ThomasLau/CORS_on_nginx.md

## CORS_on_nginx.md

      
    Raw
  

              CORS_on_nginx.md
            
          
    The following Nginx configuration enables CORS, with support for preflight requests, using a regular expression to define a whitelist of allowed origins, and various default values that may be needed to workaround incorrect browser implementations.
map $http_origin $cors_header {
    default "";
    "~^https?://[^/]+\.example\.com(:[0-9]+)?$" "$http_origin";
}

server {
    ...
    location / {
        add_header Access-Control-Allow-Origin $cors_header;
        try_files $uri $uri/ /index.php;
    }
    ...
 }