// Netty HTTP server
final HttpServer httpServer = HttpServer.create()
.............................
.route(routes -> routes
.............................
.options("http://mysite.site/reports", // CORS
(req, resp) -> resp
.addHeader(ACCESS_CONTROL_ALLOW_ORIGIN, "*")
.addHeader(ACCESS_CONTROL_ALLOW_HEADERS, "*")
.sendString(Mono.just("")))
...........................
);