Ah, I see, you want array buffer. OK. Can you then make some verbose comment why `http` and jQuery is not good enough?

BTW, on the server side we patched Meteor to support this, we could add a simple patch for this also on the client side. :-) See: https://github.com/peerlibrary/meteor/commit/b046309c3e756c4ebb508d69112b7f3cf9c8b2ac