Small changes

utils/utils.go

@@ -23,3 +23,16 @@ func IsValidUrl(s string) bool {
 	return true
 
 }
+
+func IsValidShortUrl(s string) bool {
+	if len(s) < 3 || len(s) > 10 {
+		return false
+	}
+	shortUrlRegex := `^[a-zA-Z0-9]+$`
+	matched, err := regexp.MatchString(shortUrlRegex, s)
+	if err != nil || !matched {
+		return false
+	}
+
+	return true
+}