validators.py 文件源码

def facebook_validation_function(url):
    try:
        url_parts = _get_url_parts(url)
        # check if acceptable domain
        domain = url_parts[1]
        if not (domain == 'facebook.com' or domain.endswith('.facebook.com')):
            return None
        path = _get_initial_path(url_parts)

        # old style numeric profiles
        if path == "profile.php":  # ex. https://www.facebook.com/profile.php?id=100010279981469
            path = parse_qs(url_parts[3]).get('id')[0]
        if path == 'people':  # ex. https://www.facebook.com/people/John-Doe/100013326345115
            path = url_parts[2].strip('/').split('/')[2].lower()

        # TODO: validate against allowed username characteristics
        # https://github.com/project-callisto/callisto-core/issues/181
        if not path or path == "" or path.endswith(
                '.php') or path in generic_fb_urls:
            return None
        else:
            return path
    except ValidationError:
        return None