错误：请求的资源上没有“Access-Control-Allow-Origin”标头。（NGINX）

Question

我正在使用 NGINX 并在浏览器的控制台中收到该错误。

我非常沮丧。

根据我老板的说法，我需要设置 cors，我按照他的做法做了，但仍然出现同样的错误。

这是完整的错误

OPTIONS https://backend.just4bettors.mobi/auth/login XMLHttpRequest cannot load https://backend.just4bettors.mobi/auth/login. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://www.just4bettors.mobi' is therefore not allowed access. The response had HTTP status code 400.

这是配置

map $http_origin $cors_header {
    default "";
    "~^https?://[^/]+\.just4bettors\.mobi(:[0-9]+)?$" "$http_origin";

}

server {
    large_client_header_buffers 1 1K;

    listen 80;
    listen 443 ssl;

    server_name  www.just4bettors.mobi  just4bettors.mobi;
    root   /home/c0pt/capilleira/capilleiraclickandgamblemobile/www;

    ssl_certificate      /etc/ssl/certs/just4bettors.mobi.chained.crt;
    ssl_certificate_key  /etc/ssl/private/just4bettors.mobi.key;

    ssl_session_cache    shared:SSL:1m;
    ssl_session_timeout  5m;

    ssl_ciphers  HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers  on;

    location / {
        add_header Access-Control-Allow-Origin $cors_header;
    ...
    }
}



server {
    listen 80;
    listen 443 ssl;

    server_name  backend.just4bettors.mobi  www.backend.just4bettors.mobi;

    ssl_certificate      /etc/ssl/certs/just4bettors.mobi.chained.crt;
    ssl_certificate_key  /etc/ssl/private/just4bettors.mobi.key;

    ssl_session_cache    shared:SSL:1m;
    ssl_session_timeout  5m;

    ssl_ciphers  HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers  on;

    location / {
       add_header Access-Control-Allow-Origin $cors_header;
    }
}

我有域和子域，它就像名为跨域的东西。

我哪里出错了？我的意思是，我已经设置好了一切，但仍然询问我Access-Control-Allow-Origin，为什么？

ps:想哭。