Simple http logging proxy written with scala & scala-cli

proxy.scala

//> using scala "3.3.0"
//> using dep "org.http4s::http4s-ember-client:0.23.27"
//> using dep "org.http4s::http4s-ember-server:0.23.27"
//> using dep "org.http4s::http4s-dsl:0.23.27"
//> using dep "ch.qos.logback:logback-classic:1.5.6",

import org.http4s.HttpRoutes
import cats.effect.IO
import org.http4s.ember.server.EmberServerBuilder
import org.http4s.ember.client.EmberClientBuilder
import org.http4s.dsl.*
import com.comcast.ip4s.ipv4
import com.comcast.ip4s.port
import org.http4s.HttpApp
import org.http4s.Response
import org.http4s.Request
import org.http4s.server.middleware.Logger
import org.http4s.Uri
import cats.effect.IOApp
import cats.effect.ExitCode
import org.http4s.Uri.Authority

object Main extends IOApp {

  override def run(args: List[String]): IO[ExitCode] = (for {
    c <- client
    s <- server { req =>
      org.http4s.client.middleware
        .Logger(true, true)(c)
        .run(
          req.withUri(
            req.uri.copy(authority =
              Some(Authority(userInfo = None, port = Some(7777)))
            )
          )
        )
        .use { response =>
          IO(response)
        }
    }
  } yield ()).useForever

  val client = EmberClientBuilder
    .default[IO]
    .build

  def server(f: Request[IO] => IO[Response[IO]]) = EmberServerBuilder
    .default[IO]
    .withHost(ipv4"0.0.0.0")
    .withPort(port"8080")
    .withHttpApp(Logger.httpApp(true, true)(HttpApp(f)))
    .build

}

In order to run it just call scala-cli https://gist.github.com/ghostbuster91/0b24d74bb93f4fc3317e9ff06eafeaf8