Should custom formatters have access to headers and status?

[adamgotterer]

I've been working on some custom formatters and realized that there is no control over the headers and status within the formatter or error formatter. The change is relatively easy to make but it will break backwards compatibility because the custom formatters will need to take new additional parameters. The other option would be to exec custom formatters against the grape formatter middleware and expose functions in a DSL like format.

Thoughts?

[dblock]

I vote to go the DSL route.