| // 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 "quiche/quic/core/qpack/qpack_decoder_stream_sender.h" |
| |
| #include <cstddef> |
| #include <limits> |
| #include <string> |
| #include <utility> |
| |
| #include "absl/strings/string_view.h" |
| #include "quiche/quic/core/qpack/qpack_instructions.h" |
| #include "quiche/quic/platform/api/quic_flag_utils.h" |
| #include "quiche/quic/platform/api/quic_logging.h" |
| |
| namespace quic { |
| |
| QpackDecoderStreamSender::QpackDecoderStreamSender() |
| : delegate_(nullptr), |
| // None of the instructions sent by the QpackDecoderStreamSender |
| // are strings, so huffman encoding is not relevant. |
| instruction_encoder_(HuffmanEncoding::kEnabled) {} |
| |
| void QpackDecoderStreamSender::SendInsertCountIncrement(uint64_t increment) { |
| instruction_encoder_.Encode( |
| QpackInstructionWithValues::InsertCountIncrement(increment), &buffer_); |
| } |
| |
| void QpackDecoderStreamSender::SendHeaderAcknowledgement( |
| QuicStreamId stream_id) { |
| instruction_encoder_.Encode( |
| QpackInstructionWithValues::HeaderAcknowledgement(stream_id), &buffer_); |
| } |
| |
| void QpackDecoderStreamSender::SendStreamCancellation(QuicStreamId stream_id) { |
| instruction_encoder_.Encode( |
| QpackInstructionWithValues::StreamCancellation(stream_id), &buffer_); |
| } |
| |
| void QpackDecoderStreamSender::Flush() { |
| if (buffer_.empty() || delegate_ == nullptr) { |
| return; |
| } |
| if (GetQuicRestartFlag(quic_opport_bundle_qpack_decoder_data4)) { |
| QUIC_RESTART_FLAG_COUNT_N(quic_opport_bundle_qpack_decoder_data4, 3, 4); |
| // Swap buffer_ before calling WriteStreamData, which might result in a |
| // reentrant call to `Flush()`. |
| std::string copy; |
| std::swap(copy, buffer_); |
| delegate_->WriteStreamData(copy); |
| return; |
| } |
| delegate_->WriteStreamData(buffer_); |
| buffer_.clear(); |
| } |
| |
| } // namespace quic |