Firefox (Gecko) code - interrogating the cache - how do I get a list of devices?

Question

Referring to nsICacheService (https://developer.mozilla.org/en/NsICacheService) and nsICacheVisitor (https://developer.mozilla.org/en/nsICacheVisitor):

1. Where do I get an instance of nsICacheVisitor?
2. Where do I get a list of devices so that I can call visitEntry() and visitDevice()?

Answer 1

The nsICacheVisitor is an interface that you implement and pass to the visitEntries method on nsICacheService. See this test file for example code.