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# ------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
# -------------------------------------------------------------------------
from datetime import datetime, timedelta, timezone
from dateutil import parser
def is_token_expiration_within_allowed_deviation(
expected_token_expiration,
token_expires_in,
allowed_deviation = 0.05
):
# type: (timedelta, datetime, float) -> bool
utc_now = datetime.now(timezone.utc)
token_expiration = parser.parse(token_expires_in)
token_expiration_in_seconds = (token_expiration - utc_now).total_seconds()
expected_seconds = expected_token_expiration.total_seconds();
time_difference = abs(expected_seconds - token_expiration_in_seconds)
allowed_time_difference = expected_seconds * allowed_deviation
return time_difference < allowed_time_difference
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