```js const response = await next(); response.headers.set('Cache-Control', 'no-store'); return respo

const response = await next();
response.headers.set('Cache-Control', 'no-store');
return response;

const response = await next();
response.headers.set('Cache-Control', 'no-store');
return response;

const response = await next();
response.headers.set('Cache-Control', 'no-store');
return response;

const response = await next();
response.headers.set('Cache-Control', 'no-store');
return response;

^ This code will likely work in dev, but not in prod. In dev, headers from effective

fetch

fetch

requests can be mutable, whereas in prod they're not. There's various issues to resolve this (and I think it's mostly resolved now), but for safety you may want to clone the response before mutating the headers, like this:

const response = await next();
const newResponse = response.clone();
newResponse.headers.set('Cache-Control', 'no-store');
return newResponse;

const response = await next();
const newResponse = response.clone();
newResponse.headers.set('Cache-Control', 'no-store');
return newResponse;

const response = await next();
const newResponse = response.clone();
newResponse.headers.set('Cache-Control', 'no-store');
return newResponse;

const response = await next();
const newResponse = response.clone();
newResponse.headers.set('Cache-Control', 'no-store');
return newResponse;

JamesOP•6/1/22, 2:28 AM

Lemme know if all of that gets you any further along!

JJames ```js const response = await next(); response.headers.set('Cache-Control', 'no-s...

Isaac McFadyen•6/1/22, 2:29 AM

I don't think clone works, I think you need to do new Response(response.body, response)new Response(response.body, response)?

Isaac McFadyen•6/1/22, 2:29 AM

Maybe that's just for Request though.

JamesOP•6/1/22, 2:31 AM

Clone should work afaik, but that's another great tip if it doesn't

JamesOP•6/1/22, 2:32 AM

Once https://github.com/cloudflare/miniflare/commit/1599c75c087f04fcc1a969b93588d802052cf629 lands in wrangler2 though, things should hopefully be more consistent in prod vs dev

Ggarrison Yup, replaced clone() with what was suggested above, and now it works.

JamesOP•6/1/22, 3:07 AM

Glad to hear it

amorfati•6/1/22, 6:49 AM

in the code sample in this screenshot, if we were to apply the KV in the shown KV namespace bindings, would it be:

npx wrangler pages dev dist --kv appleData

npx wrangler pages dev dist --kv appleData

npx wrangler pages dev dist --kv APPLE_DISTRIBUTION

npx wrangler pages dev dist --kv APPLE_DISTRIBUTION

then:

await env.appleData.get('APPLE_DISTRIBUTION');

await env.appleData.get('APPLE_DISTRIBUTION');

await env.APPLE_DISTRIBUTION.get('...');

await env.APPLE_DISTRIBUTION.get('...');

or something else?

Walshy•6/1/22, 9:08 AM

number 2 and number 2

Isaac McFadyen•6/1/22, 3:03 PM

@jbergstroem are you seeing the same issue with any other colos?

jbergstroem•6/1/22, 3:05 PM

So far, I've tried from 7148cf4558a76f2f-SCL7148cf4558a76f2f-SCL (boo), 7148c9e2de03ab38-EZE7148c9e2de03ab38-EZE (yay) and 7148c2165e46694b-FRA7148c2165e46694b-FRA (yay)

jbergstroem•6/1/22, 3:06 PM

We've also seen worker errors from -SCL-SCL; here's a ray id that threw a worker error (1101): 7148a5d07dc62ded7148a5d07dc62ded

Isaac McFadyen•6/1/22, 3:06 PM

CC @walshydev a _worker.js_worker.js seems to be returning an empty 200 response in certain colos only (same deployment), Ray IDs are above.

Walshy•6/1/22, 3:08 PM

what's the site?

Walshy•6/1/22, 3:08 PM

was this a custom domain or pages.dev?

Walshy•6/1/22, 3:08 PM

what's the exact response returned?

Isaac McFadyen•6/1/22, 3:09 PM

@jbergstroem ^

jbergstroem•6/1/22, 3:12 PM

So, I just did a redeployment and the pages subdomain (7148df54b9eefde9-SCL7148df54b9eefde9-SCL) is confirmed working and the custom domain wasn't. The custom domain now responds from 7148e104883a9b39-FRA7148e104883a9b39-FRA (working fine), checking with other users.

jbergstroem•6/1/22, 3:14 PM

@walshydev basically a lot of the linked assets are returning a http 200 with empty content. I'm deploying my site via sveltekit's cloudfare pages adapter which uses the _worker.js_worker.js approach.

jbergstroem•6/1/22, 3:14 PM

I occasionally saw 1101 errors as well.

Walshy•6/1/22, 3:15 PM

1101 is a Worker error

Walshy•6/1/22, 3:15 PM

It wouldn't surprise me if this was just an issue with the Function itself

Walshy•6/1/22, 3:15 PM

I'd recommend getting some logging and seeing what turns up

jbergstroem•6/1/22, 3:16 PM

Yep; just saying that I got inconsistent response from different datacenters.

jbergstroem•6/1/22, 3:16 PM

As far as logging goes, you mean that I should deploy it as a worker instead?

Walshy•6/1/22, 3:16 PM

No, you should setup something like Sentry or an alternative

jbergstroem•6/1/22, 3:17 PM

We do have that, I can't say I ahve seen anything that seems to fire around the same time though

Walshy•6/1/22, 3:17 PM

As for the responses, it sounds like this is different users rather than just different colos. So, the change is quite a lot more. There can just be logic misfiring for that user

Walshy•6/1/22, 3:17 PM

Without the domain though, I can't do much other than suggest

jbergstroem•6/1/22, 3:17 PM

Yes, so I tried incognito, different devices for the same user, session or no session

jbergstroem•6/1/22, 3:19 PM

happy to share account info; should I do it here?

Walshy•6/1/22, 3:19 PM

here works, if I can get the domain I can send a request from SLC and see what's happening in more detail

jbergstroem•6/1/22, 3:22 PM

The request https://emmacares.app/_app/immutable/assets/pages/__layout.svelte-60c8b0a5.csshttps://emmacares.app/_app/immutable/assets/pages/__layout.svelte-60c8b0a5.css through the ray 7148f02489766f25-SCL7148f02489766f25-SCL returns 200200 with an empty body.

jbergstroem•6/1/22, 3:25 PM

https://emmacares.app/_app/immutable/assets/Carousel-78dd9c0c.csshttps://emmacares.app/_app/immutable/assets/Carousel-78dd9c0c.css through 7148f1a3dbebbac0-SCL7148f1a3dbebbac0-SCL returns 200200 with content.

Stefatorus•6/1/22, 3:32 PM

Hi, can pages functions do unbound?

Walshy•6/1/22, 3:33 PM

Not yet, hopefully soon

jbergstroem•6/1/22, 3:34 PM

Just noticed https://github.com/sveltejs/kit/issues/3728 but im not sure if the use case covers me. Will update and review. Strange part is that my staging env never showed any error.

Walshy•6/1/22, 3:44 PM

Ok can repro no data coming back from SLC, gonna dig in a bit

Isaac McFadyen•6/1/22, 4:35 PM

That's related to the fact that Functions are not the same as Node.JS and so don't have access to Buffer.

Isaac McFadyen•6/1/22, 4:36 PM

Yeah, but Chakra does internally.

Isaac McFadyen•6/1/22, 4:36 PM

There might be a way to polyfill it?

```js const response = await next(); response.headers.set('Cache-Control', 'no-store'); return respo

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