QFile Read Binary blockwise

[J.Hilk]

Hello everyone,

I'm trying to send files via a TcpSocket connection.
Client and server programs are so far finished.
I can send text-files of any size without problem, that part works fine.

But I get unreadable files if it is any other file-format like png/bmp or a sqlitedb is transfered.
So, I'm guessing, I don't read the file correctly?

Reading and writing basicly breaks done to this:

//Reading the File

qint64 qiSend;
int iSend = 65525; //2 byte int = 0 - 65 535 //10 Byte For tcp-header
char readData[65525];
...
qiSend = file.read(readData,iSend);

//Writing to file
QByteArray baWrite;

...

if(writeFile.isOpen()){
            bytesWritten =writeFile.write(baWrite);
            if(bytesWritten != baWrite.size())
                qDebug() << "could not write all bytes" << bytesWritten << "of" << baWrite.size();
}

Anyone an idea, what I'm doing wrong?

[J.Hilk]

Never mind,
@tobias-hunger in this thread 6 years ago is right.

I changed:

qiSend = file.read(readData,iSend);

to

QByteArray b = file.read(iSend);

And now I'm getting all needed bytes.