uploading picture functionality

app.post('/upload', function(req, res, next) {
    var is = fs.createReadStream(req.files.upload.path),
        fileType = getExtention(is.fileName)
        os = fs.createWriteStream('public/images/users/' + req.session.adress + '.' + fileType);
});


function getExtension(filename) {
    var ext = path.extname(filename||'').split('.');
    return ext[ext.length - 1];
}

//function getExtension(filename) {
    //var i = filename.lastIndexOf('.');
  //  return (i < 0) ? '' : filename.substr(i);
//}