Mastering MEAN Web Development Expert Full Stack JavaScript (Video 22)

This video tutorial explores the use of Express middleware to process requests and validate user data. It covers the installation and configuration of JWT middleware to secure API routes, ensuring that only authenticated users can access certain endpoints. The tutorial also addresses user authentication and authorization, highlighting the need for custom middleware to validate user actions and prevent unauthorized access. By the end, viewers will understand how to secure their API using Express middleware effectively.

What is the primary role of middleware in an Express application?

• To serve static files

• To manage user sessions

• To process requests and validate data

• To handle database connections

Why is it important to include a token in requests to certain API endpoints?

• To authenticate the user making the request

• To encrypt the request data

• To reduce server load

• To increase the speed of the request

What is the purpose of configuring JWT middleware in an Express app?

• To handle file uploads

• To log all incoming requests

• To validate and decrypt tokens for secure routes

• To compress response data

How does the custom middleware ensure that a user can only edit their own profile?

• By checking the user's IP address

• By comparing the user ID in the token with the requested user ID

• By checking the user's role

• By verifying the user's email address

Why is the order of middleware important in Express?

• Because it alters the request method

• Because it changes the response format

• Because it determines the sequence of operations on a request

• Because it affects the server's performance