Normalize GET URLs in Play Framework 2.x

Helpers.scala

package controllers

import play.api.mvc._
import play.api.mvc.Results._

object Application extends Controller {

  def untrail(path: String) = Action {
    MovedPermanently("/" + path)
  }

}

routes

GET   /                 controllers.Application.index
GET   /*path/           controllers.Application.untrail(path: String)

# other routes