1 /*
2 * Copyright 2010 Red Hat, Inc.
3 *
4 * Red Hat licenses this file to you under the Apache License, version 2.0
5 * (the "License"); you may not use this file except in compliance with the
6 * License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package org.jboss.netty.handler.codec.rtsp;
17
18 import org.jboss.netty.buffer.ChannelBuffer;
19 import org.jboss.netty.handler.codec.frame.TooLongFrameException;
20 import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
21 import org.jboss.netty.handler.codec.http.HttpMessage;
22 import org.jboss.netty.handler.codec.http.HttpResponse;
23 import org.jboss.netty.handler.codec.http.HttpResponseStatus;
24
25 /**
26 * Decodes {@link ChannelBuffer}s into RTSP responses represented in
27 * {@link HttpResponse}s.
28 * <p>
29 * <h3>Parameters that prevents excessive memory consumption</h3>
30 * <table border="1">
31 * <tr>
32 * <th>Name</th><th>Meaning</th>
33 * </tr>
34 * <tr>
35 * <td>{@code maxInitialLineLength}</td>
36 * <td>The maximum length of the initial line (e.g. {@code "RTSP/1.0 200 OK"})
37 * If the length of the initial line exceeds this value, a
38 * {@link TooLongFrameException} will be raised.</td>
39 * </tr>
40 * <tr>
41 * <td>{@code maxHeaderSize}</td>
42 * <td>The maximum length of all headers. If the sum of the length of each
43 * header exceeds this value, a {@link TooLongFrameException} will be raised.</td>
44 * </tr>
45 * <tr>
46 * <td>{@code maxContentLength}</td>
47 * <td>The maximum length of the content. If the content length exceeds this
48 * value, a {@link TooLongFrameException} will be raised.</td>
49 * </tr>
50 * </table>
51 *
52 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
53 * @author <a href="http://amitbhayani.blogspot.com/">Amit Bhayani</a>
54 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
55 * @version $Rev: 2282 $, $Date: 2010-05-19 16:51:38 +0900 (Wed, 19 May 2010) $
56 */
57 public class RtspResponseDecoder extends RtspMessageDecoder {
58
59 /**
60 * Creates a new instance with the default
61 * {@code maxInitialLineLength (4096}}, {@code maxHeaderSize (8192)}, and
62 * {@code maxContentLength (8192)}.
63 */
64 public RtspResponseDecoder() {
65 super();
66 }
67
68 /**
69 * Creates a new instance with the specified parameters.
70 */
71 public RtspResponseDecoder(int maxInitialLineLength, int maxHeaderSize,
72 int maxContentLength) {
73 super(maxInitialLineLength, maxHeaderSize, maxContentLength);
74 }
75
76 @Override
77 protected HttpMessage createMessage(String[] initialLine) throws Exception {
78 return new DefaultHttpResponse(
79 RtspVersions.valueOf(initialLine[0]),
80 new HttpResponseStatus(Integer.valueOf(initialLine[1]), initialLine[2]));
81 }
82
83 @Override
84 protected boolean isDecodingRequest() {
85 return false;
86 }
87 }