通过CORS通过Ajax请求在浏览器上设置Cookie

尝试实现一个ajax登录/注册过程(不具有身份验证的刷新站点)。使用cookies来保存状态。我以为我现在有这个权利，但是由于某种原因，浏览器在从服务器恢复之后不设置cookie。任何人可以帮助？以下是请求和响应标头：

Request URL:http://api.site.dev/v1/login
Request Method:POST
Status Code:200 OK

请求标头

Accept:application/json,text/plain,*/*
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Content-Length:57
Content-Type:application/json;charset=UTF-8
Host:api.site.dev
Origin:http://site.dev
Referer:http://site.dev/
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.11 (KHTML,like Gecko) Chrome/23.0.1271.101 Safari/537.11
withCredentials:true
X-Requested-With:XMLHttpRequest
Request Payload
{"email":"calvinfroedge@gmail.com","password":"foobar"}

回应标题

Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:X-Requested-With,Content-Type,withCredentials
Access-Control-Allow-Methods:GET,POST,PUT,DELETE,OPTIONS
Access-Control-Allow-Origin:http://site.dev
Connection:Keep-Alive
Content-Length:19
Content-Type:application/json
Date:Tue,08 Jan 2013 18:23:14 GMT
Keep-Alive:timeout=5,max=99
Server:Apache/2.2.22 (Unix) DAV/2 PHP/5.4.7 mod_ssl/2.2.22 OpenSSL/0.9.8r
Set-Cookie:site=%2B1THQQ%2BbZkEwTYFvXFVV5fxi00l2K%2B6fvt9SuHACTNsEwUGzDSUckt38ZeDsNbZSsqzHmPMWRLc84eDLZzh8%2Fw%3D%3D; expires=Thu,10-Jan-2013 18:23:14 GMT; path=/; domain=.site.dev; httponly
X-Powered-By:PHP/5.4.7

我也从Chrome服务器返回的Chrome网络工具中看到cookie：

回应曲奇

Name: site
Value: %2B1THQQ%2BbZkEwTYFvXFVV5fxi00l2K%2B6fvt9SuHACTNsEwUGzDSUckt38ZeDsNbZSsqzHmPMWRLc84eDLZzh8%2Fw%3D%3D
Domain: .site.dev
Path: /
Expires: Session
Size: 196
Http: ?

var req = new XMLHttpRequest();
    req.open('GET','https://api.bobank.com/accounts',true); // force XMLHttpRequest2
    req.setRequestHeader('Content-Type','application/json; charset=utf-8');
    req.setRequestHeader('Accept','application/json');
    req.withCredentials = true; // pass along cookies
    req.onload = function()  {
        // store token and redirect
        let json;
        try {
            json = JSON.parse(req.responseText);
        } catch (error) {
            return reject(error);
        }
        resolve(json);
    };
    req.onerror = reject;