text: const { createDeflate, createGzip } = require('zlib');
  
  module.exports = (rs, req, res) => {
    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());
    }
  };