Tweak

api/server/auth/auth.go

@@ -141,11 +141,13 @@ func (h authHandler) NamespaceFromRequest(req *http.Request) string {
 
 	// determine the host, e.g. dev.micro.mu:8080
 	host := req.URL.Hostname()
+	if len(host) == 0 {
 		if h, _, err := net.SplitHostPort(req.Host); err == nil {
 			host = h // host does contain a port
 		} else if strings.Contains(err.Error(), "missing port in address") {
 			host = req.Host // host does not contain a port
 		}
+	}
 
 	// check for an ip address
 	if net.ParseIP(host) != nil {