How in the world can I get an header?

[notv1x]

I tried everything, but I'm too dumb to understand how request guards work.
I really need to get the X-Real-IP header as String.

Yes, I have seen documentation and other GitHub Discussion posts. I still can't understand a bit.

Please help me out!

[robertwayne]

Rocket provides a built-in guard for getting the IP Address, see here and here. This - under the hood - defaults to extracting the "X-Real-IP" header.

#[get("/")]
async fn get_ip(ip: std::net::IpAddr) -> String {
    format!("Your IP is: {}", ip)
}

#[launch]
fn rocket() -> _ {
    rocket::build().mount("/", routes![get_ip])
}

However, if you wish to manually extract a header, you have access to .headers() in a request guard (see here). I feel like this example is quite self-explanatory, and could be modified to your use-case quite easily by changing just the header names. If you have questions on that specifically, feel free to ask.