Python网络编程（七）-标准库socketserver开发服务端，客户端网络应用

1. socketserver简介：

python3提供了标准库socketserver，用于创建服务端，客户端网络程序。它对socket进行了封装，用起来更加方便，简单。

2.举例：一个简单的C/S架构程序：

程序清单：

socketserver端：my_socketserver_s.py

#!/usr/bin/env pythonimport socketserverfrom time import ctimeHOST = 'localhost'PORT = 2222ADDRESS = (HOST, PORT)class RequestTCPHandler(socketserver.BaseRequestHandler):    def handle(self): print('...connected from:', self.client_address) try:     while True:  self.data = self.request.recv(1024)  print("send:".format(self.client_address), self.data, ctime())  if not self.data:      print("connection fail")      break  self.request.sendall(self.data) except Exception as e:     print(self.client_address, "disconnection") finally:     self.request.close()    def setup(self): print("create connection：", self.client_address)    def finish(self): print("finish!")if __name__ == "__main__":    print('socket server main begin...')    server = socketserver.TCPServer(ADDRESS, RequestTCPHandler)    server.serve_forever()

RequestTCPHandler用于接受客户端发送过来的请求，并且进行处理。用request.sendall进行数据的发送。

创建一个TCPServer，其中，第一个参数是ip地址，第二个参数时RequestTCPHandler的实例。

客户端程序：my_socketserver_c.py

#!/usr/bin/env pythonimport socketHOST = 'localhost'PORT = 2222ADDRESS = (HOST, PORT)def connect(address):    print('socket client main begin...')    myClient = socket.socket()    myClient.connect(address)    while True: cmd = input("(q退出)%").strip() if len(cmd) == 0:     continue if cmd == "q":     break myClient.send(cmd.encode()) res = myClient.recv(1024) print(res.decode())    myClient.close()if __name__ == "__main__":    print('socket client main begin...')    connect(ADDRESS)

标准的socket客户端程序：

创建socket->建立连接->send->recv,

当输入q时，结束程序。

运行结果如下：

socketserver端运行结果：

socket server main begin...
create connection： ('127.0.0.1', 52653)
...connected from: ('127.0.0.1', 52653)
send: b'abc' Thu Sep 23 11:10:00 2021
send: b'12345' Thu Sep 23 11:10:02 2021
send: b'' Thu Sep 23 11:10:04 2021
connection fail
finish!

client端运行结果：

python mysocket_server_c.py
socket client main begin...
socket client main begin...
(q退出)%abc
abc
(q退出)%12345
12345
(q退出)%q

Process finished with exit code 0
 

server，client