68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright (c) Facebook, Inc. and its affiliates.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <folly/io/IOBufQueue.h>
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#include "rsocket/DuplexConnection.h"
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#include "rsocket/framing/ProtocolVersion.h"
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#include "rsocket/internal/Allowance.h"
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#include "yarpl/flowable/Subscription.h"
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namespace rsocket {
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class FramedReader : public DuplexConnection::Subscriber,
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public yarpl::flowable::Subscription,
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public std::enable_shared_from_this<FramedReader> {
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public:
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explicit FramedReader(std::shared_ptr<ProtocolVersion> version)
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: version_{std::move(version)} {}
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/// Set the inner subscriber which will be getting full frame payloads.
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void setInput(std::shared_ptr<DuplexConnection::Subscriber>);
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/// Cancel the subscription and error the inner subscriber.
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void error(std::string);
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// Subscriber.
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void onSubscribe(std::shared_ptr<yarpl::flowable::Subscription>) override;
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void onNext(std::unique_ptr<folly::IOBuf>) override;
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void onComplete() override;
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void onError(folly::exception_wrapper) override;
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// Subscription.
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void request(int64_t) override;
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void cancel() override;
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private:
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void parseFrames();
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bool ensureOrAutodetectProtocolVersion();
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size_t readFrameLength() const;
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std::shared_ptr<yarpl::flowable::Subscription> subscription_;
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std::shared_ptr<DuplexConnection::Subscriber> inner_;
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Allowance allowance_;
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bool dispatchingFrames_{false};
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folly::IOBufQueue payloadQueue_{folly::IOBufQueue::cacheChainLength()};
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const std::shared_ptr<ProtocolVersion> version_;
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};
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} // namespace rsocket
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