125 lines
4.6 KiB
Java
125 lines
4.6 KiB
Java
/*
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* Copyright 2013 The Netty Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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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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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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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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package io.netty.handler.codec.http.websocketx;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandler;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelPromise;
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import io.netty.handler.codec.http.FullHttpResponse;
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import io.netty.handler.codec.http.websocketx.WebSocketClientProtocolHandler.ClientHandshakeStateEvent;
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import io.netty.util.concurrent.Future;
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import io.netty.util.concurrent.FutureListener;
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import java.util.concurrent.TimeUnit;
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import static io.netty.util.internal.ObjectUtil.*;
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class WebSocketClientProtocolHandshakeHandler implements ChannelHandler {
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private static final long DEFAULT_HANDSHAKE_TIMEOUT_MS = 10000L;
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private final WebSocketClientHandshaker handshaker;
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private final long handshakeTimeoutMillis;
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private ChannelHandlerContext ctx;
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private ChannelPromise handshakePromise;
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WebSocketClientProtocolHandshakeHandler(WebSocketClientHandshaker handshaker) {
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this(handshaker, DEFAULT_HANDSHAKE_TIMEOUT_MS);
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}
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WebSocketClientProtocolHandshakeHandler(WebSocketClientHandshaker handshaker, long handshakeTimeoutMillis) {
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this.handshaker = handshaker;
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this.handshakeTimeoutMillis = checkPositive(handshakeTimeoutMillis, "handshakeTimeoutMillis");
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}
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@Override
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public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
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this.ctx = ctx;
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handshakePromise = ctx.newPromise();
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}
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@Override
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public void channelActive(final ChannelHandlerContext ctx) throws Exception {
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ctx.fireChannelActive();
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handshaker.handshake(ctx.channel()).addListener((ChannelFutureListener) future -> {
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if (!future.isSuccess()) {
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handshakePromise.tryFailure(future.cause());
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ctx.fireExceptionCaught(future.cause());
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} else {
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ctx.fireUserEventTriggered(
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WebSocketClientProtocolHandler.ClientHandshakeStateEvent.HANDSHAKE_ISSUED);
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}
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});
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applyHandshakeTimeout();
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}
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@Override
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public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
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if (!(msg instanceof FullHttpResponse)) {
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ctx.fireChannelRead(msg);
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return;
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}
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FullHttpResponse response = (FullHttpResponse) msg;
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try {
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if (!handshaker.isHandshakeComplete()) {
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handshaker.finishHandshake(ctx.channel(), response);
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handshakePromise.trySuccess();
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ctx.fireUserEventTriggered(
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WebSocketClientProtocolHandler.ClientHandshakeStateEvent.HANDSHAKE_COMPLETE);
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ctx.pipeline().remove(this);
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return;
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}
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throw new IllegalStateException("WebSocketClientHandshaker should have been non finished yet");
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} finally {
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response.release();
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}
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}
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private void applyHandshakeTimeout() {
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final ChannelPromise localHandshakePromise = handshakePromise;
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if (handshakeTimeoutMillis <= 0 || localHandshakePromise.isDone()) {
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return;
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}
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final Future<?> timeoutFuture = ctx.executor().schedule(() -> {
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if (localHandshakePromise.isDone()) {
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return;
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}
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if (localHandshakePromise.tryFailure(new WebSocketHandshakeException("handshake timed out"))) {
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ctx.flush()
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.fireUserEventTriggered(ClientHandshakeStateEvent.HANDSHAKE_TIMEOUT)
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.close();
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}
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}, handshakeTimeoutMillis, TimeUnit.MILLISECONDS);
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// Cancel the handshake timeout when handshake is finished.
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localHandshakePromise.addListener((FutureListener<Void>) f -> timeoutFuture.cancel(false));
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}
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/**
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* This method is visible for testing.
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*
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* @return current handshake future
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*/
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ChannelFuture getHandshakeFuture() {
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return handshakePromise;
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}
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}
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