Proxy http server to transform any img to webp

index.js

const http = require('http');
const imgmin = require('imagemin-webp');
const r = require('request');

const imgPath = 'http://cdn.pixabay.com/photo/2017/05/13/23/05/img-src-x-2310895_960_720.png';

const server = http.createServer((req, res) => {
    const request = r.defaults({ encoding: null });
    request.get(imgPath, async (err, iRes, body) => {

        try {
            const img = await imgmin({ quality: 50})(body);

            res.writeHead(200, {
                'Content-Type': 'image/webp',
                'Content-Length': img.byteLength,
            });
            res.write(img, 'binary');
        } catch(e) {
            console.error(e);
            res.writeHead(500);
        }

        res.end();
    });
});

server.listen(8080);

package.json

{
  "name": "proxy_img",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "imagemin-webp": "^5.1.0",
    "request": "^2.88.0"
  }
}