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#include "Message.h"
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#include "Image/JpegImageCollection.h"
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#include "Util/Base64.h"
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#include <Logging.h>
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#include <StringAlgorithm.h>
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#include <filesystem/path.h>
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#include <sstream>
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namespace MailServer {
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Message::Message(const std::string& address, const Util::Context& context, const std::string& message) :
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m_address(address),
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m_context(context),
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m_mimeBoundary("-_-InvalidBoundary-_-"),
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m_contentEncoding("none"),
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m_currentImage(0)
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{
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ProcessMessage(message);
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}
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std::string Decode(const std::string& data)
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{
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std::string result;
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if (StringAlgorithm::istarts_with(data, "=?utf-8?"))
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result = Util::Base64::Decode(std::string(data.begin() + 10, data.begin() + data.find_last_of('?')));
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else
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result = Util::Base64::Decode(data);
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return result;
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}
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void Message::ProcessMessage(const std::string& message)
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{
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try
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{
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Message::State::type state = Message::State::Header;
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std::string line;
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std::istringstream stream(message);
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while (std::getline(stream, line, '\r'))
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{
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StringAlgorithm::erase_all(line, '\n');
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switch (state)
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{
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case State::Header:
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state = ProcessHeaderLine(line);
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break;
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case State::Data:
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state = ProcessDataLine(line);
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break;
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case State::MimeBoundary:
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state = ProcessMimeBoundary(line);
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break;
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case State::Image:
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state = ProcessImage(line);
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break;
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}
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}
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if (StringAlgorithm::contains(m_contentEncoding, "base64"))
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{
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std::string decoded = Decode(m_subject);
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if (decoded.size() > 0)
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m_subject = decoded;
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}
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std::stringstream ss;
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ss << "From: " << m_sender << std::endl;
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Logging::Log(Logging::Severity::Debug, ss.str());
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ss.str("");
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ss << "To: " << m_receiver << std::endl;
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Logging::Log(Logging::Severity::Debug, ss.str());
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ss.str("");
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ss << "Subject: " << m_subject << std::endl;
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Logging::Log(Logging::Severity::Debug, ss.str());
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ss.str("");
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ss << "Received " << m_images.size() << " Images" << std::endl;
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Logging::Log(Logging::Severity::Info, ss.str());
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Image::JpegImageCollection imageCollection(m_images);
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filesystem::path path(m_context.path);
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path = path.make_absolute();
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path = path/filesystem::path(m_address);
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if (!path.exists())
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filesystem::create_directory(path);
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std::string fileName(Util::getTimeString());
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fileName.append(".jpg");
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path = path/filesystem::path(fileName);
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imageCollection.Save(path.str());
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ss.str("");
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ss << "Images Stored as " << path.str() << std::endl;
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Logging::Log(Logging::Severity::Info, ss.str());
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if (!m_context.url.empty())
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{
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std::stringstream url;
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url << m_context.url << "?ip=" << m_address << "&file=" << fileName;
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m_context.client.GetUrlContents(url.str());
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}
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}
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catch (std::exception& e)
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{
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std::stringstream ss;
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ss << "Message::ProcessMessage() - Error: " << e.what() << std::endl;
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Logging::Log(Logging::Severity::Error, ss.str());
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}
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}
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Message::State::type Message::ProcessHeaderLine(const std::string& line)
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{
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if (line.empty())
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return Message::State::Data;
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if (StringAlgorithm::istarts_with(line, "from:"))
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{
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m_sender = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::Header;
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}
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if (StringAlgorithm::istarts_with(line, "to:"))
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{
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m_receiver = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::Header;
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}
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if (StringAlgorithm::istarts_with(line, "subject:"))
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{
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m_subject = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::Header;
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}
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if (StringAlgorithm::istarts_with(line, "date"))
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{
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m_date = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::Header;
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}
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if (StringAlgorithm::istarts_with(line, "content-type:"))
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{
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m_contentType = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::Header;
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}
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if (StringAlgorithm::istarts_with(line, "boundary") || StringAlgorithm::istarts_with(line, "\tboundary") || StringAlgorithm::istarts_with(line, " boundary"))
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{
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m_mimeBoundary = std::string("--").append(std::string(line.begin() + line.find_first_of('"') + 1, line.begin() + line.find_last_of('"')));
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return Message::State::Header;
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}
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if (StringAlgorithm::istarts_with(line, "content-transfer-encoding:"))
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{
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m_contentEncoding = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::Header;
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}
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return Message::State::Header;
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}
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Message::State::type Message::ProcessDataLine(const std::string& line)
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{
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if (StringAlgorithm::istarts_with(line, m_mimeBoundary))
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{
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m_contentType = "";
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return Message::State::MimeBoundary;
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}
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return Message::State::Data;
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}
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Message::State::type Message::ProcessMimeBoundary(const std::string& line)
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{
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if (line.empty())
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{
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if (StringAlgorithm::istarts_with(m_contentType, "image/jpeg") || StringAlgorithm::istarts_with(m_contentType, "image/jpg"))
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{
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m_mimeImages.push_back(Image::MimeImage(m_imageName));
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m_imageName = "";
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return Message::State::Image;
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}
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return Message::State::Data;
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}
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if (StringAlgorithm::istarts_with(line, "content-type:"))
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{
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m_contentType = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::MimeBoundary;
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}
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if (StringAlgorithm::istarts_with(line, "name") || StringAlgorithm::istarts_with(line, "\tname"))
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{
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m_imageName = "image.jpg";
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//m_imageName = Decode(std::string(line.begin() + line.find_first_of('"') + 1, line.begin() + line.find_last_of('"')));
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return Message::State::MimeBoundary;
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}
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if (StringAlgorithm::istarts_with(line, "content-transfer-encoding:"))
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{
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m_contentEncoding = std::string(line.begin() + line.find_first_of(' ') + 1, line.end());
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return Message::State::MimeBoundary;
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}
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return Message::State::MimeBoundary;
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}
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Message::State::type Message::ProcessImage(const std::string& line)
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{
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if (StringAlgorithm::istarts_with(line, m_mimeBoundary))
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{
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m_images.push_back(m_mimeImages[m_currentImage].DecodeImageData());
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++m_currentImage;
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m_contentType = "";
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return Message::State::MimeBoundary;
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}
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m_mimeImages[m_currentImage].AppendData(line);
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return Message::State::Image;
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}
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} // namespace MailServer
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