py.lib: webapp/jwt_util.py annotate

* С разбегу влетел в type hinting, пришлось обкладывать костылями. И этот процесс судя по всему длительный, и место больное будет долго...

awgur@31	1 # coding: utf-8
awgur@31	2
awgur@31	3 import jwt
awgur@31	4 from datetime import datetime, timedelta
awgur@31	5 from typing import Optional
awgur@31	6
awgur@31	7
awgur@31	8 JWT_HASH_ALGO = 'HS512'
awgur@31	9
awgur@31	10
awgur@31	11 class JWTError(Exception):
awgur@31	12 pass
awgur@31	13
awgur@31	14
awgur@31	15 class JWTAuthError(JWTError):
awgur@31	16 """\
awgur@31	17 Провалена проверка токена на допустимость по подписи времени или прочее
awgur@31	18 """
awgur@31	19
awgur@31	20
awgur@31	21 class JWTHelper(object):
awgur@31	22 def __init__(self, key: str):
awgur@31	23 self.key = key
awgur@31	24
awgur@31	25 def encode(self, data: dict, timeout: Optional[int] = None) -> str:
awgur@31	26 if timeout is not None:
awgur@31	27 data['exp'] = datetime.utcnow() + timedelta(seconds=timeout)
awgur@31	28
awgur@31	29 return jwt.encode(data, key=self.key, algorithm=JWT_HASH_ALGO)
awgur@31	30
awgur@31	31 def decode(self, token: str, check_timeout: bool = False) -> dict:
awgur@31	32 opts = {
awgur@31	33 'algorithms': [JWT_HASH_ALGO, ]
awgur@31	34 }
awgur@31	35
awgur@31	36 if check_timeout:
awgur@31	37 opts['options'] = {'require': {'exp'}}
awgur@31	38
awgur@31	39 if token is None:
awgur@31	40 raise JWTAuthError('Ключ отсутствует')
awgur@31	41 else:
awgur@31	42 token = token.encode('utf-8')
awgur@31	43
awgur@31	44 try:
awgur@31	45 return jwt.decode(jwt=token, key=self.key, **opts)
awgur@31	46
awgur@31	47 except (jwt.InvalidIssuerError, jwt.InvalidSignatureError, jwt.ExpiredSignatureError) as e:
awgur@31	48 raise JWTAuthError(str(e))
awgur@31	49
awgur@31	50 except jwt.PyJWTError as e:
awgur@31	51 raise JWTError(f'{type(e).__name__}: {e}')
awgur@31	52
awgur@31	53 @classmethod
awgur@31	54 def make_cls_fabric(cls, key: str):
awgur@31	55 def f():
awgur@31	56 return cls(key=key)
awgur@31	57
awgur@31	58 return f

py.lib

py.lib/webapp/jwt_util.py