server.ts

import 'zone.js/node';

import { APP_BASE_HREF } from '@angular/common';
import { ngExpressEngine } from '@nguniversal/express-engine';
import * as express from 'express';
import { existsSync } from 'fs';
import { join } from 'path';

import 'localstorage-polyfill';
import compression from 'compression';

import { AppServerModule } from './src/main.server';

// ----------------------------------------------
// window for image lazy loading
// ----------------------------------------------
/* eslint-disable */
const domino = require('domino');
const fs = require('fs');
const path = require('path');
const template = fs.readFileSync(path.join(__dirname, '../browser', 'index.html')).toString();
const win = domino.createWindow(template);
global['window'] = win;
global['Node'] = win.Node;
global['navigator'] = win.navigator;
global['Event'] = win.Event;
global['KeyboardEvent'] = win.Event;
global['MouseEvent'] = win.Event;
global['Event']['prototype'] = win.Event.prototype;
global['document'] = win.document;
global['localStorage'] = localStorage;
global['WebSocket'] = require('ws');
/* eslint-enable */

// 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(__dirname, '../browser');
  const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

  // Some seo options
  server.use(compression({ level: 1 }));
  server.disable('x-powered-by');

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

  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 }],
      },
      (err, html) => {
        if (err) {
          console.log(err);
        }
        res.send(html);
      }
    );
  });

  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';