POST is casted to GET about rncachingurlprotocol

[rnapier]

This isn't that surprising. You almost certainly don't want to be caching these pages, so you should modify +canInitWithRequest: to exclude them. Currently it caches everything with an http protocol.

Since it creates a new intermediary connection using NSURLConnection, it is always going to be GET (or POST if there's a body defined in the NSURLRequest). AFNetworking uses lower level methods to modify its requests. You could expand startLoading to copy these special AFNetworking requests, but since you probably don't want to cache them anyway, I would recommend excluding them in +canInitWithRequest:.

[pakaufmann]

Ok, thanks for the explanation.
I close the issue, because it's working as designed 😄