Any way to block cache or force a refresh?

[rwrife]

Is there any way to flag a request or url so that the caching layer forces a connection to the internet and refreshes the cached file? I thought I could create a category off of NSURL or NSURLRequest that would add a "forceRefresh" property that I could read in you startLoading method, but it appears that something inside the system is stripping off my custom property.....I suspect it is doing a manual copy of those objects.

[rwrife]

So I think I can create a category or inherit off of NSURL and include a nocache and refreshcache property, then in :canInitWithRequest have it check those properties, if nocache, return no, if refreshcache, get the cachepath for the url, delete any cached file located there.