Re: [hybi] I-D Action: draft-ietf-hybi-permessage-compression-09.txt

Takeshi Yoshino <tyoshino@google.com> Tue, 04 June 2013 13:01 UTC

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From: Takeshi Yoshino <tyoshino@google.com>
Date: Tue, 4 Jun 2013 20:35:20 +0900
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To: Tobias Oberstein <tobias.oberstein@tavendo.de>
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Subject: Re: [hybi] I-D Action: draft-ietf-hybi-permessage-compression-09.txt
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On Sun, Jun 2, 2013 at 7:29 AM, Tobias Oberstein <
tobias.oberstein@tavendo.de> wrote:

> > Please post your opinions and experience (implemented, faced any
> difficulties, found issues, etc.).
>
> """
>    A client MAY attach the "c2s_max_window_bits" extension parameter if
>    the client can adjust LZ77 sliding window size based on the
>    "c2s_max_window_bits" sent by the server.  This parameter has no
>    value.
> """
>
> Any reason there is no "c2s_no_context_takeover" parameter that allows the
> client to _announce_ it supports the feature?
>

I assumed that there's no platform/language where it's difficult to
implement c2s_no_context_takeover. It means that DEFLATE context is
singleton and can never be reset (or reset operation is very heavy).

Unless there's any existing difficulty, c2s_no_context_takeover should be
supported widely, I think.

Your suggestion allows a client to force a server which is reluctant to but
can enable c2s_context_takeover to enable it. Do you think it's important
functionality?