watch12306/lib/util/promiseUtil.js

检测12306网站，并在有余票时候通知

'use strict';
module.exports = {
    timeoutPromise: (t, promise) => {
        t = parseInt(t) || 0;//默认不设限制
        return new Promise((resolve, reject) => {
            let toutId = !t ? false : setTimeout(function(){
                reject(new Error(`promise timeout with ${t}ms.`));
            }, t);
            promise.then(
                (res) => {
                    toutId && clearTimeout(toutId);
                    resolve(res);
                },
                (err) => {
                    toutId && clearTimeout(toutId);
                    reject(err);
                }
            );
        });
    }
};