Trying to set up CORS headers for static files in Mojo

gistfile1.txt

sub startup {
  my $self = shift;

  # Router
  my $r = $self->routes;
  my $log = $self->log;

  # Normal route to controller
  $r->get('/')->to('example#welcome');

  $self->hook( after_static => sub {
    my $c = shift;

    my $req_headers = $c->req->headers;
    $log->append("Processing after static hook.\n");
    $log->append(Dumper $req_headers );

    my $origin = $req_headers->origin;
    $log->append("Origin header is $origin.\n");
    return 1 unless defined $origin;

    if ( $origin =~ /tutchy/ ) {
      $log->append("Origin matches adding CORS\n");
      $c->res->headers->vary('Origin');
      $c->res->headers->append('Access-Control-Allow-Origin', $origin );

      return 1;
    }

    $c->res->content( Mojo::Content::Single->new );
    $c->rendered(400);

  } );
}