+++
date    = "2025-03-13T22:42:18+00:00"
lastmod = "2025-03-13T22:42:18+00:00"
tags    = [ "gists" ]
+++

I was shown this thing called {{< abbr "SSI" "server side includes" >}}. It's
the sneakiest of tricks for primitively boosting any
{{< abbr "SSG" "static site generator" >}}. It's supported in the web servers
[`nginx`](https://nginx.org/en/docs/http/ngx_http_ssi_module.html),
[`apache`](https://httpd.apache.org/docs/current/howto/ssi.html),
[`lighttpd`](https://redmine.lighttpd.net/projects/lighttpd/wiki/Mod_ssi), and
[others](https://en.wikipedia.org/wiki/Server_Side_Includes).

```nginx { caption="The 'ssi_last_modified' is the magic option for 'nginx'. That preserves the original modification headers if you're feeling advanced." }
server {
  ssi on;
  ssi_last_modified on;
}
```