[go-nuts] What is the best way to redirect naked domains to a subdomain?

[Andrew O'Neill]

I would like to do this in go and was wondering if my approach is good
enough or if there is a better way. Below is the example code and a
playground link https://play.golang.org/p/wLzmOFMrudP

Andrew

const (
    domain    = "example.com"
    wwwdomain = "www." + domain
)
mux := http.NewServeMux()
mux.HandleFunc(domain+"/", func(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Connection", "close")
    url := "http://"; + wwwdomain + r.URL.String()
    http.Redirect(w, r, url, http.StatusMovedPermanently)
})
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("hello, world"))
})

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