Client.scala

import com.twitter.finagle.{Http, Service}
import com.twitter.util.{Await, Future}
import java.net.InetSocketAddress
import org.jboss.netty.handler.codec.http._

object Client extends App {
    val client: Service[HttpRequest, HttpResponse] =
        Http.newService("localhost:8080/failures")
        val request =  new DefaultHttpRequest(
                HttpVersion.HTTP_1_1, HttpMethod.GET, "/")
        val response: Future[HttpResponse] = client(request)
        response onSuccess { resp: HttpResponse =>
            println("GET success: " + resp)
        }
    Await.ready(response)
}

Proxy.scala

import com.twitter.finagle.{Http, Service}
import com.twitter.util.{Await, Future}
import java.net.InetSocketAddress
import org.jboss.netty.handler.codec.http._
import com.twitter.finagle.builder.{ClientBuilder, ServerBuilder}

object Proxy extends App {
    val client: Service[HttpRequest, HttpResponse] =
        Http.newService("www.google.com:80")

        val server = Http.serve(":8080", client)
        Await.ready(server)
}

Server.scala

import com.twitter.finagle.{Http, Service}
import com.twitter.util.{Await, Future}
import java.net.InetSocketAddress
import org.jboss.netty.handler.codec.http._

object Server extends App {
    val service = new Service[HttpRequest, HttpResponse] {
        def apply(req: HttpRequest): Future[HttpResponse] =
                                     Future.value(new DefaultHttpResponse(
                                                 req.getProtocolVersion, HttpResponseStatus.OK))
    }
    val server = Http.serve(":8080", service)
        Await.ready(server)
}