在配置 $ httpProvider 的文件中，添加此行以指定您要发送包含跨站点请求的凭据：

In the file where you configure your $httpProvider, add this line to specify you want to send credentials with cross-site requests:

$httpProvider.defaults.withCredentials = true;

通常，AngularJS会自动发送这些带有请求的cookie（针对同源请求）但是因为您的请求是跨站点然后你必须手动配置它。

Typically, AngularJS will automatically send these cookies with requests (for same-origin requests) but since your requests are cross-site then you have to manually configure this.