diff --git a/README.md b/README.md
index 9055c587..187d1767 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 </p>
 <p align="center">
   <a href="https://github.com/Xhofe/alist/releases"><img src="https://img.shields.io/github/release/Xhofe/alist" alt="Release version"></a>
-  <a href="https://github.com/Xhofe/alist/actions?query=workflow%3ABuild"><img src="https://github.com/Xhofe/alist/workflows/Build/badge.svg" alt="Build status"></a>
+  <a href="https://github.com/Xhofe/alist/actions?query=workflow%3ABuild"><img src="https://github.com/Xhofe/alist/workflows/build/badge.svg" alt="Build status"></a>
   <a href="https://github.com/Xhofe/alist/releases"><img src="https://img.shields.io/github/downloads/Xhofe/alist/latest/total" alt="Downloads"></a>
   <a href="https://github.com/Xhofe/alist/blob/main/LICENSE"><img src="https://img.shields.io/github/license/Xhofe/alist" alt="License"></a>
   <a href="https://pay.xhofe.top">
diff --git a/bootstrap/update.go b/bootstrap/update.go
index c688f0c2..33ee07b7 100644
--- a/bootstrap/update.go
+++ b/bootstrap/update.go
@@ -16,6 +16,7 @@ type GithubRelease struct {
 }
 
 func CheckUpdate() {
+	log.Infof("检查更新...")
 	url:="https://api.github.com/repos/Xhofe/alist/releases/latest"
 	resp,err:=http.Get(url)
 	if err!=nil {
diff --git a/conf.yml.example b/conf.yml.example
index 339dfc4c..424a82a9 100644
--- a/conf.yml.example
+++ b/conf.yml.example
@@ -1,17 +1,23 @@
 info:
   title: AList #标题
-  site_url: http://localhost:5277 #前端地址
-  backend_url: http://localhost:5244 #后端地址
   logo: "" #网站logo 如果填写,则会替换掉默认的
   footer_text: Xhofe's Blog #网页底部文字
   footer_url: https://www.nn.ci #网页底部文字链接
   music_img: https://img.oez.cc/2020/12/19/0f8b57866bdb5.gif #预览音乐文件时的图片
   check_update: true #前端是否显示更新
   script: #自定义脚本,可以是脚本的链接，也可以直接是脚本内容,如document.querySelector('body').style="background-image:url('https://api.mtyqx.cn/api/random.php');background-attachment:fixed"
+  autoplay: true #视频是否自动播放
+    preview:
+      url: https://view.alist.nn.ci/onlinePreview?url= #extensions中包含的后缀名预览的地址，默认使用了kkFileView，可以自行搭建
+      pre_process: [base64,encodeURIComponent] #对地址的处理，支持base64,encodeURIComponent,encodeURI
+      extensions: [doc,docx,ppt,pptx,xls,xlsx,pdf] #使用上面的url预览的文件后缀
+      text: [txt,htm,html,xml,java,properties,sql,js,md,json,conf,ini,vue,php,py,bat,gitignore,yml,go,sh,c,cpp,h,hpp] #要预览的文本文件的后缀，可以自行添加
+      max_size: 5242880
 server:
   port: "5244" #程序监听端口
   search: true #是否开启搜索接口,开启搜索之后密码和根目录都会失效,所以前端暂时不做搜索
   static: dist #前端文件目录
+  site_url: '*' #建议直接填*,若有信任域名要求,可填写其他,逗号分割
 cache:
   enable: true #是否开启缓存
   expiration: 60 #缓存失效时间(单位:分钟)
diff --git a/server/middlewares.go b/server/middlewares.go
index e408a6b6..c3399594 100644
--- a/server/middlewares.go
+++ b/server/middlewares.go
@@ -9,9 +9,15 @@ import (
 
 func CrosHandler() gin.HandlerFunc {
 	return func(context *gin.Context) {
+		origin:=context.GetHeader("Origin")
+		// 同源
+		if origin == "" {
+			context.Next()
+			return
+		}
 		method := context.Request.Method
 		// 设置跨域
-		context.Header("Access-Control-Allow-Origin",context.GetHeader("Origin"))
+		context.Header("Access-Control-Allow-Origin",origin)
 		context.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE,UPDATE")
 		context.Header("Access-Control-Allow-Headers", "Content-Length,session,Accept, Origin, Host, Connection, Accept-Encoding, Accept-Language, Keep-Alive, User-Agent, Cache-Control, Content-Type")
 		context.Header("Access-Control-Expose-Headers", "Content-Length,Cache-Control,Content-Language,Content-Type,Expires,Last-Modified")