About how to dynamically set nginx's parameters.

[wangkpot]

Hi, this module is really great! But now I have some problems with using this module.
Currently, this module only supports few parameters which that can be dynamically bound to routes, such as client_max_body_size. I want to support more parameters which that can be dynamically bound to routes.
At first, some parameters work before apisix's rewrite phase (we inject parameters by this phase), such as client_header_timeout, so how to set this parameter dynamically by apisix plugins?
Secondly, is there any way to quickly help us determine which stage an nginx parameter belongs to? So we can kown this parameter whether can be setted dynamically.
Thank you for taking the time to read my question, looking forward to a reply.