Http2ServerUpgradeCodec.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.ByteBufUtil;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.base64.Base64;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpServerUpgradeHandler;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.nio.CharBuffer;
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.FRAME_HEADER_LENGTH;
import static io.netty.handler.codec.http2.Http2CodecUtil.HTTP_UPGRADE_SETTINGS_HEADER;
import static io.netty.handler.codec.http2.Http2CodecUtil.writeFrameHeader;
import static io.netty.handler.codec.http2.Http2FrameTypes.SETTINGS;

/**
 * Server-side codec for performing a cleartext upgrade from HTTP/1.x to HTTP/2.
 */
public class Http2ServerUpgradeCodec implements HttpServerUpgradeHandler.UpgradeCodec {

    private static final InternalLogger logger = InternalLoggerFactory.getInstance(Http2ServerUpgradeCodec.class);
    private static final List<CharSequence> REQUIRED_UPGRADE_HEADERS =
            Collections.singletonList(HTTP_UPGRADE_SETTINGS_HEADER);
    private static final ChannelHandler[] EMPTY_HANDLERS = new ChannelHandler[0];

    private final String handlerName;
    private final Http2ConnectionHandler connectionHandler;
    private final ChannelHandler[] handlers;
    private final Http2FrameReader frameReader;

    private Http2Settings settings;

    /**
     * Creates the codec using a default name for the connection handler when adding to the
     * pipeline.
     *
// ... (152 more lines)