1
2// Dopo tutte le altre route
3
4app.get('*', function(req, res, next) {
5    var err = new Error();
6    err.status = 404;
7    next(err);
8});
9
10app.use(function(err, req, res, next) {
11    if (err.status === 404) {
12        var data = {
13            title: '404 Not Found',
14            content: 'Oops, page not found!';
15        };
16        res.render('pages/404', data);
17    } else {
18        return next();
19    }
20});
21
22

1app.use(function(req, res, next){
2  res.status(404);
3
4  // respond with html page
5  if (req.accepts('html')) {
6    res.render('404', { url: req.url });
7    return;
8  }
9
10  // respond with json
11  if (req.accepts('json')) {
12    res.send({ error: 'Not found' });
13    return;
14  }
15
16  // default to plain-text. send()
17  res.type('txt').send('Not found');
18});

1app.use(function(req, res, next){
2  res.status(404);
3
4  // respond with html page
5  if (req.accepts('html')) {
6    res.sendFile('index.html');
7    return;
8  }
9
10  // respond with json
11  if (req.accepts('json')) {
12    res.send({
13      status: 404,
14      error: 'Not found'
15    });
16    return;
17  }
18
19  // default to plain-text. send()
20  res.type('txt').send('404 - Not found');
21});

1app.use(function (req, res, next) {
2  res.status(404).send("Sorry can't find that!")
3})
4