1 //
2 // ========================================================================
3 // Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.server;
20
21 import java.io.IOException;
22
23 import org.eclipse.jetty.http.HttpContent;
24 import org.eclipse.jetty.http.HttpContent.Factory;
25 import org.eclipse.jetty.http.MimeTypes;
26 import org.eclipse.jetty.http.ResourceHttpContent;
27 import org.eclipse.jetty.util.resource.Resource;
28 import org.eclipse.jetty.util.resource.ResourceFactory;
29
30 public class ResourceContentFactory implements Factory
31 {
32 private final ResourceFactory _factory;
33 private final MimeTypes _mimeTypes;
34 private final int _maxBufferSize;
35 private final boolean _gzip;
36
37
38 /* ------------------------------------------------------------ */
39 public ResourceContentFactory(ResourceFactory factory, MimeTypes mimeTypes, int maxBufferSize, boolean gzip)
40 {
41 _factory=factory;
42 _mimeTypes=mimeTypes;
43 _maxBufferSize=maxBufferSize;
44 _gzip=gzip;
45 }
46
47 /* ------------------------------------------------------------ */
48 /** Get a Entry from the cache.
49 * Get either a valid entry object or create a new one if possible.
50 *
51 * @param pathInContext The key into the cache
52 * @return The entry matching <code>pathInContext</code>, or a new entry
53 * if no matching entry was found. If the content exists but is not cachable,
54 * then a {@link ResourceHttpContent} instance is return. If
55 * the resource does not exist, then null is returned.
56 * @throws IOException Problem loading the resource
57 */
58 @Override
59 public HttpContent getContent(String pathInContext)
60 throws IOException
61 {
62
63 // try loading the content from our factory.
64 Resource resource=_factory.getResource(pathInContext);
65 HttpContent loaded = load(pathInContext,resource);
66 return loaded;
67 }
68
69
70 /* ------------------------------------------------------------ */
71 private HttpContent load(String pathInContext, Resource resource)
72 throws IOException
73 {
74 if (resource==null || !resource.exists())
75 return null;
76
77 if (resource.isDirectory())
78 return new ResourceHttpContent(resource,_mimeTypes.getMimeByExtension(resource.toString()),_maxBufferSize);
79
80 // Look for a gzip resource or content
81 String mt = _mimeTypes.getMimeByExtension(pathInContext);
82 if (_gzip)
83 {
84 // Is there a gzip resource?
85 String pathInContextGz=pathInContext+".gz";
86 Resource resourceGz=_factory.getResource(pathInContextGz);
87 if (resourceGz.exists() && resourceGz.lastModified()>=resource.lastModified() && resourceGz.length()<resource.length())
88 return new ResourceHttpContent(resource,mt,_maxBufferSize,
89 new ResourceHttpContent(resourceGz,_mimeTypes.getMimeByExtension(pathInContextGz),_maxBufferSize));
90 }
91
92 return new ResourceHttpContent(resource,mt,_maxBufferSize);
93 }
94
95
96 /* ------------------------------------------------------------ */
97 @Override
98 public String toString()
99 {
100 return "ResourceContentFactory["+_factory+"]@"+hashCode();
101 }
102
103
104 }