Added parsing of arbitrary media type parameters.

[steveklabnik]

Mime types can accept arbitrary parameters. Right now, we only supported the q parameter, this extends them to arbitrary ones.

Here's the grammar: http://www.ietf.org/rfc/rfc2045.txt

This parsing is still not fantastic: the regexp might be made better, since it doesn't ensure that we have both actual quotes. Also, I'm not 100% \w matches up with '<any (US-ASCII) CHAR except SPACE, CTLs, or tspecials>'

Related: #4918 and #4127.

[steveklabnik]

Woot! Thank you!

[rkh]

Is there a way to do content negotiation with this? Say, have the version as parameter?

[steveklabnik]

Yes. The accept header allows you to include 'extension parameters':

accept-extension = ";" token [ "=" ( token | quoted-string ) ]

[rkh]

No, I know that, I meant more along the lines: While you do handle parsing those parameters there, is some API exposed by rack to take this into account, say with respond_with, or do I have to interpret env on my own?

[steveklabnik]

Ahhh. I have no idea, to be honest. This came out of a request for this gem, which is working on this kind of thing. I haven't actually used this for anything yet, this is just the most fundamental change needed. It's quite possible to use it effectively, more things need to be exposed higher up in rack.