Add an accepts: option

[postmodern]

Add an accepts: option as a companion to provides:. This option would compare the media-type of a request to the list of MIME types. This is the Sinatra condition I am currently using:

set(:accepts) do |*types|
  mime_types = types.map { |t| mime_type(t) }.compact

  condition { mime_types.include?(request.media_type) }
end

[DAddYE]

@padrino/core-members any want to work on this, or @postmodern feel free to send us a pull request

[dariocravero]

I think we can look at implementing it for the new router. Thoughts?

[namusyaka]

Closed this in #1628
Please let me know if that is not good enough.

[postmodern]

Looks more robust than my little Sinatra condition. On a side note, has anyone tested how well Padrino is suited for Hyper Media APIs?