python之路----TCP与UDP-白红宇

python之路----TCP与UDP

阅读量：6903 次

发布时间：2019-06-27

本文共 3044 字，大约阅读时间需要 10 分钟。

TCP

import socket#tcp协议sk = socket.socket()     # 买手机 创建一个socket对象sk.bind(('127.0.0.1',8080))  # 给server端绑定一个ip和端口sk.listen()              # py3.4while True:    conn,addr = sk.accept()  # 获取到一个客户端的连接， 已经完成了三次握手建立了一个连接                             # 阻塞    while True:        msg = conn.recv(1024).decode('utf-8')    # 阻塞，直到收到一个客户端发来的消息        print(msg)        if msg == 'bye':break        info = input('>>>')        if info == 'bye':            conn.send(b'bye')            break        conn.send(info.encode('utf-8'))     # 发消息    conn.close()             # 关闭连接sk.close()               # 关闭socket对象，如果不关闭，还能继续接收# server client1 建立了长连接# client2

server

import socketsk = socket.socket()sk.connect(('127.0.0.1',8080))while True:    msg = input('>>>')    if msg == 'bye':        sk.send(b'bye')        break    sk.send(msg.encode('utf-8'))    ret = sk.recv(1024).decode('utf-8')    if ret == 'bye':break    print(ret)sk.close()

client

import socketsk = socket.socket()sk.connect(('127.0.0.1',8080))while True:    msg = input('client2:>>>')    if msg == 'bye':        sk.send(b'bye')        break    sk.send(('client2 :'+msg).encode('utf-8'))    ret = sk.recv(1024).decode('utf-8')    if ret == 'bye':break    print(ret)sk.close()

client2

UDP

import socketsk = socket.socket(type=socket.SOCK_DGRAM)  #DGRAM datagramsk.bind(('127.0.0.1',8080))       #只有服务端有的msg,addr = sk.recvfrom(1024)print(msg.decode('utf-8'))sk.sendto(b'bye',addr)sk.close()

server

import socketsk = socket.socket(type=socket.SOCK_DGRAM)ip_port = ('127.0.0.1',8080)sk.sendto(b'hello',ip_port)ret,addr = sk.recvfrom(1024)print(ret.decode('utf-8'))sk.close()

client

UDP协议实现qq聊天

import socketsk = socket.socket(type=socket.SOCK_DGRAM)sk.bind(('127.0.0.1',8080))while True:    msg,addr = sk.recvfrom(1024)    print(addr)    print(msg.decode('utf-8'))    info = input('>>>').encode('utf-8')    sk.sendto(info,addr)sk.close()

server

import socketsk = socket.socket(type=socket.SOCK_DGRAM)ip_port = ('127.0.0.1',8080)while True:    info = input('tiger ：')    info = ('\033[34m来自tiger的消息 ：%s\033[0m'%info).encode('utf-8')    sk.sendto(info,ip_port)    msg,addr = sk.recvfrom(1024)    print(msg.decode('utf-8'))sk.close()

client1

import socketsk = socket.socket(type=socket.SOCK_DGRAM)ip_port = ('127.0.0.1',8080)while True:    info = input('二哥 ：')    info = ('\033[32m来自二哥的消息 ：%s\033[0m'%info).encode('utf-8')    sk.sendto(info,ip_port)    msg,addr = sk.recvfrom(1024)    print(msg.decode('utf-8'))sk.close()

client2

UDP实现系统时间同步

# 提供服务

# 接收信息时间的格式

# 将我的时间转换成接受到的格式

# 发回给客户端

import timeimport socketsk = socket.socket(type=socket.SOCK_DGRAM)sk.bind(('127.0.0.1',8090))while True:    strf,addr = sk.recvfrom(1024)    strf = strf.decode('utf-8')    res = time.strftime(strf).encode('utf-8')    sk.sendto(res,addr)sk.close()

server

import socketsk = socket.socket(type=socket.SOCK_DGRAM)addr = ('127.0.0.1',8090)info = input('>>>').encode('utf-8')sk.sendto(info,addr)ret,addr = sk.recvfrom(1024)print(ret.decode('utf-8'))sk.close()

client

转载于:https://www.cnblogs.com/TheLand/p/8360093.html

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