Notes/bin/www

#!/usr/bin/env node

process.on('unhandledRejection', error => {
    // this makes sure that stacktrace of failed promise is printed out
    console.log(error);

    // but also try to log it into file
    require('../services/log').info(error);
});

const app = require('../app');
const debug = require('debug')('node:server');
const http = require('http');

/**
 * Get port from environment and store in Express.
 */
const port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */
const 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) {
    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;
    }

    const 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;

    debug('Listening on ' + bind);
}