Demo/sockets/echosvr.py

   1 #! /usr/bin/env python
   2
   3 # Python implementation of an 'echo' tcp server: echo all data it receives.
   4 #
   5 # This is the simplest possible server, servicing a single request only.
   6
   7 import sys
   8 from socket import *
   9
  10 # The standard echo port isn't very useful, it requires root permissions!
  11 # ECHO_PORT = 7
  12 ECHO_PORT = 50000 + 7
  13 BUFSIZE = 1024
  14
  15 def main():
  16     if len(sys.argv) > 1:
  17         port = int(eval(sys.argv[1]))
  18     else:
  19         port = ECHO_PORT
  20     s = socket(AF_INET, SOCK_STREAM)
  21     s.bind(('', port))
  22     s.listen(1)
  23     conn, (remotehost, remoteport) = s.accept()
  24     print 'connected by', remotehost, remoteport
  25     while 1:
  26         data = conn.recv(BUFSIZE)
  27         if not data:
  28             break
  29         conn.send(data)
  30
  31 main()