def delete():
    filename = request.args(0)
    if not filename:
        raise HTTP(401, 'Required argument filename missing.')
        
    db = current.plugin_ckeditor.db
    table_upload = current.plugin_ckeditor.settings.table_upload
    db(table_upload.upload == filename).delete()
    
    # delete the file from storage
    current.plugin_ckeditor.unlink(filename)