Http2ClientUpgradeCodec.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.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.base64.Base64;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpClientUpgradeHandler;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.util.collection.CharObjectMap;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

import static io.netty.handler.codec.base64.Base64Dialect.URL_SAFE;
import static io.netty.handler.codec.http2.Http2CodecUtil.HTTP_UPGRADE_PROTOCOL_NAME;
import static io.netty.handler.codec.http2.Http2CodecUtil.HTTP_UPGRADE_SETTINGS_HEADER;
import static io.netty.handler.codec.http2.Http2CodecUtil.SETTING_ENTRY_LENGTH;
import static io.netty.util.CharsetUtil.UTF_8;
import static io.netty.util.ReferenceCountUtil.release;
import static io.netty.util.internal.ObjectUtil.checkNotNull;

/**
 * Client-side cleartext upgrade codec from HTTP to HTTP/2.
 */
public class Http2ClientUpgradeCodec implements HttpClientUpgradeHandler.UpgradeCodec {

    private static final List<CharSequence> UPGRADE_HEADERS = Collections.singletonList(HTTP_UPGRADE_SETTINGS_HEADER);

    private final String handlerName;
    private final Http2ConnectionHandler connectionHandler;
    private final ChannelHandler upgradeToHandler;
    private final ChannelHandler http2MultiplexHandler;

    public Http2ClientUpgradeCodec(Http2FrameCodec frameCodec, ChannelHandler upgradeToHandler) {
        this(null, frameCodec, upgradeToHandler);
    }

    public Http2ClientUpgradeCodec(String handlerName, Http2FrameCodec frameCodec, ChannelHandler upgradeToHandler) {
        this(handlerName, (Http2ConnectionHandler) frameCodec, upgradeToHandler, null);
    }

    /**
     * Creates the codec using a default name for the connection handler when adding to the
     * pipeline.
// ... (114 more lines)