playframework, can you route on hostname/subdomains?

Question

We are porting a seam app(2 apps) to one play app to test out play right now(well, porting harder scenarios...so far, so good).

We would like to be able to route on

Answer 1

I think virtual hosting via the routes file is in play version 2.x not available anymore.

But what you can do is preparing a controller for proxying such requests. Here is my sample code which is working in play 2.8.x:

@Singleton
class VirtualHostsController @Inject() (
  langs: Langs,
  ccs: ControllerComponents
) extends AbstractController(ccs) with I18nSupport {

  private val logger = Logger(classOf[VirtualHostsController])

  def index() = Action { implicit request =>
    logger.info(s"Handling Virtual Hosts for ${request.host}")

    request.host match {
      case "localhost:9000" => Redirect(routes.SomeController.show())
      case "sub.domain.tld" => Redirect(routes.OtherController.show())
      case _ => InternalServerError("unknown domain")
    }
  }

}

And in the routes file you can write something like that:

GET     /                  controllers.VirtualHostsController.index()

Answer 2

Some of the docs are more difficult to find for play. I couldn't find this in any of the real documentation but remembered it being part of a release...

http://www.playframework.org/documentation/1.1/releasenotes-1.1#routeHost

---

Virtual hosting in routes

The routes file now supports Host matching. this can be useful if action parameters must be extracted from the host parameter. For example, for a SAAS application, you could use:

GET    {client}.mysoftware.com/         Application.index

and then automatically retrieve the client value as for any other request parameter:

public static void index(String client) {
    // ...
}