Ajax跨域请求COOKIE无法带上的解决办法

1$.ajax({
2    type:"get",
3    dataType:"json",
4	url: "http://sso.test.com/userinfo",
5	crossDomain:true,
6	xhrFields: {
7        withCredentials: true
8	},
9	success: function(ret){
10        console.log(ret);
11	}
12});