Function response_cache_status

http-cache/src/lib.rs:2032–2039

Adds the custom `x-cache` status header to an `http::Response`.

(
    response: &mut Response<B>,
    hit_or_miss: HitOrMiss,
)

fn response_add_warning<B>(
    response: &mut Response<B>,
    url: &Url,
    code: usize,
    message: &str,
) {
    let host = url_host_str(url);
    let escaped_message = message.replace('"', "'").replace(['\n', '\r'], " ");
    let value = format!(
        "{} {} \"{}\" \"{}\"",
        code,
        host,
        escaped_message,