Application.scala

package controllers

import play.api.libs.iteratee.{Enumeratee, Enumerator, Iteratee}
import play.api.mvc._

import scala.concurrent.Future

object Application extends Controller {

  def uploadData = Action.async(uploadDataBodyParser) { request =>
    println(s"Request has finished uploading. File Size: ${request.body}")
    Future.successful {
      Ok(s"Uploaded Successfully, Data Length ${request.body}")
    }
  }

  private def uploadDataBodyParser: BodyParser[Long] = BodyParser("Length Sum Parser") { request =>
    Iteratee.fold[Array[Byte], Long](0) { (state, data) =>
      println("SUM: " + state)
      state + data.length
    }.map(x => Right(x))
  }


}