2011-09-26 14:51:15 +02:00
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/*
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2012-06-04 22:31:44 +02:00
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* Copyright 2012 The Netty Project
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2011-09-26 14:51:15 +02:00
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*
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2011-12-09 06:18:34 +01:00
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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2011-09-26 14:51:15 +02:00
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*
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2012-06-04 22:31:44 +02:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2011-09-26 14:51:15 +02:00
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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2011-12-09 06:18:34 +01:00
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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2011-09-26 14:51:15 +02:00
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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2011-12-09 04:38:59 +01:00
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package io.netty.handler.codec.http.websocketx;
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2011-09-26 14:51:15 +02:00
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2019-02-04 10:32:25 +01:00
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import static java.util.Objects.requireNonNull;
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2011-12-11 00:47:07 +01:00
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import io.netty.channel.Channel;
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2012-01-19 05:12:45 +01:00
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import io.netty.channel.ChannelFuture;
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2013-03-07 10:57:27 +01:00
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelPipeline;
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2012-12-30 17:40:24 +01:00
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import io.netty.channel.ChannelPromise;
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2015-01-06 06:55:01 +01:00
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import io.netty.channel.SimpleChannelInboundHandler;
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2013-01-16 05:22:50 +01:00
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import io.netty.handler.codec.http.FullHttpRequest;
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2013-03-07 10:57:27 +01:00
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import io.netty.handler.codec.http.FullHttpResponse;
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2013-09-09 11:55:25 +02:00
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import io.netty.handler.codec.http.HttpContentCompressor;
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2013-02-08 19:54:05 +01:00
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import io.netty.handler.codec.http.HttpHeaders;
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2013-03-07 10:57:27 +01:00
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import io.netty.handler.codec.http.HttpObjectAggregator;
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2015-01-06 06:55:01 +01:00
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import io.netty.handler.codec.http.HttpRequest;
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2013-03-07 10:57:27 +01:00
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import io.netty.handler.codec.http.HttpRequestDecoder;
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import io.netty.handler.codec.http.HttpResponseEncoder;
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import io.netty.handler.codec.http.HttpServerCodec;
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2015-01-06 06:55:01 +01:00
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import io.netty.util.ReferenceCountUtil;
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2013-04-24 02:32:53 +02:00
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import io.netty.util.internal.EmptyArrays;
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2016-06-09 13:29:59 +02:00
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import io.netty.util.internal.ThrowableUtil;
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2013-03-07 10:57:27 +01:00
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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2011-09-26 14:51:15 +02:00
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2015-01-06 06:55:01 +01:00
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import java.nio.channels.ClosedChannelException;
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2012-06-11 15:54:28 +02:00
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import java.util.Collections;
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2012-05-31 02:13:00 +02:00
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import java.util.LinkedHashSet;
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import java.util.Set;
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2011-09-26 14:51:15 +02:00
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/**
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* Base class for server side web socket opening and closing handshakes
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*/
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public abstract class WebSocketServerHandshaker {
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2013-03-07 10:57:27 +01:00
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protected static final InternalLogger logger = InternalLoggerFactory.getInstance(WebSocketServerHandshaker.class);
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2011-09-26 14:51:15 +02:00
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2013-01-17 07:06:46 +01:00
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private final String uri;
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2011-12-15 12:25:40 +01:00
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2012-01-19 05:12:45 +01:00
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private final String[] subprotocols;
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2011-12-15 12:25:40 +01:00
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2012-01-19 05:12:45 +01:00
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private final WebSocketVersion version;
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2011-12-15 12:25:40 +01:00
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2012-05-31 02:21:51 +02:00
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private final int maxFramePayloadLength;
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2012-05-31 02:13:00 +02:00
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2012-05-31 04:09:23 +02:00
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private String selectedSubprotocol;
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2012-05-12 13:05:15 +02:00
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2013-05-17 21:57:47 +02:00
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/**
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* Use this as wildcard to support all requested sub-protocols
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*/
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2013-05-17 22:09:11 +02:00
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public static final String SUB_PROTOCOL_WILDCARD = "*";
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2013-05-17 21:57:47 +02:00
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2011-12-15 12:25:40 +01:00
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/**
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* Constructor specifying the destination web socket location
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2012-02-21 03:06:26 +01:00
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*
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2012-01-19 05:12:45 +01:00
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* @param version
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* the protocol version
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2013-01-17 07:06:46 +01:00
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* @param uri
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2011-12-15 12:25:40 +01:00
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* URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be
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* sent to this URL.
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2012-01-19 05:12:45 +01:00
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* @param subprotocols
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2011-12-15 12:25:40 +01:00
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* CSV of supported protocols. Null if sub protocols not supported.
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2012-05-31 02:13:00 +02:00
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* @param maxFramePayloadLength
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* Maximum length of a frame's payload
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2011-12-15 12:25:40 +01:00
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*/
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2012-01-19 05:12:45 +01:00
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protected WebSocketServerHandshaker(
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2013-01-17 07:06:46 +01:00
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WebSocketVersion version, String uri, String subprotocols,
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2012-05-31 02:21:51 +02:00
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int maxFramePayloadLength) {
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2012-01-19 05:12:45 +01:00
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this.version = version;
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2013-01-17 07:06:46 +01:00
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this.uri = uri;
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2012-01-19 05:12:45 +01:00
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if (subprotocols != null) {
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2016-08-01 11:17:05 +02:00
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String[] subprotocolArray = subprotocols.split(",");
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2012-01-19 05:12:45 +01:00
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for (int i = 0; i < subprotocolArray.length; i++) {
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subprotocolArray[i] = subprotocolArray[i].trim();
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2011-12-15 12:25:40 +01:00
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}
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2012-01-19 05:12:45 +01:00
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this.subprotocols = subprotocolArray;
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} else {
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2013-04-24 02:32:53 +02:00
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this.subprotocols = EmptyArrays.EMPTY_STRINGS;
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2011-12-15 12:25:40 +01:00
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}
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2012-05-31 02:13:00 +02:00
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this.maxFramePayloadLength = maxFramePayloadLength;
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2011-12-15 12:25:40 +01:00
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}
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/**
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* Returns the URL of the web socket
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*/
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2013-01-17 07:06:46 +01:00
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public String uri() {
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return uri;
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2011-12-15 12:25:40 +01:00
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}
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/**
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* Returns the CSV of supported sub protocols
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*/
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2013-01-17 07:06:46 +01:00
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public Set<String> subprotocols() {
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2019-01-22 16:07:26 +01:00
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Set<String> ret = new LinkedHashSet<>();
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2012-06-11 15:54:28 +02:00
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Collections.addAll(ret, subprotocols);
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2012-01-19 05:12:45 +01:00
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return ret;
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2011-12-15 12:25:40 +01:00
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}
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/**
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* Returns the version of the specification being supported
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*/
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2013-01-17 07:06:46 +01:00
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public WebSocketVersion version() {
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2011-12-15 12:25:40 +01:00
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return version;
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}
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2012-05-31 02:13:00 +02:00
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/**
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2012-06-29 07:03:41 +02:00
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* Gets the maximum length for any frame's payload.
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*
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* @return The maximum length for a frame's payload
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2012-05-31 02:13:00 +02:00
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*/
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2013-01-17 07:06:46 +01:00
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public int maxFramePayloadLength() {
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2012-05-31 02:13:00 +02:00
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return maxFramePayloadLength;
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}
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2011-12-15 12:25:40 +01:00
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/**
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2013-07-03 06:41:12 +02:00
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* Performs the opening handshake. When call this method you <strong>MUST NOT</strong> retain the
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* {@link FullHttpRequest} which is passed in.
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2012-02-21 03:06:26 +01:00
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*
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2011-12-15 12:25:40 +01:00
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* @param channel
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2013-07-03 06:41:12 +02:00
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* Channel
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2011-12-15 12:25:40 +01:00
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* @param req
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2013-07-03 06:41:12 +02:00
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* HTTP Request
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* @return future
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* The {@link ChannelFuture} which is notified once the opening handshake completes
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2011-12-15 12:25:40 +01:00
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*/
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2013-01-16 05:22:50 +01:00
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public ChannelFuture handshake(Channel channel, FullHttpRequest req) {
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2013-02-08 19:54:05 +01:00
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return handshake(channel, req, null, channel.newPromise());
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2012-12-14 11:42:58 +01:00
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}
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/**
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* Performs the opening handshake
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*
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2013-07-03 06:41:12 +02:00
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* When call this method you <strong>MUST NOT</strong> retain the {@link FullHttpRequest} which is passed in.
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*
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2012-12-14 11:42:58 +01:00
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* @param channel
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* Channel
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* @param req
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* HTTP Request
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2013-02-08 19:54:05 +01:00
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* @param responseHeaders
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* Extra headers to add to the handshake response or {@code null} if no extra headers should be added
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2012-12-30 17:40:24 +01:00
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* @param promise
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* the {@link ChannelPromise} to be notified when the opening handshake is done
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2013-07-03 06:41:12 +02:00
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* @return future
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* the {@link ChannelFuture} which is notified when the opening handshake is done
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2012-12-14 11:42:58 +01:00
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*/
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2013-03-07 10:57:27 +01:00
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public final ChannelFuture handshake(Channel channel, FullHttpRequest req,
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HttpHeaders responseHeaders, final ChannelPromise promise) {
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2012-12-14 11:42:58 +01:00
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2013-03-07 10:57:27 +01:00
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if (logger.isDebugEnabled()) {
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2014-02-28 22:38:54 +01:00
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logger.debug("{} WebSocket version {} server handshake", channel, version());
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2013-03-07 10:57:27 +01:00
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}
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FullHttpResponse response = newHandshakeResponse(req, responseHeaders);
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2013-10-18 18:22:20 +02:00
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ChannelPipeline p = channel.pipeline();
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if (p.get(HttpObjectAggregator.class) != null) {
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p.remove(HttpObjectAggregator.class);
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}
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if (p.get(HttpContentCompressor.class) != null) {
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p.remove(HttpContentCompressor.class);
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}
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ChannelHandlerContext ctx = p.context(HttpRequestDecoder.class);
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final String encoderName;
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if (ctx == null) {
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// this means the user use a HttpServerCodec
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ctx = p.context(HttpServerCodec.class);
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if (ctx == null) {
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promise.setFailure(
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new IllegalStateException("No HttpDecoder and no HttpServerCodec in the pipeline"));
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return promise;
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}
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p.addBefore(ctx.name(), "wsdecoder", newWebsocketDecoder());
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p.addBefore(ctx.name(), "wsencoder", newWebSocketEncoder());
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encoderName = ctx.name();
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} else {
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p.replace(ctx.name(), "wsdecoder", newWebsocketDecoder());
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encoderName = p.context(HttpResponseEncoder.class).name();
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2013-10-19 20:53:57 +02:00
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p.addBefore(encoderName, "wsencoder", newWebSocketEncoder());
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2013-10-18 18:22:20 +02:00
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}
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2019-01-29 14:06:05 +01:00
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channel.writeAndFlush(response).addListener((ChannelFutureListener) future -> {
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if (future.isSuccess()) {
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ChannelPipeline p1 = future.channel().pipeline();
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p1.remove(encoderName);
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promise.setSuccess();
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} else {
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promise.setFailure(future.cause());
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2013-03-07 10:57:27 +01:00
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}
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});
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return promise;
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}
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2015-01-06 06:55:01 +01:00
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/**
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* Performs the opening handshake. When call this method you <strong>MUST NOT</strong> retain the
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* {@link FullHttpRequest} which is passed in.
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*
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* @param channel
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* Channel
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* @param req
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* HTTP Request
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* @return future
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* The {@link ChannelFuture} which is notified once the opening handshake completes
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*/
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public ChannelFuture handshake(Channel channel, HttpRequest req) {
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return handshake(channel, req, null, channel.newPromise());
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}
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/**
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* Performs the opening handshake
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*
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* When call this method you <strong>MUST NOT</strong> retain the {@link HttpRequest} which is passed in.
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*
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* @param channel
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* Channel
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* @param req
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* HTTP Request
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* @param responseHeaders
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* Extra headers to add to the handshake response or {@code null} if no extra headers should be added
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* @param promise
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* the {@link ChannelPromise} to be notified when the opening handshake is done
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* @return future
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* the {@link ChannelFuture} which is notified when the opening handshake is done
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*/
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public final ChannelFuture handshake(final Channel channel, HttpRequest req,
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final HttpHeaders responseHeaders, final ChannelPromise promise) {
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if (req instanceof FullHttpRequest) {
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return handshake(channel, (FullHttpRequest) req, responseHeaders, promise);
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}
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if (logger.isDebugEnabled()) {
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logger.debug("{} WebSocket version {} server handshake", channel, version());
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}
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ChannelPipeline p = channel.pipeline();
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ChannelHandlerContext ctx = p.context(HttpRequestDecoder.class);
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if (ctx == null) {
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// this means the user use a HttpServerCodec
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ctx = p.context(HttpServerCodec.class);
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if (ctx == null) {
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promise.setFailure(
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new IllegalStateException("No HttpDecoder and no HttpServerCodec in the pipeline"));
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return promise;
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}
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}
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// Add aggregator and ensure we feed the HttpRequest so it is aggregated. A limit o 8192 should be more then
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// enough for the websockets handshake payload.
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//
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// TODO: Make handshake work without HttpObjectAggregator at all.
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String aggregatorName = "httpAggregator";
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p.addAfter(ctx.name(), aggregatorName, new HttpObjectAggregator(8192));
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p.addAfter(aggregatorName, "handshaker", new SimpleChannelInboundHandler<FullHttpRequest>() {
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@Override
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protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest msg) throws Exception {
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// Remove ourself and do the actual handshake
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ctx.pipeline().remove(this);
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handshake(channel, msg, responseHeaders, promise);
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
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// Remove ourself and fail the handshake promise.
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ctx.pipeline().remove(this);
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promise.tryFailure(cause);
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ctx.fireExceptionCaught(cause);
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}
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@Override
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public void channelInactive(ChannelHandlerContext ctx) throws Exception {
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// Fail promise if Channel was closed
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2019-05-17 22:23:02 +02:00
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if (!promise.isDone()) {
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promise.tryFailure(new ClosedChannelException());
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}
|
2015-01-06 06:55:01 +01:00
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ctx.fireChannelInactive();
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}
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});
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try {
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ctx.fireChannelRead(ReferenceCountUtil.retain(req));
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} catch (Throwable cause) {
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promise.setFailure(cause);
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}
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return promise;
|
|
|
|
}
|
|
|
|
|
2013-03-07 10:57:27 +01:00
|
|
|
/**
|
|
|
|
* Returns a new {@link FullHttpResponse) which will be used for as response to the handshake request.
|
|
|
|
*/
|
|
|
|
protected abstract FullHttpResponse newHandshakeResponse(FullHttpRequest req,
|
|
|
|
HttpHeaders responseHeaders);
|
2012-12-14 11:42:58 +01:00
|
|
|
/**
|
|
|
|
* Performs the closing handshake
|
|
|
|
*
|
|
|
|
* @param channel
|
|
|
|
* Channel
|
|
|
|
* @param frame
|
|
|
|
* Closing Frame that was received
|
|
|
|
*/
|
|
|
|
public ChannelFuture close(Channel channel, CloseWebSocketFrame frame) {
|
2019-02-04 10:32:25 +01:00
|
|
|
requireNonNull(channel, "channel");
|
2012-12-30 17:40:24 +01:00
|
|
|
return close(channel, frame, channel.newPromise());
|
2012-12-14 11:42:58 +01:00
|
|
|
}
|
2011-12-15 12:25:40 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Performs the closing handshake
|
2012-02-21 03:06:26 +01:00
|
|
|
*
|
2011-12-15 12:25:40 +01:00
|
|
|
* @param channel
|
|
|
|
* Channel
|
|
|
|
* @param frame
|
|
|
|
* Closing Frame that was received
|
2012-12-30 17:40:24 +01:00
|
|
|
* @param promise
|
|
|
|
* the {@link ChannelPromise} to be notified when the closing handshake is done
|
2011-12-15 12:25:40 +01:00
|
|
|
*/
|
2013-03-07 10:57:27 +01:00
|
|
|
public ChannelFuture close(Channel channel, CloseWebSocketFrame frame, ChannelPromise promise) {
|
2019-02-04 10:32:25 +01:00
|
|
|
requireNonNull(channel, "channel");
|
2013-07-10 13:00:42 +02:00
|
|
|
return channel.writeAndFlush(frame, promise).addListener(ChannelFutureListener.CLOSE);
|
2013-03-07 10:57:27 +01:00
|
|
|
}
|
2011-12-15 12:25:40 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Selects the first matching supported sub protocol
|
2012-02-21 03:06:26 +01:00
|
|
|
*
|
2012-01-19 05:12:45 +01:00
|
|
|
* @param requestedSubprotocols
|
2011-12-15 12:25:40 +01:00
|
|
|
* CSV of protocols to be supported. e.g. "chat, superchat"
|
|
|
|
* @return First matching supported sub protocol. Null if not found.
|
|
|
|
*/
|
2012-01-19 05:12:45 +01:00
|
|
|
protected String selectSubprotocol(String requestedSubprotocols) {
|
|
|
|
if (requestedSubprotocols == null || subprotocols.length == 0) {
|
2011-12-15 12:25:40 +01:00
|
|
|
return null;
|
|
|
|
}
|
|
|
|
|
2016-08-01 11:17:05 +02:00
|
|
|
String[] requestedSubprotocolArray = requestedSubprotocols.split(",");
|
2012-05-12 13:05:15 +02:00
|
|
|
for (String p: requestedSubprotocolArray) {
|
2012-01-19 05:12:45 +01:00
|
|
|
String requestedSubprotocol = p.trim();
|
2011-12-15 12:25:40 +01:00
|
|
|
|
2012-01-19 05:12:45 +01:00
|
|
|
for (String supportedSubprotocol: subprotocols) {
|
2013-05-17 21:57:47 +02:00
|
|
|
if (SUB_PROTOCOL_WILDCARD.equals(supportedSubprotocol)
|
|
|
|
|| requestedSubprotocol.equals(supportedSubprotocol)) {
|
2013-05-17 22:00:55 +02:00
|
|
|
selectedSubprotocol = requestedSubprotocol;
|
2012-01-19 05:12:45 +01:00
|
|
|
return requestedSubprotocol;
|
2011-12-15 12:25:40 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// No match found
|
|
|
|
return null;
|
|
|
|
}
|
2012-05-12 13:05:15 +02:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns the selected subprotocol. Null if no subprotocol has been selected.
|
|
|
|
* <p>
|
|
|
|
* This is only available AFTER <tt>handshake()</tt> has been called.
|
|
|
|
* </p>
|
|
|
|
*/
|
2013-01-17 07:06:46 +01:00
|
|
|
public String selectedSubprotocol() {
|
2012-05-12 13:05:15 +02:00
|
|
|
return selectedSubprotocol;
|
|
|
|
}
|
|
|
|
|
2013-03-07 10:57:27 +01:00
|
|
|
/**
|
|
|
|
* Returns the decoder to use after handshake is complete.
|
|
|
|
*/
|
2013-07-04 06:41:22 +02:00
|
|
|
protected abstract WebSocketFrameDecoder newWebsocketDecoder();
|
2013-03-07 10:57:27 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Returns the encoder to use after the handshake is complete.
|
|
|
|
*/
|
2013-07-04 06:41:22 +02:00
|
|
|
protected abstract WebSocketFrameEncoder newWebSocketEncoder();
|
2013-03-07 10:57:27 +01:00
|
|
|
|
2011-09-26 14:51:15 +02:00
|
|
|
}
|