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RE: Clarification on HPACK dynamic table size increases?

From: Mike Bishop <Michael.Bishop@microsoft.com>
Date: Thu, 12 Mar 2015 23:49:26 +0000
To: Daurnimator <quae@daurnimator.com>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
Message-ID: <BL2PR03MB13254980CFB31A76C197F9C87060@BL2PR03MB132.namprd03.prod.outlook.com>
6.3 isn't saying that the value can only be reduced.  There is a maximum that the decompressor has said it's willing to allow the compressor, and the compressor is allowed to choose any value <= what the decompressor allows it.  The wording there could be cleaner, since there's a maximum table size, and a maximum value *for* the maximum table size.  :-(

-----Original Message-----
From: Daurnimator [mailto:quae@daurnimator.com] 
Sent: Thursday, March 12, 2015 3:53 PM
To: ietf-http-wg@w3.org
Subject: Clarification on HPACK dynamic table size increases?

I'm working on implementing HPACK, wanted clarification on whether the dynamic table can grow:

>From 4.2
> This mechanism can be used to completely clear entries from the dynamic table by setting a maximum size of 0, which can subsequently be restored.

However, 6.3 has a MUST that the table may only be reduced in size:
> The new maximum size MUST be lower than or equal to the last value of the maximum size of the dynamic table.


Regards,
Daurn.

Received on Thursday, 12 March 2015 23:49:59 UTC

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