sending a file(txt,docs,exe,rar,zip...) through QTcpSocket

Hello friends,
Im really knew to this forum,
i have been trying to write a Qt c++ code for transferring files from client to server over a QTcpServer
i have done some long work and different functions for the whole program including the GUI
but now i wanna implement the download button, where the client has a list of the server files , upon double clicking the client will
download the file from server to his PC.
i tried several ways but non is working out for me
i know i should read the file into chunks and feed the socket the chunk while looping till there is no bytes available
can anyone help
give me a sample code of this or another way or any clue
Thanks in advance.

Both QFile and QTcpSocket are subclasses of QIODevice, so transferring bytes from the file to the socket is only a matter of finding matching read and write functions.

For example there is QIODevice::read( qint64 ) which returns a block of data as a QByteArray. The matching write function is QIODevice::write( QByteArray ) which takes such a data block and writes it.

Now one thing to consider of course is that the socket needs to transfer data to an "endpoint" that can be considerably slower than a file.
In a situation with blocking I/O one could call QIODevice::waitForBytesWritten() after each write, making sure the data has been sent before calling read() on the file again.
In a situation with non-blocking I/O one would connect to the QIODevice::bytesWritten( int ) signal and only attempt another read/write cycle when all or most data from the previous write has been sent.

Cheers,
_

Thanks for your reply Admin anda_skoa.
im not really familiar with QIODevice, may you please show me a sample code that is supposed to send a file of any type to a server ?
That would be really helpful and ill take a look at the qt reference documentation of QIODevice class to well understand it
Thanks again,

there are plenty of network examples on the the digia help site.