SocketServer class - basis problem
peter at engcorp.com
Tue Jun 24 15:42:53 CEST 2003
Miki Tebeka wrote:
> Hello, Leonard,
> > data = s.recv(1024)
> > s.close()
> > print 'Received', data
> > Why does s.recv() hang the client? It seems like server is not
> > handing back "blah", but I'm sure it is.....
> I think that the socket buffer is not full (since you are waiting for
> 1024 and "blah" is not enough).
This is not how the size parameter to recv() is used. It is a
*maximum*, meaning any amount of data from zero bytes (if the
socket is closed) to that value will be returned, with *no*
guarantees how much is actually returned. Often, but absolutely
not always, you will get a whole "line" and newbies will be
deceived into thinking it's enough just to recv(1024) and
carry on, but eventually such code will fail.
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