php - ZendFramework - 如何保护上传到公共/目录的机密文件？

Question

一些用户在那里上传存储在目录中的机密合同/协议文件/var/www/html/project/public/contract/<HERE_UNIQUE_FILES.pdf>。

但问题来自谷歌搜索或直接链接，任何未经授权的用户都可以打开它并查看/复制它。

我该如何保护它，以便只有我的域或允许的对等方只能访问此私有目录？

例子：

class Application_Model_Uploader
{

  public static function mvUploadContract()
  {     
        /* Anyone from outside can access this path, but how to protect it? */
        $target_path = APPLICATION_PATH . "/../public/contract/";          
        $target_path = $target_path .  basename( $_FILES['contractfile']['name']);
        if(move_uploaded_file($_FILES['contractfile']['tmp_name'], $target_path)) 
        {
            $result = true;
        }else{
            $result = false;
        }
  }
}

Answer 1

将文件移出公共目录并在授权用户后使用 PHP 流式传输它们。

if (is_authorized($user)) {
  header('Content-Description: File Transfer');
  header('Content-Type: application/octet-stream');
  header('Content-Disposition: attachment; filename='.basename($path_to_file_outside_public));
  header('Content-Transfer-Encoding: binary');
  header('Expires: 0');
  header('Cache-Control: must-revalidate');
  header('Pragma: public');
  header('Content-Length: ' . filesize($path_to_file_outside_public));

  readfile($path_to_file_outside_public);
}