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 io.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-07"
38 * >draft-ietf-hybi-thewebsocketprotocol- 07</a>
39 */
40 V07,
41
42 /**
43 * <a href= "http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10"
44 * >draft-ietf-hybi-thewebsocketprotocol- 10</a>
45 */
46 V08,
47
48 /**
49 * <a href="http://tools.ietf.org/html/rfc6455 ">RFC 6455</a>. This was originally <a href=
50 * "http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17" >draft-ietf-hybi-thewebsocketprotocol-
51 * 17</a>
52 */
53 V13;
54
55 /**
56 * @return Value for HTTP Header 'Sec-WebSocket-Version'
57 */
58 public String toHttpHeaderValue() {
59 if (this == V00) {
60 return "0";
61 }
62 if (this == V07) {
63 return "7";
64 }
65 if (this == V08) {
66 return "8";
67 }
68 if (this == V13) {
69 return "13";
70 }
71 throw new IllegalStateException("Unknown web socket version: " + this);
72 }
73 }