hello, If you have special requirements with HTTP parameter handling (<https://www.iana.org/assignments/http-parameters/http-parameters.xhtml>) I recommend you use a reverse proxy (it will also bring HTTP/2, security, buffering, TLS certificates, and more...). Myself, I used to use nginx, but have converted to Caddy (<https://caddyserver.com/>) lately.
If by HTTP parameters you mean HTML query parameters, they are not part of HTTP spec and therefore out of scope for HTTP servers. However, I just pushed bindings for uriparser to GitHub, so you can use it with any server: <https://github.com/olliNiinivaara/uriparser-nimbinding> If async requirement is not a _sine qua non_ for you, I suggest you to check out [GuildenStern](https://github.com/olliNiinivaara/GuildenStern), too.
