url.scala

case class URL(method: Method = Method.Get,
               protocol: String = "http",
               host: String = null,
               port: Int = 80,
               path: String = "/",
               parameters: Map[String, List[String]])

sealed class Method(val value: String) extends EnumEntry[Method]

object Method extends Enumerated[Method] {
  val Get = new Method("get")
  val Put = new Method("put")
  val Trace = new Method("trace")
  val Connect = new Method("connect")
  val Head = new Method("head")
  val Delete = new Method("delete")
  val Patch = new Method("patch")
  val Post = new Method("post")
  val Options = new Method("options")
}

package object netty {
  implicit def request2URL(request: HttpRequest) = {
    val decoder = new QueryStringDecoder(request.getUri)
    val hostAndPort = request.getHeader(HttpHeaders.HOST)
    val hpSeparator = hostAndPort.indexOf(':')
    val host = if (hpSeparator != -1) {
      hostAndPort.substring(0, hpSeparator)
    } else {
      hostAndPort
    }
    val port = if (hpSeparator != -1) {
      hostAndPort.substring(hpSeparator + 1).toInt
    } else {
      80
    }
    val parameters = decoder.getParameters.map {
      case (key, values) => key -> values.toList
    }.toMap
    URL(method = httpMethod2Method(request.getMethod),
        protocol = "http",      // TODO: support other protocols
        host = host,
        port = port,
        path = decoder.getPath,
        parameters = parameters)
  }

  implicit def httpMethod2Method(m: HttpMethod) = Method.values.find(method => method.value == m.getName.toLowerCase).getOrElse(null)
}