decoding url path elements in unfiltered

build.sbt

libraryDependencies += "net.databinder" %% "unfiltered-netty-server" % "0.5.3"

server.scala

object Decode {
  import java.net.URLDecoder
  import java.nio.charset.Charset

  trait Extract {
    def charset: Charset
    def unapply(raw: String) = try {
      Some(URLDecoder.decode(raw, charset.name()))
    } catch {
      case _ => None
    }
  }

  object utf8 extends Extract {
    val charset = Charset.forName("utf8")
  }
}

object Server {
  import unfiltered.request._
  import unfiltered.response._
  import unfiltered.netty._

  def main(args: Array[String]) {
    Http(8080).handler(cycle.Planify{
      case GET(Path(Seg("resource" ::  "name" :: Decode.utf8(query) :: Nil))) =>
        ResponseString("decoded path element %s" format query)
    }).run
  }
}