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Description
Some providers like imgix (https://docs.imgix.com/setup/securing-images) or Cloudinary (https://cloudinary.com/documentation/control_access_to_media) support signing URLs to disallow an attacker generating an unlimited amount of URLs causing downtimes, unprivileged access, resource abuse, etc.
To properly supporting this, we need a server only mechanism that can sign URLs (if exposing tokens to the client-side, an attacker can still access them to sign!). This can be possible with a serverMiddleware or server-only plugin/runtimeConfig (example idea: #205 (comment)). And introducing new set of usage limitations. (thus needs discussion before trying to implement)