https://github.com/mastondzn/cdn/blob/main/src/routes/images.ts this is everything that happens on t

https://github.com/mastondzn/cdn/blob/main/src/routes/images.ts this is everything that happens on this route note the header is x-cache-status not cf-cache-status

GitHub

cdn/src/routes/images.ts at main · mastondzn/cdn

Personal image/file uploader, built with Cloudflare Workers & R2. To be used mainly with ShareX. - mastondzn/cdn

MastonOP•11/22/23, 1:41 AM

this is a worker route

MastonOP•11/22/23, 1:41 AM

you can see the header right

Unsmart•11/22/23, 1:41 AM

That code is adding the header x-cache-status.

MastonOP•11/22/23, 1:41 AM

MastonOP•11/22/23, 1:42 AM

yeah i see that which is intended

MastonOP•11/22/23, 1:42 AM

but the cf-cache-status also appears

MastonOP•11/22/23, 1:42 AM

which is what i find odd

Unsmart•11/22/23, 1:43 AM

It might be automatically added by the cache api since you are using that

MMaston https://github.com/mastondzn/cdn/blob/main/src/routes/images.ts this is everythi...

Erisa•11/22/23, 1:45 AM

If you return a response directly from the cache api then its going to give cf-cache-status: HITcf-cache-status: HIT

MastonOP•11/22/23, 1:46 AM

ohh okay that makes sense

Erisa•11/22/23, 1:46 AM

But if theres nothing in there then youre not going to get a MISS because Workers doesn't know what you intended, so it will just have no header

Erisa•11/22/23, 1:47 AM

Adding your own header is smart if you want to be sure whats happening, then you can add your own extra states as well if you find a need to

Erisa•11/22/23, 1:47 AM

Since you cant modify

cf-

cf-

headers

MastonOP•11/22/23, 1:48 AM

okay thanks that makes sense actually

MastonOP•11/22/23, 1:49 AM

and also i wanna say i was using wrangler before v3 and now this is way better dx with the local dev mode great work guys

EErisa Since you cant modify `cf-` headers

Chaika•11/22/23, 2:20 AM

minor but you can return your own cf-cache-status header from a worker, probably not a good idea, but I mean if you wanted to, could fake a miss

Erisa•11/22/23, 2:21 AM

Fun, okay then

Unsmart•11/22/23, 2:23 AM

Yeah workers can add cf-<anything> just the rules stuff cant. or at the very least a few of the cf-<things> I tried worked

Chaika•11/22/23, 2:24 AM

can't override cf-ray but lots of other things you can fake

MastonOP•11/22/23, 3:16 AM

this cache api is actually nice you can upload stuff and instantly insert in your cache aswell so even the first request can be cached, very cool

Ottomated•11/22/23, 4:16 AM

Does anyone have recommendations for a rate limiting library backed by D1 or KV?

Unsmart•11/22/23, 4:21 AM

KV shouldnt really be used for rate limiting as theres a limit to writes on the same key to 1 per second. Not aware of any rate limiting libraries with D1 though, only rate limiter I am really aware of is this repo with the code for making one with durable objects: https://github.com/honzabit/durable-limiter

Unsmart•11/22/23, 4:23 AM

Of course would highly recommend using cloudflare waf rate limiting rules if you can (they are free and unmetered now they used to be paid)

quambo•11/23/23, 12:56 PM

Quick question around durable objects and setAlarm. Since Date.now() will only return the time of the last IO, the below example may set the alarm to a past time. Is this correct? Is the alarm still guaranteed to execute in that case?

  async alarm() {
    // Perform something that could take up to 15 seconds
    await doSomething();
    // Schedule task for the next second
    this.state.storage.setAlarm(Date.now() + parseDuration('1s'));
  }

  async alarm() {
    // Perform something that could take up to 15 seconds
    await doSomething();
    // Schedule task for the next second
    this.state.storage.setAlarm(Date.now() + parseDuration('1s'));
  }

Qquambo Quick question around durable objects and setAlarm. Since Date.now() will only r...

DaniFoldi•11/23/23, 1:02 PM

Your observation is correct, fortunately the documentation says that setting an alarm for a past date triggers immediately

DaniFoldi•11/23/23, 1:08 PM

Aha, found the docs: https://developers.cloudflare.com/durable-objects/api/transactional-storage-api/

If setAlarm() is called with a time equal to or before Date.now(), the alarm will be scheduled for asynchronous execution in the immediate future. If the alarm handler is currently executing in this case, it will not be canceled. Alarms can be set to millisecond granularity and will usually execute within a few milliseconds after the set time, but can be delayed by up to a minute due to maintenance or failures while failover takes place.

Transactional Storage · Cloudflare Durable Objects docs

The Transactional Storage API allows you to achieve consistent key-value storage.

Elodere•11/23/23, 1:51 PM

So is it still safe (from spoofing) to use MailChannels pages plugin so long as you have SPF, DKIM, and DMARC setup properly?

DDaniFoldi Aha, found the docs: https://developers.cloudflare.com/durable-objects/api/trans...

quambo•11/23/23, 1:54 PM

thank you so much for pointing this out, didn't see this part! Great to know

Elodere•11/23/23, 2:02 PM

How do I pass a template to the mailchannels pages plugin? Is that possible? I see that it has a

content

content

property, but I don't understand why it's an array.

Pprender is that usual? installed squash, instantly getting this

Cyb3r-Jak3•11/23/23, 2:22 PM

Never used it but what does your code look like?

Pprender i just want to resize some images in cf workers ...

Hello, I’m Allie!•11/23/23, 2:30 PM

https://developers.cloudflare.com/images/image-resizing/resize-with-workers/

Resize with Cloudflare Workers · Cloudflare Image Optimization docs

Using Image Resizing with Workers gives you powerful programmatic control over every image request.

Hhylobatidae is it possible to have a worker on a .pages.dev domain? it's within my account/z...

Hello, I’m Allie!•11/23/23, 7:09 PM

Theoretically, yes

Hello, I’m Allie!•11/23/23, 7:09 PM

Wait

Hello, I’m Allie!•11/23/23, 7:09 PM

Maybe

Hello, I’m Allie!•11/23/23, 7:09 PM

I think this is a try it and see moment

Cyb3r-Jak3•11/23/23, 7:20 PM

It would be very janky and not officially supported so probably isn’t worth the trouble.

kian•11/23/23, 7:24 PM

I'm pretty sure putting a Worker on top of pages.dev bricks it until you do another Pages deployment

async alarm() { // Perform something that could take up to 15 seconds await doSomething(); // Schedule task for the next second this.state.storage.setAlarm(Date.now() + parseDuration('1s')); }

https://github.com/mastondzn/cdn/blob/main/src/routes/images.ts this is everything that happens on t

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