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Re: [elpa] externals/marginalia 94fc7f0: README: Add ELPA badge

From: chad
Subject: Re: [elpa] externals/marginalia 94fc7f0: README: Add ELPA badge
Date: Thu, 3 Jun 2021 16:12:02 -0700

On Thu, Jun 3, 2021 at 8:16 AM Stefan Monnier <monnier@iro.umontreal.ca> wrote:
Any change we can use something less aggressive than `no-cache`,
e.g. indicate that it should be considered stale after, say, 24h?

You can try using the s-maxage setting for Cache Control, ala:

Overrides max-age or the Expires header, but only for shared caches (e.g., proxies). Ignored by private caches.

I would definitely test it before investing too much effort; in a past life, I spent waaay too much time dealing with the general internet's understanding/respect for the refinements of communication between clients, servers, proxies, and caches. (tl;dr: The internet is more broken than you expect. Yes, even you, for nearly all values of "you".)

If s-maxage doesn't work, you might have more luck with max-age (which I guess is consistent in the number of hyphens?) instead. 

You should be able to use the Apache "Header" directive, something like:

  Header set Cache-control "s-maxage=86400, public"

put inside the relevant <Directory "/mumble/badges"> or <Filesmatch "\.svg$"> or whatnot wrapper.

I haven't actually done this in a very long time, but a quick net-search suggests that it's still basically as functional. Hope this helps,

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