107 lines
4.5 KiB
Java
107 lines
4.5 KiB
Java
/*
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* Copyright 2017 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.testsuite.http2;
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import static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandler;
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import io.netty.channel.ChannelInitializer;
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import io.netty.channel.ChannelPipeline;
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import io.netty.channel.SimpleChannelInboundHandler;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.handler.codec.http.HttpMessage;
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import io.netty.handler.codec.http.HttpObjectAggregator;
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import io.netty.handler.codec.http.HttpServerCodec;
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import io.netty.handler.codec.http.HttpServerUpgradeHandler;
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import io.netty.handler.codec.http.HttpServerUpgradeHandler.UpgradeCodecFactory;
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import io.netty.handler.codec.http2.CleartextHttp2ServerUpgradeHandler;
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import io.netty.handler.codec.http2.Http2CodecUtil;
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import io.netty.handler.codec.http2.Http2ServerUpgradeCodec;
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import io.netty.util.AsciiString;
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import io.netty.util.ReferenceCountUtil;
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/**
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* Sets up the Netty pipeline for the example server. Depending on the endpoint config, sets up the
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* pipeline for NPN or cleartext HTTP upgrade to HTTP/2.
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*/
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public class Http2ServerInitializer extends ChannelInitializer<SocketChannel> {
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private static final UpgradeCodecFactory upgradeCodecFactory = protocol -> {
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if (AsciiString.contentEquals(Http2CodecUtil.HTTP_UPGRADE_PROTOCOL_NAME, protocol)) {
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return new Http2ServerUpgradeCodec(new HelloWorldHttp2HandlerBuilder().build());
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} else {
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return null;
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}
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};
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private final int maxHttpContentLength;
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Http2ServerInitializer() {
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this(16 * 1024);
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}
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Http2ServerInitializer(int maxHttpContentLength) {
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checkPositiveOrZero(maxHttpContentLength, "maxHttpContentLength");
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this.maxHttpContentLength = maxHttpContentLength;
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}
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@Override
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public void initChannel(SocketChannel ch) {
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configureClearText(ch);
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}
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/**
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* Configure the pipeline for a cleartext upgrade from HTTP to HTTP/2.0
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*/
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private void configureClearText(SocketChannel ch) {
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final ChannelPipeline p = ch.pipeline();
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final HttpServerCodec sourceCodec = new HttpServerCodec();
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final HttpServerUpgradeHandler upgradeHandler = new HttpServerUpgradeHandler(sourceCodec, upgradeCodecFactory);
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final CleartextHttp2ServerUpgradeHandler cleartextHttp2ServerUpgradeHandler =
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new CleartextHttp2ServerUpgradeHandler(sourceCodec, upgradeHandler,
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new HelloWorldHttp2HandlerBuilder().build());
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p.addLast(cleartextHttp2ServerUpgradeHandler);
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p.addLast(new SimpleChannelInboundHandler<HttpMessage>() {
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@Override
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protected void messageReceived(ChannelHandlerContext ctx, HttpMessage msg) throws Exception {
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// If this handler is hit then no upgrade has been attempted and the client is just talking HTTP.
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System.err.println("Directly talking: " + msg.protocolVersion() + " (no upgrade was attempted)");
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ChannelPipeline pipeline = ctx.pipeline();
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ChannelHandlerContext thisCtx = pipeline.context(this);
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pipeline.addAfter(thisCtx.name(), null, new HelloWorldHttp1Handler("Direct. No Upgrade Attempted."));
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pipeline.replace(this, null, new HttpObjectAggregator(maxHttpContentLength));
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ctx.fireChannelRead(ReferenceCountUtil.retain(msg));
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}
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});
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p.addLast(new UserEventLogger());
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}
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/**
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* Class that logs any User Events triggered on this channel.
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*/
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private static class UserEventLogger implements ChannelInboundHandler {
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@Override
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public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
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System.out.println("User Event Triggered: " + evt);
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ctx.fireUserEventTriggered(evt);
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}
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}
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}
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