io.gatling.http.client.impl.ChunkedInboundHttp2ToHttpAdapter.java Source code

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Here is the source code for io.gatling.http.client.impl.ChunkedInboundHttp2ToHttpAdapter.java

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/*
 * Copyright 2011-2018 GatlingCorp (https://gatling.io)
 *
 * Licensed 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.gatling.http.client.impl;

import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.*;
import io.netty.handler.codec.http2.*;
import io.netty.util.concurrent.Promise;

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

public class ChunkedInboundHttp2ToHttpAdapter extends Http2EventAdapter {

    private final boolean propagateSettings;
    private final Http2Connection connection;
    private final boolean validateHttpHeaders;
    private final Promise<Channel> whenHttp2Handshake;

    ChunkedInboundHttp2ToHttpAdapter(Http2Connection connection, boolean validateHttpHeaders,
            boolean propagateSettings, Promise<Channel> whenHttp2Handshake) {

        checkNotNull(connection, "connection");
        this.connection = connection;
        this.validateHttpHeaders = validateHttpHeaders;
        this.propagateSettings = propagateSettings;
        this.whenHttp2Handshake = whenHttp2Handshake;
    }

    @Override
    public int onDataRead(ChannelHandlerContext ctx, int streamId, ByteBuf data, int padding, boolean endOfStream)
            throws Http2Exception {
        Http2Stream stream = connection.stream(streamId);

        if (stream == null) {
            throw connectionError(PROTOCOL_ERROR, "Data Frame received for unknown stream id " + streamId);
        }

        final int processedBytes = data.readableBytes();

        HttpContent content = endOfStream ? new DefaultLastHttpContent(data) : new DefaultHttpContent(data);
        ctx.fireChannelRead(new Http2Content(content, streamId));
        return processedBytes + padding;
    }

    private void convertAndFire(ChannelHandlerContext ctx, int streamId, Http2Headers headers, boolean endOfStream)
            throws Http2Exception {
        HttpResponse response = HttpConversionUtil.toHttpResponse(streamId, headers, validateHttpHeaders);
        ctx.fireChannelRead(response);
        if (endOfStream) {
            ctx.fireChannelRead(new Http2Content(LastHttpContent.EMPTY_LAST_CONTENT, streamId));
        }
    }

    @Override
    public void onHeadersRead(ChannelHandlerContext ctx, int streamId, Http2Headers headers, int padding,
            boolean endOfStream) throws Http2Exception {
        convertAndFire(ctx, streamId, headers, endOfStream);
    }

    @Override
    public void onHeadersRead(ChannelHandlerContext ctx, int streamId, Http2Headers headers, int streamDependency,
            short weight, boolean exclusive, int padding, boolean endOfStream) throws Http2Exception {
        onHeadersRead(ctx, streamId, headers, padding, endOfStream);
    }

    @Override
    public void onRstStreamRead(ChannelHandlerContext ctx, int streamId, long errorCode) {
        ctx.fireExceptionCaught(Http2Exception.streamError(streamId, Http2Error.valueOf(errorCode),
                "HTTP/2 to HTTP layer caught stream reset"));
    }

    @Override
    public void onPushPromiseRead(ChannelHandlerContext ctx, int streamId, int promisedStreamId,
            Http2Headers headers, int padding) throws Http2Exception {
        if (connection.stream(promisedStreamId) != null)
            throw connectionError(PROTOCOL_ERROR, "Push Promise Frame received for pre-existing stream id %d",
                    promisedStreamId);

        if (headers.status() == null)
            headers.status(OK.codeAsText());

        convertAndFire(ctx, streamId, headers, true);
    }

    @Override
    public void onSettingsRead(ChannelHandlerContext ctx, Http2Settings settings) {

        if (!whenHttp2Handshake.isDone()) {
            whenHttp2Handshake.setSuccess(ctx.channel());
        }

        if (propagateSettings) {
            ctx.fireChannelRead(settings);
        }
    }
}