Action Text / Active Storage Attachments work with Amazon S3 but it doesn't work with Cloudflare R2

rubyonrails-talk
,
1

I’m working with Action Text / Trix and Attachments.

In development. Everything works when using Amazon S3 to upload and view attachments. When I tried using Cloudflare R2, rails uploads attachments succesfully but when reading them it gets a 404 not found.

This is my CORS setting in R2

[
  {
    "AllowedOrigins": [
      "*"
    ],
    "AllowedMethods": [
      "PUT",
      "GET",
      "POST"
    ],
    "AllowedHeaders": [
      "Origin",
      "Content-Type",
      "Content-MD5",
      "Content-Disposition"
    ],
    "ExposeHeaders": [
      "ETag"
    ],
    "MaxAgeSeconds": 3600
  }
]

The generated URL in Rails that’s gets a 404 (the same URL when using S3 works)

https://my-bucket.fe1c0a02f02ffa69fe7c257ed359ca28.r2.cloudflarestorage.com/ot8vt2wg2yu2yn9ba8d2rzblmjuj?response-content-disposition=inline; filename="ines-alvarez-fdez-u6rZ2_bUgUE-unsplash.jpg"; filename*=UTF-8''ines-alvarez-fdez-u6rZ2_bUgUE-unsplash.jpg&response-content-type=image/jpeg&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=f541df1c638aeb55963847ed0b34173b/20250722/auto/s3/aws4_request&X-Amz-Date=20250722T132433Z&X-Amz-Expires=300&X-Amz-SignedHeaders=host&X-Amz-Signature=e89653c3d1e0b188285b5b87398437f046fa537ff872e2cac7a7fd16ffe93d37

I assume this is a configuration issue but I’m not sure where/how to debug.

Any ideas?