text: const {createGzip, createDeflate} = require('zlib');
  
  module.exports = (rs, req, res) => {
    console.log(2)
    const acceptEncoding = req.headers['accept-encoding'];
    if (!acceptEncoding || !acceptEncoding.match(/\b(gzip|deflate)\b/)) {
      return rs;
    } 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());
    }
  }
  