001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.vfs2.provider.http; 018 019import java.io.IOException; 020 021import org.apache.commons.httpclient.Header; 022import org.apache.commons.httpclient.HeaderElement; 023import org.apache.commons.httpclient.methods.HeadMethod; 024import org.apache.commons.vfs2.FileContent; 025import org.apache.commons.vfs2.FileContentInfo; 026import org.apache.commons.vfs2.FileContentInfoFactory; 027import org.apache.commons.vfs2.FileSystemException; 028import org.apache.commons.vfs2.impl.DefaultFileContentInfo; 029import org.apache.commons.vfs2.util.FileObjectUtils; 030 031/** 032 * Creates FileContentInfo instances for HTTP. 033 */ 034public class HttpFileContentInfoFactory implements FileContentInfoFactory { 035 @Override 036 public FileContentInfo create(final FileContent fileContent) throws FileSystemException { 037 final HttpFileObject httpFile = (HttpFileObject) FileObjectUtils.getAbstractFileObject(fileContent.getFile()); 038 039 String contentType = null; 040 String contentEncoding = null; 041 042 HeadMethod headMethod; 043 try { 044 headMethod = httpFile.getHeadMethod(); 045 } catch (final IOException e) { 046 throw new FileSystemException(e); 047 } 048 final Header header = headMethod.getResponseHeader("content-type"); 049 if (header != null) { 050 final HeaderElement[] element = header.getElements(); 051 if (element != null && element.length > 0) { 052 contentType = element[0].getName(); 053 } 054 } 055 056 contentEncoding = headMethod.getResponseCharSet(); 057 058 return new DefaultFileContentInfo(contentType, contentEncoding); 059 } 060}