Here's the scenario, I own foo.js, and it's being injected into random sites (let's call it cats.com).
From foo.js, I'd like to know where foo.js is being hosted and consumed from cats.com. For example, cats.com could do something like:
<script src="www.dogs1.com/foo.js" />
or they could do:
<script src="www.dogs2.com/foo.js />
In the first example, I'd like to print dogs1.com, and in the second I'd like to print dogs2.com. Is that possible?