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