ftpdatachannel.h Example File

ftpclient/ftpdatachannel.h
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 #ifndef FTPDATACHANNEL_H
 #define FTPDATACHANNEL_H

 #include <QObject>
 #include <QScopedPointer>
 #include <QTcpServer>
 #include <QTcpSocket>

 class FtpDataChannel : public QObject
 {
     Q_OBJECT
 public:
     explicit FtpDataChannel(QObject *parent = nullptr);

     // Listen on a local address.
     void listen(const QHostAddress &address = QHostAddress::Any);

     // Send data over the socket.
     void sendData(const QByteArray &data);

     // Close the connection.
     void close();

     // Retrieve the port specification to be announced on the control channel.
     // Something like "a,b,c,d,xxx,yyy" where
     // - a.b.c.d would be the IP address in decimal/dot notation and
     // - xxx,yyy are the upper and lower 8 bits of the TCP port in decimal
     // (This will only work if the local address we're listening on
     // is actually meaningful)
     QString portspec() const;

 signals:

     // The FTP server has sent some data.
     void dataReceived(const QByteArray &data);

 private:
     QTcpServer m_server;
     QScopedPointer<QTcpSocket> m_socket;
 };

 #endif // FTPDATACHANNEL_H