If I wanted to intercept all server requests that aren't https, and aren't prefixed with

www

, and redirect to the

<https://www>.

version of my site - what would be the best way to do that?

I would do this on proxy/balancer level

There are of course many solutions to this problem; but I found 'Traefik' to be an excellent fit: https://traefik.io/

Sure - that's if your project has a proxy / balancer though. I need to do this with ktor.

I wouldn’t say that it’s “the best way”, but what is problem to do that with ktor just by writing own interceptor? Something like this https://ktor.io/advanced/pipeline/route.html#how-to-intercept-preventing-additional-executions

Also see HttpsRedirect and HSTS features: https://ktor.io/servers/features/hsts.html https://ktor.io/servers/features/https-redirect.html