Support HTTP caching.

[iota9star]

😆

Please let ExtendedNetworkImageProvider support HTTP caching.

eg: flutter_cache_manager

[phamnhuvu-dev]

I moved from cached_network_image to this package because of this flutter_cache_manager depends on too much library is not necessary and also depends on the device with sqflite, rxdart(this package has bad structure when refactoring too much and not backward compatible).

And it can not run on the web platform too.
So don't use flutter_cache_manager for this feature

[zmtzawqlp]

@phamnhuvu-dev i agree with you.
i think for special requirement ，user can make a custom provider from extendednetworkprovider. ExtendedImageProvider should be simple.