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-+++
-date = 2022-02-20
-title = "Caching Static Content with Nginx"
-description = ""
-draft = false
-+++
-
-# Update Your Nginx Config to Cache Static Files
-
-If you run a website on Nginx that serves static content (i.e., content that is
-not dynamic and changing with interactions from the user), you would likely
-benefit from caching that content on the client-side. If you're used to Apache
-and looking for the Nginx equivalent, this post should help.
-
-Luckily, setting up the cache is as easy as identifying the file types you want
-to cache and determining the expiration length. To include more file types,
-simply use the bar separator (`|`) and type the new file extension you want to
-include.
-
-```config
-server {
-    ...
-
-    location ~** .(css|js|jpg|jpeg|gif|png|ico)$ {
-        expires 30d;
-    }
-
-    ...
-}
-```
-
-I have seen some people who prefer to set `expires` as `365d` or even `max`, but
-that is only for stable, infrequently changing websites. As my site often
-changes (i.e., I'm never content with my website), I need to know that my
-readers are seeing the new content without waiting too long.
-
-So, I went ahead and set the expiration date at `30d`, which is short enough to
-refresh for readers but long enough that clients/browsers won't be re-requesting
-the static files too often, hopefully resulting in faster loading times, as
-images should be the only thing slowing down my site.
-
-# Testing Results
-
-To test my changes to the Nginx configuration, I used the [HTTP Header
-Live](https://addons.mozilla.org/en-US/firefox/addon/http-header-live/)
-extension on my Gecko browser and used the sidebar to inspect the headers of a
-recent image from my blog.
-
-In the image below, you can see that the `Cache-Control` header is now present
-and set to 2592000, which is 30 days represented in seconds (30 days \_ 24
-hours/day \_ 60 minutes/hour \*\* 60 seconds/minute = 2,592,000 seconds).
-
-The `Expires` field is now showing 22 March 2022, which is 30 days from the day
-of this post, 20 February 2022.
-
-# Caveats
-
-Remember that this caching system is **client-side**, which means that content
-is only cached for as long as a client allows it. For example, my browser purges
-all caches, data, etc. upon exit, so this caching policy will only work as long
-as my browser remains open and running.
-
-If you need to test updates to your site, you'll need to clear the cache to see
-updates for any file extension you configured. This can often be done with the
-`Shift + F5` or `Ctrl + F5` key combinations in most browsers.