001/*
002 *  Copyright 2017 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.workspaces.dav;
017
018import java.io.IOException;
019import java.time.ZoneId;
020import java.time.format.DateTimeFormatter;
021import java.util.TimeZone;
022
023import org.apache.cocoon.ProcessingException;
024import org.apache.cocoon.environment.ObjectModelHelper;
025import org.apache.cocoon.environment.Request;
026import org.apache.cocoon.environment.Response;
027import org.apache.cocoon.reading.AbstractReader;
028import org.xml.sax.SAXException;
029
030import org.ametys.core.util.DateUtils;
031import org.ametys.plugins.explorer.resources.Resource;
032
033/**
034 * Reader for WebDAV HEAD method
035 */
036public class WebdavHeadReader extends AbstractReader
037{
038    public void generate() throws IOException, SAXException, ProcessingException
039    {
040        Request request = ObjectModelHelper.getRequest(objectModel);
041        Resource resource = (Resource) request.getAttribute("resource"); 
042        
043        Response response = ObjectModelHelper.getResponse(objectModel);
044
045        response.setHeader("Content-Length", String.valueOf(resource.getLength()));
046        response.setHeader("Content-Type", resource.getMimeType());
047
048        String lastModified = DateTimeFormatter.RFC_1123_DATE_TIME.withZone(TimeZone.getTimeZone("GMT").toZoneId()).format(DateUtils.asZonedDateTime(resource.getLastModified(), ZoneId.systemDefault()));
049        response.setHeader("Last-Modified", lastModified);
050        response.setHeader("ETag", resource.getLastModified().toString());
051    }
052}