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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_ALTSVC_PAYLOAD_DECODER_H_ |
| 6 #define NET_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_ |
| 7 |
| 8 // Decodes the payload of a ALTSVC 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 AltSvcPayloadDecoderPeer; |
| 19 } // namespace test |
| 20 |
| 21 class NET_EXPORT_PRIVATE AltSvcPayloadDecoder { |
| 22 public: |
| 23 // States during decoding of a ALTSVC frame. |
| 24 enum class PayloadState { |
| 25 // Start decoding the fixed size structure at the start of an ALTSVC |
| 26 // frame (Http2AltSvcFields). |
| 27 kStartDecodingStruct, |
| 28 |
| 29 // Handle the DecodeStatus returned from starting or resuming the |
| 30 // decoding of Http2AltSvcFields. If complete, calls OnAltSvcStart. |
| 31 kMaybeDecodedStruct, |
| 32 |
| 33 // Reports the value of the strings (origin and value) of an ALTSVC frame |
| 34 // to the listener. |
| 35 kDecodingStrings, |
| 36 |
| 37 // The initial decode buffer wasn't large enough for the Http2AltSvcFields, |
| 38 // so this state resumes the decoding when ResumeDecodingPayload is called |
| 39 // later with a new DecodeBuffer. |
| 40 kResumeDecodingStruct, |
| 41 }; |
| 42 |
| 43 // Starts the decoding of a ALTSVC frame's payload, and completes it if the |
| 44 // entire payload is in the provided decode buffer. |
| 45 DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db); |
| 46 |
| 47 // Resumes decoding a ALTSVC frame's payload that has been split across |
| 48 // decode buffers. |
| 49 DecodeStatus ResumeDecodingPayload(FrameDecoderState* state, |
| 50 DecodeBuffer* db); |
| 51 |
| 52 private: |
| 53 friend class test::AltSvcPayloadDecoderPeer; |
| 54 |
| 55 // Implements state kDecodingStrings. |
| 56 DecodeStatus DecodeStrings(FrameDecoderState* state, DecodeBuffer* db); |
| 57 |
| 58 Http2AltSvcFields altsvc_fields_; |
| 59 PayloadState payload_state_; |
| 60 }; |
| 61 |
| 62 } // namespace net |
| 63 |
| 64 #endif // NET_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_ |
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