How does Nginx implement AJAX cross-origin requests?

Cross-origin occurs when AJAX requests from one domain to another. So how can I implement ajax cross-origin requests on nginx? To enable cross-origin requests on nginx, add the add_header Access-Control * command. As follows:

Location /{
Add_header 'access-Control-Allow-origin' 'http: // other.subdomain.com ';
Add_header 'access-Control-Allow-Credentials ''true ';
Add_header 'access-Control-Allow-Methods ''' GET ';
 
...
...
The rest of your configuration here
...
...
 
}

Note:

First Command: authorize requests from other.subdomain.com

Second command: when the flag is true, the response is to whether the request can be exposed.

The third day Command: specifies the request method, which can be GET or POST.

If you want to allow access from any domain, you can configure it as follows:

Access-Control-Allow-Origin :*

Restart nginx

Service nginx reload

Ajax cross-origin request test

When the request is successful, the response header is as follows:
View source
Print?
HTTP/1.1 200 OK
Server: nginx
Access-Control-Allow-Origin: other.subdomain.com