No file length about busboy HOT 1 OPEN

at index.js line 90: modified source code bellower:
function onFile(fieldname, file, filename, encoding, mimetype) {
if (checkFile) {
// var err = checkFile(fieldname, file, filename, encoding, mimetype)
// if (err) {
// // make sure request stream's data has been read
// var blackHoleStream = new BlackHoleStream();
// file.pipe(blackHoleStream);
// return onError(err)
// }
checkFile(fieldname, file, filename, encoding, mimetype, function (err) {
if (err) {
// make sure request stream's data has been read
var blackHoleStream = new BlackHoleStream();
file.pipe(blackHoleStream);
return onError(err)
}
})

}

======================then = at your app code =========
parts = parse(this, {
"checkFile": function (fieldname, file, filename, encoding, mimetype,cb) {
file.on("limit", function () {
var err = new Error('=====file size ======')
err.code = 'Request_fileSize_limit'
err.status = 400;
cb(err);
//return err;
});

        }, "limits": { "fileSize": 10000000 }
    });

from busboy.