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-Range', 'bytes')
  	res.setHeader('Content-Range', `butes ${start} - ${end}/${totalSize}`)
  	res.setHeader('Content-Length', end -start)
  	return {
  		code: 206,
  		start: parseInt(start),
  		end: parseInt(end)
  	}
  }