Akka-http异常处理(Scala)

import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.http.scaladsl.server.Directives._
import akka.http.scaladsl.server._
import akka.stream.ActorMaterializer

object ExceptionHandlingExample extends App {
  implicit val system = ActorSystem()
  implicit val materializer = ActorMaterializer()
  implicit val executionContext = system.dispatcher

  val route =
    path("divide") {
      get {
        parameter("a".as[Int], "b".as[Int]) { (a, b) =>
          if (b == 0) throw new ArithmeticException("/ by zero")
          complete(HttpEntity(ContentTypes.`text/html(UTF-8)`, s"<h1>${a / b}</h1>"))
        }
      }
    } ~
    handleExceptions(exceptionHandler)

  val exceptionHandler = ExceptionHandler {
    case e: ArithmeticException =>
      complete(StatusCodes.BadRequest, s"An arithmetic error occurred: ${e.getMessage}")
    case e: Exception =>
      complete(StatusCodes.InternalServerError, s"An unexpected error occurred: ${e.getMessage}")
  }

  Http().bindAndHandle(route, "localhost", 8080)
  println(s"Server online at http://localhost:8080/")
}