Advanced usage: return to requested page after login

Returning to the originally requested page after login

When an unauthenticated user requests access to page requiring authentication, you first redirect the user to the login page, then, after the user successfully logs in, you redirect the user to the page they originally requested.

To achieve this change authenticationFailed and loginSucceeded:

trait AuthConfigImpl extends AuthConfig {

  // Other settings are omitted.

  def authenticationFailed(request: RequestHeader): Result =
    Redirect(routes.Application.login).withSession("access_uri" -> request.uri)

  def loginSucceeded(request: RequestHeader): Result = {
    val uri = request.session.get("access_uri").getOrElse(routes.Message.main.url.toString)
    Redirect(uri).withSession(request.session - "access_uri")
  }

}