How to get pure XMLHTTPRequest object in jQuery 1.5?

Question

My code works fine in jquery 1.4 and i try upgrade it to 1.5. But this part of code stop working - its standard beforeSend handler

beforeSend: function (xhr,         


        

Answer 1

If your beforeSend was global:

var oldXHR = jQuery.ajaxSettings.xhr;
jQuery.ajaxSettings.xhr = function() {
    var xhr = oldXHR();
    if(xhr instanceof window.XMLHttpRequest) {
        xhr.upload.addEventListener('progress', on_progress, false);
        xhr.upload.addEventListener('load', on_loaded, false);
        xhr.addEventListener('abort', on_abort, false);
    }
    return xhr;
};

If your beforeSend was specific to a particular request:

$.ajax({
    xhr: function() {
        var xhr = jQuery.ajaxSettings.xhr();
        if(xhr instanceof window.XMLHttpRequest) {
            xhr.upload.addEventListener('progress', on_progress, false);
            xhr.upload.addEventListener('load', on_loaded, false);
            xhr.addEventListener('abort', on_abort, false);
        }
        return xhr;
    }
});