cocos creator 网络http请求超时处理

async http_post(url,parme) {
        return new Promise((resolve,reject)=>{
            var xhr = cc.loader.getXMLHttpRequest();
            var time = false;//是否超时
            var timer = setTimeout(function(){
                time = true;
                xhr.abort();//请求中止
                resolve('error');
            },5000);
            xhr.onreadystatechange = function () {                
                if (xhr.readyState === 4 && (xhr.status >= 200 && xhr.status < 300)) {
                    var respone = xhr.responseText;   
                    if(time) return;//请求已经超时，忽略中止请求
                    clearTimeout(timer);//取消等待的超时                 
                    resolve(respone);
            xhr.open("POST", url, true);
            // note: In Internet Explorer, the timeout property may be set only after calling the open()
            // method and before calling the send() method.
            xhr.timeout = 5000;// 5 seconds for timeout
            xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");      
            //let parme = 123;       
            xhr.send(parme);
xhr.ontimeout = function (e) {

// XMLHttpRequest 超时。在此做某事。

console.log('ontimeout')

resolve('error');

在微信小游戏中，不识别。不过在web端可以使用