Add URL rewriting in Rails

[hunchr]

TICKET-23056

Discussed with @sislr

[coorasse]

Why do we do this on the app layer and not cloudflare?

[hunchr]

Why do we do this on the app layer and not cloudflare?

I'd also prefer to configure it in Cloudflare tbh. But @sislr prefers it to be in the code rather than "hidden in Cloudflare"

@schmijos what's your opinion?

[sislr]

Suggested change

	if (app_host = ENV["APP_HOST"]).present?
	match "*path", constraints: ->(req) { req.host != app_host && !req.path.start_with?("/.well-known/") },
	to: redirect { |_params, req| "https://#{app_host}#{req.fullpath}" }, via: :all
	end
	if (canonical_host = ENV["CANONICAL_HOST"]).present?
	match "*path", constraints: ->(req) { req.host != canonical_host && !req.path.start_with?("/.well-known/") },
	to: redirect { |_params, req| "https://#{canonical_host}#{req.fullpath}" }, via: :all
	end

I'd rather use a separate ENV variable here. APP_HOST is in most cases also set in staging apps AFAIK

[hunchr]

Isn't that what we want? If the env is set in staging/develop, then the deplo.io host redirects to renuoapp.