QTcpSocket *socket = new QTcpSocket();
    socket->connectToHost("time.nist.gov", 13);
    if (socket->waitForConnected())
    {
        if (socket->waitForReadyRead())
        {
            QString str(socket->readAll());
            str = str.trimmed();
            qDebug() << str;
            str = str.section(" ", 1, 2);
            qDebug() << str;
        }
    }
    socket->close();
    delete socket;