036
037import org.ametys.core.util.ImageHelper;
038import org.ametys.core.util.URIUtils;
039
040/**
041 * Reader for temporary skin resources
042 */
043public class SkinResourceReader extends ServiceableReader
044{
045    /** The source resolver */
046    protected org.apache.excalibur.source.SourceResolver _srcResolver;
047    /** The file source */
048    protected FileSource _file;
049    
050    private boolean _readForDownload;
051    
052    private int _width;
053    private int _height;
054    private int _maxWidth;
055    private int _maxHeight;
056    private Collection<String> _allowedFormats = Arrays.asList(new String[]{"png", "gif", "jpg", "jpeg"});
057    
058    @Override
059    public void service(ServiceManager smanager) throws ServiceException
060    {
061        _srcResolver = (org.apache.excalibur.source.SourceResolver) smanager.lookup(org.apache.excalibur.source.SourceResolver.ROLE);
062    }
063    
064    @Override
065    public void setup(SourceResolver res, Map objModel, String src, Parameters par) throws ProcessingException, SAXException, IOException
066    {
067        super.setup(res, objModel, src, par);
068        
069        String skin = par.getParameter("skin", null);
070        String path = par.getParameter("path", null);
071        
072        assert skin != null || path != null;
073        
074        _readForDownload = par.getParameterAsBoolean("download", false);
075        
076        // parameters for image resizing
077        _width = par.getParameterAsInteger("width", 0);
078        _height = par.getParameterAsInteger("height", 0);
079        _maxWidth = par.getParameterAsInteger("maxWidth", 0);
080        _maxHeight = par.getParameterAsInteger("maxHeight", 0);
081        
082        _file = (FileSource) _getSource(skin, path);
083    }
084    
085    @Override
086    public void generate() throws IOException, SAXException, ProcessingException
087    {
088        try (InputStream is = _file.getInputStream();)
089        {
090            String name = _file.getName();
091            name = name.replaceAll("\\\\", "\\\\\\\\");
092            name = name.replaceAll("\\\"", "\\\\\\\"");
093            
094            Response response = ObjectModelHelper.getResponse(objectModel);
095            
096            if (_readForDownload)
097            {
098                response.setHeader("Content-Disposition", "attachment; filename=\"" + name + "\"");
099            }
100            
101            if (_width > 0 || _height > 0 || _maxHeight > 0 || _maxWidth > 0)
102            {
103                // it's an image, which must be resized
104                int i = name.lastIndexOf('.');
105                String format = i != -1 ? name.substring(i + 1) : "png";
106                format = _allowedFormats.contains(format) ? format : "png";
107                
108                ImageHelper.generateThumbnail(is, out, format, _height, _width, _maxHeight, _maxWidth);
109            }
110            else
111            {
112                response.setHeader("Content-Length", Long.toString(_file.getContentLength()));
113
114                IOUtils.copy(is, out);
115            }
116        }
117        finally 
118        {
119            IOUtils.closeQuietly(out);
120        }
121    }
122    
123    private Source _getSource (String skinName, String path) throws IOException
124    { 
125        String decodedPath = URIUtils.decode(path);
126        decodedPath = decodedPath.startsWith("/")  ? decodedPath : "/" + decodedPath;
127        
128        return _srcResolver.resolveURI("ametys-home://skins/temp/" + skinName + decodedPath);
129    }
130}