py知识(每日更新) 7.18

UDP协议的socket

pdu协议:不可靠,相对来说不安全的协议,面向数据报(无连接)的协议,效率高,速度快.

# client
import socket

udp_client = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  # 基于网络,udp协议的socket
while 1:
    to_server_data = input('>>>').strip()
    udp_client.sendto(to_server_data.encode('utf-8'),('127.0.0.1', 9000))
    from_server_data = udp_client.recvfrom(1024)
    print(f'来自{from_server_data[1]}的消息:{from_server_data[0].decode("utf-8")}')

# server
import socket

udp_server = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  # 基于网络,udp协议的socket

udp_server.bind(('127.0.0.1', 9000))

while 1:
    from_client_data = udp_server.recvfrom(1024)
    print(f'来自{from_client_data[1]}的消息:{from_client_data[0].decode("utf-8")}')
    to_client_data = input('>>>').strip()
    udp_server.sendto(to_client_data.encode('utf-8'),from_client_data[1])

# udp不会产生粘包的现象 并且默认支持一对多(串行)

网络并发

# server
import socketserver

class MyServer(socketserver.BaseRequestHandler): # 继承的类固定的

    def handle(self):  # 必须是这个handle名字.
        while 1:
            from_client_data = self.request.recv(1024).decode('utf-8')  # self.request == conn管道
            print(from_client_data)
            to_client_data = input('>>>').strip()
            self.request.send(to_client_data.encode('utf-8'))

if __name__ == '__main__':

    ip_port = ('127.0.0.1',8848)
    server = socketserver.ThreadingTCPServer(ip_port,MyServer)
    # server.allow_reuse_address = True
    # print(socketserver.ThreadingTCPServer.mro())
    # [ThreadingTCPServer, ThreadingMixIn,TCPServer, BaseServer]
    server.serve_forever()

# client
import socket

# 1. 创建socket对象(买手机)
phone = socket.socket() # 可以默认不写

# 连接服务器ip地址与端口
phone.connect(('127.0.0.1', 8848))

# 发消息
while 1:
    content = input('>>>').strip()

    phone.send(f'MC阿强:{content}'.encode('utf-8'))
    # 接收消息
    from_server_data = phone.recv(1024)  # 夯住,等待服务端的数据传过来
    print(f'来自服务端消息:{from_server_data.decode("utf-8")}')

# 关机
phone.close()