How to have different representations in Play based on an Accept header?

Question

Using Play Framework 2.1, and I'd like to make small variations in behavior based on the request's Accept header. The only thing I can figure to do is this:

conf/routes

GET  /widgets  controllers.WidgetController.getWidgets()

WidgetController.java

public class LoginController extends Controller {
  public static Result loginUser() {
    if (ctx().request().headers().get("Accept")[0].equals("application/json")) {
      // ... json-specific logic
    }

    // common processing code

    if (ctx().request().headers().get("Accept")[0].equals("application/json")) {
      return ok();
    } else {
      return redirect(...);
    }
  }
}

Seems very nasty and procedural. Any suggestions on the idiomatic "Play" way to do this?

Answer 1

You can test if request().accepts("application/json“) but checking with if-else for every content-type seems to be the standard way.