nginx cors

    location / {

    set $cors '';
    add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since, xsrfcookiename, xsrfheadername,X-Forwarded-For';

    proxy_pass http://someupstreamserver;
    include uwsgi_params;
    proxy_set_header X-Forwarded-Proto  https;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Scheme $scheme;
    proxy_read_timeout 800s;
    proxy_connect_timeout 800s;
    proxy_set_header Connection '';
    proxy_http_version 1.1;
    chunked_transfer_encoding off;
    proxy_buffering off;
    proxy_cache off;
    proxy_redirect off;
    proxy_set_header Host $http_host;
    }

}