Jsonp

JSONP helper.

Example of use, provided the following route definition:

  GET  /my-service       Application.myService(callback: String)

The following action definition:

  def myService(callback: String) = Action {
    val json = ...
    Ok(Jsonp(callback, json))
  }

And the following request:

  GET /my-service?callback=foo

The response will have content type “text/javascript” and will look like the following:

  foo({...});

Another example, showing how to serve either JSON or JSONP from the same action, according to the presence of a “callback” parameter in the query string:

  def myService = Action { implicit request =>
    val json = ...
    request.queryString.get("callback").flatMap(_.headOption) match {
      case Some(callback) => Ok(Jsonp(callback, json))
      case None => Ok(json)
    }
  }