io.netty.handler.codec.http2.InboundHttpToHttp2Adapter Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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).

There is a newer version: 35.0.0.Beta1

Show newest version

/*
 * Copyright 2016 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:
 *
 *   http://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.http2;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.codec.http.FullHttpMessage;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpScheme;
import io.netty.util.internal.UnstableApi;

/**
 * Translates HTTP/1.x object reads into HTTP/2 frames.
 */
@UnstableApi
public class InboundHttpToHttp2Adapter extends ChannelInboundHandlerAdapter {
    private final Http2Connection connection;
    private final Http2FrameListener listener;

    public InboundHttpToHttp2Adapter(Http2Connection connection, Http2FrameListener listener) {
        this.connection = connection;
        this.listener = listener;
    }

    private static int getStreamId(Http2Connection connection, HttpHeaders httpHeaders) {
        return httpHeaders.getInt(HttpConversionUtil.ExtensionHeaderNames.STREAM_ID.text(),
                                  connection.remote().incrementAndGetNextStreamId());
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        if (msg instanceof FullHttpMessage) {
            handle(ctx, connection, listener, (FullHttpMessage) msg);
        } else {
            super.channelRead(ctx, msg);
        }
    }

    // note that this may behave strangely when used for the initial upgrade
    // message when using h2c, since that message is ineligible for flow
    // control, but there is not yet an API for signaling that.
    static void handle(ChannelHandlerContext ctx, Http2Connection connection,
                              Http2FrameListener listener, FullHttpMessage message) throws Http2Exception {
        try {
            int streamId = getStreamId(connection, message.headers());
            Http2Stream stream = connection.stream(streamId);
            if (stream == null) {
                stream = connection.remote().createStream(streamId, false);
            }
            message.headers().set(HttpConversionUtil.ExtensionHeaderNames.SCHEME.text(), HttpScheme.HTTP.name());
            Http2Headers messageHeaders = HttpConversionUtil.toHttp2Headers(message, true);
            boolean hasContent = message.content().isReadable();
            boolean hasTrailers = !message.trailingHeaders().isEmpty();
            listener.onHeadersRead(
                    ctx, streamId, messageHeaders, 0, !(hasContent || hasTrailers));
            if (hasContent) {
                listener.onDataRead(ctx, streamId, message.content(), 0, !hasTrailers);
            }
            if (hasTrailers) {
                Http2Headers headers = HttpConversionUtil.toHttp2Headers(message.trailingHeaders(), true);
                listener.onHeadersRead(ctx, streamId, headers, 0, true);
            }
            stream.closeRemoteSide();
        } finally {
            message.release();
        }
    }
}