Play JSON example. Parse post json body using the body parser, use implicit format to convert it to case class and then send back json response

gistfile1.scala

package controllers

import play.api._
import play.api.mvc._
import play.api.libs.json._

object Application extends Controller {
  
  def index = Action {
    Ok(views.html.index("Your new application is ready."))
  }

 
  case class Foo(one: String, two: Int)
  //format object used to convert json to case class Foo 
  implicit val fooFormat: Format[Foo] = Json.format[Foo]

  def handleJsonRequest = Action(BodyParsers.parse.json) { request =>
    //using the body parser to parse request body to json
    val jsonBody: JsValue = request.body
    //converting json to case class
    val foo : Foo = jsonBody.as[Foo]
    println(s"case class ${foo}")
    //making some modification to case class
    val anotherFoo = foo.copy(one = "This is a new value")
    //converting back to json
    val anotherJson: JsValue = Json.toJson(anotherFoo)
    //sending the json response
    Ok(anotherJson)
  }
  
}