From: "Ludovic Courtès" <ludo@gnu.org>
To: Tobias Geerinckx-Rice <me@tobias.gr>
Cc: 37207@debbugs.gnu.org
Subject: bug#37207: guix.gnu.org Last Modified at epoch
Date: Thu, 26 Sep 2019 10:39:45 +0200 [thread overview]
Message-ID: <87wodvpi26.fsf@gnu.org> (raw)
In-Reply-To: <877e6xqrtw.fsf@nckx> (Tobias Geerinckx-Rice's message of "Wed, 28 Aug 2019 16:37:15 +0200")
Hi Tobias,
Tobias Geerinckx-Rice <me@tobias.gr> skribis:
> Turning these off will of course prevent all caching. I don't know if
> that would add measurable load to guix.gnu.org (it would be more
> problematic if we used a CDN, but it might still make a difference).
>
> Nix does something both interesting and icky — as always: patch[0]
> nginx to look up the realpath() instead, so clients can still cache
> using If-None-Match.
> [0]: https://github.com/NixOS/nixpkgs/pull/48337
(See
<https://raw.githubusercontent.com/NixOS/nixpkgs/9bc23f31d29138f09db6af52708a9b8b64deec64/pkgs/servers/http/nginx/nix-etag-1.15.4.patch>.)
I had overlooked this patch but it looks like the right approach
overall. Calling ‘realpath’ each time seems a bit expensive as it
creates an ‘lstat’ storm, but I can’t think of a better solution.
I also found this post whose main interest is in showing how to write a
plugin to generate custom etags:
https://mikewest.org/2008/11/generating-etags-for-static-content-using-nginx/
Thoughts?
Ludo’.
next prev parent reply other threads:[~2019-09-26 8:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 9:52 bug#37207: guix.gnu.org returns Last-Modified = Epoch Ludovic Courtès
2019-08-28 10:40 ` bug#37207: guix.gnu.org Last Modified at epoch Gábor Boskovits
2019-08-28 14:37 ` Tobias Geerinckx-Rice via Bug reports for GNU Guix
2019-08-28 19:42 ` Gábor Boskovits
2019-08-28 20:32 ` Ludovic Courtès
2019-08-29 6:11 ` Gábor Boskovits
2019-08-29 12:40 ` Ludovic Courtès
2019-09-05 20:47 ` Ludovic Courtès
2019-09-26 8:39 ` Ludovic Courtès [this message]
2019-08-28 15:05 ` Danny Milosavljevic
2019-08-28 18:59 ` Gábor Boskovits
2020-03-26 23:06 ` bug#37207: nginx serving files from the store returns Last-Modified = Epoch Vincent Legoll
2020-03-29 9:50 ` Gábor Boskovits
2020-03-30 11:53 ` Vincent Legoll
2020-03-26 23:30 ` bug#37207: Repology Vincent Legoll
2020-05-09 22:07 ` bug#37207: guix.gnu.org returns Last-Modified = Epoch Christopher Baines
2020-05-10 10:11 ` Ludovic Courtès
2020-05-11 10:32 ` Christopher Baines
2020-05-11 12:47 ` Ludovic Courtès
2020-05-25 8:24 ` Christopher Baines
2020-05-25 8:20 ` bug#37207: [PATCH] nginx: berlin: Work around Last-Modified issues for guix.gnu.org Christopher Baines
2020-05-15 21:12 ` bug#37207: nginx serving files from the store returns Last-Modified = Epoch anadon via web
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