troi mua qua

src/middlewares/graphql.middleware.ts

@@ -22,6 +22,17 @@ export class GraphQLValidationMiddleware implements NestMiddleware {
           ],
         });
       }
+      // handle query only contain \n
+      if (query.trim() === '') {
+        return res.status(400).json({
+          errors: [
+            {
+              message:
+                'Must provide a valid GraphQL query, mutation, or subscription.',
+            },
+          ],
+        });
+      }
     }
 
     // Continue to the next middleware or GraphQL handler