Middleware to attach a user to the request object because nodejs/express does not do that for you out of the box.
Say i have a controller that need to check whether a user is of certain role in order to let them access a certain resource. Then this middleware will be helpful as it makes a user available to this function. Then i can do something like user.role === <some_role> ? do_something: do_this
Here is how i might implement it.
/**
* @param {Request} req
* @param {Response} res
*/
const userIsAuthenticatedMiddleware = async (req, res, next) => {
const token = req.headers["authorization"]?.split(" ")[1];
if (!token) return res.status(401).json({ message: "Access denied" });
try {
jwt.verify(token, process.env.JWT_SECRET, (error, user) => {
if (error) return res.status(401).json({ message: "Wrong token" });
req.user = user;
next();
});
} catch (error) {
return res.status(500).json({ message: "Internal Server Error" });
}
};
Enhanced User Management: Middleware allows the backend to authenticate users and control access to premium or admin-level features in apps like Instander APK.
Premium Features: Ensure that only users with the "premium" role can access advanced features such as high-quality media downloads.
Security: Middleware acts as a checkpoint to verify the legitimacy of users and their roles before processing sensitive requests.
This approach provides a scalable way to handle user roles and permissions for an app like Instander APK ensuring a secure and user-friendly experience.