Re: New precondition fields and caching

Martin Thomson writes:

> Assuming that interpretation is valid, how is this reconciled with existing
> uses of validation?  If-None-Match and If-Modified-Since specifically, which
> never in practice get recorded in Vary (at least not as far as I can tell).
> Is it that we effectively bless these fields and require caches to understand 
> them?

I think the answer is yes, but with the footnote that Cache-Control
should also be set to mitigate downright disasters, if an intermediary
does not grok If-*

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Received on Monday, 7 September 2020 07:02:38 UTC