ZIO example

build.sbt

@@ -188,9 +188,12 @@ lazy val playground: Project = (project in file("playground"))
     name := "tapir-tests",
     libraryDependencies ++= Seq(
       "com.softwaremill.sttp" %% "akka-http-backend" % sttpVersion,
+      "org.scalaz" %% "scalaz-zio" % "1.0-RC4",
+      "org.scalaz" %% "scalaz-zio-interop-cats" % "1.0-RC4",
+      "org.typelevel" %% "cats-effect" % "1.2.0",
       "org.webjars" % "swagger-ui" % "3.22.0"
     ),
     libraryDependencies ++= loggerDependencies,
     publishArtifact := false
   )
-  .dependsOn(akkaHttpServer, sttpClient, openapiCirceYaml, openapiDocs, circeJson)
+  .dependsOn(akkaHttpServer, http4sServer, sttpClient, openapiCirceYaml, openapiDocs, circeJson)

playground/src/main/scala/tapir/example/zio/ZioExample.scala

@@ -0,0 +1,39 @@
+package tapir.example.zio
+
+import tapir._
+import tapir.server.http4s._
+import org.http4s._
+import org.http4s.syntax.kleisli._
+import org.http4s.server.Router
+import org.http4s.server.blaze.BlazeServerBuilder
+import scalaz.zio.{DefaultRuntime, IO, Task, UIO}
+import scalaz.zio.interop.catz._
+import scalaz.zio.interop.catz.implicits._
+
+object ZioExample extends App {
+
+  implicit class ZioEndpoint[I, E, O](e: Endpoint[I, E, O, EntityBody[Task]]) {
+    def toZioRoutes(logic: I => IO[E, O])(implicit serverOptions: Http4sServerOptions[Task]): HttpRoutes[Task] = {
+      import tapir.server.http4s._
+      e.toRoutes(i => logic(i).either)
+    }
+  }
+
+  def countCharacters(s: String): UIO[Int] = UIO.succeed(s.length)
+
+  val countCharactersEndpoint: Endpoint[String, Unit, Int, Nothing] = endpoint.in(stringBody).out(plainBody[Int])
+  def service: HttpRoutes[Task] = countCharactersEndpoint.toZioRoutes(countCharacters _)
+
+  {
+    implicit val runtime: DefaultRuntime = new DefaultRuntime {}
+
+    val serve = BlazeServerBuilder[Task]
+      .bindHttp(8080, "localhost")
+      .withHttpApp(Router("/" -> service).orNotFound)
+      .serve
+      .compile
+      .drain
+
+    runtime.unsafeRun(serve)
+  }
+}