Hello.
I am attempting to use `expires` on Nginx 1.15.3 to define the expiry of
files on a per MIME type basis.
I have used [1] as a base, and constructed the following `map` in the `http`
section of a `include`-d `server` block (domain sanitised):
map $sent_http_content_type $www_example_com_expires {
default 1M;
application/atom+xml 1h;
application/javascript 1M;
application/json 0s;
application/ld+json 0s;
application/manifest+json 1w;
application/rdf+xml 1h;
application/rss+xml 1h;
application/schema+json 0s;
application/x-javascript 1M;
application/xml 0s;
font/woff 1M;
image/gif 1M;
image/jpeg 1M;
image/png 1M;
image/svg+xml 1M;
image/vnd.microsoft.icon 1M;
image/webp 1M;
image/x-icon 1M;
text/cache-manifest 0s;
text/css 1M;
text/html 0s;
text/javascript 1M;
text/x-cross-domain-policy 1w;
text/xml 0s;
video/mp4 1M;
video/webm 1M;
}
Later on, after the `map` is defined, I call it using `expires` in a
`server` block:
server {#IPv4 and IPv6, https, PHP fastcgi, check https://cipherli.st
for latest ciphers
access_log /var/log/nginx/www.example.com.access.log ipscrubbed;
add_header Access-Control-Allow-Origin "https://*.example.com";;
add_header Content-Security-Policy "default-src 'self'; connect-src
'self' https://api.github.com; font-src 'self'; img-src 'self' data: *
https://*; media-src 'self' * https://*; style-src 'self' 'unsafe-in$
add_header Expect-CT "max-age=0;
report-uri=https://example.com/expect-ct-report";;
add_header Feature-Policy "camera 'self'; geolocation 'none';
microphone 'none'; midi 'none'; payment 'none'";
add_header Referrer-Policy strict-origin;
add_header Strict-Transport-Security "max-age=15768000;
includeSubDomains; preload";
add_header X-Content-Type-Options nosniff;
add_header X-Frame-Options DENY;
add_header X-XSS-Protection "1; mode=block";
error_log /var/log/nginx/www.example.com.error.log crit;
etag off;
expires $www_example_com_expires;
index index.html index.php;
listen [::]:443 http2 ssl;
listen 443 http2 ssl;
[...]
}
My config passes the `nginx -t` self-test with no errors, and I can restart
Nginx without issue.
In the browser inspector, all MIME types are assigned a 1 month expiry, as
if they're inheriting the `default` value from the map. Example headers for
a .php file:
Date: Mon, 03 Sep 2018 20:09:30 GMT
Expires: Wed, 03 Oct 2018 20:09:30 GMT
If I remove the `expires` directive, the 'Expires:' header is not shown, so
`expires` is doing *something*.
I suspect my syntax is wrong, and I would be very grateful for any feedback
-- I am particularly interested a clue or pointer to aid my research into
why this is not working.
Thank you for your attention and interest.
[1] http://nginx.org/en/docs/http/ngx_http_headers_module.html#expires
Posted at Nginx Forum:
https://forum.nginx.org/read.php?2,281087,281087#msg-281087
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