twgray wrote:
On Jul 18, 4:43 pm, Irmen de Jong <irmen.nos...@xs4all.nl> wrote:
twgray wrote:
I am attempting to send a jpeg image file created on an embedded
device over a wifi socket to a Python client running on a Linux pc
(Ubuntu). All works well, except I don't know, on the pc client side,
what the file size is?
You don't. Sockets are just endless streams of bytes. You will have to design
some form
of 'wire protocol' that includes the length of the message that is to be read.
For instance a minimalistic protocol could be the following:
Send 4 bytes that contain the length (an int) then the data itself. The client
reads 4
bytes, decodes it into the integer that tells it the length, and then reads the
correct
amount of bytes from the socket.
Thanks for the reply. But, now I have a newbie Python question. If I
send a 4 byte address from the embedded device, how do I convert that,
in Python, to a 4 byte, or long, number?
If you send the length as 4 bytes then you'll have to decide whether
it's big-endian or little-endian. An alternative is to send the length
as characters, terminated by, say, '\n' or chr(0).
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