Axios.create 和 CORS

Question

我正在使用 axios 向端点发出包含数据的帖子请求：这有效：import axios from 'axios';axios.post('https://example.com/v1/login', {  name: 'myuser',  password: 'mypassword',});但事实并非如此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，没有向此请求添加标头。'Content-Type'有谁知道这里出了什么问题？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',});它仍然返回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 将触发预检请求。

对预检的响应的要求比对非预检请求的要求更严格。

其中之一是，正如错误消息所说，您不能使用通配符。您必须显式指定原点。你没有那样做。

实际上，没有向此请求添加标头“内容类型”。

自然。印前检查未获得设置它的权限，因此从未发出请求。

Answer 2

无论出于何种原因，Axios 都不允许在将 withCredentials 设置为 true 时以 JSON 对象的形式在 POST 请求中发送数据。在传递数据之前，您需要将数据字符串化。