[Question] Custom template, unable to dynamically pass parameters

### Question

自定义模版，无法动态的传递参数，例如http请求，上送的payload，无法动态的获取当前时间和一些函数，建议在参数模块和metrics模块新增calculates，进行Google Aviator语法操作

The issue concerns custom templates, HTTP payload parameters, and metrics, but names no files or tests. Start by locating the parameter and metrics modules, then clarify the requested calculation behavior and completion criteria for dynamic current-time and function values.

Written by the indexing model from the issue text.