How to rewrite based on custom header in nginx

Question

I am working on an API interface recently and want to write the API version to the header. So how do I get this variable from nginx and rewrite it according to it? Mainly, I don't know how to get this custom variable. Please, fellow Taoists

Answer 1

It is recommended to write the version number into the url, either path or parameter. nginx can easily get this value in the configuration file and process it.
If it is a header, you need to compile and configure another module.