websocket 初步使用经验（python）

• 想实现网页前端和后端的数据同步交互，就有必要使用 websocket 的方式进行通信。

• python websocket github 地址：[email protected]:Aplexchenfl/python-websocket-server.git

• 下载之后：

    ECM_5412@chenfl:/var/www/html$ ls
    client.html  README.md  server.py  setup.py  tests  websocket_server

• 其中，服务端的代码如下：

    vim server.py

    from websocket_server import WebsocketServer                                    
     // 当新的客户端连接时会提示                                                                        
    # Called for every client connecting (after handshake)                          
    def new_client(client, server):                                                 
            print("New client connected and was given id %d" % client['id'])        
            server.send_message_to_all("Hey all, a new client has joined us")          
                                                                                
     // 当旧的客户端离开                                                                         
    # Called for every client disconnecting                                         
    def client_left(client, server):                                                
            print("Client(%d) disconnected" % client['id'])                         
                                                                                
    // 接收客户端的信息。                                                                             
    # Called when a client sends a message                                          
    def message_received(client, server, message):                                  
            if len(message) > 200:                                                  
                    message = message[:200]+'..'                                    
            print("Client(%d) said: %s" % (client['id'], message))                  
                                                                                
                                                                                
    PORT=9001                                                                       
    server = WebsocketServer(PORT, "0.0.0.0")                                       
    server.set_fn_new_client(new_client)                                            
    server.set_fn_client_left(client_left)                                          
    server.set_fn_message_received(message_received)                                
    server.run_forever()

    // 通过 python3  启动这个客户端
    python3  server.py

• 客户端代码如下：

                                                                          
                                                                          
                                                    
                                                                                
                                                                       
                                                                         
                                                         
    
                                 
                                                  
                                              
        close          
    
                                                                     
    
                                                        
                                                                         
                             

    //  通过网页启动客户端。