QpackEncoder.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.buffer.ByteBufAllocator;
import io.netty.handler.codec.quic.QuicStreamChannel;
import io.netty.util.ReferenceCountUtil;
import io.netty.util.collection.LongObjectHashMap;

import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.Map;
import java.util.Queue;

import static io.netty.handler.codec.http3.Http3CodecUtils.closeOnFailure;
import static io.netty.handler.codec.http3.QpackHeaderField.sizeOf;
import static io.netty.handler.codec.http3.QpackUtil.encodePrefixedInteger;

/**
 * A QPACK encoder.
 */
final class QpackEncoder {
    private static final QpackException INVALID_SECTION_ACKNOWLEDGMENT =
            QpackException.newStatic(QpackDecoder.class, "sectionAcknowledgment(...)",
                    "QPACK - section acknowledgment received for unknown stream.");
    private static final int DYNAMIC_TABLE_ENCODE_NOT_DONE = -1;
    private static final int DYNAMIC_TABLE_ENCODE_NOT_POSSIBLE = -2;

    private final QpackHuffmanEncoder huffmanEncoder;
    private final QpackEncoderDynamicTable dynamicTable;
    private int maxBlockedStreams;
    private int blockedStreams;
    private LongObjectHashMap<Queue<Indices>> streamSectionTrackers;

    QpackEncoder() {
        this(new QpackEncoderDynamicTable());
    }

    QpackEncoder(QpackEncoderDynamicTable dynamicTable) {
        huffmanEncoder = new QpackHuffmanEncoder();
        this.dynamicTable = dynamicTable;
    }

    /**
     * Encode the header field into the header block.
     *
// ... (485 more lines)