export public asset helper (ETag/mtime) and a stable public storage base path

[erikkkwu]

I’m using Nuxt/Nitro to serve country-specific images from a custom Nitro handler. To set proper HTTP caching, I need ETag and Last-Modified (mtime). The Nitro static handler already does this, but there’s no public asset helper to reuse.

Requests

please export the public asset helpers so handlers can get { etag, lastModified/mtime, size } for a file from storage and set consistent headers.

What’s the recommended way to point an fs storage to the built public folder at runtime? In Docker, when WORKDIR differs from the build path, relative base (e.g. ../public) didn’t resolve for the fs driver. The only working setup was:

nitro: {
  storage: {
    publicFolder: {
      driver: 'fs',
      base: fileURLToPath(new URL('./.output/public', import.meta.url))
    }
  }
}

This feels brittle. Is there a documented alias/constant/helper for resolving the public directory, or can Nitro expose the static storage so handlers can reference it directly?

Maybe I missed it
If there’s already a documented API or alias for ETag/mtime and the public folder storage, please point me to it. Happy to switch if I overlooked something.