example of gzipping files manually in Node

manual.js

var http = require('http');
var fs = require('fs');
var zlib = require('zlib');

http.createServer(function (req, res) {
  // var img = fs.readFileSync('./bird.jpg');
  var img = fs.createReadStream('./public/bird.jpg');

  // res.writeHead(200, {'Content-Type': 'image/jpeg'});
  res.writeHead(200, { 'content-encoding': 'gzip' });

  // res.end(img, 'binary');
  img.pipe(zlib.createGzip({level: 9})).pipe(res);

}).listen(8080, '127.0.0.1');