utils.py 文件源码

def get_draft_url(url):
    """
    Return the given URL with a draft mode HMAC in its querystring.
    """
    if verify_draft_url(url):
        # Nothing to do. Already a valid draft URL.
        return url
    # Parse querystring and add draft mode HMAC.
    url = urlparse.urlparse(url)
    salt = get_random_string(5)
    # QueryDict requires a bytestring as its first argument
    query = QueryDict(force_bytes(url.query), mutable=True)
    query['edit'] = '%s:%s' % (salt, get_draft_hmac(salt, url.path))
    # Reconstruct URL.
    parts = list(url)
    parts[4] = query.urlencode(safe=':')
    return urlparse.urlunparse(parts)