Rails - Nov 2007 - respond_to with MIME type wildcards?

I''d like to respond to requests for all kinds of image MIME types from
a
single respond_to. In particular, I don''t want to register MIME types 
for each image format, I''d rather define only one with a wildcard, like
this 

  Mime::Type.register ''image/*'', :image

Then, in the controller handle it like this

  def show
    respond_to do |format|
      format.image  do
        # check if concrete MIME type can be provided
        ...
        send_file @image.filename, :disposition => ''inline''
      end

      format.html do
        # send HTML page embedding the image
      end
    end
  end

As it happens, this doesn''t work. Registered MIME types are matched 
literally, the ''*'' is not interpreted as a wildcard. 

The best I''ve come up with is this

  Mime::Type.register ''image/png'', :png
  Mime::Type.register ''image/jpeg'', :jpg,
[''image/jpg''], [:jpeg]

and then

      format.any(:png, :jpg)  do
        send_file @image.filename, :disposition => ''inline''
      end

Is there a another way?

Michael

-- 
Michael Schuerig
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org
http://www.schuerig.de/michael/

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