python中的TCP及UDP

ss = socket() # 创建服务器套接字
ss.bind() # 套接字与地址绑定
ss.listen() # 监听连接
inf_loop: # 服务器无限循环
    cs = ss.accept() # 接受客户端连接
    comm_loop: # 通信循环
        cs.recv()/cs.send() # 对话（接收/发送）
    cs.close() # 关闭客户端套接字
ss.close() # 关闭服务器套接字#（可选）

import socket
from time import ctime

HOST = ‘‘
PORT = 8099
BUFSIZE = 1024
ADDR = (HOST, PORT)
tcpSerSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)
while True:
    print("等待连接......")
    tcpCliSock, addr = tcpSerSock.accept()
    print("...接收到连接：", addr)
    while True:
        data = tcpSerSock.recv(BUFSIZE)
        if not data:
            break
        tcpCliSock.send(‘[%s] %s‘ % (bytes(ctime(), ‘utf-8‘), data))
    tcpCliSock.close()
tcpSerSock.close()

cs = socket()  # 创建客户端套接字
cs.connect()  # 尝试连接服务器
comm_loop:  # 通信循环
    cs.send() / cs.recv()  # 对话（发送/接收）
cs.close()  # 关闭客户端套接字

import socket

HOST = ‘localhost‘
PORT = 8099
BUFSIZE = 1024
ADDR = (HOST, PORT)

tcpCliSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcpCliSock.connect(ADDR)
while True:
    data = input("> ")
    if not data:
        break
    tcpCliSock.send(data)
    data = tcpCliSock.recv(BUFSIZE)
    if not data:
        break
    print(data)
tcpCliSock.close()

ss = socket() # 创建服务器套接字
ss.bind() # 绑定服务器套接字
inf_loop: # 服务器无限循环
    cs = ss.recvfrom()/ss.sendto() # 关闭（接收/发送）
ss.close() # 关闭服务器套接字

import socket
from time import ctime

HOST = ‘‘
PORT = 8099
BUFSIZE = 1024
ADDR = (HOST, PORT)
udpSerSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udpSerSock.bind(ADDR)
while True:
    print("等待连接......")
    data, addr = udpSerSock.recvfrom(BUFSIZE)
    udpSerSock.sendto(‘[%s] %s‘ % (ctime(), data), addr)
    print("...接收到连接：", addr)
udpSerSock.close()

cs = socket()  # 创建客户端套接字
comm_loop:  # 通信循环
    cs.sendto() / cs.recvfrom()  # 对话（发送/接收）
cs.close()  # 关闭客户端套接字

import socket

HOST = ‘localhost‘
PORT = 8099
BUFSIZE = 1024
ADDR = (HOST, PORT)

udpCliSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udpCliSock.connect(ADDR)
while True:
    data = input("> ")
    if not data:
        break
    udpCliSock.sendto(data, ADDR)
    data, ADDR = udpCliSock.recvfrom(BUFSIZE)
    if not data:
        break
    print(data)
udpCliSock.close()