31 lines
897 B
Python
31 lines
897 B
Python
"""
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Per-request logging context.
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Carries the request id (the same one `RequestIDMiddleware` puts on the
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`X-Request-ID` header) into every log record via a ContextVar + logging.Filter,
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so a whole request's log lines can be grepped by one id — essential when
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watching the live API.
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"""
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import contextvars
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import logging
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# Default "-" so non-request logs (startup, background agents) still format cleanly.
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_request_id: contextvars.ContextVar[str] = contextvars.ContextVar("request_id", default="-")
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def set_request_id(request_id: str) -> None:
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_request_id.set(request_id or "-")
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def get_request_id() -> str:
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return _request_id.get()
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class RequestIdFilter(logging.Filter):
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"""Injects `request_id` onto every LogRecord so the format string can use it."""
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def filter(self, record: logging.LogRecord) -> bool:
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record.request_id = _request_id.get()
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return True
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