Transfert of File with QTcpSocket

[Stanfillirenfro]

Dear freinds,

I am facing a problem of transferring a file in a mini chat.
After clicking on the upload buton, I get directory where the file is saved, but I can find file itself.

Here is my code:

void FenClient::sendFile()
{
    QString fileName = QFileDialog::getOpenFileName(this, "Information", "Open a file",
                                                    "File(*.text *.png *.jpeg *.gif)");
    m_file = fileName;
    QFile file(fileName);
 
    if(!file.open(QIODevice::ReadOnly))
    {
        return;
    }
 
    QByteArray paquet = file.readAll();
    QDataStream out(&paquet, QIODevice::WriteOnly);
    out<< (quint32) 0;
    out<< (quint32)(file.size()-sizeof(quint32));
    m_socket->write(paquet);
}

void FenClient::sendFile()
{
    QString fileName = QFileDialog::getOpenFileName(this, "Information", "Open a file",
                                                    "File(*.text *.png *.jpeg *.gif)");
    m_file = fileName;
    QFile file(fileName);

    if(!file.open(QIODevice::ReadOnly))
    {
        return;
    }

    QByteArray paquet = file.readAll();
    QDataStream out(&paquet, QIODevice::WriteOnly);
    out<< (quint32) 0;
    out<< (quint32)(file.size()-sizeof(quint32));
    m_socket->write(paquet);
}

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Could you please tell me what is missing in my code and how to fix the problem?

Many thanks.