udp示例

 

server:

# -*- coding:gb2312 -*-
import socket
import time
import struct
if __name__ == "__main__":
    s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
    host=''
    port=12345
    s.bind((host,port))   
    while 1:
        print("wait***")
        message,address=s.recvfrom(1024)
        message=bytes.decode(message)
        if message != 'time':
            print("message error")
            continue
        secs=time.ctime()
        reply=str.encode(secs)
        s.sendto(reply,address)
        print("succeed")

client:

# -*- coding=gb2312 -*-
import socket
if __name__ == "__main__":
    s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
    address=('127.0.0.1',12345)
    s.connect(address)
    data=b'time'
    s.sendall(data)
    buf,address=s.recvfrom(1024)
    buf=bytes.decode(buf)
    print(buf)
    print(address)