Habilitar CORS en NGINX – Magento

En muchas ocasiones es necesario tener habilitado CORS en nuestro servidor con el fin de despachar correctamente algunas url’s:
1. Agregamos un archivo de configuración:

sudo vim /etc/nginx/cors.conf

2. Ponemos el siguiente contenido:

if ($request_method = 'OPTIONS') {
 add_header 'Access-Control-Allow-Origin' '*';
 add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
 #
 # Custom headers and headers various browsers *should* be OK with but aren't
 #
 add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
 #
 # Tell client that this pre-flight info is valid for 20 days
 #
 add_header 'Access-Control-Max-Age' 1728000;
 add_header 'Content-Type' 'text/plain; charset=utf-8';
 add_header 'Content-Length' 0;
 return 204;
 }
 if ($request_method = 'POST') {
 add_header 'Access-Control-Allow-Origin' '*';
 add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
 add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
 add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
 }
 if ($request_method = 'GET') {
 add_header 'Access-Control-Allow-Origin' '*';
 add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
 add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
 add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
 }

3. Incluímos la configuracioń en nuestro “vhost” de nuestro sitio en Magento, preferentemente en el bloque del php

location ~ \.php$ {
     #Agregamos esta línea
     include cors-options.conf;
}

4. Reiniciamos nuestro servidor y listo.

sudo service nginx restart