Python3编写TCP、UDP客户端和服务器

今日学习Python，学习书本叫《Python核心编程(第三版)》！

按照书本的代码编写，发现TCP和UDP的客户端都无法正确显示信息，根据错误提示，在网上搜集了原因，不敢独享，并在此备案

参考：https://stackoverflow.com/questions/13274553/python-3-3-socket-typeerror

原因是Python3.1之后的改动，

Python3 TCP时间戳服务器端代码

#!/usr/bin/env python

from socket import *
from time import ctime

HOST = ''
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST,PORT)

tcpSerSock = socket(AF_INET,SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

while True:
    print('waiting for connecting...')
    tcpCliSock, addr = tcpSerSock.accept()
    print('...connect from:',addr)

    while True:
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
            break
        response = '[%s] %s' % (ctime(), data.decode('utf-8'))
        tcpCliSock.send(response.encode('utf-8'))

    tcpCliSock.close()
tcpSerSock.close()
           

Python3 TCP时间戳服客户端代码

#!/usr/bin/env python

from socket import *

HOST = 'localhost'
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST,PORT)

tcpCliSock = socket(AF_INET,SOCK_STREAM)
tcpCliSock.connect(ADDR)

while True:
    data = input('> ')
    if not data:
        break
    tcpCliSock.send(data.encode('utf-8'))
    data = tcpCliSock.recv(BUFSIZ)
    if not data:
        break
    print(data.decode('utf-8'))

tcpCliSock.close()
           

TCP服务器端运行图

TCP客户端运行图



Python3 UDP时间戳服务器端代码

#!/usr/bin/env python3

from socket import *
from time import ctime

HOST = ''
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST,PORT)

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

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

udpSerSock.close()
           

Python3 UDP时间戳服客户端代码

#!/usr/bin/env python3

from socket import *

HOST = 'localhost'
PORT = 21567
BUFSIZ = 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(BUFSIZ)
    if not data:
        break
    print(data.decode('utf-8'))

udpCliSock.close()
           

UDP服务器端运行图

UDP客户端运行图

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原文链接：https://blog.csdn.net/weixin_34313182/article/details/92785461