feat: add sentry spans to evaluate proxy performances

internal/sentry/sentry.go

@@ -0,0 +1,37 @@
+package sentry
+
+import (
+	"net/http"
+
+	"github.com/getsentry/sentry-go"
+)
+
+func SpanHandler(handler http.Handler, name string) http.Handler {
+	fn := func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+
+		hub := sentry.GetHubFromContext(ctx)
+		if hub == nil {
+			hub = sentry.CurrentHub().Clone()
+			ctx = sentry.SetHubOnContext(ctx, hub)
+		}
+
+		options := []sentry.SpanOption{
+			sentry.WithOpName(name),
+			sentry.ContinueFromRequest(r),
+			sentry.WithTransactionSource(sentry.SourceURL),
+		}
+
+		span := sentry.StartSpan(ctx,
+			name,
+			options...,
+		)
+		defer span.Finish()
+
+		r = r.WithContext(span.Context())
+
+		handler.ServeHTTP(w, r)
+	}
+
+	return http.HandlerFunc(fn)
+}