Conceito basico de proxy reverso fornecido pela http lbrary na linguagem Go

reverse-proxy-concept.go

 func serveReverseProxy(target string, res http.ResponseWriter, req *http.Request) {
	//parse the url
	url, err := url.Parse(target)
	if err != nil {
		panic(err.Error())
	}
	//create de reverse proxy
	proxy := httputil.NewSingleHostReverseProxy(url)

	//Update the headers to allow for SSL redirection
	req.URL.Host = url.Host
	req.URL.Scheme = url.Scheme
	req.Header.Set("X-Forwarded-Host", req.Header.Get("Host"))
	req.Host = url.Host

	// Note that ServeHttp is non blocking and uses a go routine under the hood
	proxy.ServeHTTP(res, req)
}