1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 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.http;
20
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.nio.ByteBuffer;
24 import java.nio.channels.ReadableByteChannel;
25
26 import org.eclipse.jetty.util.BufferUtil;
27 import org.eclipse.jetty.util.resource.Resource;
28
29 /* ------------------------------------------------------------ */
30 /** HttpContent.
31 *
32 *
33 */
34 public interface HttpContent
35 {
36 String getContentType();
37 String getLastModified();
38 ByteBuffer getIndirectBuffer();
39 ByteBuffer getDirectBuffer();
40 String getETag();
41 Resource getResource();
42 long getContentLength();
43 InputStream getInputStream() throws IOException;
44 ReadableByteChannel getReadableByteChannel() throws IOException;
45 void release();
46
47 /* ------------------------------------------------------------ */
48 /* ------------------------------------------------------------ */
49 /* ------------------------------------------------------------ */
50 public class ResourceAsHttpContent implements HttpContent
51 {
52 final Resource _resource;
53 final String _mimeType;
54 final int _maxBuffer;
55 final String _etag;
56
57 /* ------------------------------------------------------------ */
58 public ResourceAsHttpContent(final Resource resource, final String mimeType)
59 {
60 this(resource,mimeType,-1,false);
61 }
62
63 /* ------------------------------------------------------------ */
64 public ResourceAsHttpContent(final Resource resource, final String mimeType, int maxBuffer)
65 {
66 this(resource,mimeType,maxBuffer,false);
67 }
68
69 /* ------------------------------------------------------------ */
70 public ResourceAsHttpContent(final Resource resource, final String mimeType, boolean etag)
71 {
72 this(resource,mimeType,-1,etag);
73 }
74
75 /* ------------------------------------------------------------ */
76 public ResourceAsHttpContent(final Resource resource, final String mimeType, int maxBuffer, boolean etag)
77 {
78 _resource=resource;
79 _mimeType=mimeType;
80 _maxBuffer=maxBuffer;
81 _etag=etag?resource.getWeakETag():null;
82 }
83
84 /* ------------------------------------------------------------ */
85 @Override
86 public String getContentType()
87 {
88 return _mimeType;
89 }
90
91 /* ------------------------------------------------------------ */
92 @Override
93 public String getLastModified()
94 {
95 return null;
96 }
97
98 /* ------------------------------------------------------------ */
99 @Override
100 public ByteBuffer getDirectBuffer()
101 {
102 if (_resource.length()<=0 || _maxBuffer<_resource.length())
103 return null;
104 try
105 {
106 return BufferUtil.toBuffer(_resource,true);
107 }
108 catch(IOException e)
109 {
110 throw new RuntimeException(e);
111 }
112 }
113
114 /* ------------------------------------------------------------ */
115 @Override
116 public String getETag()
117 {
118 return _etag;
119 }
120
121 /* ------------------------------------------------------------ */
122 @Override
123 public ByteBuffer getIndirectBuffer()
124 {
125 if (_resource.length()<=0 || _maxBuffer<_resource.length())
126 return null;
127 try
128 {
129 return BufferUtil.toBuffer(_resource,false);
130 }
131 catch(IOException e)
132 {
133 throw new RuntimeException(e);
134 }
135 }
136
137 /* ------------------------------------------------------------ */
138 @Override
139 public long getContentLength()
140 {
141 return _resource.length();
142 }
143
144 /* ------------------------------------------------------------ */
145 @Override
146 public InputStream getInputStream() throws IOException
147 {
148 return _resource.getInputStream();
149 }
150
151 /* ------------------------------------------------------------ */
152 @Override
153 public ReadableByteChannel getReadableByteChannel() throws IOException
154 {
155 return _resource.getReadableByteChannel();
156 }
157
158 /* ------------------------------------------------------------ */
159 @Override
160 public Resource getResource()
161 {
162 return _resource;
163 }
164
165 /* ------------------------------------------------------------ */
166 @Override
167 public void release()
168 {
169 _resource.close();
170 }
171 }
172 }