如何在extjs 3.4中处理用于ajax调用的windows auth握手(401)？

Ext.Ajax.request({
    url: 'your_url',
    method: 'GET',
    headers: {
        'Authorization': 'Negotiate'
    },
    success: function(response) {
        // 请求成功处理逻辑
    },
    failure: function(response) {
        if (response.status === 401) {
            // 捕获到401状态码，进行Windows身份验证握手
            var cookies = Ext.util.Cookies.get(document.location.hostname);
            Ext.Ajax.request({
                url: 'your_url',
                method: 'GET',
                headers: {
                    'Authorization': 'Negotiate ' + cookies
                },
                success: function(response) {
                    // 请求成功处理逻辑
                },
                failure: function(response) {
                    // 请求失败处理逻辑
                }
            });
        }
    }
});