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// 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_HTTP_HTTP_ENCODER_H_
#define QUICHE_QUIC_CORE_HTTP_HTTP_ENCODER_H_
#include <memory>
#include "quiche/quic/core/http/http_frames.h"
#include "quiche/quic/core/quic_error_codes.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/platform/api/quic_export.h"
#include "quiche/common/quiche_buffer_allocator.h"
namespace quic {
class QuicDataWriter;
// A class for encoding the HTTP frames that are exchanged in an HTTP over QUIC
// session.
class QUIC_EXPORT_PRIVATE HttpEncoder {
public:
HttpEncoder() = delete;
// Returns the length of the header for a DATA frame.
static QuicByteCount GetDataFrameHeaderLength(QuicByteCount payload_length);
// Serializes a DATA frame header into a QuicheBuffer; returns said
// QuicheBuffer on success, empty buffer otherwise.
static quiche::QuicheBuffer SerializeDataFrameHeader(
QuicByteCount payload_length, quiche::QuicheBufferAllocator* allocator);
// Serializes a HEADERS frame header into a new buffer stored in |output|.
// Returns the length of the buffer on success, or 0 otherwise.
static QuicByteCount SerializeHeadersFrameHeader(
QuicByteCount payload_length, std::unique_ptr<char[]>* output);
// Serializes a SETTINGS frame into a new buffer stored in |output|.
// Returns the length of the buffer on success, or 0 otherwise.
static QuicByteCount SerializeSettingsFrame(const SettingsFrame& settings,
std::unique_ptr<char[]>* output);
// Serializes a GOAWAY frame into a new buffer stored in |output|.
// Returns the length of the buffer on success, or 0 otherwise.
static QuicByteCount SerializeGoAwayFrame(const GoAwayFrame& goaway,
std::unique_ptr<char[]>* output);
// Serializes a PRIORITY_UPDATE frame into a new buffer stored in |output|.
// Returns the length of the buffer on success, or 0 otherwise.
static QuicByteCount SerializePriorityUpdateFrame(
const PriorityUpdateFrame& priority_update,
std::unique_ptr<char[]>* output);
// Serializes an ACCEPT_CH frame into a new buffer stored in |output|.
// Returns the length of the buffer on success, or 0 otherwise.
static QuicByteCount SerializeAcceptChFrame(const AcceptChFrame& accept_ch,
std::unique_ptr<char[]>* output);
// Serializes a frame with reserved frame type specified in
// https://tools.ietf.org/html/draft-ietf-quic-http-25#section-7.2.9.
static QuicByteCount SerializeGreasingFrame(std::unique_ptr<char[]>* output);
// Serializes a WEBTRANSPORT_STREAM frame header as specified in
// https://www.ietf.org/archive/id/draft-ietf-webtrans-http3-00.html#name-client-initiated-bidirectio
static QuicByteCount SerializeWebTransportStreamFrameHeader(
WebTransportSessionId session_id, std::unique_ptr<char[]>* output);
};
} // namespace quic
#endif // QUICHE_QUIC_CORE_HTTP_HTTP_ENCODER_H_