The Request Object (req)

The req object represents the HTTP request and has properties for the request query string, parameters, body, HTTP headers, and so on.

Core Properties

Accessing URL Parameters

// Route: /api/users/:id
app.get('/api/users/:id', (req, res) => {
  console.log(req.params.id);
  res.send('User ID is ' + req.params.id);
});

Checking Headers

You can check if a request contains specific authorization or metadata.

app.get('/admin', (req, res) => {
  const adminKey = req.get('x-admin-key'); // Get header
  if (adminKey === 'SECRET') {
    res.send('Welcome Admin');
  } else {
    res.status(403).send('Forbidden');
  }
});