code: @RequestHandler(patterns = "/form,/form/**")
      public void onPost(Request.In.Post event, IOSubchannel channel) {
          FormContext ctx = channel
              .associated(this, FormContext::new);
          ctx.request = event.httpRequest();
          ctx.session = event.associated(Session.class).get();
          event.setResult(true);
          event.stop();
      }
docs: Handle a `POST` request.
  
  @param event the event
  @param channel the channel