Python的简单socket操作

import socket

host = ''
port = 12345

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((host, port))
s.listen(1)

print "Server is running on port %d; press Ctrl-C to terminate." % port

while 1:
    clientsock, clientaddr = s.accept()
    clientfile = clientsock.makefile('rw', 0)
    clientfile.write("Welcome, " + str(clientaddr) + "\n")
    clientfile.write("Please enter a string: ")
    line = clientfile.readline().strip()
    clientfile.write("Hello %s. ^_^ How are you Today! \n" % line)
    clientfile.close()
    clientsock.close()

/// telnet localhost 12345

Welcome, ('127.0.0.1', 3190)
                            Please enter a string: woody
Hello woody. ^_^ How are you Today!


失去了跟主机的连接。

C:\Documents and Settings\Administrator>