go server for CORS

main.go

/* srever of data accessible by CORS */
/* start with: go run main.go */

package main

import (
    "net/http"
    "log"
)


func enableCors(w *http.ResponseWriter) {
	(*w).Header().Set("Access-Control-Allow-Origin", "*")
}

var fileServer = http.FileServer(http.Dir("/path-to-your-files")) // instance of file server handler


type myHandler struct{}

func (myHandler) ServeHTTP(w http.ResponseWriter, req *http.Request){
	enableCors(&w)
	fileServer.ServeHTTP(w, req)
}

func main() {
	err := 	http.ListenAndServe(":8001", new(myHandler) )
	if err != nil {
		log.Fatal("ListenAndServe: ", err)
    }
}