[Nginx] 一文看懂Nginx如何配置跨域，值得收藏

location / {  
 add_header Access-Control-Allow-Origin *; 
 add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS'; 
 add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization'; 
  
 if ($request_method = 'OPTIONS') { 
 return 204; 
 } 
}

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

Content-Type is not allowed by Access-Control-Allow-Headers in preflight response.

application/x-www-form-urlencodedmultipart/form-datatext/plain

OPTIONS /api/test HTTP/1.1
Origin: <a href="http://foo.example" target="_blank">http://foo.example</a>
Access-Control-Request-Method: POST
Access-Control-Request-Headers: Content-Type
...

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