nl.topicus.jdbc.shaded.io.netty.handler.codec.http.websocketx.WebSocketVersion Maven / Gradle / Ivy

/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package nl.topicus.jdbc.shaded.io.netty.handler.codec.http.websocketx;

/**
 * 
 * Versions of the web socket specification.
 * 
 * 
 * A specification is tied to one wire protocol version but a protocol version may have use by more than 1 version of
 * the specification.
 * 
 */
public enum WebSocketVersion {
    UNKNOWN,

    /**
     * draft-ietf-hybi-thewebsocketprotocol- 00.
     */
    V00,

    /**
     * draft-ietf-hybi-thewebsocketprotocol- 07
     */
    V07,

    /**
     * draft-ietf-hybi-thewebsocketprotocol- 10
     */
    V08,

    /**
     * RFC 6455. This was originally draft-ietf-hybi-thewebsocketprotocol-
     * 17
     */
    V13;

    /**
     * @return Value for HTTP Header 'Sec-WebSocket-Version'
     */
    public String toHttpHeaderValue() {
        if (this == V00) {
            return "0";
        }
        if (this == V07) {
            return "7";
        }
        if (this == V08) {
            return "8";
        }
        if (this == V13) {
            return "13";
        }
        throw new IllegalStateException("Unknown web socket version: " + this);
    }
}