Python网络编程

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TCP时间戳服务器

在python3中，进行发送的数据都进行encode操作，转化为字符，而输出的部分都进行decode转化为string。

server_tcp

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#!/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 connection...')
    tcpCliSock, addr = tcpSerSock.accept()
    print('...connect from:', addr)

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

    tcpCliSock.close()
tcpSerSock.close()

client_tcp

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#!/usr/bin/env python

from socket import *

HOST = '127.0.0.1'
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)

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

# 用户无输入或者recv()方法调用失败，则跳出

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()

UDP时间戳服务器

server_udp

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#!/usr/bin/env python

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...')
    #接收到的数据和地址
    data, addr = udpSerSock.recvfrom(BUFSIZ)
    response = '[%s] %s' % (bytes(ctime(), 'utf-8').decode('utf-8'), data.decode('utf-8'))
    udpSerSock.sendto(response.encode('utf-8'), addr)
    print('...received from and returned to: ', addr)

udpSerSock.close()

client_udp

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#!/usr/bin/env python

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()