out.write_all(
            format!(
                "{:?} {} {}\r\n",
                resp.version(),
                resp.status().as_u16(),
                resp.status().as_str()
            )
            .as_bytes(),
        )
        .await?;

        out.write_all(format!("{:?} {}", resp.version(), resp.status().as_u16(),).as_bytes())
            .await?;
        if let Some(reason) = resp.status().canonical_reason() {
            out.write_all(format!(" {}", reason).as_bytes()).await?;
        }
        out.write_all(b"\r\n").await?;