ZioHttp end point - Return json response - scala

Question

I am creating a ZioHttp Rest endpoint...
For a Json request I want to return Json response ...
I'm able to retrun logs, print lines but not sure how to return json response...
Here's my code:
import zio.{Console, _}
import zhttp._
import zhttp.http._
import zhttp.service.Server
import zio.json.{DeriveJsonEncoder, JsonEncoder}
//import java.io.Console
object ZioHttp extends ZIOAppDefault {
val port = 9000
val app: Http[Any, Nothing, Request, Response] = Http.collect[Request] {
case Method.GET -> !! / "zioCollector" => Response.text("Hello, Http server This is Mohammed Mukhtar Ali!!")
}
case class Events(experimentId: String,
variantId: String,
accountId: String,
deviceId: String,
date: Int)
object Events {
implicit val encoder: JsonEncoder[Events] = DeriveJsonEncoder.gen[Events]
}
val zApp: UHttpApp = Http.collectZIO[Request] {
case Method.POST -> !! / "zioCollector" =>
Random.nextIntBetween(3, 5).map(n => Response.text("Hello " * n + "server2!"))
}
// val zApp2: UHttpApp = Http.collectZIO[Request] {
// case Method.POST -> !! / "zioCollector" =>
// Random.nextIntBetween(3, 5).map(n => Response.json()
// }
val combied = app ++ zApp
val httpProgram = for {
_ <- Console.printLine(s"Starting server at http://localhost:$port")
_ <- Server.start(port, combied)
} yield ()
override def run = httpProgram
}
I'm a beginner with Zio and scala, appreatiate any help proided!

Answer 1

Not an expert for zio-http (nor zio in general), but this code works for me:
import zhttp.*
import zhttp.http.*
import zhttp.service.Server
import zio.json.*
import zio.Console
import zio.*
object ZioHttp extends ZIOAppDefault {
val port = 9000
case class Events(
experimentId: String,
variantId: String,
accountId: String,
deviceId: String,
date: Int
)
object Events {
implicit val encoder: JsonEncoder[Events] = DeriveJsonEncoder.gen[Events]
}
val exampleEvents =
Events(
"someExperimentId",
"someVariantId",
"someAccountId",
"someDeviceId",
42
)
val zApp: UHttpApp = Http.collectZIO[Request] {
case Method.GET -> !! / "exampleEvents" =>
ZIO.succeed(Response.json(exampleEvents.toJson))
}
val httpProgram = for {
_ <- Console.printLine(s"Starting server at http://localhost:$port")
_ <- Server.start(port, zApp)
} yield ()
override def run = httpProgram
}