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QByteArray b;
        QDataStream out(&b,QIODevice::WriteOnly);
        out.setVersion(QDataStream::Qt_4_4);

        QFile f(fileName);
        f.open(QIODevice::ReadOnly);

        QByteArray data_for_send;
        if (compress)
                data_for_send=qCompress(f.readAll(),compress_level);
        else
                data_for_send=f.readAll();
        f.close();
        out<<qint16(0)<<dbName<<data_for_send;
        out.device()->seek(0);
        out<<qint16(b.size()-sizeof(qint16));
        soc.write(b);