ftpdatachannel.cpp Example File

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  #include "ftpdatachannel.h"

  FtpDataChannel::FtpDataChannel(QObject *parent) : QObject(parent)
  {
      connect(&m_server, &QTcpServer::newConnection, this, [this]() {
          m_socket.reset(m_server.nextPendingConnection());
          connect(m_socket.data(), &QTcpSocket::readyRead, [this]() {
              emit dataReceived(m_socket->readAll());
          });
      });
  }

  void FtpDataChannel::listen(const QHostAddress &address)
  {
      m_server.listen(address);
  }

  void FtpDataChannel::sendData(const QByteArray &data)
  {
      if (m_socket)
          m_socket->write(QByteArray(data).replace("\n", "\r\n"));
  }

  void FtpDataChannel::close()
  {
      if (m_socket)
          m_socket->disconnectFromHost();
  }

  QString FtpDataChannel::portspec() const
  {
      // Yes, this is a weird format, but say hello to FTP.
      QString portSpec;
      quint32 ipv4 = m_server.serverAddress().toIPv4Address();
      quint16 port = m_server.serverPort();
      portSpec += QString::number((ipv4 & 0xff000000) >> 24);
      portSpec += ',' + QString::number((ipv4 & 0x00ff0000) >> 16);
      portSpec += ',' + QString::number((ipv4 & 0x0000ff00) >> 8);
      portSpec += ',' + QString::number(ipv4 & 0x000000ff);
      portSpec += ',' + QString::number((port & 0xff00) >> 8);
      portSpec += ',' + QString::number(port &0x00ff);
      return portSpec;
  }