Those who often read this blog already know that we're deeply in love with NGINX, a lightweight, high-performance and open-source web server and reverse proxy used by more than 358 million websites and over 66% of the world’s top 10,000 websites. And no, we're not taking money from them to say this, we just happen to like it a lot.
Anyway, in this post I'll briefly share the CORS configuration I'm using for the web sites that need to perform Cross Request Resource Sharing activities of any kind - such as using web-fonts from a subdomain on a main domain, or something like that:
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location / { if ($request_method = 'OPTIONS') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; add_header 'Access-Control-Max-Age' 1728000; add_header 'Content-Type' 'text/plain charset=UTF-8'; add_header 'Content-Length' 0; return 204; } if ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; } } |
Since it's a pretty long piece of code, you might want to put this on a separate file (such as /etc/nginx/cors-settings.conf ) and then include it with the following one-liner:
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include /etc/nginx/cors-settings.conf; |
Pretty neat, isn't it?
If you're looking for further info about how to set & configure other NGINX security headers, such as X-Frame-Options, HTTP Strict Transport Security (HSTS), X-XSS-Protection, X-Content-Type-Options, Content Security Policy and Referrer Policy, be sure to check our NGINX HTTP Security Headers guide.
