express跨域问题

Question

自己创建了一个express项目，连接了远端mysql，写了接口，使用浏览器地址访问能成功并取到数据。

使用vue全家桶构建了前端项目，axios处理请求，跨域。

Request header field timestamp is not allowed by Access-Control-Allow-Headers in preflight response.

添加了以下代码，仍然没有效果：

res.header("Content-Type", "text/plain");
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");

是不是我axios请求header需要设置什么？

Answer 1

Request header field timestamp is not allowed by Access-Control-Allow-Headers in preflight response.

res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, timestamp ");

Answer 2

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