Golang-将userID存储在http结构中

Question

I need to store the userID somewhere in the w http.ResponseWriter or the req *http.Request, so that in my handlers I can access them.
how can I do this?
this is a small demo for what I need:

func test(w http.ResponseWriter, r *http.Request){
    userID := w.UserID // or something like this
}

again this value MUST be stored in either of these variables so that I can access it in all my http handlers.
Thanks a lot for your time

Answer 1

You could embed http.ResponseWriter into your own struct and add extra fields

type ResponseWriter struct{
    http.ResponseWriter
    UserID int
}

Now use your ResponseWriter instead of http.ResponseWriter.

I hope this helps. Embeded Types