Skipping API responses, where we need absolute URLs, and those that are
intended for sharing or external use:
- account/join_codes/show.html.erb - Join code URL for sharing
- boards/edit/_publication.html.erb - Publication URL for sharing
- public/* views - Public page URLs and og:url meta tags
- pwa/manifest.json.erb - PWA manifest needs absolute URLs
For this, we had to replace `url_for` used with Active Storage variants
and previews with the specific path helper (for Active Storage
representations).
This allows us to have different cache controls depending on whether
you're viewing your own avatar, or someone else's. Your own avatar will
always be fresh, while other folks' avatars can be pulled from the CDN.
- redirect avatar image requests to the rails_blob_url, instead of
streaming them through the web app
- use a thumbnail variant for avatar images
- only put avatar initials behind the stale? check (not the image
redirect, which would result in browsers rendering broken images when
an avatar is changed, until max-age expires)
Locally, having stale_while_revalidate works great, but in production when we are behind CloudFlare, this results in an old image being shown after you upload a new one
See: https://app.fizzy.do/5986089/cards/2978
Rosa Gutierrez