def authenticate(self, **credentials):
try:
username = credentials['username']
password = credentials['password']
except KeyError:
return None
t = int(time.time())
salt = User._get_user_salt(login_name=username, t=t)
if salt is None:
return None
user = User._get_user(login_name=username,
login_password=password,
t=t,
salt=salt)
if user is None:
return None
# 缓存用户信息
cache.hset('user:user', user.user_id, json.dumps(user._raw_objects))
return user
