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59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
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// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/http2/decoder/payload_decoders/continuation_payload_decoder.h"
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#include <stddef.h>
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#include "base/logging.h"
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#include "net/http2/decoder/decode_buffer.h"
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#include "net/http2/decoder/http2_frame_decoder_listener.h"
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#include "net/http2/http2_constants.h"
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#include "net/http2/http2_structures.h"
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namespace net {
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DecodeStatus ContinuationPayloadDecoder::StartDecodingPayload(
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FrameDecoderState* state,
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DecodeBuffer* db) {
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const Http2FrameHeader& frame_header = state->frame_header();
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const uint32_t total_length = frame_header.payload_length;
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DVLOG(2) << "ContinuationPayloadDecoder::StartDecodingPayload: "
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<< frame_header;
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DCHECK_EQ(Http2FrameType::CONTINUATION, frame_header.type);
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DCHECK_LE(db->Remaining(), total_length);
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DCHECK_EQ(0, frame_header.flags & ~(Http2FrameFlag::END_HEADERS));
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state->InitializeRemainders();
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state->listener()->OnContinuationStart(frame_header);
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return ResumeDecodingPayload(state, db);
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}
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DecodeStatus ContinuationPayloadDecoder::ResumeDecodingPayload(
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FrameDecoderState* state,
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DecodeBuffer* db) {
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DVLOG(2) << "ContinuationPayloadDecoder::ResumeDecodingPayload"
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<< " remaining_payload=" << state->remaining_payload()
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<< " db->Remaining=" << db->Remaining();
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DCHECK_EQ(Http2FrameType::CONTINUATION, state->frame_header().type);
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DCHECK_LE(state->remaining_payload(), state->frame_header().payload_length);
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DCHECK_LE(db->Remaining(), state->remaining_payload());
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size_t avail = db->Remaining();
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DCHECK_LE(avail, state->remaining_payload());
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if (avail > 0) {
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state->listener()->OnHpackFragment(db->cursor(), avail);
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db->AdvanceCursor(avail);
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state->ConsumePayload(avail);
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}
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if (state->remaining_payload() == 0) {
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state->listener()->OnContinuationEnd();
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return DecodeStatus::kDecodeDone;
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}
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return DecodeStatus::kDecodeInProgress;
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}
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} // namespace net
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