io.undertow.websockets.core.WebSocketVersion Maven / Gradle / Ivy
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* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 io.undertow.websockets.core;
import io.undertow.util.AttachmentKey;
/**
*
* Enum which list all the different versions of the WebSocket specification (to the current date).
*
*
* A specification is tied to one wire protocol version but a protocol version may have use by more than 1 version of
* the specification.
*
*
* @author Norman Maurer
*/
public enum WebSocketVersion {
/**
* Unknown version of the protocol
*/
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;
/**
* Returns a {@link String} representation of the {@link WebSocketVersion} that can be used in the HTTP Headers.
*/
public String toHttpHeaderValue() {
if (this == V00) {
return "0";
}
if (this == V07) {
return "7";
}
if (this == V08) {
return "8";
}
if (this == V13) {
return "13";
}
// Should never hit here.
throw new IllegalStateException("Unknown WebSocket version: " + this);
}
public static final AttachmentKey ATTACHMENT_KEY = AttachmentKey.create(WebSocketVersion.class);
}