Function validate_email

validify/src/validation/email.rs:22–55

(val: T)

/// that are unfamiliar to most users.
#[must_use]
pub fn validate_email<T>(val: T) -> bool
where
    T: AsRef<str>,
{
    let val = val.as_ref();
    if val.is_empty() || !val.contains('@') {
        return false;
    }
    let parts: Vec<&str> = val.rsplitn(2, '@').collect();
    let user_part = parts[1];
    let domain_part = parts[0];

    // validate the length of each part of the email, BEFORE doing the regex
    // according to RFC5321 the max length of the local part is 64 characters
    // and the max length of the domain part is 255 characters
    // https://datatracker.ietf.org/doc/html/rfc5321#section-4.5.3.1.1
    if user_part.len() > 64 || domain_part.len() > 255 {
        return false;
    }

    if !EMAIL_USER_RE.is_match(user_part) {
        return false;
    }

    if !validate_domain_part(domain_part) {
        // Still the possibility of an [IDN](https://en.wikipedia.org/wiki/Internationalized_domain_name)
        return match domain_to_ascii(domain_part) {
            Ok(d) => validate_domain_part(&d),
            Err(_) => false,
        };
    }

    true
}

/// Checks if the domain is a valid domain and if not, check whether it's an IP
#[must_use]