chromium/net/third_party/quiche/src/quiche/quic/core/qpack/qpack_decoder.h

// Copyright (c) 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef QUICHE_QUIC_CORE_QPACK_QPACK_DECODER_H_
#define QUICHE_QUIC_CORE_QPACK_QPACK_DECODER_H_

#include <cstdint>
#include <memory>
#include <set>

#include "absl/strings/string_view.h"
#include "quiche/quic/core/qpack/qpack_decoder_stream_sender.h"
#include "quiche/quic/core/qpack/qpack_encoder_stream_receiver.h"
#include "quiche/quic/core/qpack/qpack_header_table.h"
#include "quiche/quic/core/qpack/qpack_progressive_decoder.h"
#include "quiche/quic/core/quic_error_codes.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/platform/api/quic_export.h"

namespace quic {

// QPACK decoder class.  Exactly one instance should exist per QUIC connection.
// This class vends a new QpackProgressiveDecoder instance for each new header
// list to be encoded.
// QpackProgressiveDecoder detects and signals errors with header blocks, which
// are stream errors.
// The only input of QpackDecoder is the encoder stream.  Any error QpackDecoder
// signals is an encoder stream error, which is fatal to the connection.
class QUICHE_EXPORT QpackDecoder
    : public QpackEncoderStreamReceiver::Delegate,
      public QpackProgressiveDecoder::BlockedStreamLimitEnforcer,
      public QpackProgressiveDecoder::DecodingCompletedVisitor { … };

// QpackDecoder::EncoderStreamErrorDelegate implementation that does nothing.
class QUICHE_EXPORT NoopEncoderStreamErrorDelegate
    : public QpackDecoder::EncoderStreamErrorDelegate { … };

}  // namespace quic

#endif  // QUICHE_QUIC_CORE_QPACK_QPACK_DECODER_H_