Подготовить HY2XS к production-сборке

apps/util/rand.go

@@ -0,0 +1,19 @@
+package util
+
+import "crypto/rand"
+
+const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+
+func RandomString(length int) (string, error) {
+	bytes := make([]byte, length)
+	_, err := rand.Read(bytes)
+	if err != nil {
+		return "", err
+	}
+
+	for i := range bytes {
+		bytes[i] = charset[int(bytes[i])%len(charset)]
+	}
+
+	return string(bytes), nil
+}