UDP socket-based protocol module + socketserver

UDP socket-based protocol

user datagram protocal Datagram Protocol

No two-way channel, comes header, similar to text messaging, will not stick package

Unreliable: When data is sent, it lost lost

UDP socket:

Server:

import socket
server = socket.socket(type=socket.SOCK_DGRAM)  # UDP协议
server.bind(('127.0.0.1', 8080))

# 无半连接池概念，不需要listen
# 无双向通道，直接通信循环

while True:
    data, addr = server.recvfrom(1024) # 直接接受客户端消息
    print(data)
    print(addr)

    server.sendto(data.decode('utf-8').upper().enco

Client:

import socket
client = socket.socket(type=socket.SOCK_DGRAM)
# 无双向通道，不需要连接，直接进入通信循环
server_address = ('127.0.0.1', 8080)
while True:
    data = input('>>>').strip()
    client.sendto(data.encode('utf-8'), server_address)
    server_data, server_addr = client.recvfrom(1024)
    print(server_data)
    print(server_addr)

Application: Simple version of qq

Server:

import socket

server = socket.socket(type=socket.SOCK_DGRAM)
server.bind(('127.0.0.1', 8080))

while True:
    data, addr = server.recvfrom(1024)
    print('你收到了一条消息：{0}'.format(data.decode('utf-8')))
    msg = input('回信：>>>').strip()
    server.sendto(msg.encode('utf-8'), addr)

Client:

import socket
client = socket.socket(type=socket.SOCK_DGRAM)

server_address = ('127.0.0.1', 8080,)
while True:
    msg = input('输入你发送的消息>>>').strip()
    client.sendto(msg.encode('utf-8'), server_address)
    data, addr = client.recvfrom(1024)
    print('服务器回信：{0}'.format(data.decode('utf-8')))

socketserver module

Create a socket based TCP protocol:

Server

import socketserver

class MyServer(socketserver.BaseRequestHandler):
    def handle(self):
        print('服务端的handler')
        while True:
            data = self.request.recv(1024)
            print(self.client_address)
            print(data)
            self.request.send(data.upper())


if __name__ == '__main__':
    # 只要有客户端连接，就会自动交给handler类中的handle处理
    server = socketserver.ThreadingTCPServer(('127.0.0.1', 8000), MyServer)  #创建一个基于TCP的对象
    server.serve_forever() # 启动该服务对象

Client:

import socket

client = socket.socket()
client.connect(('127.0.0.1', 8000))

while True:
    msg = input('>>>').strip()
    client.send(msg.encode('utf-8'))
    data = client.recv(1024)
    print('客户端收到的数据',data)

Created based on UDP sockets

Server:

import socketserver


class MyServer(socketserver.BaseRequestHandler):
    def handle(self):
        # print('来啦 老弟')
        while True:
            data,sock = self.request
            print(self.client_address)  # 客户端地址
            print(data.decode('utf-8'))
            sock.sendto(data.upper(),self.client_address)


if __name__ == '__main__':
    """只要有客户端连接  会自动交给自定义类中的handle方法去处理"""
    server = socketserver.ThreadingUDPServer(('127.0.0.1',8080),MyServer)  # 创建一个基于TCP的对象
    server.serve_forever()  # 启动该服务对象

Client:

import socket
import time

client = socket.socket(type=socket.SOCK_DGRAM)
server_address = ('127.0.0.1',8080)

while True:
    client.sendto(b'hello',server_address)
    data,addr = client.recvfrom(1024)
    print(data.decode('utf-8'),addr)
    time.sleep(1)