From 1a9c6bece4e9da6cc09c9ded62dc3dc1e941f9d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=9D=E4=BB=A3=E5=B0=BE?= <svefnz@gmail.com>
Date: Thu, 19 Mar 2026 15:39:51 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=20hy2.sh?=
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---
 hy2.sh | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/hy2.sh b/hy2.sh
index d62d247..1bb2bb8 100644
--- a/hy2.sh
+++ b/hy2.sh
@@ -24,6 +24,10 @@ require_cmd() {
   }
 }
 
+random_subdomain_prefix() {
+  openssl rand -hex 8 | cut -c1-8
+}
+
 prompt_nonempty() {
   local prompt="$1"
   local value=""
@@ -444,7 +448,12 @@ main() {
 
   email="$(prompt_nonempty '请输入 ACME 邮箱: ')"
   zone="$(prompt_nonempty '请输入 Cloudflare Zone（例如 example.com）: ')"
-  subdomain="$(prompt_nonempty '请输入要创建的子域名前缀（例如 hy2）: ')"
+  
+  default_subdomain="$(random_subdomain_prefix)"
+  read -r -p "请输入要创建的子域名前缀（例如 hy2，直接回车使用默认值 ${default_subdomain}）: " subdomain
+  subdomain="${subdomain:-$default_subdomain}"
+  subdomain="$(printf '%s' "$subdomain" | tr 'A-Z' 'a-z' | tr -cd 'a-z0-9-')"
+
   CF_API_TOKEN="$(prompt_nonempty '请输入 Cloudflare API Token: ')"
   export CF_API_TOKEN