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[Bug 13995] Don't check Content-Type for <track>

From: <bugzilla@jessica.w3.org>
Date: Tue, 27 Sep 2011 07:49:53 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1R8SQL-0005XT-Mt@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=13995

--- Comment #21 from Philip Jägenstedt <philipj@opera.com> 2011-09-27 07:49:51 UTC ---
(In reply to comment #19)
> I misremembered what we did with media resources.
> 
> 
> > > What's the signature for TTML?
> > 
> > It's XML, we all know that sniffing it is not a good idea.
> 
> I'm at a loss as to how to make this work then. Could you elaborate on how you
> want this to work?

Add a section "Text Tracks" to
http://tools.ietf.org/html/draft-ietf-websec-mime-sniff-03 that says:

This section defines the *rules for sniffing text tracks specifically*.

   If the first octets match one of the signatures in Section 6 for one
   of the following media types, then let the sniffed-type be the
   corresponding media type and abort these steps:

   o  text/vtt

   Otherwise, let the sniffed-type be the official-type and abort these
   steps.

Of course, also update section 6 with the WebVTT magic.

In effect, this will allow browser that only support WebVTT to ignore
Content-Type since anything that begins with "WEBVTT" works and anything that
doesn't will fire an error event (technically for two different reasons, but
the API doesn't make that distinction.)

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Received on Tuesday, 27 September 2011 07:49:56 UTC

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