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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 #ifndef NET_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_ | |
6 #define NET_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_ | |
7 | |
8 // Decodes the payload of a PUSH_PROMISE frame. | |
9 | |
10 #include "net/base/net_export.h" | |
11 #include "net/http2/decoder/decode_buffer.h" | |
12 #include "net/http2/decoder/decode_status.h" | |
13 #include "net/http2/decoder/frame_decoder_state.h" | |
14 #include "net/http2/http2_structures.h" | |
15 | |
16 namespace net { | |
17 namespace test { | |
18 class PushPromisePayloadDecoderPeer; | |
19 } // namespace test | |
20 | |
21 class NET_EXPORT_PRIVATE PushPromisePayloadDecoder { | |
22 public: | |
23 // States during decoding of a PUSH_PROMISE frame. | |
24 enum class PayloadState { | |
25 // The frame is padded and we need to read the PAD_LENGTH field (1 byte). | |
26 kReadPadLength, | |
27 | |
28 // Ready to start decoding the fixed size fields of the PUSH_PROMISE | |
29 // frame into push_promise_fields_. | |
30 kStartDecodingPushPromiseFields, | |
31 | |
32 // The decoder has already called OnPushPromiseStart, and is now reporting | |
33 // the HPACK block fragment to the listener's OnHpackFragment method. | |
34 kReadPayload, | |
35 | |
36 // The decoder has finished with the HPACK block fragment, and is now | |
37 // ready to skip the trailing padding, if the frame has any. | |
38 kSkipPadding, | |
39 | |
40 // The fixed size fields weren't all available when the decoder first tried | |
41 // to decode them (state kStartDecodingPushPromiseFields); this state | |
42 // resumes the decoding when ResumeDecodingPayload is called later. | |
43 kResumeDecodingPushPromiseFields, | |
44 }; | |
45 | |
46 // Starts the decoding of a PUSH_PROMISE frame's payload, and completes it if | |
47 // the entire payload is in the provided decode buffer. | |
48 DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db); | |
49 | |
50 // Resumes decoding a PUSH_PROMISE frame's payload that has been split across | |
51 // decode buffers. | |
52 DecodeStatus ResumeDecodingPayload(FrameDecoderState* state, | |
53 DecodeBuffer* db); | |
54 | |
55 private: | |
56 friend class test::PushPromisePayloadDecoderPeer; | |
57 | |
58 void ReportPushPromise(FrameDecoderState* state); | |
59 | |
60 PayloadState payload_state_; | |
61 Http2PushPromiseFields push_promise_fields_; | |
62 }; | |
63 | |
64 } // namespace net | |
65 | |
66 #endif // NET_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_ | |
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