gzip-with-buffer.js

const fs = require('fs');
const zlib = require('zlib');

const filename = process.argv[2];

fs.readFile(filename, (err, content) => {
  zlib.gzip(content, (err, gzipedContent) => {
    fs.writeFile(`${filename}.gz`, gzipedContent, err => {
      console.log('file compresed');
    })
  })
})