WebDev with Node and Express => Rendering content with Express

rendering.js

// basic usage
app.get('/about', function (req, res) {
  res.render('about');
});

// response codes other than 200
app.get('/error', function (req, res) {
  res.status(500);
  res.render('error');
});

// response codes other than 200 (on one line)
app.get('/error', function (req, res) {
  res.status(500).render('error');
});

// Passing context to a view including querystring, cookie, and session values
app.get('/greeting', function (req, res) {
  res.render('about', {
    message: 'welcome',
    style: req.query.style,
    userid: req.cookie.userid,
    username: req.session.username
  });
});

// rendering a view without a layout
  // the following layout doesn't have a layout file, so views/no-layout.handlebars
  // must include all necessary HTML
app.get('/no-layout', function (req, res) {
  res.render('no-layout', { layout: null });
});

// rendering a view with a custom layout
  // the layout files views/layouts/custom.handlebars will be used
app.get('/custom-layout', function (req, res) {
  res.render('custom-layout', { layout, 'custom' });
});

// rendering plaintext output
app.get('/test', function (req, res) {
  res.type('text/plain');
  res.send('This is a test');
});

// Adding an error handler
  // This should appear AFTER all of your routes, note that even
  // if you don't need the 'next' function, it must be included 
  // for Express to recognize this as an error handler
  app.use(function (err, req, res, next) {
    console.log(err.stack);
    res.status(500).render('error');
  });
  
// Adding a 404 handler
  // this should appear AFTER all of your routes
app.use(function (req, res) {
  res.status(404).render('not-found');
});