io.netty.handler.codec.http.websocketx.WebSocketServerHandshakerFactory 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.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpUtil;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.HttpResponse;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.util.internal.ObjectUtil;
/**
* Auto-detects the version of the Web Socket protocol in use and creates a new proper
* {@link WebSocketServerHandshaker}.
*/
public class WebSocketServerHandshakerFactory {
private final String webSocketURL;
private final String subprotocols;
private final WebSocketDecoderConfig decoderConfig;
/**
* 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. Null if sub protocols not supported.
* @param allowExtensions
* Allow extensions to be used in the reserved bits of the web socket frame
*/
public WebSocketServerHandshakerFactory(
String webSocketURL, String subprotocols, boolean allowExtensions) {
this(webSocketURL, subprotocols, allowExtensions, 65536);
}
/**
* 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. Null if sub protocols not supported.
* @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 WebSocketServerHandshakerFactory(
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. Null if sub protocols not supported.
* @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 WebSocketServerHandshakerFactory(
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 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. Null if sub protocols not supported.
* @param decoderConfig
* Frames decoder options.
*/
public WebSocketServerHandshakerFactory(
String webSocketURL, String subprotocols, WebSocketDecoderConfig decoderConfig) {
this.webSocketURL = webSocketURL;
this.subprotocols = subprotocols;
this.decoderConfig = ObjectUtil.checkNotNull(decoderConfig, "decoderConfig");
}
/**
* Instances a new handshaker
*
* @return A new WebSocketServerHandshaker for the requested web socket version. Null if web
* socket version is not supported.
*/
public WebSocketServerHandshaker newHandshaker(HttpRequest req) {
CharSequence version = req.headers().get(HttpHeaderNames.SEC_WEBSOCKET_VERSION);
if (version != null) {
if (version.equals(WebSocketVersion.V13.toHttpHeaderValue())) {
// Version 13 of the wire protocol - RFC 6455 (version 17 of the draft hybi specification).
return new WebSocketServerHandshaker13(
webSocketURL, subprotocols, decoderConfig);
} else if (version.equals(WebSocketVersion.V08.toHttpHeaderValue())) {
// Version 8 of the wire protocol - version 10 of the draft hybi specification.
return new WebSocketServerHandshaker08(
webSocketURL, subprotocols, decoderConfig);
} else if (version.equals(WebSocketVersion.V07.toHttpHeaderValue())) {
// Version 8 of the wire protocol - version 07 of the draft hybi specification.
return new WebSocketServerHandshaker07(
webSocketURL, subprotocols, decoderConfig);
} else {
return null;
}
} else {
// Assume version 00 where version header was not specified
return new WebSocketServerHandshaker00(webSocketURL, subprotocols, decoderConfig);
}
}
/**
* @deprecated use {@link #sendUnsupportedVersionResponse(Channel)}
*/
@Deprecated
public static void sendUnsupportedWebSocketVersionResponse(Channel channel) {
sendUnsupportedVersionResponse(channel);
}
/**
* Return that we need cannot support the web socket version
*/
public static ChannelFuture sendUnsupportedVersionResponse(Channel channel) {
return sendUnsupportedVersionResponse(channel, channel.newPromise());
}
/**
* Return that we need cannot support the web socket version
*/
public static ChannelFuture sendUnsupportedVersionResponse(Channel channel, ChannelPromise promise) {
HttpResponse res = new DefaultFullHttpResponse(
HttpVersion.HTTP_1_1,
HttpResponseStatus.UPGRADE_REQUIRED, channel.alloc().buffer(0));
res.headers().set(HttpHeaderNames.SEC_WEBSOCKET_VERSION, WebSocketVersion.V13.toHttpHeaderValue());
HttpUtil.setContentLength(res, 0);
return channel.writeAndFlush(res, promise);
}
}