sys.exit()
print 'Socket bind complete'
#Start listening on socket
s.listen(10)
print 'Socket now listening'
#Function for handling connections. This will be used to create threads
def clientthread(conn):
#Sending message to connected client
conn.send('Welcome to the server. Type something and hit entern') #send only takes string
#infinite loop so that function do not terminate and thread do not end.
while True:
#Receiving from client
data = conn.recv(1024)
reply = 'OK...' + data
if not data:
break
conn.sendall(reply)
#came out of loop
conn.close()
#now keep talking with the client
while 1:
#wait to accept a connection - blocking call
conn, addr = s.accept()
print 'Connected with ' + addr[0] + ':' + str(addr[1])
#start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
start_new_thread(clientthread ,(conn,))
s.close()
运行上述服务端程序，然后像之前一样打开三个终端窗口并执行 telent 命令：
$ telnet localhost 8888
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Welcome to the server. Type something and hit enter
hi
OK...hi
asd
OK...asd
cv
OK...cv
服务器端所在终端窗口输出信息如下：
$ python server.py
Socket created
Socket bind complete
Socket now listening
Connected with 127.0.0.1:60730
Connected with 127.0.0.1:60731
线程接管了连接并返回相应数据给客户端。
这便是我们所要介绍的服务器端编程。
结论
到这里为止，你已经学习了 Python 的 Socket 基本编程，你可自己动手编写一些例子来强化这些知识。
你可能会遇见一些问题：Bind failed. Error Code : 98 Message Address already in use，碰见这种问题只需要简单更改服务器端口即可。
