Provide a way to disable external fetches.

[tomprince]

There appears to be no easy way to stop jsonschema from doing blocking I/O when it encounters external references.

[Julian]

What you might want is RefResolver.store, retrieve your documents asynchronously and then shove them in there before validation.

You also probably would be interested by finishing the API changes needed to make #133 possible.

[tomprince]

The only helps if I happen to store all the documents I need, but if I happen to miss one, then my code starts blocking.

[tomprince]

I'd happy if there was an option to either error out, or treat a reference to an unavailable document as a reference to an empty document.

[Julian]

Ah I see. Well, RefResolver is public API and nothing funky is going on, if you wanted to error out, the easiest way would be to create a ref resolver and then raise a RefResolutionError in the resolve_remote method (or return your empty document as you prefer).

Bit light on docs on how to do that or what constitutes the interface, if it's not obvious enough shout.