Davide Pesavento
89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2016-2022, Regents of the University of California,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University.
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*
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* This file is part of ndn-tools (Named Data Networking Essential Tools).
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* See AUTHORS.md for complete list of ndn-tools authors and contributors.
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*
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* ndn-tools is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* ndn-tools is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* ndn-tools, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*
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* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
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*
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* @author Wentao Shang
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* @author Steve DiBenedetto
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* @author Andrea Tosatto
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*/
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#include "consumer.hpp"
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namespace ndn::chunks {
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Consumer::Consumer(security::Validator& validator, std::ostream& os)
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: m_validator(validator)
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, m_outputStream(os)
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{
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}
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void
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Consumer::run(unique_ptr<DiscoverVersion> discover, unique_ptr<PipelineInterests> pipeline)
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{
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m_discover = std::move(discover);
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m_pipeline = std::move(pipeline);
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m_nextToPrint = 0;
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m_bufferedData.clear();
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m_discover->onDiscoverySuccess.connect([this] (const Name& versionedName) {
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m_pipeline->run(versionedName,
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FORWARD_TO_MEM_FN(handleData),
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[] (const std::string& msg) { NDN_THROW(std::runtime_error(msg)); });
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});
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m_discover->onDiscoveryFailure.connect([] (const std::string& msg) {
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NDN_THROW(std::runtime_error(msg));
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});
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m_discover->run();
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}
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void
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Consumer::handleData(const Data& data)
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{
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auto dataPtr = data.shared_from_this();
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m_validator.validate(data,
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[this, dataPtr] (const Data& data) {
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if (data.getContentType() == ndn::tlv::ContentType_Nack) {
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NDN_THROW(ApplicationNackError(data));
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}
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// 'data' passed to callback comes from DataValidationState and was not created with make_shared
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m_bufferedData[getSegmentFromPacket(data)] = dataPtr;
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writeInOrderData();
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},
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[] (const Data&, const security::ValidationError& error) {
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NDN_THROW(DataValidationError(error));
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});
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}
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void
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Consumer::writeInOrderData()
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{
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for (auto it = m_bufferedData.begin();
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it != m_bufferedData.end() && it->first == m_nextToPrint;
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it = m_bufferedData.erase(it), ++m_nextToPrint) {
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const Block& content = it->second->getContent();
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m_outputStream.write(reinterpret_cast<const char*>(content.value()), content.value_size());
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}
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}
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} // namespace ndn::chunks
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