Check the price of Ctrip tourism product

check_ctrip_price.js

var http = require('http'),
    jsdom = require('jsdom'),
    nodemailer = require('nodemailer');

smtpTransport = nodemailer.createTransport('SMTP', {
    service: 'Gmail',
    auth: {
        user: 'username@gmail.com',
        pass: 'password'
    }
}),

mailOptions = {
    from: 'Sender Name <sender@gmail.com>',
    to: 'receiver1@gmail.com, receiver2@gmail.com'
},

domConfig = {
    html: 'http://vacations.ctrip.com/freetravel/p68002s1.html',
    features: { QuerySelector: true },
    done: function (errors, window) {
        var doc = window.document,
            listPrice = 5545,
            travelDate = '2012-05-26',
            title = doc.querySelector('h2').textContent,
            price = window.$$.module.pageData
                .lines[0].dateInfo[travelDate][0];

        if (price !== listPrice) {
            mailOptions.subject = '[价格有变] ' + title;
            mailOptions.text = travelDate + ' 价格: RMB ' + price;
            smtpTransport.sendMail(mailOptions, function (err, res) {
                if (err) { console.error(err); }
                else { console.info('邮件已发送!'); }
            });
        } else {
            console.info('价格没有变动:(');
        }
    }
};

setInterval(function() {
    jsdom.env(domConfig);
}, 1000 * 60 * 10);