如何在CocosCreator中使用http和WebSocket

//访问地址
let url = "http://127.0.0.1:3000/?url=123&name=321";
//新建Http
let xhr = new XMLHttpRequest();
//接收数据
xhr.onreadystatechange = function () {
    if (xhr.readyState == 4 && (xhr.status >= 200 && xhr.status < 400)) {
        var response = xhr.responseText;
        console.log(response);
    }
};
//错误处理
xhr.onerror = function(evt){
    console.log(evt);
}
//初始化一个请求，GET方式，true异步请求
xhr.open("GET", url, true);
//发送请求
xhr.send();

var app = require('express')(); 
var http = require('http').Server(app);  
 
 
app.get('/', function(req, res){ 
    //设置允许跨域的域名，*代表允许任意域名跨域
    res.header("Access-Control-Allow-Origin","*");
    //允许的header类型
    res.header("Access-Control-Allow-Headers","content-type");
    //跨域允许的请求方式
    res.header("Access-Control-Allow-Methods","DELETE,PUT,POST,GET,OPTIONS");
    res.send(req.query.name); 
}); 
   
http.listen(3000, function(){ 
    console.log('listening on *:3000'); 
});

console.log(response);   //输出为321

let url = "http://127.0.0.1:3000/";
let xhr = new XMLHttpRequest();
 
xhr.onreadystatechange = function () {
    if (xhr.readyState == 4 && (xhr.status >= 200 && xhr.status < 400)) {
        var response = xhr.responseText;
        console.log(response);
    }
};
xhr.onerror = function(evt){
    console.log(evt);
}
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/x-www-fORM-urlencoded");
xhr.send("name=123");

var app = require('express')(); 
var http = require('http').Server(app);  
var querystring = require('querystring');
 
 
app.post('/', function(req, res){ 
    //设置允许跨域的域名，*代表允许任意域名跨域
    res.header("Access-Control-Allow-Origin","*");
    //允许的header类型
    res.header("Access-Control-Allow-Headers","content-type");
    //跨域允许的请求方式
    res.header("Access-Control-Allow-Methods","DELETE,PUT,POST,GET,OPTIONS");
     
    var body = "";
     
    req.on('data', function (chunk) {
        body += chunk;  //一定要使用+=，如果body=chunk，因为请求favicon.ico，body会等于{}
        console.log("chunk:",chunk);
    });
     
    req.on('end', function () {
        body = querystring.parse(body);
        console.log("body:",body);
        res.send(body.name);
    });
}); 
   
http.listen(3000, function(){ 
    console.log('listening on *:3000'); 
});

console.log(response);  //输出123

let ws = new WebSocket("ws://127.0.0.1:8001");
ws.onopen = function (event) {
    console.log("Send Text WS was opened.");
};
ws.onmessage = function (event) {
    console.log("response text msg: " + event.data);
};
ws.onerror = function (event) {
    console.log("Send Text fired an error");
};
ws.onclose = function (event) {
    console.log("WebSocket instance closed.");
};
 
setTimeout(function () {
    if (ws.readyState === WebSocket.OPEN) {
        console.log("WebSocket start send message.");
        ws.send("Hello WebSocket, I'm a text message.");
    }
    else {
        console.log("WebSocket instance wasn't ready...");
    }
}, 3000);

var ws = require("nodejs-websocket");
  
console.log("开始创建websocket");
var server = ws.createServer(function(conn){
    console.log("连接成功");
    conn.on("text", function (obj) {
       console.log("接收:",obj);
        conn.send("message come from server");     
          
    })
    conn.on("close", function (code, reason) {
        console.log("关闭连接")
    });
    conn.on("error", function (code, reason) {
        console.log("异常关闭")
    });
}).listen(8001)
console.log("开始创建websocket完毕");