in app/helpers/CORSable.scala [10:19]
def apply(request: Request[A]): Future[Result] = {
val headers = request.headers.get("Origin").map { origin =>
if(origins.contains(origin)) {
List(CORSable.CORS_ALLOW_ORIGIN -> origin, CORSable.CORS_CREDENTIALS -> "true")
} else { Nil }
}
action(request).map(_.withHeaders(headers.getOrElse(Nil) :_*))
}