var child_process = require('child_process');var ws = require("nodejs-websocket");console.log("initialing conn...")var server = ws.createServer(function(conn){    conn.on("text", function (str) {    var arr=str.split(" ");    var comm=arr.shift();        console.log("received:"+str);    aa(comm,arr,conn);   });    conn.on("error", function (code, reason) {        console.log("异常关闭")    });}).listen(8002)function aa(comm,arr,conn){     var spawnObj = child_process.spawn(comm,arr, {encoding: 'utf-8'});                spawnObj.stdout.on('data', function(chunk) {              conn.sendText(chunk.toString( ));        });        spawnObj.stderr.on('data',(data)=>{                         console.log('error:${data}');        });        spawnObj.on('error',(err)=>{                console.log('subProcess Failed'+err);        });}console.log("WebSocket建立完毕")