HTTP server Middleware

[Arkady-Dymkov]

HTTP server Middleware

[eduard-vasinskyi]

Hi, @Arkady-Dymkov

You can find documentation/examples about HTTP module here. There are also examples for using RoutingServlet.

To wrap a response into a custom response you can create an AsyncServlet which wraps another AsyncServlet and then customize the response. You can add a custom exception handler the same way:

AsyncServlet mainServlet = createMainServlet();
AsyncServlet exceptionHandlingServlet = request ->
     mainServlet.serveAsync(request)
           .map((httpResponse, e) -> {
              if (e != null) {
                 // do something with exception or return a different response


                 return HttpResponse.ofCode(400).withPlainText("Bad request");
              }


              return httpResponse;
           });

[ints-hiro]

1. You can see example about error handler at my repo: https://github.com/anboo44/activej-real-world-example/blob/master/src/main/java/com/uet/example/api/ServletCenter.java
2. Wrap response to custom type:

• Define common method in baseController: https://github.com/anboo44/activej-real-world-example/blob/feature/test-hibernate/src/main/java/com/uet/example/api/controller/BaseController.java
• Use method success at controller to wrap response:

public Promise<HttpResponse> list(HttpRequest request) {
        return userRepository.getAll().map(
            records -> records.stream().map(UserDTO::apply).toList()
        ).map(this::success);
    }

Or: Add custom response at route config

[Arkady-Dymkov]

Thank you! I'll close an issue)