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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "net/http2/decoder/payload_decoders/continuation_payload_decoder.h" | |
6 | |
7 #include <stddef.h> | |
8 | |
9 #include "base/logging.h" | |
10 #include "net/http2/decoder/decode_buffer.h" | |
11 #include "net/http2/decoder/http2_frame_decoder_listener.h" | |
12 #include "net/http2/http2_constants.h" | |
13 #include "net/http2/http2_structures.h" | |
14 | |
15 namespace net { | |
16 | |
17 DecodeStatus ContinuationPayloadDecoder::StartDecodingPayload( | |
18 FrameDecoderState* state, | |
19 DecodeBuffer* db) { | |
20 const Http2FrameHeader& frame_header = state->frame_header(); | |
21 const uint32_t total_length = frame_header.payload_length; | |
22 | |
23 DVLOG(2) << "ContinuationPayloadDecoder::StartDecodingPayload: " | |
24 << frame_header; | |
25 DCHECK_EQ(Http2FrameType::CONTINUATION, frame_header.type); | |
26 DCHECK_LE(db->Remaining(), total_length); | |
27 DCHECK_EQ(0, frame_header.flags & ~(Http2FrameFlag::FLAG_END_HEADERS)); | |
28 | |
29 state->InitializeRemainders(); | |
30 state->listener()->OnContinuationStart(frame_header); | |
31 return ResumeDecodingPayload(state, db); | |
32 } | |
33 | |
34 DecodeStatus ContinuationPayloadDecoder::ResumeDecodingPayload( | |
35 FrameDecoderState* state, | |
36 DecodeBuffer* db) { | |
37 DVLOG(2) << "ContinuationPayloadDecoder::ResumeDecodingPayload" | |
38 << " remaining_payload=" << state->remaining_payload() | |
39 << " db->Remaining=" << db->Remaining(); | |
40 DCHECK_EQ(Http2FrameType::CONTINUATION, state->frame_header().type); | |
41 DCHECK_LE(state->remaining_payload(), state->frame_header().payload_length); | |
42 DCHECK_LE(db->Remaining(), state->remaining_payload()); | |
43 | |
44 size_t avail = db->Remaining(); | |
45 DCHECK_LE(avail, state->remaining_payload()); | |
46 if (avail > 0) { | |
47 state->listener()->OnHpackFragment(db->cursor(), avail); | |
48 db->AdvanceCursor(avail); | |
49 state->ConsumePayload(avail); | |
50 } | |
51 if (state->remaining_payload() == 0) { | |
52 state->listener()->OnContinuationEnd(); | |
53 return DecodeStatus::kDecodeDone; | |
54 } | |
55 return DecodeStatus::kDecodeInProgress; | |
56 } | |
57 | |
58 } // namespace net | |
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