QFtp Resume Upload

[Goldmmbr]

Hi, i need to implement a ftp client that has a resume upload feature using QFtp.

I have tried implementing the resume function using raw commands ... something like the following:

ftp->rawCommand("TYPE I");
ftp->rawCommand("PASV");
ftp->rawCommand("REST" + x); //where x is the string with the position ...
ftp->rawCommand("STOR" + remoteFileName);

ftp->rawCommand("TYPE I");
ftp->rawCommand("PASV");
ftp->rawCommand("REST" + x); //where x is the string with the position ...
ftp->rawCommand("STOR" + remoteFileName);

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however i am getting the following error:

425 :: "Can't open data connection."

I have looked over the QFtp sourcefile and i saw that the ftp data channel isn't opened when using raw commands.
I have tried opening a data channel using a QTcpSocket like this :

void FtpClass::onRawCmdReply(int replyCode, const QString & detail )
{
    qDebug() << replyCode << " :: " << detail;
 
    if (replyCode == 227)  // detail = Entering Passive Mode (a1,a2,a3,a4,p1,p2)
                                     // host = a1.a2.a3.a4
                                     // port = p1*256 + p2
    {
        QRegExp addrPortPattern(QLatin1String("(\\d+),(\\d+),(\\d+),(\\d+),(\\d+),(\\d+)"));
        if (addrPortPattern.indexIn(detail) == -1)
        {
            {
                qDebug("QFtp: bad 227 response -- address and port information missing");
            }
        }
        else
        {
            _dataSocket = new QTcpSocket(this);
            QStringList lst = addrPortPattern.capturedTexts();
            QString host = lst[1] + QLatin1Char('.') + lst[2] + QLatin1Char('.') + lst[3] + QLatin1Char('.') + lst[4];
            quint16 port = (lst[5].toUInt() << 8) + lst[6].toUInt();
            _dataSocket->connectToHost(host, port);
            if (!_dataSocket->waitForConnected(1000))
            {
                qDebug() << "cannot connect to: " << host << "port :" << port;
            }
            else
            {
                qDebug() << "connected to: " << host << "port :" << port;
            }
        }
    }
}

void FtpClass::onRawCmdReply(int replyCode, const QString & detail )
{
    qDebug() << replyCode << " :: " << detail;

    if (replyCode == 227)  // detail = Entering Passive Mode (a1,a2,a3,a4,p1,p2)
                                     // host = a1.a2.a3.a4
                                     // port = p1*256 + p2
    {
        QRegExp addrPortPattern(QLatin1String("(\\d+),(\\d+),(\\d+),(\\d+),(\\d+),(\\d+)"));
        if (addrPortPattern.indexIn(detail) == -1)
        {
            {
                qDebug("QFtp: bad 227 response -- address and port information missing");
            }
        }
        else
        {
            _dataSocket = new QTcpSocket(this);
            QStringList lst = addrPortPattern.capturedTexts();
            QString host = lst[1] + QLatin1Char('.') + lst[2] + QLatin1Char('.') + lst[3] + QLatin1Char('.') + lst[4];
            quint16 port = (lst[5].toUInt() << 8) + lst[6].toUInt();
            _dataSocket->connectToHost(host, port);
            if (!_dataSocket->waitForConnected(1000))
            {
                qDebug() << "cannot connect to: " << host << "port :" << port;
            }
            else
            {
                qDebug() << "connected to: " << host << "port :" << port;
            }
        }
    }
}

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But if i do that i get the following error :

426 :: "Connection closed; transfer aborted."

It is not a server issue since i've tested using a random ftp client and the server supports resuming.
Also it is not a firewall issue since i dissabled the firewalls on both machines.

What am i doing wrong ? can someone help me please?

[Sahab]

no one suggestion??((