title: return content from S3 in Playframework 2.5 (scala)
body: <p>In Playframework 2.4.X I retorn content from S3 this:</p>
  
  <pre><code>  val s3Client = new AmazonS3Client()
    val s3doc = s3Client.getObject(new GetObjectRequest(bucketName, key))
    val stream = s3doc.getObjectContent
  
    Ok.feed(Enumerator.fromStream(stream)).as(contentType)
  </code></pre>
  
  <p>But now in play 2.5 .feed is @deprecated("Use sendEntity with a Streamed entity instead"</p>
  
  <p>I suppose that is something like this:</p>
  
  <pre><code>Ok.sendEntity(HttpEntity.Streamed(stream, None, None))
  </code></pre>
  
  <p>But I need transform stream to Source[ByteString, _] </p>
  
  <p>How do I do this?</p>