before发送$ .ajaxSetup + beforeSend $ .ajax

Question

为解决CSRF问题,我使用Ajax的客户端设置:

$.ajaxSetup({
    beforeSend: function(xhr, settings) {
        function getCookie(name) {
            var cookieValue = null;
            if (document.cookie && document.cookie != '') {
                var cookies = document.cookie.split(';');
                for (var i = 0; i < cookies.length; i++) {
                    var cookie = jQuery.trim(cookies[i]);
                    // Does this cookie string begin with the name we want?
                    if (cookie.substring(0, name.length + 1) == (name + '=')) {
                        cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                        break;
                    }
                }
            }
            return cookieValue;
        }
        if (!(/^http:.*/.test(settings.url) || /^https:.*/.test(settings.url))) {
            // Only send the token to relative URLs i.e. locally.
            xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken'));
        }
    }
});

直到今天,一切都很好.但现在我需要在发布之前做一些检查:

var check;
//...
$.ajax({
    //...
    beforeSend: function(xhr){
        if (check == 1){
            xhr.abort();
        }
    },
    success: function(data){
        //...
    }
});

CSRF验证失败.请求中止.据我了解,我只是取消了ajaxSetup对新函数的操作.如何结合这两件事？

Answer 1

用$(document).ajaxSend(function(ev, jqhr, settings) { ... })而不是.ajaxSetup.

正如您所说,.ajaxSetup定义了一个默认处理程序,然后可以覆盖它.有了.ajaxSend你可以注册多个处理程序,火是发送一个Ajax请求之前.适用于自定义beforeSend处理程序.