@chientrm have you tried setting cache directives? https://developer.mozilla.org/en-US/docs/Web/HTTP

@chientrm have you tried setting cache directives? https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control

Cache-Control - HTTP | MDN

The Cache-Control HTTP header field holds directives (instructions) — in both requests and responses — that control caching in browsers and shared caches (e.g. Proxies, CDNs).

Aandrewp @chientrm have you tried setting cache directives? https://developer.mozilla.org...

chientrm.com•8/11/23, 3:56 PM

I made it to decode and serve the value as an image.
Just not sure how to get the cache done right.

chientrm.com•8/11/23, 3:56 PM

TTL cache-control is not good imho.

Lleostera @chientrm can you store the raw binary image on r2 instead? that + a public doma...

chientrm.com•8/11/23, 3:57 PM

The image is preprocessed and encoded as base64 when first import.
Also the size is guaranteed to be < 25MB and KV is already available in my app.

Cchientrm.com TTL cache-control is not good imho.

Unsmart•8/11/23, 3:58 PM

why not

UUnsmart <:meowwaitwhat:356860875795202050> why not

chientrm.com•8/11/23, 3:58 PM

Maybe calculate a hash and then throw redirect and set the cache to forever?

Unsmart•8/11/23, 3:59 PM

I'm very confused... I would just set a cache control header

UUnsmart I'm very confused... I would just set a cache control header 🤷

chientrm.com•8/11/23, 4:00 PM

using time-out?

Unsmart•8/11/23, 4:00 PM

Im not sure what time outs have to do with a header?

chientrm.com•8/11/23, 4:00 PM

because, the images are serve at /images/[id]/images/[id]. There was no hash pre-calculated.

UUnsmart Im not sure what time outs have to do with a header?

chientrm.com•8/11/23, 4:02 PM

what should the cache header look like?

Cchientrm.com what should the cache header look like? 🤔

andrewpOP•8/11/23, 6:35 PM

This document is a great overview of the different caching options: https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching . The caching headers that you decide use will vary based on your application's use cases. I encourage you to read through the options and test out a few of them, to see what works best.

HTTP caching - HTTP | MDN

The HTTP cache stores a response associated with a request and reuses the stored response for subsequent requests.

James•8/14/23, 1:01 AM

Read heavy workloads. Storing assets is a great example

James•8/14/23, 1:02 AM

It’s also just fine for storing stuff you don’t mind taking 60 seconds to be invalidated. Caches is another great example

James•8/14/23, 1:08 AM

KV is much faster than R2: https://developers.cloudflare.com/workers/learning/how-kv-works/

How KV works · Cloudflare Workers docs

Workers KV is a global, low-latency, key-value data store. It stores data in a small number of centralized data centers, then caches that data in …

James•8/14/23, 1:09 AM

Data is cached in local datacenters after being retrieved once

James•8/14/23, 1:09 AM

Whereas R2 is always in a single location

James•8/14/23, 1:09 AM

KV is also cheaper IIRC

Erisa•8/14/23, 1:10 AM

Nah, R2 is slower but cheaper

James•8/14/23, 1:10 AM

Ahh fair, thanks for clarification

James•8/14/23, 1:12 AM

I love the simplicity of KV for storing things like assets, and caches personally. Those things might not change for days, weeks, or months, so I just don’t need strong consistency.

James•8/14/23, 1:16 AM

You can’t put CDN cache in front of a worker. You could use workers cache api but that’s still gonna incur a cold read to R2 which’ll be slower than KV

James•8/14/23, 1:18 AM

Sure if you’re just doing that then R2 makes more sense

James•8/14/23, 1:19 AM

Real world example with heavy KV usage; https://playerdb.co

We query dynamically from various APIs and read/write to KV for caching results.

PlayerDB

PlayerDB is a JSON powered player fetching and caching service. Lookup player names and IDs for Minecraft, Steam, and Xbox accounts.

Erisa•8/14/23, 1:24 AM

Cloudflare Pages is also using KV to serve assets quickly

NNeves Looking at the api `https://playerdb.co/api/player/minecraft/$ID` does it return...

James•8/14/23, 1:24 AM

Pretty much yep

James•8/14/23, 1:28 AM

Cache api is datacenter specific (more or less), and prone to being evicted. KV is a permanent store, and globally available

NNeves Does the value stored in the kv need to be updated sometime in the future or it'...

James•8/14/23, 1:33 AM

In this api, it doesn’t change often. And if it does, it’s something like an avatar which is okay to be a little out of date. We arbitrarily set keys to expire after 7 days if I recall

James•8/14/23, 1:42 AM

My understanding is within 60 seconds, yes

Erisa•8/14/23, 1:43 AM

Also assuming you hadn't previously tried to access that key and had the 404 cached

Erisa•8/14/23, 1:47 AM

Correct

Erisa•8/14/23, 2:07 AM

At the moment it is

James•8/14/23, 2:41 AM

Not directly, no. You'd have to list, read, and then write keys into your new KV namespace.

@chientrm have you tried setting cache directives? https://developer.mozilla.org/en-US/docs/Web/HTTP

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