But you can and should plug in another memory store middleware when deploying a serious product. This module expands the Express request object with the session property (among other things), which itself is an object that can be used by other middleware.īy default it uses a MemoryStore, an in-memory key-value database not intended for production use, to store the session data. They rely upon saving session data to a cookie that is sent to the user’s browser and then received back in future user requests. Sessions are used for storing data about a user and presenting dynamic data based on a user’s identity. It expands on some key objects provided by both Express and Node.js. express-sessionĮxpress-session is an Express middleware used for persisting sessions across stateless HTTP requests. Now let’s go over the building blocks for sessions and authentication, one by one. If you’ll recall, Express works with a request-response cycle in which callback functions are tied to specific routes and have access to request and response objects, like so: passport-local-mongoose – for easy authentication logic. passport-local – for a local authentication strategy.I’ll be using the following npm packages along with Express: This article aims to change that by going in-depth into how these concepts are implemented in Express based on my own understanding of the two. Understanding how sessions and local authentication work in Express is something that is not as clearly documented on the Internet as you’d might expect.
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