如何使用AjaxPrefilter？

Question

Can you please explain to me the simplest way on how the AJAX prefiltering in jQuery works? Sorry I'm a newbie in using AJAX.

Is it for customizing requests in the server? Thanks.

I'm referring to this site but still can't get it.

Answer 1

Have a read of the documentation at http://api.jquery.com/jquery.ajaxprefilter/ this function is basically used to alter the data that is sent through to your server before it is sent.

An example I have used specifically is

$.ajaxPrefilter(function (options, originalOptions, jqXHR) {
    options.data = $.param($.extend(originalOptions.data||{}, {
        timeStamp: new Date().getTime()
    }));
});

Which takes the original data that was to be sent through an adds another parameter with a timestamp. This was useful to get around iOS's problem with caching post requests without having to add a timestamp to each individual request.