SpdyFrameCodec.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.spdy;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandler;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.UnsupportedMessageTypeException;

import java.net.SocketAddress;
import java.util.List;

/**
 * A {@link ChannelHandler} that encodes and decodes SPDY Frames.
 */
public class SpdyFrameCodec extends ByteToMessageDecoder
        implements SpdyFrameDecoderDelegate, ChannelOutboundHandler {

    protected static final SpdyProtocolException INVALID_FRAME =
        new SpdyProtocolException("Received invalid frame");

    protected final SpdyFrameDecoder spdyFrameDecoder;
    protected final SpdyFrameEncoder spdyFrameEncoder;
    private final SpdyHeaderBlockDecoder spdyHeaderBlockDecoder;
    private final SpdyHeaderBlockEncoder spdyHeaderBlockEncoder;

    private SpdyHeadersFrame spdyHeadersFrame;
    private SpdySettingsFrame spdySettingsFrame;

    private ChannelHandlerContext ctx;
    private boolean read;
    private final boolean validateHeaders;
    private final boolean supportsUnknownFrames;

    /**
     * Creates a new instance with the specified {@code version},
     * {@code validateHeaders (true)}, and
     * the default decoder and encoder options
     * ({@code maxChunkSize (8192)}, {@code maxHeaderSize (16384)},
     * {@code compressionLevel (6)}, {@code windowBits (15)},
     * and {@code memLevel (8)}).
     */
    public SpdyFrameCodec(SpdyVersion version) {
        this(version, true);
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