问使用node js进行web抓取页表时面临的问题

EN

    var express = require('express');
var fs = require('fs');
var request = require('request');
var cheerio = require('cheerio');
var app = express();

app.get('/scrape', function(req, res) {

    url = 'https://www.g2a.com/rising-storm-2-vietnam-steam-cd-key-global.html';

    request(url, function(error, response, body) {
        if (!error) {
            var $ = cheerio.load(body);
            var arr = [];
            var title = $('.mp-user-rating tr td').each(function(element) {
                var tableData = $(element).find('.mp-rating-popup');
                arr.push({ 'title': tableData.text() });
            });
            console.log(arr);
        }
        res.send(arr);

    });
})
app.listen('8081');

console.log('Magic happens on port 8081');

exports = module.exports = app;