socketserver模块

# 服务端必须满足至少三点:
# 1. 绑定一个固定的ip和port
# 2. 一直对外提供服务,稳定运行
# 3. 能够支持并发
import socketserver

# 自定义类用来处理通信循环
class MyTCPhanler(socketserver.BaseRequestHandler):
    def handle(self):
        while True:
            try:
                data = self.request.recv(1024)
                if len(data) == 0: break  # 针对linux系统
                print(‘-->收到客户端的消息: ‘, data)
                self.request.send(data.upper())
            except ConnectionResetError:
                break

        self.request.close()


if __name__ == ‘__main__‘:
    server=socketserver.ThreadingTCPServer((‘127.0.0.1‘,8081),MyTCPhanler)
    server.serve_forever() # 链接循环

from socket import *

client = socket(AF_INET, SOCK_STREAM)
client.connect((‘127.0.0.1‘, 8081))

# 通信循环
while True:
    msg=input(‘>>: ‘).strip() #msg=‘‘
    if len(msg) == 0:continue
    client.send(msg.encode(‘utf-8‘)) #client.send(b‘‘)
    client.send(‘hello‘.encode(‘utf-8‘)) #client.send(b‘‘)
    print(‘has send‘)
    data=client.recv(1024)
    print(‘has recv‘)
    print(data)

client.close()

或
from socket import *

client = socket(AF_INET, SOCK_STREAM)
client.connect((‘127.0.0.1‘, 8081))

# 通信循环
while True:
    client.send(‘hello‘.encode(‘utf-8‘)) #client.send(b‘‘)
    data=client.recv(1024)
    print(data)

client.close()

import socketserver

class MyUdphandler(socketserver.BaseRequestHandler):
    def handle(self):
        data,sock=self.request
        sock.sendto(data.upper(),self.client_address)

if __name__ == ‘__main__‘:
    server=socketserver.ThreadingUDPServer((‘127.0.0.1‘,8081),MyUdphandler)
    server.serve_forever()

from socket import *

client=socket(AF_INET,SOCK_DGRAM)

while True:
    client.sendto(b‘hello‘,(‘127.0.0.1‘,8081))
    data,server_addr=client.recvfrom(1024)
    print(data)