fn validate_and_fixup_origin()

in components/logins/src/login.rs [375:423]

• 40 lines of code
• 9 McCabe index (conditional complexity)

    fn validate_and_fixup_origin(origin: &str) -> Result<Option<String>> {
        // Check we can parse the origin, then use the normalized version of it.
        match Url::parse(origin) {
            Ok(mut u) => {
                // Presumably this is a faster path than always setting?
                if u.path() != "/"
                    || u.fragment().is_some()
                    || u.query().is_some()
                    || u.username() != "/"
                    || u.password().is_some()
                {
                    // Not identical - we only want the origin part, so kill
                    // any other parts which may exist.
                    // But first special case `file://` URLs which always
                    // resolve to `file://`
                    if u.scheme() == "file" {
                        return Ok(if origin == "file://" {
                            None
                        } else {
                            Some("file://".into())
                        });
                    }
                    u.set_path("");
                    u.set_fragment(None);
                    u.set_query(None);
                    let _ = u.set_username("");
                    let _ = u.set_password(None);
                    let mut href = String::from(u);
                    // We always store without the trailing "/" which Urls have.
                    if href.ends_with('/') {
                        href.pop().expect("url must have a length");
                    }
                    if origin != href {
                        // Needs to be fixed up.
                        return Ok(Some(href));
                    }
                }
                Ok(None)
            }
            Err(e) => {
                breadcrumb!(
                    "Error parsing login origin: {e:?} ({})",
                    error_support::redact_url(origin)
                );
                // We can't fixup completely invalid records, so always throw.
                Err(InvalidLogin::IllegalOrigin.into())
            }
        }
    }