74f24a5c19
Motivation: Our http2 child channel implementation was not 100 % complete and had a few bugs. Beside this the performance overhead was non-trivial. Modifications: There are a lot of modifications, the most important.... * Http2FrameCodec extends Http2ConnectionHandler and Http2MultiplexCodec extends Http2FrameCodec to reduce performance heads and inter-dependencies on handlers in the pipeline * Correctly handle outbound flow control for child channels * Support unknow frame types in Http2FrameCodec and Http2MultiplexCodec * Use a consistent way how to create Http2ConnectionHandler, Http2FrameCodec and Http2MultiplexCodec (via a builder) * Remove Http2Codec and Http2CodecBuilder as the user should just use Http2MultipleCodec and Http2MultiplexCodecBuilder now * Smart handling of flushes from child channels to reduce overhead * Reduce object allocations * child channels always use the same EventLoop as the parent Channel to reduce overhead and simplify implementation. * Not extend AbstractChannel for the child channel implementation to reduce overhead in terms of performance and memory usage * Remove Http2FrameStream.managedState(...) as the user of the child channel api should just use Channel.attr(...) Result: Http2MultiplexCodec (and so child channels) and Http2FrameCodec are more correct, faster and more feature complete.
79 lines
3.3 KiB
Java
79 lines
3.3 KiB
Java
/*
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* Copyright 2016 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.http2;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import io.netty.handler.codec.http.FullHttpMessage;
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import io.netty.handler.codec.http.HttpHeaders;
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import io.netty.handler.codec.http.HttpScheme;
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import io.netty.util.internal.UnstableApi;
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/**
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* Translates HTTP/1.x object reads into HTTP/2 frames.
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*/
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@UnstableApi
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public class InboundHttpToHttp2Adapter extends ChannelInboundHandlerAdapter {
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private final Http2Connection connection;
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private final Http2FrameListener listener;
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public InboundHttpToHttp2Adapter(Http2Connection connection, Http2FrameListener listener) {
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this.connection = connection;
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this.listener = listener;
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}
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private static int getStreamId(Http2Connection connection, HttpHeaders httpHeaders) {
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return httpHeaders.getInt(HttpConversionUtil.ExtensionHeaderNames.STREAM_ID.text(),
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connection.remote().incrementAndGetNextStreamId());
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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 FullHttpMessage) {
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handle(ctx, connection, listener, (FullHttpMessage) msg);
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} else {
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super.channelRead(ctx, msg);
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}
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}
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static void handle(ChannelHandlerContext ctx, Http2Connection connection,
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Http2FrameListener listener, FullHttpMessage message) throws Http2Exception {
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try {
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int streamId = getStreamId(connection, message.headers());
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Http2Stream stream = connection.stream(streamId);
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if (stream == null) {
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stream = connection.remote().createStream(streamId, false);
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}
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message.headers().set(HttpConversionUtil.ExtensionHeaderNames.SCHEME.text(), HttpScheme.HTTP.name());
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Http2Headers messageHeaders = HttpConversionUtil.toHttp2Headers(message, true);
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boolean hasContent = message.content().isReadable();
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boolean hasTrailers = !message.trailingHeaders().isEmpty();
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listener.onHeadersRead(
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ctx, streamId, messageHeaders, 0, !(hasContent || hasTrailers));
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if (hasContent) {
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listener.onDataRead(ctx, streamId, message.content(), 0, !hasTrailers);
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}
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if (hasTrailers) {
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Http2Headers headers = HttpConversionUtil.toHttp2Headers(message.trailingHeaders(), true);
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listener.onHeadersRead(ctx, streamId, headers, 0, true);
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}
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stream.closeRemoteSide();
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} finally {
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message.release();
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}
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}
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}
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