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