changes added for live tail api

pkg/query-service/app/clickhouseReader/reader.go

@@ -2884,7 +2884,7 @@ func (r *ClickHouseReader) GetLogs(ctx context.Context, params *model.LogsFilter
 }
 
 func (r *ClickHouseReader) TailLogs(ctx context.Context, client *model.LogsTailClient) {
-	response := &[]model.GetLogsResponse{}
+
 	fields, apiErr := r.GetLogFields(ctx)
 	if apiErr != nil {
 		client.Error <- apiErr.Err
@@ -2934,8 +2934,9 @@ func (r *ClickHouseReader) TailLogs(ctx context.Context, client *model.LogsTailC
 			if idStart != nil {
 				tmpQuery += fmt.Sprintf(" and id > '%s'", *idStart)
 			}
-			tmpQuery = fmt.Sprintf("%s order by timestamp asc limit 1000", tmpQuery)
+			tmpQuery = fmt.Sprintf("%s order by timestamp asc, id asc limit 1000", tmpQuery)
 			zap.S().Debug(tmpQuery)
+			response := &[]model.GetLogsResponse{}
 			err := r.db.Select(ctx, response, tmpQuery)
 			if err != nil {
 				zap.S().Debug(err)

pkg/query-service/app/http_handler.go

@@ -1951,13 +1951,12 @@ func (aH *APIHandler) tailLogs(w http.ResponseWriter, r *http.Request) {
 			enc := json.NewEncoder(&buf)
 			enc.Encode(ev)
 			fmt.Fprintf(w, "data: %v\n\n", buf.String())
-			fmt.Printf("data: %v\n", buf.String())
 			flusher.Flush()
 		case <-client.Done:
-			fmt.Println("done!")
+			zap.S().Debug("done!")
 			return
 		case <-client.Error:
-			fmt.Println("error occured!")
+			zap.S().Debug("error occured!")
 			return
 		}
 	}

pkg/query-service/app/server.go

@@ -166,8 +166,8 @@ func (s *Server) createPublicServer(api *APIHandler) (*http.Server, error) {
 
 	c := cors.New(cors.Options{
 		AllowedOrigins: []string{"*"},
-		AllowedMethods: []string{"GET", "DELETE", "POST", "PUT"},
-		AllowedHeaders: []string{"Accept", "Authorization", "Content-Type"},
+		AllowedMethods: []string{"GET", "DELETE", "POST", "PUT", "OPTIONS"},
+		AllowedHeaders: []string{"Accept", "Authorization", "Content-Type", "cache-control"},
 	})
 
 	handler := c.Handler(r)