Russian Qt Forum

class NetworkServer : public QObject
{
    Q_OBJECT
...
private:
...
    QTcpServer *server;
    QList<QTcpSocket*>connections;

private:
    void sendFileToClient(int socketIndex);

public slots:
    void on_newConnection();
    void on_recieveCommand();
};

void NetworkServer::on_newConnection()
{
    QTcpSocket *socket = server->nextPendingConnection();
    connect(socket, SIGNAL(readyRead()),
            this, SLOT(on_recieveCommand()));
    connections.push_back(socket);    
    emit newConnection(socket->peerAddress().toString());
}

void NetworkServer::on_recieveCommand()
{
    QTcpSocket *socket = qobject_cast<QTcpSocket*>(sender());
    if (socket == 0)
        return;
    sendFileToClient(connections.indexOf(socket));
}

void NetworkServer::sendFileToClient(int socketIndex)
{
    QTcpSocket *sock = connections[socketIndex];
    QByteArray outBuf;
    QDataStream out(&outBuf, QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_4_6);
    QFile file(m_SendingFileName);
    file.open(QIODevice::ReadOnly);
    quint32 fileSize = file.size();
    out<<fileSize;
    out<<file.readAll();
    sock->write(outBuf);
    sock->flush();
    sock->close();
    connections.removeAt(socketIndex);
}