text: module.exports = (totalSize, req, res) => {
      const range = req.headers['range'];
      if (!range) {
          return {code: 200};
      }
      const sizes = range.match(/bytes=(\d*)-(\d*)/);
      const end = sizes[2] || totalSize - 1;
      const start = sizes[1] || totalSize - end;
  
      if (start > end ||start < 0 ||end > totalSize) {
          return {code: 200};
      }
      res.setHeader('Accept-Ranges', 'bytes');
      res.setHeader('Content-Range', `bytes ${start}-${end}/${totalSize}`);
      res.setHeader('Content-Length', end - start)
      return {
          code: 206,
          start: parseInt(start),
          end: parseInt(end)
      }
  };