1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the 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.http.websocketx;
17
18 /**
19 * <p>
20 * Versions of the web socket specification.
21 * </p>
22 * <p>
23 * A specification is tied to one wire protocol version but a protocol version may have use by more than 1 version of
24 * the specification.
25 * </p>
26 */
27 public enum WebSocketVersion {
28 UNKNOWN,
29
30 /**
31 * <a href= "http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-00"
32 * >draft-ietf-hybi-thewebsocketprotocol- 00</a>.
33 */
34 V00,
35
36 /**
37 * <a href= "http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10"
38 * >draft-ietf-hybi-thewebsocketprotocol- 10</a>
39 */
40 V08,
41
42 /**
43 * <a href="http://tools.ietf.org/html/rfc6455 ">RFC 6455</a>. This was originally <a href=
44 * "http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17" >draft-ietf-hybi-thewebsocketprotocol-
45 * 17</a>
46 */
47 V13;
48
49 /**
50 * @return Value for HTTP Header 'Sec-WebSocket-Version'
51 */
52 public String toHttpHeaderValue() {
53 if (this == V00) {
54 return "0";
55 } else if (this == V08) {
56 return "8";
57 } else if (this == V13) {
58 return "13";
59 }
60 throw new IllegalStateException("Unknown web socket version: " + this);
61 }
62 }