170925_2 Python socket 创建UDP的服务器端和客户端

【python版本】3.6

UDP服务器端：

 from socket import *
 from time import ctime

 host = ''
 port = 21567
 buf_size = 1024
 addr = (host, port)

 udpSerSock = socket(AF_INET, SOCK_DGRAM)
 udpSerSock.bind(addr)

 while True:
     print("waiting for message...")
     data, ADDR = udpSerSock.recvfrom(buf_size)
     response = '[%s] %s' % (ctime(), data.decode('utf-8'))
     udpSerSock.sendto(response.encode('utf-8'), ADDR)
     print("...received from and returned to:", ADDR)

 udpSerSock.close()

UDP客户端：

 from socket import *

 host = 'localhost'
 port = 21567
 buf_size = 1024
 addr = (host, port)

 udpCliSock = socket(AF_INET, SOCK_DGRAM)

 while True:
     data = input('>')
     if not data:
         break
     udpCliSock.sendto(data.encode('utf-8'), addr)
     data, addr = udpCliSock.recvfrom(buf_size)
     if not data:
         break
     print(data.decode('utf-8'))

 udpCliSock.close()