req.cookies with cookie-parser in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the cookie-parser middleware.

Express

const express = require('express');
const cookieParser = require([1]);

Drag options to blanks, or click blank then click option'

A'cors'

B'express'

C'body-parser'

D'cookie-parser'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'express' instead of 'cookie-parser' in require.

Confusing cookie-parser with body-parser.

The cookie-parser package is imported by requiring 'cookie-parser'.

2fill in blank

medium

Complete the code to use cookie-parser middleware in the Express app.

Express

const app = express();
app.use([1]());

Drag options to blanks, or click blank then click option'

Aexpress.json

BcookieParser

Cexpress.urlencoded

Dcors

Attempts:

3 left

💡 Hint

Common Mistakes

Using express.json() instead of cookieParser().

Forgetting to call the function with parentheses.

To enable cookie parsing, you use cookieParser() as middleware.

3fill in blank

hard

Fix the error in accessing cookies from the request object.

Express

app.get('/', (req, res) => {
  const userCookie = req.[1].user;
  res.send(`User cookie: ${userCookie}`);
});

Drag options to blanks, or click blank then click option'

Acookies

Bcookie

Cheaders

Dparams

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.cookie instead of req.cookies.

Trying to access cookies from req.headers directly.

Cookies parsed by cookie-parser are available on req.cookies.

4fill in blank

hard

Fill both blanks to set up cookie-parser with a secret and access signed cookies.

Express

const cookieParser = require('cookie-parser');
app.use(cookieParser([1]));

app.get('/signed', (req, res) => {
  const signedCookie = req.[2].token;
  res.send(`Signed cookie: ${signedCookie}`);
});

Drag options to blanks, or click blank then click option'

A'mySecret'

Bcookies

CsignedCookies

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Passing null or no secret when signed cookies are needed.

Accessing signed cookies from req.cookies instead of req.signedCookies.

Passing a secret string to cookie-parser enables signed cookies, which are accessed via req.signedCookies.

5fill in blank

hard

Fill all three blanks to create a route that reads a cookie and sets a new cookie.

Express

app.get('/cookie', (req, res) => {
  const oldValue = req.[1].sessionId;
  res.cookie([2], 'abc123', { httpOnly: true });
  res.send(`Old session: ${oldValue}`);
});

Drag options to blanks, or click blank then click option'

Acookies

B'sessionId'

DsignedCookies

Attempts:

3 left

💡 Hint

Common Mistakes

Using req.signedCookies when the cookie is not signed.

Forgetting to put cookie name in quotes when setting cookie.

Cookies are read from req.cookies. To set a cookie, use res.cookie('cookieName', value). Here, the cookie name is 'sessionId'.