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Re: [hybi] Per-frame compression spec draft 06

John Tamplin <jat@google.com> Wed, 14 March 2012 15:11 UTC

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From: John Tamplin <jat@google.com>
Date: Wed, 14 Mar 2012 11:11:15 -0400
Message-ID: <CABLsOLDOhSbjtvKdy621TRuETF6RPrDojkz3ENg_KAp+tdBRsA@mail.gmail.com>
To: Arman Djusupov <arman@noemax.com>, Greg Wilkins <gregw@webtide.com>
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Cc: hybi@ietf.org, Gabriel Montenegro <Gabriel.Montenegro@microsoft.com>
Subject: Re: [hybi] Per-frame compression spec draft 06
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On Wed, Mar 14, 2012 at 4:37 AM, Arman Djusupov <arman@noemax.com> wrote:

> IMO a server should be ready to handle situations where the use of the one
> extension prohibits the use of another. Just like with HTTP Accept-Encoding
> header “gzip, deflate” or with mux channel compression “deflate-frame, mux,
> deflate-frame” where deflate-frame can be applied either before or after
> mux. Grouping up supported extensions into mutuality exclusive groups would
> probably be simpler than parsing complex extension headers and creating
> specifications for negotiating the extensions of each type.
>
> **
>
> The server can check the extension header for the presence of supported
> extensions from the same group. Once a supported extension found, other
> extensions of the same group are excluded. Such grouping of extensions can
> even be defined as comma separated list of extension names sorted by the
> order of preference.
>
@Greg - IIRC, you were one of the ones who objected to requiring low-level
code to know such details due to server architectures you had in mind -- is
that accurate and if so still the case?

-- 
John A. Tamplin
Software Engineer (GWT), Google

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