Authentication and authorization are crucial elements in ensuring the security of a web application. In the Express.js environment, you can effectively implement user authentication and access authorization to secure resources. Here's a guide on how to accomplish this:
User Authentication
Use Authentication Middleware: Create an authentication middleware to check if the user is logged in.
Access Authorization to Secure Resources
Use Authorization Middleware: Create a middleware to check the user's access permission to secure resources.
Using Authentication and Authorization Libraries
Use Passport.js: Employ the Passport.js library to simplify authentication and authorization.
Conclusion
Authentication and authorization play a crucial role in safeguarding a web application from security threats. By utilizing middleware, libraries like Passport.js, and permission checks, you can ensure that users can only access appropriate and secure resources.