Reverse_proxy header_down on location header... or something equivalent?

[francislavoie]

You’re essentially running into this:

The "subfolder problem", OR, "why can't I reverse proxy my app into a subfolder?"

Have you ever tried to reverse proxy an app into its own little subfolder of your domain name? Makes things neat, doesn’t it? Using example.com/foo/ for one app, example.com/bar/ for another. If you’re coming here from one of the selfhosted communities, you might be thinking along the lines of example.com/sonarr/, example.com/radarr/ etc. Chances are, you’ve tried some configuration along these lines: example.com { redir /sonarr /sonarr/ handle_path /sonarr/* { reverse_proxy localhost…

I have to recommend using a subdomain for that app instead of trying to proxy it under a subpath. On most linux distributions, *.localhost will also resolve to 127.0.0.1, so you could use rstudio.localhost to differentiate it from other apps.

If the app has a “base path” configuration or equivalent, you might use that to avoid needing to do additional manipulations. If it doesn’t, then it’ll always be a struggle to fix all the paths it responds with (including CSS/JS paths in HTML, redirects, etc).