How to set a value in mux.Vars(request)

Question

I want to set a value in mux.Vars() with MatcherFunc return true, then handlerFun can access to read. But panic assignment to entry in nil map when mux.Vars(request)["key"] = "value"

How can I set a value:

domainRouter := router.MatcherFunc(func(request *http.Request, match *mux.RouteMatch) bool {
    if isOk {
        mux.Vars(request)["key"] = "value"
        return true
    }
    return false
}).Subrouter()

if Vars is nil you must initialize it first. – Volker May 16 '19 at 11:08 — Volker, May 16 '19 at 11:08

score 0 · Answer 1 · answered May 16 '19 at 12:01

0

This part of code is correct, the issue is in the place where you create mux.NewRouter(), it seems like your domainRouter is called before mux.NewRouter().

answered May 16 '19 at 12:01

Alex Pliutau

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How to set a value in mux.Vars(request)

1 Answers1