generated from coulomb/repo-seed
86 lines
2.8 KiB
Python
86 lines
2.8 KiB
Python
"""Development-only file backend for Audit Core.
|
|
|
|
Writes hourly JSONL files under ``/tmp/audit-core`` by default. See
|
|
``docs/audit-backend-contract.md`` for retention guarantees and the migration
|
|
path to durable archive backends.
|
|
"""
|
|
|
|
from __future__ import annotations
|
|
|
|
import json
|
|
import os
|
|
from datetime import datetime, timedelta, timezone
|
|
from pathlib import Path
|
|
|
|
from audit_core.interface import AuditEvent, EventValidationError, RetentionPolicy, validate_event
|
|
|
|
|
|
class MockFileAuditBackend:
|
|
"""Append audit events to hourly JSONL files and clean up old files.
|
|
|
|
Implements :class:`~audit_core.interface.AuditBackend` with
|
|
``custody_class=development``. Not suitable for production audit custody.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
base_dir: str | Path | None = None,
|
|
retention_days: int | None = None,
|
|
now: datetime | None = None,
|
|
) -> None:
|
|
self.base_dir = Path(base_dir or os.environ.get("AUDIT_CORE_MOCK_DIR", "/tmp/audit-core"))
|
|
self.retention_days = int(
|
|
retention_days
|
|
if retention_days is not None
|
|
else os.environ.get("AUDIT_CORE_MOCK_RETENTION_DAYS", "7")
|
|
)
|
|
self._now = now
|
|
|
|
@property
|
|
def retention_policy(self) -> RetentionPolicy:
|
|
days = self.retention_days if self.retention_days >= 0 else None
|
|
return RetentionPolicy(
|
|
custody_class="development",
|
|
retention_days=days,
|
|
immutable=False,
|
|
tamper_evidence=False,
|
|
durable=False,
|
|
)
|
|
|
|
def emit(self, event: AuditEvent) -> str:
|
|
try:
|
|
validate_event(event)
|
|
except EventValidationError as exc:
|
|
raise ValueError(str(exc)) from exc
|
|
|
|
self.base_dir.mkdir(parents=True, exist_ok=True)
|
|
self.cleanup_old_files()
|
|
path = self.current_path()
|
|
record = event.as_record()
|
|
with path.open("a", encoding="utf-8") as handle:
|
|
handle.write(json.dumps(record, sort_keys=True, separators=(",", ":")) + "\n")
|
|
return str(path)
|
|
|
|
def cleanup_old_files(self) -> list[str]:
|
|
if self.retention_days < 0 or not self.base_dir.exists():
|
|
return []
|
|
|
|
cutoff = self.now() - timedelta(days=self.retention_days)
|
|
removed: list[str] = []
|
|
for path in self.base_dir.glob("audit-*.jsonl"):
|
|
try:
|
|
modified = datetime.fromtimestamp(path.stat().st_mtime, tz=timezone.utc)
|
|
except FileNotFoundError:
|
|
continue
|
|
if modified < cutoff:
|
|
path.unlink(missing_ok=True)
|
|
removed.append(str(path))
|
|
return removed
|
|
|
|
def current_path(self) -> Path:
|
|
stamp = self.now().strftime("%Y%m%dT%H")
|
|
return self.base_dir / f"audit-{stamp}.jsonl"
|
|
|
|
def now(self) -> datetime:
|
|
return self._now or datetime.now(timezone.utc)
|