diff --git a/application/controllers/cache.php b/application/controllers/cache.php
index beed0749..447202f8 100644
--- a/application/controllers/cache.php
+++ b/application/controllers/cache.php
@@ -142,43 +142,25 @@ class Cache extends CI_Controller {
    *
    */
   private function tree($dir, &$file, &$path, &$file_time) {
-    // 处理目录名中的特殊字符
-    $dir   = mb_convert_encoding($dir, 'UTF-8', mb_detect_encoding($dir, ['ASCII', 'GBK', 'ISO-8859-1', 'UTF-8']));
-    $mydir = @dir($dir);
-    if (! $mydir) {
-      return;
-    }
+    $mydir = dir($dir);
     while ($f = $mydir->read()) {
-      // 跳过.和..
-      if ($f == '.' || $f == '..') {
-        continue;
-      }
-      // 处理文件名中的特殊字符
-      $f        = mb_convert_encoding($f, 'UTF-8', mb_detect_encoding($f, ['ASCII', 'GBK', 'ISO-8859-1', 'UTF-8']));
-      $fullPath = $dir . '/' . $f;
-      if (is_dir($fullPath) && (strpos($dir, '/cn/') === false) && (strpos($dir, '/amp/') === false) && (strpos($dir, '/js/') === false) && (strpos($dir, 'stfolder') === false)) {
-        $path[] = $fullPath;
-        $this->tree($fullPath, $file, $path, $file_time);
+      if (is_dir("$dir/$f") && $f != "." && $f != ".." && (strpos($dir, '/cn/') === false) && (strpos($dir, '/amp/') === false) && (strpos($dir, '/js/') === false) && (strpos($dir, 'stfolder') === false)) {
+        $path[] = "$dir/$f";
+        $this->tree("$dir/$f", $file, $path, $file_time);
       } else {
-        if (
-          (strpos($f, 'stfolder') === false) &&
-          (strpos($f, '/cn/') === false) &&
-          (strpos($f, '/amp/') === false) &&
-          (strpos($f, '.pdf') === false) &&
-          (strpos($f, '.mobile.htm') === false) &&
-          (strpos($f, '.txt') === false) &&
-          (strpos($f, '/js/') === false) &&
-          (strpos($f, '.amp') === false) &&
-          (strpos($f, 'stignore') === false)
-        ) {
+        if ($f != '.' && $f != '..' && (strpos($f, 'stfolder') === false) && (strpos($f, '/cn/') === false) && (strpos($f, '/amp/') === false) && (strpos($f, '.pdf') === false) && (strpos($f, '.mobile.htm') === false) && (strpos($f, '.txt') === false) && (strpos($f, '/js/') === false) && (strpos($f, '.amp') === false) && (strpos($f, 'stignore') === false)) {
           $file_temp            = str_replace('/index.htm###', '', $f . '###');
           $file_temp            = str_replace('###', '', $file_temp);
           $path_temp            = str_replace($this->dir, '', $dir);
           $url_temp             = $this->current_domain . $path_temp . '/' . $file_temp;
           $url_temp             = str_replace('/index.htm', '/', $url_temp);
-          $file_time[$url_temp] = date("F d Y H:i:s", filemtime($fullPath));
-          $_url_temp            = $url_temp;
-          $file[]               = $_url_temp;
+          $file_time[$url_temp] = date("F d Y H:i:s", filemtime("$dir/$f"));
+
+          // $encode    = mb_detect_encoding($url_temp, ['ASCII', 'GBK', 'ISO-8859-1', 'UTF-8']);
+          // $_url_temp = mb_convert_encoding($url_temp, 'UTF8', $encode);
+          $_url_temp = $url_temp;
+
+          $file[] = $_url_temp;
         }
       }
     }