server.ts

import 'zone.js/node';

import { ngExpressEngine } from '@nguniversal/express-engine';
import * as express from 'express';
import { join } from 'path';

import { APP_BASE_HREF } from '@angular/common';
import { existsSync } from 'fs';
import bootstrap from './src/main.server';

// The Express app is exported so that it can be used by serverless Functions.
export function app(): express.Express {
 const server = express();
 const distFolder = join(process.cwd(), 'dist/localize/browser');
 const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

 // Our Universal express-engine (found @ https://github.com/angular/universal/tree/master/modules/express-engine)
 server.engine('html', ngExpressEngine({
 bootstrap,
 }));

 server.set('view engine', 'html');
 server.set('views', distFolder);

 // Example Express Rest API endpoints
 // server.get('/api/**', (req, res) => { });
 // Serve static files from /browser
 server.get('*.*', express.static(distFolder, {
 maxAge: '1y'
 }));

 // All regular routes use the Universal engine
 server.get('*', (req, res) => {
 res.render(indexHtml, { req, providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }] });
 });

 return server;
}

function run(): void {
 const port = process.env.PORT || 4000;

 // Start up the Node server
 const server = app();
 server.listen(port, () => {
 console.log(`Node Express server listening on http://localhost:${port}`);
 });
}

// Webpack will replace 'require' with '__webpack_require__'
// '__non_webpack_require__' is a proxy to Node 'require'
// The below code is to ensure that the server is run only when not requiring the bundle.
declare const __non_webpack_require__: NodeRequire;
const mainModule = __non_webpack_require__.main;
const moduleFilename = mainModule && mainModule.filename || '';
if (moduleFilename === __filename || moduleFilename.includes('iisnode')) {
 run();
}

export * from './src/main.server';