2

我正在尝试找出 Zombie.js。

我有这个脚本：

var Browser = require("zombie");
var assert = require("assert");

Browser.visit("http://web.mit.edu", function (e,browser) {
  console.log(browser.html());
});

那只是访问页面并记录 html，但我得到的 html 与我在普通浏览器中获得的源文件不匹配。

Zombie.js 输出：

<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <title>MIT - Massachusetts Institute of Technology</title>
    <meta name="keywords" content="Massachusetts Institute of Technology, MIT" />
    <meta name="description" content="MIT is devoted to the advancement of knowledge and education of students in areas that contribute to or prosper in an environment of science and technology." />
    <meta name="robots" content="index,follow,noodp,noydir" />
    <meta name="allow-search" content="yes" />
    <meta name="language" content="en" />
    <meta name="distribution" content="global" />
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="Expires" content="Tue, 01 Jan 1980 1:00:00 GMT" />
    <meta http-equiv="Pragma" content="no-cache" />
    <meta http-equiv="cache-control" content="no-store" />
    <link rel="canonical" href="http://web.mit.edu" />
    <link rel="image_src" href="http://web.mit.edu/img/MIT_logo.gif" />
    <link rel="search" type="application/opensearchdescription+xml" href="http://web.mit.edu/opensearch.xml" title="MIT - Massachusetts Institute of Technology" />
    <link href="https://plus.google.com/104984516469461796485/" rel="publisher" />
    <!-- icons -->
    <link rel="shortcut icon" href="/favicon.ico" />
    <!-- rss -->
    <link rel="alternate" type="application/rss+xml" title="MIT - Home Page News" href="http://feeds.feedburner.com/mit/news-homepage" />
    <!-- style sheets - global -->
    <link href="styles/style3536.css" rel="stylesheet" type="text/css" media="all" />
    <script src="http://dnn506yrbagrg.cloudfront.net/pages/scripts/0011/6778.js" type="text/javascript"></script>
    <script type="text/javascript" src="http://www.google-analytics.com/ga.js"></script>
    <script type="text/javascript"> 
        var _gaq = _gaq || [];
        _gaq.push(
            ['_setAccount', 'UA-1592615-11'],
            ['_trackPageview','/'],
            ['rollup._setAccount', 'UA-31439876-1'],
            ['rollup._trackPageview', '/mit/www/']
        );
        (function() {
        var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
        ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
        var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
        })();   
    </script>
    <style type="text/css" media="screen">#flashcontent {visibility:hidden}#flashcontent {visibility:visible}</style>
  </head>
  <body>
    <a href="http://events.mit.edu/">Tuesday, October 23, 2012</a>
  </body>
</html>

而且真正的源码真的很长，去http://web.mit.edu看看吧

这是怎么回事？

4

1 回答 1

2

如果你assert用来比较源代码和僵尸的结果，你会因为以下几点而得到一个错误：

首先browser.html()不给你文档类型。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

第二个也是更重要的 MIT 使用 javascript 文件，这些文件在一秒超时后加载

<script type="text/javascript">
  setTimeout(function(){var a=document.createElement("script");
  var b=document.getElementsByTagName('script')[0];
  a.src=document.location.protocol+"//dnn506yrbagrg.cloudfront.net/pages/scripts/0011/6778.js";
  a.async=true;a.type="text/javascript";b.parentNode.insertBefore(a,b)}, 1);
</script>

或异步

var _gaq = _gaq || [];
_gaq.push(
  ['_setAccount', 'UA-1592615-11'],
  ['_trackPageview','/'],
  ['rollup._setAccount', 'UA-31439876-1'],
  ['rollup._trackPageview', '/mit/www/']
);
(function() {
  var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
  ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

源代码向您显示加载它们的代码，同时zombie为您提供结果

<script src="http://dnn506yrbagrg.cloudfront.net/pages/scripts/0011/6778.js" type="text/javascript"></script>

和

<script type="text/javascript" src="http://www.google-analytics.com/ga.js"></script>

根据这些脚本的内容，它们可能会进一步改变 DOM，并且僵尸显示出更多的偏差。不幸的是，我不知道解决方法。

于 2012-10-24T08:56:43.103 回答