Play 2.4.6 HTTPS filter

Filters.scala

package controllers;

import play.api._
import play.api.http.HttpFilters                                                                                       
import play.api.mvc._
import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global
import play.api.Play.current


class TLSFilter extends Filter {
  def apply(nextFilter: RequestHeader => Future[Result])(requestHeader: RequestHeader): Future[Result] = { 
    if(requestHeader.headers.get("X-Forwarded-Proto").getOrElse("http") != "https" && Play.isProd)
      Future.successful(Results.MovedPermanently("https://" + requestHeader.host + requestHeader.uri))
    else
      nextFilter(requestHeader).map(_.withHeaders("Strict-Transport-Security" -> "max-age=31536000"))
  }
}

class MyFilters extends HttpFilters {
  val filters = Seq(new TLSFilter)
}