Http Status code 304 in ajax is technically a valid response code that could be returned from the server when performing a GET. It indicates that the page has not been changed and the page in the browser’s cache should be used. In Firefox, the XMLHttpRequest status property will return “200” if the server responds with “200” or “304”. IE will also return status code 200 in the XMLHttpRequest GET response, so a solid implementation of your callback function does not need to check for both codes. radAjax currently throws an error for any response that does not return code 200. The XMLHttpRequest has several properties that we’re interested in during our response callback ajax functions.

Tags: Ajax security, Ajax-security, http, http-304