package main import ( "context" "fmt" "net/http" "os" "time" "github.com/smallstep/certificates/ca" ) func main() { if len(os.Args) != 2 { fmt.Fprintf(os.Stderr, "Usage: %s <token>\n", os.Args[0]) os.Exit(1) } token := os.Args[1] // make sure to cancel the renew goroutine ctx, cancel := context.WithCancel(context.Background()) defer cancel() srv, err := ca.BootstrapServer(ctx, token, &http.Server{ Addr: ":8443", Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { name := "nobody" if r.TLS != nil && len(r.TLS.PeerCertificates) > 0 { name = r.TLS.PeerCertificates[0].Subject.CommonName } w.Write([]byte(fmt.Sprintf("Hello %s at %s!!!", name, time.Now().UTC()))) }), }) if err != nil { panic(err) } fmt.Println("Listening on :8443 ...") if err := srv.ListenAndServeTLS("", ""); err != nil { panic(err) } }