[代码笔记] python 之socket编程(二)

UDP入门:

服务端

#!python
#文件名: demo_server.py

import socket

BUF_SIZE = 1024
server_addr = ('127.0.0.1',8888)

#socket的类型是socket.SOCK_DGRAM(udp使用的)
server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

#服务端照例绑定地址
server.bind(server_addr)

#循环接受客户端发送数据,并将数据发回
while True:
print ("waiting for data")
data,client_addr = server.recvfrom(BUF_SIZE)
print ('Connected by ',client_addr,' Receive data : ',data.decode('utf-8'))
server.sendto(data,client_addr)
server.close()

客户端

#!python
#文件名: demo_client.py

import socket
import struct

BUF_SIZE = 1024
server_addr = ('127.0.0.1',8888)
client = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

#不停的发送数据 ,没发一次尝试接受一次数据并打印
while True:
data =input("Please input some string > ")
client.sendto(data.encode('utf-8'),server_addr)
data,addr = client.recvfrom(BUF_SIZE)
print ("Data : ",data.decode('utf-8'))
client.close()