hello world http server (zhttp zio based) using tapir with redoc documentation / published by https://github.com/dacr/code-examples-manager #eb44baa6-35c5-45f4-9002-1de290a653c4/f2651bbac590110fa192dc607a52f61198c98606

tapir-zio-hello-world-4.sc

// summary : hello world http server (zhttp zio based) using tapir with redoc documentation
// keywords : scala, zio, tapir, http, zhttp, swagger, endpoints, @testable, @exclusive
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : eb44baa6-35c5-45f4-9002-1de290a653c4
// created-on : 2023-05-05T17:18:35+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file
// test-with : curl http://127.0.0.1:8080/hello

// ---------------------
//> using scala "3.3.0"
//> using dep "com.softwaremill.sttp.tapir::tapir-zio:1.6.0"
//> using dep "com.softwaremill.sttp.tapir::tapir-zio-http-server:1.6.0"
//> using dep "com.softwaremill.sttp.tapir::tapir-redoc-bundle:1.6.0"
// ---------------------

/*
other examples :
- https://github.com/softwaremill/tapir/blob/master/examples/src/main/scala/sttp/tapir/examples/ZioExampleZioHttpServer.scala
 */

import sttp.tapir.ztapir.*
import sttp.tapir.server.ziohttp.ZioHttpInterpreter
import sttp.apispec.openapi.Info
import sttp.tapir.redoc.bundle.RedocInterpreter
import zio.*, zio.http.Server

/*
curl -L http://127.0.0.1:8080/docs
curl http://127.0.0.1:8080/hello
curl http://127.0.0.1:8080/hi?name=david
 */

object WebApp extends ZIOAppDefault {

  // --------------------------------------------------
  def helloLogic = ZIO.succeed("Hello world")

  val helloEndPoint =
    endpoint
      .description("Returns greeting")
      .get
      .in("hello")
      .out(stringBody)

  val helloRoute = helloEndPoint.zServerLogic[Any](_ => helloLogic)

  // --------------------------------------------------

  def hiLogic(name: String) = ZIO.succeed(s"Hi $name")

  val hiEndPoint =
    endpoint
      .description("Returns parameterized greeting")
      .get
      .in("hi")
      .in(query[String]("name").description("someone name"))
      .out(stringBody)

  val hiRoute = hiEndPoint.zServerLogic[Any](hiLogic)

  // --------------------------------------------------

  val swaggerEndpoints =
    RedocInterpreter()
      .fromServerEndpoints(
        List(helloRoute, hiRoute),
        Info(title = "Greeting API", version = "1.0", description = Some("Everything required to be polite"))
      )

  // --------------------------------------------------

  val routes =
    ZioHttpInterpreter()
      .toHttp(List(helloRoute, hiRoute) ++ swaggerEndpoints) // zioHttpInterpreter(s) can also be merged using <> (orElse)

  // --------------------------------------------------

  override def run = Server.serve(routes.withDefaultErrorResponse).provide(Server.default)

}

WebApp.main(Array.empty)