INNER CODE UNIT · Python

handle_openmetrics

stephenhillier/starlette_exporter · starlette_exporter/__init__.py:48

def handle_openmetrics(request: Request) -> Response:
    """A handler to expose Prometheus metrics in OpenMetrics format.
    This is required to expose metrics with exemplars.
    Example usage:

        ```
        app.add_middleware(PrometheusMiddleware)
        app.add_route("/metrics", openmetrics_handler)
        ```
    """
    registry = REGISTRY
    if (
        "prometheus_multiproc_dir" in os.environ
        or "PROMETHEUS_MULTIPROC_DIR" in os.environ
    ):
        registry = CollectorRegistry()
        multiprocess.MultiProcessCollector(registry)

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