title: ckeditor : set header while uploading an image
body: <p>I am using CKeditor 4. In that <code>Image</code> plugin.</p>
  
  <p>I have removed unwanted tabs on Image popup and also set the <code>config.filebrowserImageUploadUrl</code> to my server's URL. </p>
  
  <p>Now I have to upload the image, I am able to select the image, then when I click on <code>Send it to server</code> button, AJAX call goes to my server, But my server requires a particular header set for authentication.</p>
  
  <p>Question is - can I set the header before sending that request ?</p>