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() 32
