优化修改jsonrpc2模块代码

utils/jsonrpc2/rpc.go

@@ -74,6 +74,10 @@ func ParseRequest(input any) (*Request, error) {
 		return nil, errors.New(`"jsonrpc" must be "2.0"`)
 	}
 
+	if req.Method == "" {
+		return nil, errors.New("method must be non-empty")
+	}
+
 	return &req, nil
 }