Spry/examples/UserContentComponent.vala

class UserContentComponent : Component {
    public override string markup { get; }

    private HttpContext http_context = inject<HttpContext>();

    public async override void handle_action(string action) throws Error {
        this["message"].text_content = http_context.request.query_params.get_any_or_default("message") ?? "No message provided!";
        this["action"].text_content = action;
    }
}