How can I fix Sinatra redirects switching from https to http under nginx?

Question

I have a Sinatra app running in nginx (using thin as a back-proxy) and I'm using redirect '/<path>' statements in Sinatra. However, when I access the site under https, those redirects send me to http://localhost/<path> rather than to https://localhost/<path> as they should.

Currently, nginx passes control to thin with this command proxy_pass http://thin_cluster, where thin_cluster is

upstream thin_cluster { server unix:/tmp/thin.cct.0.sock; }

How can I fix this?

Answer 1

Try this:

redirect "https://#{request.host}/<path>"

Sinatra is lightweight, it does not have any detection for this by default i guess.

Answer 2

You should be able to achieve this with the proxy_redirect directive. If proxy_redirect default doesn't work (it should be the default setting), try something like this:

proxy_redirect http://localhost/ https://localhost/;