Additionally, how do you think similar feature, HttpRequest.ofJson?
Additionally, how about adding HttpRequest.ofJson also?

+1 to having HttpRequest.ofJson() as well.

It would also be nice to have APIs that automatically convert a response into an object.

• Content-Type
  • We can support well-known media types such as:
    • "application/json"
    • "application/protobuf" (We can add this later cause Protobuf is not a popular format for REST.)
  • An UnsupportedMediaTypeException could complete the returned future for unknown media types.
  • An JsonProcessingException could complete the returned future
    when failing to decode a JSON in response body into an object.
• Status
  • The default expected HTTP response is 200 OK. If another status is received;
  • UnexpectedHttpStatusException could complete the returned future.
  • Alternatively, an additional API that can specify an expected HTTP status.

interface HttpResponse {
  <T> CompletableFuture<T> aggregateAs(Class<? extends T> clazz);
  <T> CompletableFuture<T> aggregateAs(HttpStatus expectedStatus, Class<? extends T> clazz);
  <T> CompletableFuture<T> aggregateAs(HttpStatus expectedStatus, Class<? extends T> clazz, EventExecutor executor);
}

I'm interested in this!

Thanks! It's all yours.