@netcentric/cm-notify/server/createHttpServer.js

Adobe Cloud Manager Pipeline Notifications to Slack, Teams and Email

const { createServer } = require('node:http');

/**
 * Create an HTTP server.
 * @param app
 * @param serverPort
 */
function createHttpServer(app, serverPort) {
  /**
   * Get port from the environment and store in Express.
   */
  const port = normalizePort(serverPort);
  app.set('port', port);

  /**
   * Create an HTTP server.
   */
  const server = createServer(app);

  /**
   * Listen on provided port, on all network interfaces.
   */
  server.listen(port);
  server.on('error', onError);
  server.on('listening', onListening);

  /**
   * Normalize a port into a number, string, or false.
   */
  function normalizePort(val) {
    const port = parseInt(val, 10);

    if (isNaN(port)) {
      // named pipe
      return val;
    }

    if (port >= 0) {
      // port number
      return port;
    }

    return false;
  }

  /**
   * Event listener for HTTP server "error" event.
   */
  function onError(error) {
    if (error.syscall !== 'listen') {
      throw error;
    }

    var bind = typeof port === 'string'
      ? 'Pipe ' + port
      : 'Port ' + port;

    // handle specific listen errors with friendly messages
    switch (error.code) {
      case 'EACCES':
        console.error(bind + ' requires elevated privileges');
        process.exit(1);
        break;
      case 'EADDRINUSE':
        console.error(bind + ' is already in use');
        process.exit(1);
        break;
      default:
        throw error;
    }
  }

  /**
   * Event listener for HTTP server "listening" event.
   */
  function onListening() {
    const addr = server.address();
    const bind = typeof addr === 'string'
      ? 'pipe ' + addr
      : 'port ' + addr.port;
    console.log('Listening on ' + bind);
  }

  return server;
}

module.exports = { createHttpServer };