model.py 文件源码

def _ensure_cookie_secret():
    """Makes sure cookie secret is cached."""
    global _cookie_master_secret
    entry = _db.config.find_one({'_id': 'cookie_master_secret'})
    if not entry:
        tmp_cookie_master_secret = misc_util.generate_random_id(length=32)
        try:
            entry = {
                '_id': 'cookie_master_secret',
                'value': tmp_cookie_master_secret,
            }
            _db.config.insert_one(entry)
        except pymongo.errors.DuplicateKeyError:
            entry = _db.config.find_one({'_id': 'cookie_master_secret'})
    assert entry
    _cookie_master_secret = entry['value']