Parse cookies

parse_cookies.rs

#[derive(Debug, Clone)]
struct BadCookie;
type CookieResult<T> = std::result::Result<T, BadCookie>;

#[derive(Debug)]
struct Cookies<'a> {
    cookies: HashMap<&'a str, &'a str>,
}

impl<'a> Cookies<'a> {
    fn from(item: &str) -> CookieResult<Cookies> {
        let cookies = item
            .split(" ")
            .into_iter()
            .map(|kv| {
                let mut split = kv.split("=");
                Ok((
                    split.next().ok_or(BadCookie)?,
                    split.next().ok_or(BadCookie)?,
                ))
            })
            .collect::<CookieResult<HashMap<&str, &str>>>()?;

        Ok(Cookies { cookies })
    }
}