Function main

examples/sftp/Sftp.cpp:96–461

/////////////////////////////////////////////////////// Entry point of application \return Application exit code ///////////////////////////////////////////////////////

///
////////////////////////////////////////////////////////////
int main()
{
    // Install SIGINT handler to allow the user to interrupt SFTP operations
    std::signal(SIGINT, [](int) { interrupt = true; });

    // Timeout predicate to check whether the ongoing operation has to be interrupted, poll at 1ms
    sf::TimeoutWithPredicate timeout([]() { return !interrupt; }, sf::milliseconds(1));

    // Choose the server address
    auto address = sf::IpAddress::Any;
    while (true)
    {
        std::string addressString;
        std::cout << "Enter the SFTP server hostname or IP address: ";
        std::cin >> addressString;
        if (const auto addresses = sf::Dns::resolve(addressString); addresses && !addresses->empty())
        {
            address = addresses->front();
            break;
        }
        std::cout << "The host could not be resolved to an IP address" << std::endl;
    }

    // Choose the server port
    std::optional<unsigned short> port;
    do
    {
        try
        {
            std::cout << "Enter the SFTP server port (empty to use default 22): ";
            std::string line;
            std::cin.ignore(10'000, '\n');
            std::getline(std::cin, line);
            port = static_cast<unsigned short>(line.empty() ? 22ul : std::stoul(line));
        } catch (const std::exception&)
        {
            continue;
        }
    } while (!port.has_value());

    // Connect to the server
    sf::Sftp server;
    if (const auto result = server.connect(address, port.value(), timeout); !checkResult(result))
        return EXIT_FAILURE;
    std::cout << "Connecting to SFTP server at " << address.toString() << " successful" << std::endl;

    // Print session information
    const auto sessionInfo = server.getSessionInfo();

    if (!sessionInfo.has_value())
    {
        std::cout << "Failed to retrieve session information" << std::endl;
        return EXIT_FAILURE;
    }

    std::cout << "\nHost key SHA256: " << std::hex << std::setw(2) << std::setfill('0');
    for (const auto b : sessionInfo->hostKey.sha256)
        std::cout << static_cast<int>(b);