On Jul 10, 1:50 pm, Guy Davidson <[EMAIL PROTECTED]> wrote: > Hi Folks, > > I'm having some issues with an small socket based server I'm writing, > and I was hoping I could get some help. > > My code (attached below) us supposed to read an HTTP Post message > coming from a power meter, parse it, and return a proper HTTP 200 Ok > message. The problem is that the socket fails to send the entire > message as one message, creating a fragmented message which the power > meter then fails to read and accept. > > Is there any way to force the socket to send the entire message at > once? Am I doing anything wrong? Is there an easier way to implement > this functionality?
By 'message', do you mean a single IP datagram? In general, the answer is no. Each call to 'connection.send()' will (in general, see the next paragraph) transmit as much data as will fit into a single IP datagram, given the current MTU for the transmission circuit. The fact that you're calling it in a loop indicates that the data being sent may be larger than will fit into a datagram. Or, by 'message', do you mean a single TCP segment? Again, the answer is no. Your network stack will try to make the TCP segments the right size to fit within a single IP datagram, leading to the same result as above. >From your description, I get the feeling that your power meter has a broken network stack, and you're trying to program around it. You need to repair the meter. -- http://mail.python.org/mailman/listinfo/python-list
