plex-web-downloader/bin/www

#!/usr/bin/env node
 //One begins with the clustering
 var cluster = require('cluster');

 // Code to run if we're in the master process
 if (cluster.isMaster) {
   // Count the machine's CPUs
   var cpuCount = require('os').cpus().length;

   // Create a worker for each CPU
   for (var i = 0; i < cpuCount; i += 1) {
      console.log('Création du fork ' + i);
      cluster.fork();
   }

   // Listen for dying workers
   cluster.on('exit', function (worker) {
       // Replace the dead worker, we're not sentimental
       console.log('Worker ' + worker.id + ' died :(');
       cluster.fork();
       console.log('Remplacement du worker ');
   });

 // Code to run if we're in a worker process
 } else {
   /**
    * Module dependencies.
    */
  var app = require('../app');
  var debug = require('debug')('plex_webdown:server');
  var http = require('http');

  /**
   * Get port from environment and store in Express.
   */

  var port = normalizePort(process.env.PORT || '3000');
  app.set('port', port);

  /**
   * Create HTTP server.
   */

  var server = http.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) {
  var 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() {
  var addr = server.address();
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}