On 2013-02-11 00:48, Ihsan Junaidi Ibrahim wrote:
Hi,
I'm implementing a python client connecting to a C-backend server and am
currently stuck to as to how to proceed with receiving variable-length byte
stream coming in from the server.
I have coded the first 4 bytes (in hexadecimal) of message coming in from the
server to specify the length of the message payload i.e. 0xad{...}
I've managed to receive and translate the message length until I reach my
second recv which I readjusted the buffer size to include the new message
length.
However that failed and recv received 0 bytes. I implemented the same algorithm
on the server side using C and it work so appreciate if you can help me on this.
# receive message length
print 'receiving data'
mlen = sock.recv(4)
try:
nbuf = int(mlen, 16)
except ValueError as e:
print 'invalid length type'
return -1
while True:
buf = sock.recv(nbuf)
if not buf:
break
slen = len(buf)
str = "{0} bytes received: {1}".format(slen, buf)
print str
You should keep reading until you get all need or the connection is
closed:
buf = b''
while len(buf) < nbuf:
chunk = sock.recv(nbuf - len(buf))
if not chunk:
break
buf += chunk
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