blob: 6a869c542302a09a3b242e1aef637c8737b6584b [file] [log] [blame]
// Copyright 2016 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.
// Decodes the payload of a ALTSVC frame.
#include "http2/decoder/decode_buffer.h"
#include "http2/decoder/decode_status.h"
#include "http2/decoder/frame_decoder_state.h"
#include "http2/http2_structures.h"
#include "common/platform/api/quiche_export.h"
namespace http2 {
namespace test {
class AltSvcPayloadDecoderPeer;
} // namespace test
class QUICHE_EXPORT_PRIVATE AltSvcPayloadDecoder {
// States during decoding of a ALTSVC frame.
enum class PayloadState {
// Start decoding the fixed size structure at the start of an ALTSVC
// frame (Http2AltSvcFields).
// Handle the DecodeStatus returned from starting or resuming the
// decoding of Http2AltSvcFields. If complete, calls OnAltSvcStart.
// Reports the value of the strings (origin and value) of an ALTSVC frame
// to the listener.
// The initial decode buffer wasn't large enough for the Http2AltSvcFields,
// so this state resumes the decoding when ResumeDecodingPayload is called
// later with a new DecodeBuffer.
// Starts the decoding of a ALTSVC frame's payload, and completes it if the
// entire payload is in the provided decode buffer.
DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db);
// Resumes decoding a ALTSVC frame's payload that has been split across
// decode buffers.
DecodeStatus ResumeDecodingPayload(FrameDecoderState* state,
DecodeBuffer* db);
friend class test::AltSvcPayloadDecoderPeer;
// Implements state kDecodingStrings.
DecodeStatus DecodeStrings(FrameDecoderState* state, DecodeBuffer* db);
Http2AltSvcFields altsvc_fields_;
PayloadState payload_state_;
} // namespace http2