How can my Play 2 app respond to different “Accept” headers from the client?

Question

In Rails, I was able to do something similar to the following:

respond_to do |format|
  format.xml { ... }
  format.json { ... }
end

and the ap

Answer 1

I have just released a Play! 2.0 module for content negotiation called mimerender (http://github.com/martinblech/play-mimerender).

The idea is that you have to define a mapping from your domain classes to different representations:

val m = mapping(
  "text/html" -> { s: String => views.html.index(s) },
  "application/xml" -> { s: String => {s} },
  "application/json" -> { s: String => toJson(Map("message" -> toJson(s))) },
  "text/plain" -> identity[String]_
)

Once you have done that once, you can reuse that mapping throughout all your controllers:

object Application extends Controller {
  def index = Action { implicit request =>
    m.status(200)("Hello, world!")
  }
}

Please note it's a very early release and has only been tested on Play 2.0.4