JavaScript连接WebSocketvar ws = new WebSocket("ws://127.0.0.1:12345");var msg = "websocket test"; var debug_flag = true; ws.onopen= function () { ws.send(msg); if(debug_flag)console.info("send:"); ws.onmessage = function (event) { var ret_str=event.data; //假设返回值为空表示获取数据失败 if(re