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

清疚 2022-09-12 09:49 208阅读 0赞

**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 python
    import socketserver
    from time import ctime
    
    HOST = 'localhost'
    PORT = 2222
    ADDRESS = (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 python
    import socket
    
    HOST = 'localhost'
    PORT = 2222
    ADDRESS = (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  
>

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server，client