h2c.js

'use strict';

const http = require('http');
const http2 = require('http2');

const req = http.get('http://nghttp2.org/httpbin/get', {
  headers: {
    'Connection': 'Upgrade, HTTP2-Settings',
    'Upgrade': 'h2c',
    'HTTP2-Settings': http2.getPackedSettings().toString('base64'),
  },
});

req.once('upgrade', (r, socket, h) => {
  const session = http2.connect('http://nghttp2.org', {
    createConnection: () => socket,
  });
  const req = session.request({
    ':path': '/httpbin/get',
    ':method': 'GET',
  });
  req.once('response', console.log);
});