Initial QSfera import

Server/services/proxy/pkg/middleware/tracing.go

@@ -0,0 +1,35 @@
+package middleware
+
+import (
+	"net/http"
+
+	chimiddleware "github.com/go-chi/chi/v5/middleware"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
+)
+
+// Tracer provides a middleware to start traces
+func Tracer(tp trace.TracerProvider) func(next http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return &tracer{
+			next:          next,
+			traceProvider: tp,
+		}
+	}
+}
+
+type tracer struct {
+	next          http.Handler
+	traceProvider trace.TracerProvider
+}
+
+func (m tracer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	span := trace.SpanFromContext(r.Context())
+	span.SetAttributes(
+		attribute.KeyValue{
+			Key:   "x-request-id",
+			Value: attribute.StringValue(chimiddleware.GetReqID(r.Context())),
+		})
+
+	m.next.ServeHTTP(w, r)
+}