Meteor - Excel File Upload without storing file

I would like the user to be able to upload a file through a file input and the client would send the file to the server and the server would parse the file without storing it in the database, is this possible?

Something like this:

  'change input': function(e, t) {
        let file =[0];
        let extension =".").pop();
        if (['xlsb', 'xls', 'xlsx'].indexOf(extension) < 0) {
"error", `Invalid file extension`);
          return false;
        } else {
"upload.factual.achievements", file, function(err, res){
    "error", `There was an error : ${error.reason}.`);
            } else {