InboundHttp2ToHttpAdapter.java — netty Source File

Source Code

/*
 * Copyright 2014 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:
 *
 * https://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.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.FullHttpMessage;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpStatusClass;
import io.netty.handler.codec.http.HttpUtil;

import static io.netty.handler.codec.http2.Http2Error.INTERNAL_ERROR;
import static io.netty.handler.codec.http2.Http2Error.PROTOCOL_ERROR;
import static io.netty.handler.codec.http2.Http2Exception.connectionError;
import static io.netty.handler.codec.http.HttpResponseStatus.OK;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import static io.netty.util.internal.ObjectUtil.checkPositive;

/**
 * This adapter provides just header/data events from the HTTP message flow defined
 * in <a href="https://tools.ietf.org/html/rfc7540#section-8.1">[RFC 7540], Section 8.1</a>.
 * <p>
 * See {@link HttpToHttp2ConnectionHandler} to get translation from HTTP/1.x objects to HTTP/2 frames for writes.
 */
public class InboundHttp2ToHttpAdapter extends Http2EventAdapter {
    private static final ImmediateSendDetector DEFAULT_SEND_DETECTOR = new ImmediateSendDetector() {
        @Override
        public boolean mustSendImmediately(FullHttpMessage msg) {
            if (msg instanceof FullHttpResponse) {
                return ((FullHttpResponse) msg).status().codeClass() == HttpStatusClass.INFORMATIONAL;
            }
            if (msg instanceof FullHttpRequest) {
                return msg.headers().contains(HttpHeaderNames.EXPECT);
            }
            return false;
        }

        @Override
        public FullHttpMessage copyIfNeeded(ByteBufAllocator allocator, FullHttpMessage msg) {
            if (msg instanceof FullHttpRequest) {
                FullHttpRequest copy = ((FullHttpRequest) msg).replace(allocator.buffer(0));
                copy.headers().remove(HttpHeaderNames.EXPECT);
                return copy;
            }
            return null;
// ... (299 more lines)