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Structured JSON Logger with Automated PII Redaction.
"""
from __future__ import annotations
import json
import logging
import sys
from typing import Any
from backend.app.api.logging.pii_masker import mask_dict
class JsonPiiRedactingFormatter(logging.Formatter):
"""Custom formatter rendering structured JSON logs with PII suppression."""
def format(self, record: logging.LogRecord) -> str:
log_entry: dict[str, Any] = {
"timestamp": self.formatTime(record, self.datefmt),
"level": record.levelname,
"logger": record.name,
"message": record.getMessage(),
}
# Include custom extra fields if present
if hasattr(record, "extra_fields") and isinstance(record.extra_fields, dict):
log_entry["data"] = mask_dict(record.extra_fields)
return json.dumps(log_entry)
def get_logger(name: str) -> logging.Logger:
"""Configures and returns a PII-safe institutional logger."""
logger = logging.getLogger(name)
if not logger.handlers:
handler = logging.StreamHandler(sys.stdout)
handler.setFormatter(JsonPiiRedactingFormatter())
logger.addHandler(handler)
logger.setLevel(logging.INFO)
return logger
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