Overview when using S3 or cloudflare R2 for uploads alongside a custom CDN URL, custom emoji uploads do not respect the CDN configuration and attempt to load directly from the raw bucket URL. The issue when an admin uploads a custom emoji, the uploader creates an upload record and saves the raw buc…

Testing a default set emoji :smiley: Testing a custom emoji :falco:

yea maybe it’s a cloudflare R2 only thing then. they are breaking on my instance. it only seems to break for new ones uploaded too. without the theme component fix, i have to run the remap every time i upload a new one. the PR might need a bit of work - i’m not super good with the emoji code.

Discourse uses a two CDN setup, one for assets and one proxying the app. Standard emoji uses one CDN, custom emoji uses the other CDN, but both are protected by a CDN on a properly configured website with a working two CDN setup. I went over that in the first related topic here [Bild…

oh i’ll have to have a look - i didn’t know that. thanks! edit: [Bild] Custom emoji don't use CDN for S3 stored assets in a few pages So standard emoji use one CDN while custom use another, but both are covered by CDN if you do a proper configuration following Using Object Storage for Uploads …

just confirming here that i installed and tested the PR branch after the recent changes to it and it fixes the issue.

[Bild] Lilly: i wrote the section for Cloudflare R2 so assume i have it setup correctly? what might i be missing? It is this section of the wiki guide I wrote: [Bild] Configure an S3 compatible object storage provider for uploads DISCOURSE_CDN_URL is a CDN that points to you Discourse hos…

[Bild] Falco: Do your test site have both CDN ENV vars set? i do have them set, but for gods sake i had a typo in my cloudflare config for the cdn-specific dns record that DISCOURSE_CDN_URL points to and i never tested it when i set it up because my site was working :laughing: what a gong sho…

Ha, no worries! [Bild] Lilly: at least i learned more about emoji code creating that pointless PR… That is how I learn the most, chasing rabbit holes that will never amount to anything tangible. But the knowledge from those is golden!

wow what a ride this was. i basically reconfigured my whole Cloudfare R2 object storage and Discourse instance, and i think this bug is legit for R2. when i fixed my cloudflare dns record and rebuilt the instance so that DISCOURSE_CDN_URL actually pointed to it, it borked a bunch of other stuff li…

Benutzerdefinierte Emojis, die von S3/R2 geladen werden, umgehen CDN-Routing

Unterstützung Installation

Falco (Falco) 30. Juni 2026 um 17:28 8

Es handelt sich um diesen Abschnitt des Wiki-Leitfadens, den ich verfasst habe:

Hast du beide festgelegt?

Dies ist ein Artefakt des Wechsels von Meta von AWS zurück zu Metal. Es fehlte ein neuer Cook, und ich habe HTML neu erstellt, um es zu beheben.

Hast du auf deiner Test-Website beide CDN-ENV-Variablen festgelegt?

Thema		Antworten	Aufrufe
Custom emoji don't use CDN for S3 stored assets in a few pages Support	7	2319	6. August 2020
Emoji Picker is not not using CDN URLs for custom emojis Bug emoji	10	298	3. Juni 2025
How do custom emoji URLs work? Development	0	677	8. August 2020
Chat thumbnails bypass s3_cdn_url & use raw S3 bucket URLs Bug cdn , s3 , chat , fixed	6	310	19. Juni 2026
Custom Emoji does not use Amazon S3 Feature	3	1283	16. März 2016

Benutzerdefinierte Emojis, die von S3/R2 geladen werden, umgehen CDN-Routing

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