feat: expose raw frame query api

go/vehicle-gateway/cmd/realtime-api/main.go

@@ -15,8 +15,10 @@ import (
 	_ "github.com/go-sql-driver/mysql"
 	"github.com/redis/go-redis/v9"
 	"github.com/segmentio/kafka-go"
+	_ "github.com/taosdata/driver-go/v3/taosWS"
 
 	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/envelope"
+	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/history"
 	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/observability"
 	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/realtime"
 	"lingniu-vehicle-ingest/go/vehicle-gateway/internal/stats"
@@ -74,6 +76,32 @@ func main() {
 		logger.Warn("MYSQL_DSN is empty; stats query api disabled")
 	}
 	defer closeStats()
+	closeHistory := func() {}
+	if dsn := strings.TrimSpace(os.Getenv("TDENGINE_DSN")); dsn != "" {
+		driver := env("TDENGINE_DRIVER", "taosWS")
+		db, err := sql.Open(driver, dsn)
+		if err != nil {
+			logger.Error("history tdengine open failed", "driver", driver, "error", err)
+			os.Exit(1)
+		}
+		if err := db.PingContext(ctx); err != nil {
+			_ = db.Close()
+			logger.Error("history tdengine ping failed", "driver", driver, "error", err)
+			os.Exit(1)
+		}
+		closeHistory = func() { _ = db.Close() }
+		database := env("TDENGINE_DATABASE", history.DefaultDatabase)
+		mux.Handle("/api/history/raw-frames", history.NewRawFrameHandler(history.NewRawFrameRepository(db, database)))
+		logger.Info("history raw frame query enabled", "driver", driver, "database", database)
+	} else {
+		mux.HandleFunc("/api/history/raw-frames", func(w http.ResponseWriter, _ *http.Request) {
+			w.Header().Set("Content-Type", "application/json")
+			w.WriteHeader(http.StatusServiceUnavailable)
+			_ = json.NewEncoder(w).Encode(map[string]any{"error": "TDENGINE_DSN is not configured"})
+		})
+		logger.Warn("TDENGINE_DSN is empty; raw frame query api disabled")
+	}
+	defer closeHistory()
 
 	server := &http.Server{
 		Addr:              env("HTTP_ADDR", ":20210"),