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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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Directory : /opt/imunify360/venv/lib64/python3.11/site-packages/jwt/

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Current File : //opt/imunify360/venv/lib64/python3.11/site-packages/jwt/jwks_client.py

import json
import urllib.request
from functools import lru_cache
from typing import Any, List

from .api_jwk import PyJWK, PyJWKSet
from .api_jwt import decode_complete as decode_token
from .exceptions import PyJWKClientError


class PyJWKClient:
    def __init__(self, uri: str, cache_keys: bool = True, max_cached_keys: int = 16):
        self.uri = uri
        if cache_keys:
            # Cache signing keys
            # Ignore mypy (https://github.com/python/mypy/issues/2427)
            self.get_signing_key = lru_cache(maxsize=max_cached_keys)(self.get_signing_key)  # type: ignore

    def fetch_data(self) -> Any:
        with urllib.request.urlopen(self.uri) as response:
            return json.load(response)

    def get_jwk_set(self) -> PyJWKSet:
        data = self.fetch_data()
        return PyJWKSet.from_dict(data)

    def get_signing_keys(self) -> List[PyJWK]:
        jwk_set = self.get_jwk_set()
        signing_keys = []

        for jwk_set_key in jwk_set.keys:
            if jwk_set_key.public_key_use == "sig" and jwk_set_key.key_id:
                signing_keys.append(jwk_set_key)

        if len(signing_keys) == 0:
            raise PyJWKClientError("The JWKS endpoint did not contain any signing keys")

        return signing_keys

    def get_signing_key(self, kid: str) -> PyJWK:
        signing_keys = self.get_signing_keys()
        signing_key = None

        for key in signing_keys:
            if key.key_id == kid:
                signing_key = key
                break

        if not signing_key:
            raise PyJWKClientError(
                f'Unable to find a signing key that matches: "{kid}"'
            )

        return signing_key

    def get_signing_key_from_jwt(self, token: str) -> PyJWK:
        unverified = decode_token(token, options={"verify_signature": False})
        header = unverified["header"]
        return self.get_signing_key(header.get("kid"))

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