QpackDecoder.java — netty Source File

Source Code

/*
 * Copyright 2020 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.http3;

import io.netty.buffer.ByteBuf;
import io.netty.handler.codec.quic.QuicStreamChannel;
import io.netty.util.AsciiString;
import io.netty.util.collection.IntObjectHashMap;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.util.ArrayList;
import java.util.List;
import java.util.function.BiConsumer;

import static io.netty.handler.codec.http3.Http3CodecUtils.closeOnFailure;
import static io.netty.handler.codec.http3.QpackDecoderStateSyncStrategy.ackEachInsert;
import static io.netty.handler.codec.http3.QpackUtil.decodePrefixedIntegerAsInt;
import static io.netty.handler.codec.http3.QpackUtil.encodePrefixedInteger;
import static io.netty.handler.codec.http3.QpackUtil.firstByteEquals;
import static io.netty.handler.codec.http3.QpackUtil.toIntOrThrow;
import static java.lang.Math.floorDiv;

final class QpackDecoder {
    private static final InternalLogger logger = InternalLoggerFactory.getInstance(QpackDecoder.class);
    private static final QpackException DYNAMIC_TABLE_CAPACITY_EXCEEDS_MAX =
            QpackException.newStatic(QpackDecoder.class, "setDynamicTableCapacity(...)",
                    "QPACK - decoder dynamic table capacity exceeds max capacity.");
    private static final QpackException HEADER_ILLEGAL_INDEX_VALUE =
            QpackException.newStatic(QpackDecoder.class, "decodeIndexed(...)", "QPACK - illegal index value");
    private static final QpackException NAME_ILLEGAL_INDEX_VALUE =
            QpackException.newStatic(QpackDecoder.class, "decodeLiteralWithNameRef(...)",
                    "QPACK - illegal name index value");
    private static final QpackException INVALID_REQUIRED_INSERT_COUNT =
            QpackException.newStatic(QpackDecoder.class, "decodeRequiredInsertCount(...)",
                    "QPACK - invalid required insert count");
    private static final QpackException MAX_BLOCKED_STREAMS_EXCEEDED =
            QpackException.newStatic(QpackDecoder.class, "shouldWaitForDynamicTableUpdates(...)",
                    "QPACK - exceeded max blocked streams");
    private static final QpackException BLOCKED_STREAM_RESUMPTION_FAILED =
            QpackException.newStatic(QpackDecoder.class, "sendInsertCountIncrementIfRequired(...)",
                    "QPACK - failed to resume a blocked stream");

    private static final QpackException UNKNOWN_TYPE =
            QpackException.newStatic(QpackDecoder.class, "decode(...)", "QPACK - unknown type");

    private final QpackHuffmanDecoder huffmanDecoder;
// ... (457 more lines)