blob: ab53a1dc318dc590b7bcd05002fb750bfd009176 [file] [log] [blame]
// 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.
#include <cstdint>
#include "absl/strings/string_view.h"
#include "quiche/quic/core/qpack/qpack_instruction_encoder.h"
#include "quiche/quic/core/qpack/qpack_stream_sender_delegate.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/platform/api/quic_export.h"
namespace quic {
// This class serializes instructions for transmission on the encoder stream.
// Serialized instructions are buffered until Flush() is called.
class QUIC_EXPORT_PRIVATE QpackEncoderStreamSender {
QpackEncoderStreamSender(const QpackEncoderStreamSender&) = delete;
QpackEncoderStreamSender& operator=(const QpackEncoderStreamSender&) = delete;
// Methods for serializing and buffering instructions, see
// 5.2.1. Insert With Name Reference
void SendInsertWithNameReference(bool is_static, uint64_t name_index,
absl::string_view value);
// 5.2.2. Insert Without Name Reference
void SendInsertWithoutNameReference(absl::string_view name,
absl::string_view value);
// 5.2.3. Duplicate
void SendDuplicate(uint64_t index);
// 5.2.4. Set Dynamic Table Capacity
void SendSetDynamicTableCapacity(uint64_t capacity);
// Returns number of bytes buffered by this object.
// There is no limit on how much data this object is willing to buffer.
QuicByteCount BufferedByteCount() const { return buffer_.size(); }
// Returns whether writing to the encoder stream is allowed. Writing is
// disallowed if the amount of data buffered by the underlying stream exceeds
// a hardcoded limit, in order to limit memory consumption in case the encoder
// stream is blocked. CanWrite() returning true does not mean that the
// encoder stream is not blocked, it just means the blocked data does not
// exceed the threshold.
bool CanWrite() const;
// Writes all buffered instructions on the encoder stream.
void Flush();
// delegate must be set if dynamic table capacity is not zero.
void set_qpack_stream_sender_delegate(QpackStreamSenderDelegate* delegate) {
delegate_ = delegate;
QpackStreamSenderDelegate* delegate_;
QpackInstructionEncoder instruction_encoder_;
std::string buffer_;
} // namespace quic