regex the username

1 files changed, 9 insertions, 1 deletions

diff --git a/src/http.go b/src/http.go
index 13276f7..c5e982d 100644
--- a/src/http.go
+++ b/src/http.go
@@ -9,6 +9,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"regexp"
 	"strings"
 
 	"github.com/gorilla/mux"
@@ -114,7 +115,14 @@ func isUniq(username string) bool {
 }
 
 func isValid(username string) bool {
-	if username == "traefik" || username == "register" {
+	// reserved subdomains
+	if username == "traefik" || username == "register" || username == "scoreboard" || username == "grafana" {
+		return false
+	}
+
+	// valid Format
+	var validFormat = regexp.MustCompile("^[a-zA-Z0-9]{1,60}$")
+	if validFormat.MatchString(username) == false {
 		return false
 	}
 	return true