markdown 跨域服务端响应头设置

Posted 2021-05-05

## 服务器设置跨域
```javascript
 // 第二个参数填写允许跨域的域名称，不建议直接写 "*"
response.setHeader("Access-Control-Allow-Origin", "http://m.juejin.com/"); 
// 说明这是ajax请求
response.setHeader("Access-Control-Allow-Headers", "X-Requested-With");
response.setHeader("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");

// 接收跨域的cookie
response.setHeader("Access-Control-Allow-Credentials", "true");
```