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31e8a9f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | """Structured API logging with request correlation and bounded, safe access fields."""
from __future__ import annotations
import json
import logging
from contextvars import ContextVar
from datetime import UTC, datetime
from logging.config import dictConfig
request_id_context: ContextVar[str] = ContextVar("request_id", default="-")
class JsonFormatter(logging.Formatter):
"""Serialize log records without exception bodies, query strings, or request payloads."""
def format(self, record: logging.LogRecord) -> str:
payload = {
"timestamp": datetime.fromtimestamp(record.created, UTC).isoformat(),
"level": record.levelname,
"logger": record.name,
"message": record.getMessage(),
"request_id": request_id_context.get(),
}
for field in ("method", "route", "status_code", "duration_ms", "exception_type"):
if hasattr(record, field):
payload[field] = getattr(record, field)
if record.exc_info and record.exc_info[0]:
payload["exception_type"] = record.exc_info[0].__name__
return json.dumps(payload, ensure_ascii=True, default=str)
def configure_json_logging() -> None:
"""Configure the API's console logs; access logging is owned by the middleware."""
dictConfig(
{
"version": 1,
"disable_existing_loggers": False,
"formatters": {"json": {"()": JsonFormatter}},
"handlers": {
"console": {"class": "logging.StreamHandler", "formatter": "json"},
"null": {"class": "logging.NullHandler"},
},
"root": {"level": "INFO", "handlers": ["console"]},
"loggers": {
"uvicorn": {"handlers": ["console"], "propagate": False},
"uvicorn.access": {"handlers": ["null"], "propagate": False},
},
}
)
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