Scala Filter

BodyFilter.scala

import javax.inject.Inject

import play.api.libs.concurrent.Execution.Implicits.defaultContext
import play.api.libs.json.{JsObject, JsString, Json}
import play.api.mvc._

import scala.concurrent.Future

class BodyFilter @Inject()() extends Filter {

  def apply(nextFilter: RequestHeader => Future[Result])
           (requestHeader: RequestHeader): Future[Result] = {

    nextFilter(requestHeader).map { result =>

      val x = result.body.map { data =>
        val h = Json.parse(data).asInstanceOf[JsObject] + ("server" -> JsString("1.0"))
        h.toString().getBytes
      }

      result.copy(body = x)
    }
  }
}