update

common/components/uploader/Uploader.php

@@ -37,15 +37,18 @@ class Uploader extends Component
 
     /**
      * 上传文件
-     * @param $uploaded_file UploadedFile
-     * @param $savename string 文件保存名
-     * @return bool|string 文件rui or false
+     * @param  $uploaded_file UploadedFile
+     * @param  $savename      string         文件保存名
      * @throws Exception
+     * @return bool|string    文件rui or false
      */
     public function upload($uploaded_file, $savename = '')
     {
         if (empty($savename)) {
-            $savename = md5(date('Y-m-d H:i:s') . $uploaded_file->tempName) . '.' . $uploaded_file->extension;
+            $savename = md5(date('Y-m-d H:i:s') . $uploaded_file->tempName);
+            if ($uploaded_file->extension) {
+                $savename = $savename . '.' . $uploaded_file->extension;
+            }
         }
         $this->absolute = rtrim(str_replace('\\', '/', $this->absolute), '/') . '/';
 
@@ -68,4 +71,4 @@ class Uploader extends Component
         }
     }
 
-}
\ No newline at end of file
+}