text: const { createGzip, createDeflate } = require('zlib')
  
  module.exports = (rs, req, res) => {
      const acceptEncoding = req.headers['accept-encoding'];
      if (!acceptEncoding || !acceptEncoding.match(/\b(gzip|deflate)\b/)) {
          return res
      } else if (acceptEncoding.match(/\bgzip\b/)) {
          res.setHeader('Content-Encoding', 'gzip');
          return rs.pipe(createGzip())
      } else if (acceptEncoding.match(/\bdeflate\b/)) {
          res.setHeader('Content-Encoding', 'deflate')
          return rs.pipe(createDeflate())
      }
  }