checkLogin.js

/**
     * Check logged status in order to
     * give permission to following links.
     */
    api.use(function (req, res, next) {
        console.log("Somebody logged into system");
        var token = req.body.token || req.param('token') || req.headers['x-access-token'];

        // Check if token exists.
        if (token) {
            jsonwebtoken.verify(token, secretKey, function (err, decoded) {
                if (err) {
                    res.status(403).send({success: false, message: "Failed to authenticate"});
                } else {
                    req.decoded = decoded;
                    next();
                }
            });
        } else {
            res.status(403).send({success: false, message: "No valid token provided"});
        }
    });