Get the JSON from HttpEntity

Question

I am using akka.http.scaladsl.model.HttpResponse, HttpEntity.

After getting the response , it is of type responseEntity of the format (Content-type: 'application/json', {MyJSONHERE}). Is there a way I can extract my json from the entity.

I tried entity.getDataBytes which gives the content of the entity in ByteString format. I want to properly read the JSON and parse it. Can someone guide me on this?

Related - https://stackoverflow.com/q/32315789/864369 – Dan W Jul 19 '17 at 14:24 — Dan W, Jul 19 '17 at 14:24

kardapoltsev · Accepted Answer · 2017-07-21T07:02:19.320

5

Code below works for me

entity.dataBytes.runWith(Sink.fold(ByteString.empty)(_ ++ _)).map(_.utf8String) map { result =>
  JsonMethods.parse(result)
}

dataBytes returns Source[ByteString, Any], Sink.fold combines all parts of the stream into one ByteString and utf8String converts ByteString into usual String.

Here is some useful docs about HttpEntity.

edited Jul 21 '17 at 07:02

answered Jul 21 '17 at 06:56

kardapoltsev

1,053
8
14

score 1 · Answer 2 · answered Jul 19 '17 at 14:36

1

Can you try below code?

entity.getDataBytes.utf8String

That would return String representation of JSON.

answered Jul 19 '17 at 14:36

Abdhesh kumar

97
1
5

utfString is not getting recognized as a valid function – Nagireddy Hanisha Jul 19 '17 at 16:01
1

for an accessing `utf8String`, `entity.getDataBytes` must return ByteString and ByteString class has utf8String function. – Abdhesh kumar Jul 20 '17 at 09:00
you are using `utfString` not `utf8String` – Abdhesh kumar Jul 20 '17 at 09:04

Get the JSON from HttpEntity

2 Answers2