jQuery帖子待定

Question

When a user drops multiple images on a 'drop zone' in one of my pages, I use jQuery to loop through the files in evt.originalEvent.dataTransfer.files and upload each of the images using a jQuery post call. This was working fine up until a few days ago, but it has since stopped working. Now only one or two of the post calls succeed, the rest end up stuck in a 'pending' state. The jQuery call I'm using is:

$.ajax({
  type: "POST",
  url: url,
  contentType: "application/json",
  processData: false,
  data: JSON.stringify(data),
  dataType: 'json'
})
.done(function(dbResp, textStatus, jqXHR) {
  if(obj.type == 'imageAttachment') {
    return ctx.insertNewImage(dbResp);
  }
  ctx.insertNewFile(dbResp);
})
.fail(function(jqXHR, textStatus, error) {
  var msg = 'Error(s) were encountered during file upload: ';
  msg += jqXHR.status + " " + jqXHR.statusText;
  notify(msg, 'error');
});

My server (nodejs) sends a 200 response back with a JSON object that contains information about the attachment document. I can see the response in Chrome's browser console, so I know it is being received, but the pending ajax post requests stay pending. Any idea on where I'm going wrong? Here's the response:

console.log('arguments: ', arguments);
0: Object
_id: "e4f4b9e80a9866c5efc728d00a8568ba"
_rev: "1-5dce4437e45dc030ace54f25a75de34a"
1: "success"
2: Object