Angular v17 server.ts file for SSR and Prerender support.

server.ts

/* eslint-disable @typescript-eslint/no-explicit-any */
/* eslint-disable no-extra-semi */
/* eslint-disable @typescript-eslint/no-var-requires */
import "zone.js/node";

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

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

import { getWindow, getDocument } from "ssr-window";
(global as any).window = getWindow();
(global as any).document = getDocument();
(global as any).navigator = {
  language: "en",
};

// const domino = require("domino");
// const fs = require("fs");
// const path = require("path");
// const template = fs
//   .readFileSync(path.join(".", "dist/blog-fe/browser", "index.html"))
//   .toString();
// const win = domino.createWindow(template);

// global["window"] = win;
// global["document"] = win.document;
// global["DOMTokenList"] = win.DOMTokenList;
// global["Node"] = win.Node;
// global["Text"] = win.Text;
// global["HTMLElement"] = win.HTMLElement;
// global["navigator"] = win.navigator;
// global["MutationObserver"] = getMockMutationObserver();
// global["requestAnimationFrame"] = function (callback) {
//   let lastTime = 0;
//   const currTime = new Date().getTime();
//   const timeToCall = Math.max(0, 16 - (currTime - lastTime));
//   const id = window.setTimeout(function () {
//     callback(currTime + timeToCall);
//   }, timeToCall);
//   lastTime = currTime + timeToCall;
//   return id;
// };
// global["cancelAnimationFrame"] = function (id) {
//   clearTimeout(id);
// };

// function getMockMutationObserver() {
//   return class {
//     observe(node, options) {}
//     disconnect() {}
//     takeRecords() {
//       return [];
//     }
//   };
// }

// 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/blog-fe/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: AppServerModule,
    })
  );

  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",
    }) as any
  );

  server.use(function (req, res, next) {
    (req as any).start = Date.now();
    next();
  });

  // All regular routes use the Universal engine
  server.get("*", (req, res) => {
    console.log(
      "# render via universal engine, url: " + req.headers.host + req.url
    );
    res.render(indexHtml, {
      req,
      providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }],
    });
  });

  server.use(function (req) {
    const time = Date.now() - (req as any).start;
    console.log("time: " + time);
  });

  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";