Начало работы с Vert.x

class MainVerticle : VerticleBase() {
  override Future<*> start() {
    // Create a Router
    val router = Router.router(vertx)
 
    // Mount the handler for all incoming requests at every path and HTTP method
    router.route().handler { context ->
      // Get the address of the request
      val address = context.request().connection().remoteAddress().toString()
      // Get the query parameter "name"
      val queryParams = context.queryParams()
      val name = queryParams.get("name") ?: "unknown"
      // Write a json response
      context.json(
          json {
            obj(
              "name" to name,
              "address" to address,
              "message" to "Hello $name connected from $address"
            )
          }
      )
    }
 
    // Create the HTTP server
    return vertx.createHttpServer()
        // Handle every request using the router
        .requestHandler(router)
        // Start listening
        .listen(8888)
        // Print the port
        .onSuccess { server ->
          println("HTTP server started on port " + server.actualPort())
        }
  }
}

$ curl -v http://localhost:8888
*   Trying ::1:8888...
* Connected to localhost (::1) port 8888 (#0)
> GET / HTTP/1.1
> Host: localhost:8888
> User-Agent: curl/7.69.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< content-type: application/json; charset=utf-8
< content-length: 115
<
* Connection #0 to host localhost left intact
{"name":"unknown","address":"0:0:0:0:0:0:0:1:59610","message":"Hello unknown connected from 0:0:0:0:0:0:0:1:59610"}
 
$ curl -v http://localhost:8888\?name\="Francesco"
*   Trying ::1:8888...
* Connected to localhost (::1) port 8888 (#0)
> GET /?name=Francesco HTTP/1.1
> Host: localhost:8888
> User-Agent: curl/7.69.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< content-type: application/json; charset=utf-8
< content-length: 119
<
* Connection #0 to host localhost left intact
{"name":"Francesco","address":"0:0:0:0:0:0:0:1:59708","message":"Hello Francesco connected from 0:0:0:0:0:0:0:1:59708"}