Overriding XMLHttpRequest on Internet Explorer

Question

I have to detect all ajax requests that are made in a specific web page (long story). The idea that I came with is overriding XMLHttpRequest.

I developed a simple script that does what I need. It works flawlessly on Firefox, Chrome, and Opera, but not on Internet Explorer. IE simply ignores the behavior I override.

How can I override XMLHttpRequest on Internet Explorer?

On Chrome (works):

On IE (doesn't work):

What do you mean by "isolate"? – talles Nov 28 '16 at 17:58 — talles, Nov 28 '16 at 17:58

score 0 · Answer 1 · answered Nov 28 '16 at 17:59

0

If you are trying to detect it, you can override the open method.

(function(){
  var oOpen = XMLHttpRequest.prototype.open;
  XMLHttpRequest.prototype.open = function() {
    console.log("here");
    oOpen.apply(this, arguments);
  };
}());

answered Nov 28 '16 at 17:59

epascarello

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It also doesn't work on IE... I'm overriding the `send` method by the way, the ctor overriding is just an easy to reproduce example. – talles Nov 29 '16 at 11:13
You might need to do it this way also http://stackoverflow.com/questions/797960/extending-an-activexobject-in-javascript – epascarello Nov 29 '16 at 12:27

score 0 · Answer 2 · answered Nov 29 '16 at 16:58

0

I had the same problem with IE9. Switch to IE11 and it will work fine.

answered Nov 29 '16 at 16:58

Z. Bassil

1

Unfortunately, I have to support older IE versions. – talles Nov 29 '16 at 18:35

Overriding XMLHttpRequest on Internet Explorer

2 Answers2