How to identify an HTTP request by parsing JavaScript and HTML?

Question

I am wondering if we can analyze JavaScript code to determine if the web page will contain these JSs, send an HTTP request to another domain.

For example, some people put their static web page files on my web server (DOMAIN A), and I don’t want their file to send an HTTP request to another site (for example, DOMAIN B).

Here's how they can do it:

• Using the img tag: <img src="http://domain.b.com/statics">

• Using the script tag.

• Using a form tag.

• Using an iframe tag.

In addition, we can also use JS to generate an HTTP request, for example:

var f = document.createElement('form');
f.action = "http://domain.b.com/statics";
...

Javascript can be confusing, javascript above can be compressed as:

eval(function(p,a,c,k,e,d){e=function(c){return c};if(!''.replace(/^/,String)){while(c--){d[c]=k[c]||c}k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p}('4 0=3.2(\'1\');0.5="9://8.7.6/10";',10,11,'f|form|createElement|document|var|action|com|b|domain|http|statics'.split('|'),0,{}))

Answer 1

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