Semconv OTLP stable HTTP metrics

pkg/middlewares/observability/observability.go

@@ -0,0 +1,31 @@
+package observability
+
+import (
+	"context"
+	"fmt"
+
+	"go.opentelemetry.io/otel/codes"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// SetStatusErrorf flags the span as in error and log an event.
+func SetStatusErrorf(ctx context.Context, format string, args ...interface{}) {
+	if span := trace.SpanFromContext(ctx); span != nil {
+		span.SetStatus(codes.Error, fmt.Sprintf(format, args...))
+	}
+}
+
+func Proto(proto string) string {
+	switch proto {
+	case "HTTP/1.0":
+		return "1.0"
+	case "HTTP/1.1":
+		return "1.1"
+	case "HTTP/2":
+		return "2"
+	case "HTTP/3":
+		return "3"
+	default:
+		return proto
+	}
+}