通过ajax帖子发送Blob

Question

I am trying to send an audio blob over to my Rails action through an ajax POST. I seem to get over to the Rails action but the data I am sending appears to be empty and my audio file is not saved. I can do this with simple javascript, but I cannot seem to get this to work with ajax.

Ajax not working:

function sendRecToPostAjax(blob){

    var data = new FormData();
    data.append("audio", blob, (callid + ".oga"));
    data.append('callid', callid);

    return $.ajax({
        url: '/controller/action',
        type: 'POST',
        cache: false,
        data: data,
        processData: false,
        contentType: false
    });
}

JS working:

function sendRecToPost(blob) {

  var data = new FormData();
  data.append("audio", blob, (callid + ".oga"));
  data.append('callid', callid);

  var oReq = new XMLHttpRequest();
  oReq.open("POST", "/controller/action");
  oReq.send(data);

  oReq.onload = function(oEvent) {
      if (oReq.status == 200) {
          console.log("Uploaded");
      } else {
          console.log("Error " + oReq.status + " occurred uploading your file.");
      }
  };
}