Json As Writeable Scala Play Framework

Question

I am trying to take an http request and send it to another service. I want to use the json sent from the first POST and send it on to the next service. The problem I am having is turning the POST data as json and put it into a new POST but it is not Play's type Writeable.

Here is the code:

def postProxyParse(proxyUrl: String) = Action.async { request =>
    var url = buildUrl(request.uri)
    val data = request.body.asJson
    if(url ==""){
      badRequest(null, "Url Not matching proxy possibilities")
    }
    WS.url(url).post(data).map { response =>
       Ok(response.body)
    }
}

The Error I am getting is Cannot write an instance of Option[play.api.libs.json.JsValue] to HTTP response. Try to define a Writeable[Option[play.api.libs.json.JsValue]]

Your code as written is not producing that error. Are you sure you didn't write Ok(data) or Ok(response.body.asJson)? — wingedsubmariner
– wingedsubmariner, Commented Jun 18, 2014 at 13:31
@wingedsubmariner You're right my bad If you look now the error is being thrown at the post when I am trying to pass the data to the new service — ford prefect
– ford prefect, Commented Jun 18, 2014 at 13:38
Try val data = request.body.asJson.getOrElse(badRequest(null, "Bad JSON")). — wingedsubmariner
– wingedsubmariner, Commented Jun 18, 2014 at 14:11
@wingedsubmariner I added what ended up working... not sure if you would be interested — ford prefect
– ford prefect, Commented Jun 19, 2014 at 15:50

ford prefect · Accepted Answer · 2014-06-18 20:43:56Z

1

Hi so the point of this was to create a proxy service to redirect post requests with a specific url. The answer to this problem is:

  def postProxyParse(proxyUrl: String) = Action.async { request =>
val url = buildUrl(request.uri)
var data = Json.parse(request.body.asText.get);
if(url ==""){
  badRequest(null, "Url Not matching proxy possibilities")
}
WS.url(url).withHeaders(  "Accept" -> "application/json",
  "Cookie" -> ("sessionId=" + request.cookies.apply("sessionId").value)).post(data).map { response =>
  Ok(data)
}
}

The full code for a scala proxy service is here

answered Jun 18, 2014 at 20:43

ford prefect

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