Upload images from URL to AWS using CollectionFS on sucessfull method call

help
1

Hello !

I am trying to upload some images to AWS when I return from a Meteor method call.
So far I wrote this :

  Meteor.call("insertNewAd", dataToBeInserted, function(error, result){
  if(error){
    console.log("Error while occurred in db", error);
  }
  if(result){
    console.log("Insertion sucessful " + result);
    var fileObj = new FS.File();
    console.log("step1");
    fileObj.attachData(dataToBeInserted.urlImages[0]);
    console.log("step2");
    Files.insert(fileObj);
    console.log("step3");
  }
});

However this fails (after step1) with the error :

  Exception in delivering result of invoking 'insertNewAd':
  fsFileAttachData@http://localhost:3000/packages/cfs_file.js?246cf3116c9b9839564e22bd58f735e95bcbcb59:116:1

Please note that the image is on a remote server and submitted to same origin policy. However from cfs documentation :

Note that when you pass a URL on the client, the actual data download
from that URL happens on the server, so you don’t need to worry about
CORS.

I am not restricted on CollectionFS, so there is another solution, I will take it
Thank you !