当您试图发送跨站点请求时发生此错误。 我怎么解决这个问题?

在nginx配置文件中添加

add_header Access-Control-Allow-Origin '*.domain.com'
add_header Access-Control-Allow-Credentials 'true';

在“domain.com”中，我试图发送ajax请求

$.ajax({
   url: sub.domain.com,
   xhrFields: {
      withCredentials: true
   }
});

AJAX调用仅在您调用的url与调用脚本在同一域中时发送cookie。

这可能是一个跨域问题。

也许你试图从www.domain-a.com调用一个url，而你的调用脚本在www.domain-b.com上(换句话说:你进行了跨域调用，在这种情况下浏览器不会发送任何cookie来保护你的隐私)。

在这种情况下，你的选择是:

Write a small proxy which resides on domain-b and forwards your requests to domain-a. Your browser will allow you to call the proxy because it's on the same server as the calling script.This proxy then can be configured by you to accept a cookie name and value parameter which it can send to domain-a. But for this to work you need to know the cookie's name and value your server on domain-a wants for authentication. If you're fetching JSON objects try to use a JSONP request instead. jQuery supports these. But you need to alter your service on domain-a so that it returns valid JSONP responds.

如果这能帮到你就好了。

如果您正在localhost或localhost上的端口(如localhost:8080)上进行开发，除了上面回答中描述的步骤外，还需要确保您没有在Set-Cookie报头中传递域值。 您不能在set - cookie报头中将域设置为localhost -这是不正确的-只需省略域即可。

查看cookie在本地主机与显式域和为什么asp.net不会在本地主机创建cookie ?

There are already a lot of good responses to this question, but I thought it may be helpful to clarify the case where you would expect the session cookie to be sent because the cookie domain matches, but it is not getting sent because the AJAX request is being made to a different subdomain. In this case, I have a cookie that is assigned to the *.mydomain.com domain, and I am wanting it to be included in an AJAX request to different.mydomain.com". By default, the cookie does not get sent. You do not need to disable HTTPONLY on the session cookie to resolve this issue. You only need to do what wombling suggested (https://stackoverflow.com/a/23660618/545223) and do the following.

1)在ajax请求中添加以下内容。

xhrFields: { withCredentials:true }

2)在不同子域的资源的响应头中添加以下内容。

Access-Control-Allow-Origin : http://original.mydomain.com
Access-Control-Allow-Credentials : true

当您试图发送跨站点请求时发生此错误。 我怎么解决这个问题?

在nginx配置文件中添加

add_header Access-Control-Allow-Origin '*.domain.com'
add_header Access-Control-Allow-Credentials 'true';

在“domain.com”中，我试图发送ajax请求

$.ajax({
   url: sub.domain.com,
   xhrFields: {
      withCredentials: true
   }
});

使用

xhrFields: { withCredentials:true }

作为我的jQuery ajax调用的一部分只是解决方案的一部分。我还需要有从我的资源的选项响应返回的头:

Access-Control-Allow-Origin : http://www.wombling.com
Access-Control-Allow-Credentials : true

重要的是，OPTIONS调用的响应头中只有一个允许的“origin”，而不是“*”。我通过从请求中读取源并将其填充回响应来实现这一点——可能绕过了限制的最初原因，但在我的用例中，安全性并不是最重要的。

我认为有必要明确地提到只有一个源的要求，因为W3C标准允许空格分隔列表，但Chrome不允许! http://www.w3.org/TR/cors/#access-control-allow-origin-response-header 注意“在实践中”的部分。