racker/falcon — pull request #156 by lichray (2013-07-10 20:38:24+00:00)
Title: Not acceptable exception

My plan is to add this exception, then let users to add a `before` hook to perform the content checking. According to http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html , the response should including a possible media type list, but the media type of the response itself is not limited.