#! /usr/bin/env python

# 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()