# Copyright (C) 2016-2019 Virgil Security Inc.
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from virgil_sdk.jwt import Jwt
from virgil_sdk.jwt.abstractions.access_token_provider import AccessTokenProvider
[docs]class CallbackJwtProvider(AccessTokenProvider):
"""
The CallbackJwtProvider class provides an opportunity to get access token using callback mechanism.
"""
def __init__(
self,
get_token_callback # type: function
):
self.__get_token_callback = get_token_callback
[docs] def get_token(self, token_context):
"""
Gets access token by provided callback.
Args:
token_context: Access token context.
Returns:
Instance of access token.
Raises:
ValueError: Token context empty.
"""
if token_context:
return Jwt.from_string(self.__get_token_callback(token_context))
else:
raise ValueError("Empty token context")