Setting base url

BaseUrlHandler.groovy

class BaseUrlHandler implements Handler {

  void handle(Context context) throws Exception {
    context.with {

      def headers = request.headers
      def scheme = headers.contains('X-Forwarded-Proto') ? headers.get('X-Forwarded-Proto') : 'http'
      def domain = headers.get('Host') ?: headers.get('host')

      def baseUrl = "${scheme}://${domain}" as String

      request.register(BaseUrl, new BaseUrl(baseUrl))

      next()
    }
  }
}