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#! /usr/bin/env python3
# Python implementation of an 'echo' tcp server: echo all data it receives.
#
# This is the simplest possible server, servicing a single request only.
import sys
from socket import *
# The standard echo port isn't very useful, it requires root permissions!
# ECHO_PORT = 7
ECHO_PORT = 50000 + 7
BUFSIZE = 1024
def main():
if len(sys.argv) > 1:
port = int(eval(sys.argv[1]))
else:
port = ECHO_PORT
s = socket(AF_INET, SOCK_STREAM)
s.bind(('', port))
s.listen(1)
conn, (remotehost, remoteport) = s.accept()
print('connected by', remotehost, remoteport)
while 1:
data = conn.recv(BUFSIZE)
if not data:
break
conn.send(data)
main()
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