In order to use CKEDITOR in my Google App Engine (GAE) Python app, I need to replace "config.filebrowserImageUploadUrl" with a URL generated by GAE's uploader functionality.
The generated URL is only good for ten minutes, and since a user might be editing for more than ten minutes, I can't set the URL at the time the user begins to edit. I need to wait until the user clicks the "Image" icon. Even better would be to perform this work when the user clicks the "Upload" tab on the "Image" pop-up. Either way, I plan to then use an Ajax call to obtain a freshly generated URL.
By the way, I'm using CKEDITOR.inline() to create the editor instance, if that affects what the answer is to this question.