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In web development, managing user sessions is a crucial aspect of building applications that require user authentication. A session allows you to store information specific to a user across multiple requests. This tutorial will guide you through the process of managing user sessions using cookies and sessions in Express.js.
A cookie is a small piece of data stored on the client's browser. It is typically used to identify a user or retain state information between page requests. When a server sends a response with a Set-Cookie header, the browser stores this cookie and includes it in subsequent requests to the same domain.
A session is a way to store information about a user across multiple HTTP requests. Unlike cookies, which are stored on the client side, sessions are stored on the server. The server uses a unique session ID (often stored as a cookie) to identify each session.
In Express.js, you can use middleware like express-session to manage sessions easily.
First, let's set up an Express application and configure it to use sessions.
In the next section, we will explore user authentication using Passport.js, which simplifies the process of adding authentication to your Express application.
By understanding cookies and sessions in Express.js, you can build more secure and interactive web applications.