fn headers_to_canonicalized_string()

in proxy_agent/src/common/hyper_client.rs [395:417]

• 20 lines of code
• 7 McCabe index (conditional complexity)

fn headers_to_canonicalized_string(headers: &hyper::HeaderMap) -> String {
    let mut canonicalized_headers = String::new();
    let separator = String::from(LF);
    let mut map: HashMap<String, (String, String)> = HashMap::new();

    for (key, value) in headers.iter() {
        let key = key.to_string();
        let value = value.to_str().unwrap().to_string();
        let key_lower_case = key.to_lowercase();
        map.insert(key_lower_case, (key, value));
    }

    for key in map.keys().sorted() {
        // skip the expect header
        if key.eq_ignore_ascii_case(constants::AUTHORIZATION_HEADER) {
            continue;
        }
        let h = format!("{}:{}{}", key, map[key].1.trim(), separator);
        canonicalized_headers.push_str(&h);
    }

    canonicalized_headers
}