How to save post values in db of type xhr in mongoose

I am using mongoose as my back end and I am sending an xhr request(post) to my server in which the field values are sent like in the screen-shot below

This is my server code ,when i try to console my values it shows empty even i send the values.Can anyone please help me.Thanks in advance.

 exports.addTest = function (req, res) { 
    var params = req.params;
    var body = req.body;
    console.log(JSON.stringify(params, null, 4));
    console.log(JSON.stringify(body, null, 4));
    var blogsModel = new blogs(params); 
    blogsModel.save(function (err, results) {
        if (err) {
            return console.error(err);
        }
        res.json(results);
    });
};

via MMR