With Ruby on Rails, it is common to fingerprint your assets (images, CSS, javascript) with a hash. If the file contents change, the hash changes, which busts browser and CDN caches. Has anyone tried doing this with Gradle+Ktor server applications?

If you use the

CachingHeaders

plugin (documentation), Ktor adds the HTTP caching headers to all requests to static files, so there is no need to add hashes

I don’t think that solves the same problem, does it?

Oops, it's the

ConditionalHeader

plugin that enables this functionality, sorry (documentation)

I still don’t think that fully solves the issue.

Indeed. You could greatly minimize it by using

CachingHeaders

as well.