D-Net

import 'zone.js/dist/zone-node';

import { ngExpressEngine } from '@nguniversal/express-engine';

import * as express from 'express';

import * as compression from 'compression';

import { join } from 'path';

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

import { APP_BASE_HREF } from '@angular/common';

import { existsSync } from 'fs';

import {Prometheus} from "./prometheus";

import {Counter} from "prom-client";

import {REQUEST, RESPONSE} from "./src/app/openaireLibrary/utils/tokens";

// The Express app is exported so that it can be used by serverless Functions.

export function app() {

  const server = express();

  server.use(compression());

  const distFolder = join(process.cwd(), 'dist/aggregator/browser');

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

  const prometheus: Prometheus = new Prometheus();

  // 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'

  }));

  server.get('/metrics', (req, res) => {

    res.set('Content-Type', prometheus.register.contentType);

    res.end(prometheus.register.metrics());

  });

  // All regular routes use the Universal engine

  server.get('*', (req, res) => {

    let start = new Date();

    let counter: Counter = prometheus.counters.get(req.path);

    if(counter !== undefined) {

      counter.inc(1, new Date());

      res.render(indexHtml, {

        req, providers: [

          {

            provide: APP_BASE_HREF,

            useValue: req.baseUrl

          },

          {

            provide: REQUEST, useValue: (req)

          },

          {

            provide: RESPONSE, useValue: (res)

          }

        ]

      });

      // event triggers when express is done sending response

      res.on('finish', function() {

        console.log(new Date().getTime() - start.getTime());

      });

    } else {

      res.render(indexHtml, {

        req, providers: [

          {

            provide: APP_BASE_HREF,

            useValue: req.baseUrl

          },

          {

            provide: REQUEST, useValue: (req)

          },

          {

            provide: RESPONSE, useValue: (res)

          }

        ]

      });

    }

  });

  return server;

}

function run() {

  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';