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Date: Wed, 5 Feb 2020 23:49:33 -0800
From: Robin Lee Powell <rlpowell@digitalkingdom.org>
To: lojban@googlegroups.com
Subject: Re: [lojban] What's going with CloudFlare and caching and such.
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On Wed, Feb 05, 2020 at 10:29:19PM -0800, Robin Lee Powell wrote:
> Some of you have noticed problems with dynamic content on lojban.org
> now that we've started using CloudFlare.  I haven't been able to
> figure out how to fix this, so here's what's going on; maybe
> somebody else will have ideas.
> 
> So the goal of CloudFlare, primarily, was to make it so that if my
> server went down, the site would be basically fine.  This we have
> acheived.
> 
> However, to do so, I had to use brute force.  Here's our CloudFlare
> page rules:
> 
> *lojban.org/*&*          Cache Level: Bypass
> *lojban.org/*edit*       Cache Level: Bypass
> *lojban.org/*Special:*  Cache Level: Bypass
> *lojban.org/*Talk:*     Cache Level: Bypass
> *lojban.org/*           Browser Cache TTL: 30 minutes, Always Online: On, Cache Level: Cache Everything, Edge Cache TTL: 2 hours, Origin Cache Control: Off
> 
> That last one is a very large hammer that says "just cache the hell
> out of everything".
> 
> The reason I need that hammer is that mediawiki is returning
> absurdly wrong caching headers.  Here's an example that entirely
> bypasses CloudFlare:
> 
> $ curl -k -v -H 'Host: mw.lojban.org' -L https://jukni.lojban.org/papri/pronunciation 2>&1 | less 
> [snip]
> < HTTP/1.1 200 OK
> < Date: Thu, 06 Feb 2020 06:26:31 GMT
> < Server: Apache/2.4.38 (Debian)
> < X-Powered-By: PHP/7.3.14
> < X-Content-Type-Options: nosniff
> < Content-language: en
> < Vary: Accept-Encoding,Cookie
> < Expires: Thu, 01 Jan 1970 00:00:00 GMT
> < Cache-Control: private, must-revalidate, max-age=0
> 
> ^^ That.   That Cache-Control line is absurd, and effectively
> completely disableds CloudFlare.

FWIW, I turned the test site on at , for example ,
http://mw-test.lojban.org/papri/Pronunciation (which is a very
simple, static page).

If you look at the headers there you'll see:

< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache

And below is the entire LocalSettings.php file for the test site; as
you can see it's absurdly simple.

So, again, I have no idea why mediawiki is saying not to cache the
pages ever.

Also, $wgUseSquid = true; makes no difference.

- ------------

$ cat /var/www/mediawiki/LocalSettings.php | grep -v '^#'
<?php

if ( !defined( 'MEDIAWIKI' ) ) {
        exit;
}


$wgSitename      = "Lojban";
$wgMetaNamespace = "Lojban";

$wgScriptPath       = "";
$wgScriptExtension  = ".php";
$wgArticlePath = "/papri/$1";
//$wgArticlePath = "/wiki/$1";  # Virtual path. This directory MUST be different from the one used in $wgScriptPath

$wgServer           = "http://mw-test.lojban.org";
$wgCanonicalServer  = "http://mw-test.lojban.org";

$wgStylePath        = "$wgScriptPath/skins";

$wgDBtype           = "mysql";
$wgDBserver         = "jukni:11036";  # Not 'localhost'; that will try to do a socket connection, instead of TCP
$wgDBname           = "mediawiki";
$wgDBuser           = "root";
$wgDBpassword       = "[snip]";

$wgDBprefix         = "";

$wgDBTableOptions   = "ENGINE=InnoDB, DEFAULT CHARSET=binary";

$wgDBmysql5 = true;

- ------------

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