io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker07 Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2019 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:
*
* https://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.netty.handler.codec.http.websocketx;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.util.CharsetUtil;
import static io.netty.handler.codec.http.HttpVersion.*;
/**
*
* Performs server side opening and closing handshakes for web socket specification version draft-ietf-hybi-thewebsocketprotocol-
* 10
*
*/
public class WebSocketServerHandshaker07 extends WebSocketServerHandshaker {
public static final String WEBSOCKET_07_ACCEPT_GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
/**
* Constructor specifying the destination web socket location
*
* @param webSocketURL
* URL for web socket communications. e.g "ws://myhost.com/mypath".
* Subsequent web socket frames will be sent to this URL.
* @param subprotocols
* CSV of supported protocols
* @param allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
* @param maxFramePayloadLength
* Maximum allowable frame payload length. Setting this value to your application's
* requirement may reduce denial of service attacks using long data frames.
*/
public WebSocketServerHandshaker07(
String webSocketURL, String subprotocols, boolean allowExtensions, int maxFramePayloadLength) {
this(webSocketURL, subprotocols, allowExtensions, maxFramePayloadLength, false);
}
/**
* Constructor specifying the destination web socket location
*
* @param webSocketURL
* URL for web socket communications. e.g "ws://myhost.com/mypath".
* Subsequent web socket frames will be sent to this URL.
* @param subprotocols
* CSV of supported protocols
* @param allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
* @param maxFramePayloadLength
* Maximum allowable frame payload length. Setting this value to your application's
* requirement may reduce denial of service attacks using long data frames.
* @param allowMaskMismatch
* When set to true, frames which are not masked properly according to the standard will still be
* accepted.
*/
public WebSocketServerHandshaker07(
String webSocketURL, String subprotocols, boolean allowExtensions, int maxFramePayloadLength,
boolean allowMaskMismatch) {
this(webSocketURL, subprotocols, WebSocketDecoderConfig.newBuilder()
.allowExtensions(allowExtensions)
.maxFramePayloadLength(maxFramePayloadLength)
.allowMaskMismatch(allowMaskMismatch)
.build());
}
/**
* Constructor specifying the destination web socket location
*
* @param decoderConfig
* Frames decoder configuration.
*/
public WebSocketServerHandshaker07(String webSocketURL, String subprotocols, WebSocketDecoderConfig decoderConfig) {
super(WebSocketVersion.V07, webSocketURL, subprotocols, decoderConfig);
}
/**
*
* Handle the web socket handshake for the web socket specification HyBi version 7.
*
*
*
* Browser request to the server:
*
*
*
* GET /chat HTTP/1.1
* Host: server.example.com
* Upgrade: websocket
* Connection: Upgrade
* Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
* Sec-WebSocket-Origin: http://example.com
* Sec-WebSocket-Protocol: chat, superchat
* Sec-WebSocket-Version: 7
*
*
*
* Server response:
*
*
*
* HTTP/1.1 101 Switching Protocols
* Upgrade: websocket
* Connection: Upgrade
* Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
* Sec-WebSocket-Protocol: chat
*
*/
@Override
protected FullHttpResponse newHandshakeResponse(FullHttpRequest req, HttpHeaders headers) {
CharSequence key = req.headers().get(HttpHeaderNames.SEC_WEBSOCKET_KEY);
if (key == null) {
throw new WebSocketServerHandshakeException("not a WebSocket request: missing key", req);
}
FullHttpResponse res =
new DefaultFullHttpResponse(HTTP_1_1, HttpResponseStatus.SWITCHING_PROTOCOLS,
req.content().alloc().buffer(0));
if (headers != null) {
res.headers().add(headers);
}
String acceptSeed = key + WEBSOCKET_07_ACCEPT_GUID;
byte[] sha1 = WebSocketUtil.sha1(acceptSeed.getBytes(CharsetUtil.US_ASCII));
String accept = WebSocketUtil.base64(sha1);
if (logger.isDebugEnabled()) {
logger.debug("WebSocket version 07 server handshake key: {}, response: {}.", key, accept);
}
res.headers().set(HttpHeaderNames.UPGRADE, HttpHeaderValues.WEBSOCKET)
.set(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE)
.set(HttpHeaderNames.SEC_WEBSOCKET_ACCEPT, accept);
String subprotocols = req.headers().get(HttpHeaderNames.SEC_WEBSOCKET_PROTOCOL);
if (subprotocols != null) {
String selectedSubprotocol = selectSubprotocol(subprotocols);
if (selectedSubprotocol == null) {
if (logger.isDebugEnabled()) {
logger.debug("Requested subprotocol(s) not supported: {}", subprotocols);
}
} else {
res.headers().set(HttpHeaderNames.SEC_WEBSOCKET_PROTOCOL, selectedSubprotocol);
}
}
return res;
}
@Override
protected WebSocketFrameDecoder newWebsocketDecoder() {
return new WebSocket07FrameDecoder(decoderConfig());
}
@Override
protected WebSocketFrameEncoder newWebSocketEncoder() {
return new WebSocket07FrameEncoder(false);
}
}