Securing the Node.js webhook for Dialogflow

You will now make slight modifications to the Node.js code in order to secure the webhook. The one you deployed is not secure and anyone can access it.

1. Go to Dialogflow and to the Fulfillment section.
2. In the headers, add the key mysecret and the value 12345.

The following screenshot shows the security header added to the webhook:

Securing the webhook

3. Edit server.js. Add code that extracts the mysecret key using let secret = req.get("mysecret"). Then, check the value and see if it is equal to 12345. If it is equal, process the request, and if not, return a 403 access denied response return response.status(403).end('Access denied!').

The following code shows the modified code that secures the webhook:

app.post('/fortuneCookie', function (req, res) {
    let secret = req.get("mysecret");
    if...