Custom resource-path

Maybe to add: so what you can do is the following URL:

url: '//177.77.88.88/api/v2/order?n1=' + scriptname + '&n2=' + user,

And pick this up on the server side (e.g. V8js)

//input variables
var params = event.request.parameters;
var procedure = params.n1;
var user = params.n2;

if (procedure === "confirm") {
        //do something
} else {
        //do something else
}

return "something";

But I would personally create multiple scripts and just call these. It makes it easier I would say, unless there are many functions you want to reuse and you don't want to call scripts on the server side.