Host Swagger API Doc

main.go

	http.HandleFunc("/", SpecUIPage)
	http.HandleFunc("/swagger.json", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")
		// put swagger.json under current folder
		http.ServeFile(w, r, "swagger.json")
	})


func SpecUIPage(w http.ResponseWriter, r *http.Request) {
	swaggerAddr := "http://" + r.Host + "/swagger.json"
	http.Redirect(w, r, "http://petstore.swagger.io/?url="+url.QueryEscape(swaggerAddr), http.StatusSeeOther)
}