pub async fn handle_prometheus(
registry: &MetricsRegistry,
headers: HeaderMap,
) -> Result<Response, (StatusCode, String)>Expand description
Serves metrics from the selected metrics registry variant.
If the caller’s Accept header advertises support for the Prometheus
protobuf format (application/vnd.google.protobuf), the response is a
length-delimited stream of io.prometheus.client.MetricFamily messages.
Otherwise the standard Prometheus text format is returned.