cors.conf.template

set $request_cors "${request_method}_${CORS_ENABLED}";

if ($request_cors = "OPTIONS_1") {
    add_header 'Access-Control-Allow-Origin' '${CORS_ALLOWED_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;
    #
    # Allow/deny Private Network Access CORS requests.
    # https://developer.chrome.com/blog/private-network-access-preflight/
    #
    add_header 'Access-Control-Allow-Private-Network' '${CORS_ALLOW_PRIVATE_NETWORK_ACCESS}';

    add_header 'Content-Type' 'text/plain; charset=utf-8';
    add_header 'Content-Length' 0;
    return 204;
}

if ($request_cors = "GET_1") {
    add_header 'Access-Control-Allow-Origin' '${CORS_ALLOWED_ORIGIN}' always;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
    add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
    add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
}

if ($request_cors = "HEAD_1") {
    add_header 'Access-Control-Allow-Origin' '${CORS_ALLOWED_ORIGIN}' always;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
    add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
    add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
}