Serve static brotli compressed files on nginx without ngx_brotli

brotli-nginx-info.txt

For this to work, you need to precompress your files:

> brotli -q 11 file.css file.cssbr

The file extensions needs to end with br without any delimiter, this is to make the nginx config less cumbersome.

vhost.conf

map $http_accept_encoding $brotli_supported {
    default "";
    "~*(^|[, ])br([;, ]|$)" "br";
}

map $brotli_supported $brotli_supported_vary {
    default "";
    "br" "Accept-Encoding";
}

server {
# ...

    location ~ /*.css$ {
        # Dynamisches zippen aus, wir wollen static!
        gzip off;
        default_type text/css;
        add_header Content-Encoding $brotli_supported;
        add_header Vary $brotli_supported_vary;
        try_files $uri$brotli_supported =404;
    }


# ...
}