Start download file in browser with asyncronous call

I use the following route to create a excel file. The Excel is created correctly, and is created in the root folder, where also is the template.xlsx i am using.

app.get('/proceso/:id', function(req, res)
{
            res.download( __dirname + "/report.xlsx")
});

If i call the route directly in the browser, for example localhost:7555/proceso/2 the file is generated and a download starts automatically.

I want to use an ajax get request to call the route,

function reporte_excel(idp){

$.ajax({
type : "GET",
contentType : "application/json",
url : "/proceso/"+ idp,
success: function (data)
    {
}

});
};

Now the file is generated but no download starts. Is there a way to start the download on client side inside of ajax success? Or how should the download be started on server side?

#javascript #node-js #ajax