[squid-dev] [PATCH] Revalidate without Last-Modified

Alex Rousskov rousskov at measurement-factory.com
Sat Aug 27 22:12:48 UTC 2016

On 08/27/2016 08:33 AM, Amos Jeffries wrote:

> If the response Squid would emit to the client proxy would contain a
> synthesized Last-Modified header - then the same synthetic value should
> be sent in HTCP.

I agree with that decision logic.

> I think Squid should be emitting a synthetic L-M header. So yes to
> effective modification time being sent (in both HTCP and HTTP responses).

I am worried that emitting effective/synthetic LMT would confuse some
clients that are currently working OK (possibly, but not necessarily,
including some Squids). After all, "unknown LMT" and "LMT of at most X"
are not exactly the same things, even if the protocol treats them the
same in many specific cases.

However, if Amos is sure that always emitting effective LMT [in cache
hits?] is a good idea, then I have no grounds for an objection.

Thank you,


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