Cache-Control on static files

[pikanezi]

Hi,

Would it be possible to set a Cache-Control header for the static files? Also, do you know if it would work with Deno Deploy?

Thanks

[dbushell]

Yes this can work on Deno Deploy the example is doing so:
https://sveltekit-adapter-deno.deno.dev/

Deno Deploy has a lot of weird support conditions so it just depends what packages and APIs you're using. From my experience it is slow and not a good hosting platform for websites.

Cache-Control headers are set for the immutable SvelteKit static files:

sveltekit-adapter-deno/files/mod.ts

Lines 58 to 61 in 12022ab

	response.headers.set(
	'cache-control',
	'public, max-age=31536000, immutable'
	);

For custom static files it would be too opinionated to add addtional headers.

I don't think other SvelteKit adapters provide an option. The node adapter suggestions making a custom server. You could do that for sveltekit-adapter-deno by copying build/mod.ts.

You could also proxy the server and at headers at a higher level. Cloudflare Workers would be one way to achieve this.

[pikanezi]

Thanks for the quick answer. It seems svelte does not handle static caching at all so its an issue every adapter faces. I might do further research on this subject and try something of my own.

As for Deno Deploy, We're using it to host a static pre-rendered website and for this use case its fast enough so I wanted to improve its performance even more by providing caching.

Anyway, thank you again 😄