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65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
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// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_
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#define NET_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_
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// Decodes the payload of a ALTSVC frame.
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#include "net/http2/decoder/decode_buffer.h"
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#include "net/http2/decoder/decode_status.h"
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#include "net/http2/decoder/frame_decoder_state.h"
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#include "net/http2/http2_structures.h"
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#include "net/http2/platform/api/http2_export.h"
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namespace net {
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namespace test {
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class AltSvcPayloadDecoderPeer;
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} // namespace test
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class HTTP2_EXPORT_PRIVATE AltSvcPayloadDecoder {
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public:
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// States during decoding of a ALTSVC frame.
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enum class PayloadState {
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// Start decoding the fixed size structure at the start of an ALTSVC
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// frame (Http2AltSvcFields).
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kStartDecodingStruct,
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// Handle the DecodeStatus returned from starting or resuming the
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// decoding of Http2AltSvcFields. If complete, calls OnAltSvcStart.
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kMaybeDecodedStruct,
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// Reports the value of the strings (origin and value) of an ALTSVC frame
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// to the listener.
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kDecodingStrings,
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// The initial decode buffer wasn't large enough for the Http2AltSvcFields,
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// so this state resumes the decoding when ResumeDecodingPayload is called
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// later with a new DecodeBuffer.
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kResumeDecodingStruct,
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};
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// Starts the decoding of a ALTSVC frame's payload, and completes it if the
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// entire payload is in the provided decode buffer.
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DecodeStatus StartDecodingPayload(FrameDecoderState* state, DecodeBuffer* db);
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// Resumes decoding a ALTSVC frame's payload that has been split across
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// decode buffers.
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DecodeStatus ResumeDecodingPayload(FrameDecoderState* state,
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DecodeBuffer* db);
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private:
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friend class test::AltSvcPayloadDecoderPeer;
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// Implements state kDecodingStrings.
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DecodeStatus DecodeStrings(FrameDecoderState* state, DecodeBuffer* db);
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Http2AltSvcFields altsvc_fields_;
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PayloadState payload_state_;
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};
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} // namespace net
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#endif // NET_HTTP2_DECODER_PAYLOAD_DECODERS_ALTSVC_PAYLOAD_DECODER_H_
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