taobao.js

"use strict";

function waitFor(testFx, onReady, timeOutMillis) {
    var maxtimeOutMillis = timeOutMillis ? timeOutMillis : 3000, //< Default Max Timout is 3s
        start = new Date().getTime(),
        condition = false,
        interval = setInterval(function() {
            if ( (new Date().getTime() - start < maxtimeOutMillis) && !condition ) {
                // If not time-out yet and condition not yet fulfilled
                condition = (typeof(testFx) === "string" ? eval(testFx) : testFx()); //< defensive code
            } else {
                if(!condition) {
                    // If condition still not fulfilled (timeout but condition is 'false')
                    console.log("'waitFor()' timeout");
                    phantom.exit(1);
                } else {
                    // Condition fulfilled (timeout and/or condition is 'true')
                    console.log("'waitFor()' finished in " + (new Date().getTime() - start) + "ms.");
                    typeof(onReady) === "string" ? eval(onReady) : onReady(); //< Do what it's supposed to do once the condition is fulfilled
                    clearInterval(interval); //< Stop this interval
                }
            }
        }, 250); //< repeat check every 250ms
};

var page = require('webpage').create(),
    system = require('system'),
    t, address;

page.onConsoleMessage = function(msg) {
    // console.log(msg);
};

if (system.args.length === 1) {
    console.log('Usage: loadspeed.js <some URL>');
    phantom.exit();
}

t = Date.now();
address = system.args[1];
page.open(address, function(status) {
    if (status !== 'success') {
        console.log('FAIL to load the address');
    } else {
        t = Date.now() - t;
        console.log('Loading ' + system.args[1]);
        console.log('Loading time ' + t + ' msec');

        var title = page.evaluate(function() {
            return document.title;
        });
        console.log('Page title is ' + title);

        waitFor(function(){
            return page.evaluate(function() {
                // return typeof(document.getElementById('J_PromoPriceNum')) != null;
                return document.getElementById('J_PromoPriceNum')
            });
        }, function() {
            var promo_price = page.evaluate(function() {
                return document.getElementById('J_PromoPriceNum').textContent;
            })
            var price = page.evaluate(function() {
                return document.getElementById('J_StrPrice').getElementsByClassName('tb-rmb-num')[0].textContent;
            })
            console.log('Price is ' + price);
            console.log('Promo Price is ' + promo_price);
            phantom.exit(1);
        }, 10000);
    }
    // phantom.exit();
});