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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.vfs2.provider.http4;
18  
19  import java.io.IOException;
20  
21  import org.apache.commons.vfs2.FileContent;
22  import org.apache.commons.vfs2.FileContentInfo;
23  import org.apache.commons.vfs2.FileContentInfoFactory;
24  import org.apache.commons.vfs2.FileSystemException;
25  import org.apache.commons.vfs2.impl.DefaultFileContentInfo;
26  import org.apache.commons.vfs2.util.FileObjectUtils;
27  import org.apache.http.Header;
28  import org.apache.http.HttpResponse;
29  import org.apache.http.entity.ContentType;
30  import org.apache.http.protocol.HTTP;
31  
32  /**
33   * Creates <code>FileContentInfoFactory</code> instances for http4 provider.
34   */
35  public class Http4FileContentInfoFactory implements FileContentInfoFactory {
36  
37      @SuppressWarnings("unchecked")
38      @Override
39      public FileContentInfo create(final FileContent fileContent) throws FileSystemException {
40          String contentMimeType = null;
41          String contentCharset = null;
42  
43          try (final Http4FileObject<Http4FileSystem> http4File = (Http4FileObject<Http4FileSystem>) FileObjectUtils
44                  .getAbstractFileObject(fileContent.getFile())) {
45              final HttpResponse lastHeadResponse = http4File.getLastHeadResponse();
46  
47              final Header header = lastHeadResponse.getFirstHeader(HTTP.CONTENT_TYPE);
48  
49              if (header != null) {
50                  final ContentType contentType = ContentType.parse(header.getValue());
51                  contentMimeType = contentType.getMimeType();
52  
53                  if (contentType.getCharset() != null) {
54                      contentCharset = contentType.getCharset().name();
55                  }
56              }
57  
58              return new DefaultFileContentInfo(contentMimeType, contentCharset);
59          } catch (final IOException e) {
60              throw new FileSystemException(e);
61          }
62      }
63  }