void MyServer::slotNewConnection()
{
    QTcpSocket* pClientSocket = m_ptcpServer->nextPendingConnection();
    connect(pClientSocket, SIGNAL(disconnected()),
            pClientSocket, SLOT(deleteLater())
           );
    connect(pClientSocket, SIGNAL(readyRead()),
            this,          SLOT(slotReadClient())
           );

    sendToClient(pClientSocket, "Server Response: Connected!");
}
void MyServer::slotReadClient()
{
    QTcpSocket* pClientSocket = (QTcpSocket*)sender();
    QTcpSocket *tcpSocket = (QTcpSocket*)sender();
    QDataStream clientReadStream(&tcpSocket);
    QDataStream in(pClientSocket);
    in.setVersion(QDataStream::Qt_5_7);
    for (;;) {
        if (!m_nNextBlockSize) {
            if (pClientSocket->bytesAvailable() < sizeof(quint16)) {
                break;
            }
            in >> m_nNextBlockSize;
        }

        if (pClientSocket->bytesAvailable() < m_nNextBlockSize) {
            break;
        }
        QTime   time;
        QString str;
        in >> time >> str;

        QString strMessage =
            time.toString() + " " + "Client has sended - " + str;
        m_ptxt->append(strMessage);

        m_nNextBlockSize = 0;

        sendToClient(pClientSocket,
                     "Server Response: Received \"" + str + "\""
                    );
    }
}