| // 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_PUSH_PROMISE_PAYLOAD_DECODER_H_ |
| #define QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_ |
| |
| // Decodes the payload of a PUSH_PROMISE 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 PushPromisePayloadDecoderPeer; |
| } // namespace test |
| |
| class QUICHE_EXPORT PushPromisePayloadDecoder { |
| public: |
| // States during decoding of a PUSH_PROMISE frame. |
| enum class PayloadState { |
| // The frame is padded and we need to read the PAD_LENGTH field (1 byte). |
| kReadPadLength, |
| |
| // Ready to start decoding the fixed size fields of the PUSH_PROMISE |
| // frame into push_promise_fields_. |
| kStartDecodingPushPromiseFields, |
| |
| // The decoder has already called OnPushPromiseStart, and is now reporting |
| // the HPACK block fragment to the listener's OnHpackFragment method. |
| kReadPayload, |
| |
| // The decoder has finished with the HPACK block fragment, and is now |
| // ready to skip the trailing padding, if the frame has any. |
| kSkipPadding, |
| |
| // The fixed size fields weren't all available when the decoder first tried |
| // to decode them (state kStartDecodingPushPromiseFields); this state |
| // resumes the decoding when ResumeDecodingPayload is called later. |
| kResumeDecodingPushPromiseFields, |
| }; |
| |
| // Starts the decoding of a PUSH_PROMISE 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 PUSH_PROMISE frame's payload that has been split across |
| // decode buffers. |
| DecodeStatus ResumeDecodingPayload(FrameDecoderState* state, |
| DecodeBuffer* db); |
| |
| private: |
| friend class test::PushPromisePayloadDecoderPeer; |
| |
| void ReportPushPromise(FrameDecoderState* state); |
| |
| PayloadState payload_state_; |
| Http2PushPromiseFields push_promise_fields_; |
| }; |
| |
| } // namespace http2 |
| |
| #endif // QUICHE_HTTP2_DECODER_PAYLOAD_DECODERS_PUSH_PROMISE_PAYLOAD_DECODER_H_ |