# To test it with netcat, start the script and execute: 
# 
#    echo "Hello, cat." | ncat.exe 127.0.0.1 12345 
# 
import socket 
  
HOST = 'localhost'   # use '' to expose to all networks 
PORT = 12345 
  
def incoming(host, port): 
  """Open specified port and return file-like object""" 
  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
  # set SOL_SOCKET.SO_REUSEADDR=1 to reuse the socket if 
  # needed later without waiting for timeout (after it is 
  # closed, for example) 
  sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
  sock.bind((host, port)) 
  sock.listen(0)   # do not queue connections 
  request, addr = sock.accept() 
  return request.makefile('r', 0) 
# /-- network --- 
  
  
for line in incoming(HOST, PORT): 
  print line,