support runtime.ServeMux opts for grpc-gateway

pkg/ambient/ambient.go

@@ -318,6 +318,18 @@ func (aw *AmbientWeather) enrichStation(update *weather.WeatherUpdate) {
 	}
 }
 
+func (aw *AmbientWeather) GetLogger() *zerolog.Logger {
+	aw.RLock()
+	defer aw.RUnlock()
+	return aw.l
+}
+
+func (aw *AmbientWeather) GetCtx() context.Context {
+	aw.RLock()
+	defer aw.RUnlock()
+	return aw.appCtx
+}
+
 func (aw *AmbientWeather) GetRecorder() *recorder.WeatherRecorder {
 	aw.RLock()
 	defer aw.RUnlock()

pkg/ambient/app.go

@@ -0,0 +1,33 @@
+package ambient
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
+)
+
+func (aw *AmbientWeather) GetGatewayOpts() []runtime.ServeMuxOption {
+	return []runtime.ServeMuxOption{
+		runtime.WithMiddlewares(func(hf runtime.HandlerFunc) runtime.HandlerFunc {
+			return func(w http.ResponseWriter, r *http.Request, pathParams map[string]string) {
+				aw.GetLogger().Trace().
+					Any("pathParams", pathParams).
+					Msg("inbound request called")
+			}
+		}),
+		runtime.WithRoutingErrorHandler(
+			func(
+				ctx context.Context, mux *runtime.ServeMux, mshl runtime.Marshaler,
+				w http.ResponseWriter, r *http.Request, code int,
+			) {
+				aw.GetLogger().Trace().
+					Int("code", code).
+					Str("pattern", r.Pattern).
+					Msg("requesting grpc-gateway route")
+
+				// Pass back to default
+				runtime.DefaultRoutingErrorHandler(ctx, mux, mshl, w, r, code)
+			}),
+	}
+}