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()