| // 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. |
| |
| #include "quiche/http2/decoder/payload_decoders/continuation_payload_decoder.h" |
| |
| #include <stddef.h> |
| |
| #include "quiche/http2/decoder/decode_buffer.h" |
| #include "quiche/http2/decoder/http2_frame_decoder_listener.h" |
| #include "quiche/http2/http2_constants.h" |
| #include "quiche/http2/http2_structures.h" |
| #include "quiche/common/platform/api/quiche_logging.h" |
| |
| namespace http2 { |
| |
| DecodeStatus ContinuationPayloadDecoder::StartDecodingPayload( |
| FrameDecoderState* state, DecodeBuffer* db) { |
| const Http2FrameHeader& frame_header = state->frame_header(); |
| const uint32_t total_length = frame_header.payload_length; |
| |
| QUICHE_DVLOG(2) << "ContinuationPayloadDecoder::StartDecodingPayload: " |
| << frame_header; |
| QUICHE_DCHECK_EQ(Http2FrameType::CONTINUATION, frame_header.type); |
| QUICHE_DCHECK_LE(db->Remaining(), total_length); |
| QUICHE_DCHECK_EQ(0, frame_header.flags & ~(Http2FrameFlag::END_HEADERS)); |
| |
| state->InitializeRemainders(); |
| state->listener()->OnContinuationStart(frame_header); |
| return ResumeDecodingPayload(state, db); |
| } |
| |
| DecodeStatus ContinuationPayloadDecoder::ResumeDecodingPayload( |
| FrameDecoderState* state, DecodeBuffer* db) { |
| QUICHE_DVLOG(2) << "ContinuationPayloadDecoder::ResumeDecodingPayload" |
| << " remaining_payload=" << state->remaining_payload() |
| << " db->Remaining=" << db->Remaining(); |
| QUICHE_DCHECK_EQ(Http2FrameType::CONTINUATION, state->frame_header().type); |
| QUICHE_DCHECK_LE(state->remaining_payload(), |
| state->frame_header().payload_length); |
| QUICHE_DCHECK_LE(db->Remaining(), state->remaining_payload()); |
| |
| size_t avail = db->Remaining(); |
| QUICHE_DCHECK_LE(avail, state->remaining_payload()); |
| if (avail > 0) { |
| state->listener()->OnHpackFragment(db->cursor(), avail); |
| db->AdvanceCursor(avail); |
| state->ConsumePayload(avail); |
| } |
| if (state->remaining_payload() == 0) { |
| state->listener()->OnContinuationEnd(); |
| return DecodeStatus::kDecodeDone; |
| } |
| return DecodeStatus::kDecodeInProgress; |
| } |
| |
| } // namespace http2 |