python3 socket tcp/udp 时间服务器

最新推荐文章于 2023-06-26 14:44:40 发布

原创最新推荐文章于 2023-06-26 14:44:40 发布 · 289 阅读

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#python3 #socket #tcp #udp

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本文详细介绍了TCP和UDP两种网络通信协议下服务器与客户端的编程实现，包括Python代码示例，展示了如何建立连接、发送与接收数据，并对程序进行了改进以支持参数输入。

tcp服务器程序

#!/usr/bin/env python3

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("... connected from:", addr)

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

tcp客户端程序

#!/usr/bin/env python3

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(bytes(data, 'utf-8'))
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
                break
        print(data.decode('utf-8'))

tcpCliSock.close()

udp服务器程序

#!/usr/bin/env python3

from time import ctime
from socket import *

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)
        udpSerSock.sendto((bytes(('[%s] ' % ctime()), 'utf-8') + data), addr)
        print("...received from and returned to:", addr)

udpSerSock.close()

udp客户端程序

#!/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(bytes(data, 'utf-8'), ADDR)
        data, ADDR = udpCliSock.recvfrom(BUFSIZ)
        if not data:
                break
        print(data.decode('utf-8'))
udpCliSock.close()

tcp服务器与客户端程序改进：若用户运行程序时指定了ip地址和端口，则使用指定的参数；若没指定，则使用默认参数
tcp服务器程序

#!/usr/bin/env python3

from socket import *
from time import ctime
import sys

if len(sys.argv) ==3:
        HOST = sys.argv[1]
        PORT = int(sys.argv[2])
else:
        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("... connected from:", addr)

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

tcp客户端程序

#!/usr/bin/env python3

from socket import *
import sys

if len(sys.argv) == 3:
        HOST = sys.argv[1]
        PORT = int(sys.argv[2])
else:
        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(bytes(data, 'utf-8'))
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
                break
        print(data.decode('utf-8'))

tcpCliSock.close()