Node express request handler that returns Facebook channel.html with one-year expiration.

gistfile1.js

// Return Facebook channel.html with one-year expiration.
app.get('/channel.html', function(req, res) {
  var channelDoc = '<script src="//connect.facebook.net/en_US/all.js"></script>';
  res.set({
    'Content-Type': 'text/html',
    'Content-Length': channelDoc.length,
    'Pragma': 'public',
    'Cache-Control': 'max-age=31536000',
    'Expires': new Date(Date.now() + 31536000000).toUTCString()
  });
  res.end(channelDoc);
});