taiko 0.1.37

A composable web server
Documentation 
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use std::fmt::{Display, Formatter};
use crate::body::Empty;
use crate::Request;
use crate::request::Extract;

pub struct ClientIp(String);

impl From<String> for ClientIp {
    fn from(value: String) -> Self {
        ClientIp(value)
    }
}

impl Clone for ClientIp {
    fn clone(&self) -> Self {
        ClientIp(self.0.clone())
    }
}

impl Display for ClientIp {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

impl<S> Extract<S> for ClientIp {
    type Error = Empty;

    fn extract(request: &Request, _: &S) -> impl Future<Output=Result<Self, Self::Error>> {
        let ip_address = request
            .extensions()
            .get::<ClientIp>()
            .map(|client| client.0.clone())
            .unwrap_or_else(|| String::from("<Unknown IP>"));

        async {
            Ok(ClientIp(ip_address))
        }
    }
}