How to cancel user upload in Formidable (Node.js)?

Question

I have been working on this problem for two days now, and I am stuck. I am using Node.js with Express, and I am trying to implement an upload form. Basically, I want the form to

Answer 1

Form.pause actually will prevent browser sending more data. Call below function did it for me:

var closeConnection = function(res, form){
    try{
    if (!res.ended){
        form.onPart=null;
        form.pause();
        res.end();
        res.ended = true;
    }
    }catch(e){console.log(e);}
}

Answer 2

Some time has passed and now you can use multer instead of formidable or multiparty. Multer has desired functionality built in.