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RE: Why "MUST" encoder emit Context Update

From: <K.Morgan@iaea.org>
Date: Thu, 31 Jul 2014 11:33:31 +0000
To: <OSAMAM@microsoft.com>, <ietf-http-wg@w3.org>
Message-ID: <0356EBBE092D394F9291DA01E8D28EC2011E33C56C@SEM001PD.sg.iaea.org>
On Thursday,31 July 2014 01:42, OSAMAM@microsoft.com wrote:
>    After applying an updated value of the HTTP/2 setting
>    SETTINGS_HEADER_TABLE_SIZE that changes the maximum size of the
>    header table used by the encoder, the encoder MUST signal this change
>    via an encoding context update (see Section 7.3). ...
>
> Why is it a 'MUST' for the encoder to emit a Context Update opcode?  ...

I agree this is confusing.

For example, suppose the encoder is only using 512 for the table size out of the 4096 default value for SETTINGS_HEADER_TABLE_SIZE.

Now suppose the decoder lowers SETTINGS_HEADER_TABLE_SIZE to 1024, why 'MUST' the encoder emit a Context Update opcode since the new setting doesn't force the encoder to lower the table size and therefore should have no effect?



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Received on Thursday, 31 July 2014 11:34:02 UTC

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