| // 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. |
| |
| #ifndef QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_ |
| #define QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_ |
| |
| // Decodes the payload of a ALTSVC frame. |
| |
| #include "quiche/http2/decoder/decode_buffer.h" |
| #include "quiche/http2/decoder/decode_status.h" |
| #include "quiche/http2/decoder/frame_decoder_state.h" |
| #include "quiche/http2/http2_structures.h" |
| #include "quiche/common/platform/api/quiche_export.h" |
| |
| namespace http2 { |
| namespace test { |
| class AltSvcPayloadDecoderPeer; |
| } // namespace test |
| |
| class QUICHE_EXPORT AltSvcPayloadDecoder { |
| public: |
| // States during decoding of a ALTSVC frame. |
| enum class PayloadState { |
| // Start decoding the fixed size structure at the start of an ALTSVC |
| // frame (Http2AltSvcFields). |
| kStartDecodingStruct, |
| |
| // Handle the DecodeStatus returned from starting or resuming the |
| // decoding of Http2AltSvcFields. If complete, calls OnAltSvcStart. |
| kMaybeDecodedStruct, |
| |
| // Reports the value of the strings (origin and value) of an ALTSVC frame |
| // to the listener. |
| kDecodingStrings, |
| |
| // The initial decode buffer wasn't large enough for the Http2AltSvcFields, |
| // so this state resumes the decoding when ResumeDecodingPayload is called |
| // later with a new DecodeBuffer. |
| kResumeDecodingStruct, |
| }; |
| |
| // Starts the decoding of a ALTSVC frame's payload, and completes it if the |
| // entire payload is in the provided decode buffer. |
| DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db); |
| |
| // Resumes decoding a ALTSVC frame's payload that has been split across |
| // decode buffers. |
| DecodeStatus ResumeDecodingPayload(FrameDecoderState* state, |
| DecodeBuffer* db); |
| |
| private: |
| friend class test::AltSvcPayloadDecoderPeer; |
| |
| // Implements state kDecodingStrings. |
| DecodeStatus DecodeStrings(FrameDecoderState* state, DecodeBuffer* db); |
| |
| Http2AltSvcFields altsvc_fields_; |
| PayloadState payload_state_; |
| }; |
| |
| } // namespace http2 |
| |
| #endif // QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_ |