Http4s is a minimal, idiomatic Scala interface for HTTP services. Http4s is Scala's answer to Ruby's Rack, Python's WSGI, Haskell's WAI, and Java's Servlets.

val service = HttpService {
    case GET -> Root / "hello" =>
      Ok("Hello, better world.")
  }

Learn more at http4s.org.

Quick start from giter8 template.