Draft: big refactor

server/middlewares/bunrouterOtel.go

@@ -0,0 +1,50 @@
+package middlewares
+
+import (
+	"net/http"
+
+	"gitea.konchin.com/ytshih/inp2025/game/utils"
+	"github.com/uptrace/bunrouter"
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+	"go.opentelemetry.io/otel/trace"
+)
+
+func (self *Handlers) BunrouterOtel(
+	next bunrouter.HandlerFunc,
+) bunrouter.HandlerFunc {
+	return func(w http.ResponseWriter, req bunrouter.Request) error {
+		span := trace.SpanFromContext(req.Context())
+		if !span.IsRecording() {
+			return next(w, req)
+		}
+
+		params := req.Params()
+		span.SetName(req.Method + " " + params.Route())
+
+		paramSlice := params.Slice()
+		attrs := make([]attribute.KeyValue, 0, 3+len(paramSlice))
+
+		attrs = append(attrs, semconv.HTTPRouteKey.String(req.Route()))
+
+		if req.URL != nil {
+			attrs = append(attrs, semconv.HTTPTargetKey.String(req.URL.RequestURI()))
+		} else {
+			// This should never occur if the request was generated by the net/http
+			// package. Fail gracefully, if it does though.
+			attrs = append(attrs, semconv.HTTPTargetKey.String(req.RequestURI))
+		}
+
+		attrs = append(attrs, semconv.HTTPClientIPKey.String(
+			utils.GetRemoteAddr(req)))
+
+		for _, param := range paramSlice {
+			attrs = append(attrs, attribute.String("http.route.param."+param.Key,
+				param.Value))
+		}
+
+		span.SetAttributes(attrs...)
+
+		return next(w, req)
+	}
+}