express app.get('domain') code example

Example 1: express get request origin

app.use((req, res, next) => {
  const host = req.get('host');
  const origin = req.get('origin');
});

Example 2: http header express

app.get('/', (req, res) => {
  req.header('User-Agent')
})
// Use the Request.header() method to access
//one individual request header’s value