healthcheck.js

/* -----------------------------------------------------------------------------
 *  Copyright (c) 2023, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program. If not, see <https://www.gnu.org/licenses/>.  
 *
 *  No Patent Rights, Trademark Rights and/or other Intellectual Property
 *  Rights other than the rights under this license are granted.
 *  All other rights reserved.
 *
 *  For any other rights, a separate agreement needs to be closed.
 *
 *  For more information please contact:  
 *  Fraunhofer FOKUS
 *  Kaiserin-Augusta-Allee 31
 *  10589 Berlin, Germany
 *  https://www.fokus.fraunhofer.de/go/fame
 *  famecontact@fokus.fraunhofer.de
 * -----------------------------------------------------------------------------
 */

const http = require('http');  // Use 'https' if your API is served over HTTPS

const PORT = process.env.PORT || 3000;

const options = {
  hostname: 'localhost',
  port: PORT, // Use 443 if using HTTPS
  path: '/health',
  method: 'GET',
  timeout: 5000, // 5 seconds timeout
};

const req = http.request(options, (res) => {
  if (res.statusCode === 200) {
    process.exit(0);
  } else {
    process.exit(1);
  }
});

req.on('error', (error) => {
  console.error(error);
  process.exit(1);
});

req.on('timeout', () => {
  console.error('Request timed out');
  req.destroy();
  process.exit(1);
});

req.end();