INNER CODE UNIT · Python

_request_label_values

stephenhillier/starlette_exporter · starlette_exporter/middleware.py:317

    async def _request_label_values(self, request: Request) -> List[str]:
        values: List[str] = []

        for k, v in self.request_labels.items():
            if callable(v):
                parsed_value = ""
                # if provided a callable, try to use it on the request.
                try:
                    result = v(request)
                    if iscoroutine(result):
                        result = await result
                except Exception:
                    logger.warn(f"label function for {k} failed", exc_info=True)
                else:
                    parsed_value = str(result)
                values.append(parsed_value)
                continue

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