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import time
from typing import Optional
from .api_jwk import PyJWKSet, PyJWTSetWithTimestamp
class JWKSetCache:
def __init__(self, lifespan: int) -> None:
self.jwk_set_with_timestamp: Optional[PyJWTSetWithTimestamp] = None
self.lifespan = lifespan
def put(self, jwk_set: PyJWKSet) -> None:
if jwk_set is not None:
self.jwk_set_with_timestamp = PyJWTSetWithTimestamp(jwk_set)
else:
# clear cache
self.jwk_set_with_timestamp = None
def get(self) -> Optional[PyJWKSet]:
if self.jwk_set_with_timestamp is None or self.is_expired():
return None
return self.jwk_set_with_timestamp.get_jwk_set()
def is_expired(self) -> bool:
return (
self.jwk_set_with_timestamp is not None
and self.lifespan > -1
and time.monotonic()
> self.jwk_set_with_timestamp.get_timestamp() + self.lifespan
)