python实现简单的socket server实例

import socket
host = ''
port = 55555
myServerSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
myServerSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,1)
myServerSocket.bind((host, port))
myServerSocket.listen(1)
print "Server is running on port %d; press Ctrl-C to terminate." % port
while 1:
  clientsock, clientaddr = myServerSocket.accept()
  clientfile = clientsock.makefile('rw', 0)
  clientfile.write("Welcome, " + str(clientaddr) + "\n")
  clientfile.write("Please enter a string: ")
  line = clientfile.readline().strip()
  clientfile.write("You entered %d characters.\n" % len(line))
  clientfile.close()
  clientsock.close()