javascript - axios.create 和 CORS

Question

我正在使用 axios 向端点发出带有数据的 POST 请求:

这有效:

import axios from 'axios';

axios.post('https://example.com/v1/login', {
  name: 'myuser',
  password: 'mypassword',
});

但这并不

import axios from 'axios';

export const apiBase = axios.create({
  baseURL: "https://example.com/v1/",
  withCredentials: true,
  headers: {
    'Content-Type': 'application/json;charset=UTF-8',
  },
});

apiBase.post('login', {
  name: 'myuser',
  password: 'mypassword',
});

哪些日志:

Access to XMLHttpRequest at 'https://example.com/v1/login' 
from origin 'http://example.com' has been blocked by CORS policy: 
Response to preflight request doesn't pass access control check: The 
value of the 'Access-Control-Allow-Origin' header in the response must 
not be the wildcard '*' when the request's credentials mode is 
'include'. The credentials mode of requests initiated by the 
XMLHttpRequest is controlled by the withCredentials attribute.

实际上，此请求中没有添加 header 'Content-Type'。

有人知道这里出了什么问题吗？

<小时/>

编辑:修改以下评论

import axios from 'axios';

export const apiBase = axios.create({
  baseURL: "https://example.com/v1/",
  withCredentials: true,
  headers: {
    'Content-Type': 'application/json;charset=UTF-8',
  },
});

apiBase.defaults.headers['Content-Type'] = 'pplication/json;charset=UTF-8';
apiBase.defaults.headers['Access-Control-Allow-Origin'] = 'http://example.com';
apiBase.defaults.headers['Host'] = 'example.com';
apiBase.defaults.headers['Referer'] = 'example.com';
apiBase.defaults.headers['Accept-Encoding'] = 'gzip, deflate, br';

apiBase.post('login', {
  name: 'myuser',
  password: 'mypassword',
});

仍然返回

Access to XMLHttpRequest at 'https://example.com/v1/login' 
from origin 'http://example.com' has been blocked by CORS policy: Response 
to preflight request doesn't pass access control check: The value of the 
'Access-Control-Allow-Origin' header in the response must not be the 
wildcard '*' when the request's credentials mode is 'include'. The 
credentials mode of requests initiated by the XMLHttpRequest is controlled 
by the withCredentials attribute.

Answer 1

设置凭据或将内容类型设置为 JSON 将触发 preflight request 。

预检响应的要求比非预检请求更严格。

其中之一是，正如错误消息所示，您不能使用通配符。您必须明确指定来源。你没有这样做。

And actually, no header 'Content-Type' is added to this request.

当然。预检未获得设置它的权限，因此从未发出请求。