ExpressJs

$.post("/process", {name:'john'}, function(data){
    // Do some stuff
});


Code:
app.post('/process', function(req, res){
    var data = '';

    if(req.xhr){
        data += 'One';
    }

    if(req.body.name){
        data += 'Two';
    }

    res.send(data);
});