def METHOD_NAME(self, headers):
    server_version = headers.get("server", "")
    match = VERSION_REGEX.match(server_version)
    if match is None:
        self.log.debug("Lighttpd server version is Unknown")
        return None, "Unknown"
    full_version = match.group(1)
    server_version = int(match.group(2))
    self.log.debug("Lighttpd server version is %s", server_version)
    return full_version, server_version