A Vapor middleware to redirect reverse proxy requests originating as http to https.
For example, if you are deploying a Vapor app to a Heroku free dyno, you might wish to piggyback on the SSL of the herokuapp.com domain. The Heroku router will relay both http and https requests to your app as http, but report the original scheme in the appended header X-Forwarded-Proto. We can inspect this header, and use it to redirect http requests to https.
To use Vapor X-Forwarded-Proto Middleware, add the middleware to your services:
let services = Services.default()
let middlewares = MiddlewareConfig()
middlewares.use(XFPMiddleware())
services.register(middlewares)
let app = Application(services: services)