66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
"""passbook policy task"""
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from multiprocessing import Process
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from multiprocessing.connection import Connection
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from typing import Optional
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from django.core.cache import cache
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from structlog import get_logger
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from passbook.core.models import User
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from passbook.policies.exceptions import PolicyException
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from passbook.policies.models import Policy
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from passbook.policies.types import PolicyRequest, PolicyResult
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LOGGER = get_logger()
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def cache_key(policy: Policy, user: Optional[User] = None) -> str:
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"""Generate Cache key for policy"""
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prefix = f"policy_{policy.pk}"
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if user:
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prefix += f"#{user.pk}"
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return prefix
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class PolicyProcess(Process):
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"""Evaluate a single policy within a seprate process"""
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connection: Connection
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policy: Policy
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request: PolicyRequest
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def __init__(self, policy: Policy, request: PolicyRequest, connection: Connection):
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super().__init__()
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self.policy = policy
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self.request = request
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self.connection = connection
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def run(self):
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"""Task wrapper to run policy checking"""
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LOGGER.debug(
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"P_ENG(proc): Running policy",
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policy=self.policy,
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user=self.request.user,
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process="PolicyProcess",
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)
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try:
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policy_result = self.policy.passes(self.request)
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except PolicyException as exc:
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LOGGER.debug("P_ENG(proc): error", exc=exc)
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policy_result = PolicyResult(False, str(exc))
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# Invert result if policy.negate is set
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if self.policy.negate:
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policy_result.passing = not policy_result.passing
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LOGGER.debug(
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"P_ENG(proc): Finished",
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policy=self.policy,
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result=policy_result,
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process="PolicyProcess",
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passing=policy_result.passing,
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user=self.request.user,
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)
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key = cache_key(self.policy, self.request.user)
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cache.set(key, policy_result)
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LOGGER.debug("P_ENG(proc): Cached policy evaluation", key=key)
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self.connection.send(policy_result)
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