Inflates file content and encodes as base64

pack_file.js

/**
 * To use this module simply run:
 * ~~~{.sh}
 * node pack_file.js
 * ~~~
 */

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

const kJsonFile = 'file.json';
const kDeflatedFile = 'file_packed.txt';
const kInflatedFile = 'file_unpacked.json';

var data = fs.readFileSync(kJsonFile, 'utf8');

var deflated = zlib.deflateSync(data).toString('base64');
fs.writeFileSync(kDeflatedFile, deflated);

// Test written data
deflated = fs.readFileSync(kDeflatedFile, 'utf8');
var inflated = zlib.inflateSync(Buffer.from(deflated, 'base64')).toString();
fs.writeFileSync(kInflatedFile, inflated);

if (inflated != data)
  console.warn('test failed');