Cloudflare Developers•15mo ago

As per this discussion https://discord.com/channels/595317990191398933/1288002398228320328/128818858

As per this discussion IPv6 -> IPv4 it seems not

DD Trombett As per this discussion https://discord.com/channels/595317990191398933/128800239...

dave•10/20/24, 3:54 PM

thanks!

Brett Willis•10/20/24, 9:14 PM

The docs talk about being careful with global variables that are derived from environment state/variables because it is possible for the

env

env

object to change without restarting the isolate instance (see https://developers.cloudflare.com/workers/runtime-apis/bindings/#making-changes-to-bindings).
The docs also mention that the same instance of the

env

env

object (equal by reference) should last between requests as long as the configuration is unchanged (and of course so long as the isolate instance remains I assume, see https://developers.cloudflare.com/workers/runtime-apis/handlers/fetch/#parameters).
Therefore it seems like a natural recommendation to just store "global variables" on the

env

env

object, rather than globalThisglobalThis: whenever the config changes, that state will be clobbered as it should, but will otherwise live on between requests same as globalThisglobalThis.
I've been doing this for a long while now and it seemingly works great with no problems. About to go to prod.
Can anyone with knowledge of the internal workings comment if this is a bad idea or if it has any unexpected consequences?

Persephone•10/21/24, 11:39 AM

Hello anyone know how to enable cookies on cloudflare please for (all of my domain)

Persephone•10/21/24, 11:40 AM

That cookies are automatically activated on the browser without my visitors tinkering with their settings

LordSilver•10/21/24, 12:36 PM

Is HTMLRewrite an alternative to cheerio?

PPersephone Hello anyone know how to enable cookies on cloudflare please for (all of my doma...

Hello, I’m Allie!•10/21/24, 1:28 PM

Cookies generally don’t require user consent from a technical perspective, only a legal one

Hello, I’m Allie!•10/21/24, 1:28 PM

So if your server sends a

set-cookie

set-cookie

, then the cookie will be set

LLordSilver Is [HTMLRewrite](https://developers.cloudflare.com/workers/runtime-apis/html-rew...

Hello, I’m Allie!•10/21/24, 1:29 PM

Sort of? It is used in a different way, and it doesn’t support all of the selector magic that Cheerio has

HHello, I’m Allie!Sort of? It is used in a different way, and it doesn’t support all of the select...

LordSilver•10/21/24, 1:55 PM

Then why it was created?

LordSilver•10/21/24, 1:55 PM

Because Workers doesn't work with standard npm packages?

LLordSilver Then why it was created?

Hello, I’m Allie!•10/21/24, 4:11 PM

Because it is streaming. Workers may not have enough memory to hold an entire HTML DOM Tree in memory along with everything else.

HTMLRewriter

HTMLRewriter

gets around this by streaming the body through, and never storing the entire thing in memory

Hello, I’m Allie!•10/21/24, 4:11 PM

This has some drawbacks, but for simpler manipulations it should be more than enough

D TrombettOP•10/21/24, 8:38 PM

It's a mix of native implementations and polyfills

D TrombettOP•10/21/24, 8:39 PM

So if something is implemented natively you'll get best performance but if something needs a polyfill it'll be slower

ashwini_.•10/22/24, 5:16 AM

Hey, I am student. Attempting the Cloudflare Home Assignment for notification development. I am struck on invalid data validation or error handling of multiple notification. I am not sure what expectation I am missing. I don't want an direct answer I just want to know the expectations more clearly. Is there anyone here or a SPOC whom I can contact?

WillTolmie•10/22/24, 6:10 AM

What would the correct channel be for the Workers-Framework beta?

Constantin•10/22/24, 11:26 AM

having a problem with 2 workers: (1 - worker AapWorker), and another used as a service worker (2- AuthWorker).
when i set AuthWorker to use a remote KV (with preview_id, and run with wrangler dev --remote)

i'm getting this error in worker AppWorker

jazz1611•10/22/24, 12:32 PM

hello, how can i block access from *.worker.dev in my server/script ?

Jjazz1611 hello, how can i block access from *.worker.dev in my server/script ?

Cyb3r-Jak3•10/22/24, 1:22 PM

Add

workers_dev = false

workers_dev = false

to your wrangler.toml file

jazz1611•10/22/24, 1:53 PM

my server are using nginx + php, some guys use domain *.worker.dev access to my site for exploit

jazz1611•10/22/24, 2:13 PM

so i need catch cf-worker header, right ?

Erisa•10/22/24, 2:17 PM

yes, block requests with a request header named cf-worker

jazz1611•10/22/24, 2:23 PM

got it. thank you

ac•10/22/24, 7:20 PM

Is there a hard limit to the number of service bindings a worker can have? I know there is 128 env variables/worker, but wondering specifically about service bindings since there's nothing on the limits page (https://developers.cloudflare.com/workers/platform/limits/)

Cloudflare Docs

Limits | Cloudflare Workers docs

Cloudflare Workers plan and platform limits.

Advany•10/22/24, 9:41 PM

trying to deploy, but getting: binding DB of type d1 failed to generate. Please try again later or contact support. [code: 10021]

itsmatteomanf•10/22/24, 9:42 PM

we know, it's been escalated

Advany•10/22/24, 9:42 PM

using

wrangler 3.82.0

Advany•10/22/24, 9:42 PM

time for bed, you guys are fast lol

Pedagogy•10/22/24, 10:03 PM

Hey all. New to Cloudflare workers and pages. I have a static website but would like to use a worker call for a request of a large image asset stored in Cloudflare R2. What are the best security practices for workers? I am assuming the worker is deployed publicly and the link is revealed to anyone who reads or scrapes my .js file. Is the best secuirty just CORS policies in the worker itself?

AAdvany using ⛅️ wrangler 3.82.0

Walshy•10/22/24, 10:38 PM

Fixed - https://www.cloudflarestatus.com/incidents/f907j39814l7

Errors Deploying Workers with D1 Database Bindings

Enom•10/22/24, 11:37 PM

any way to bring golang to workers?

Enom•10/22/24, 11:37 PM

also how to quickly estimate costs as "Metrics" is not updating real-time for me?

Enom•10/22/24, 11:38 PM

EEnom any way to bring golang to workers?

Cyb3r-Jak3•10/23/24, 1:09 AM

You can via WASM https://github.com/syumai/workers

GitHub

GitHub - syumai/workers: Go package to run an HTTP server on Cloudf...

Go package to run an HTTP server on Cloudflare Workers. - syumai/workers

Original message was deleted

fry69•10/23/24, 9:45 AM

Please do not crosspost, it makes it hard to follow discussions -> kv

danielsundq•10/23/24, 9:53 AM

Yeah sorry, just checking if there is more response in this channel. I will delete it.

RReelMoon I Can't able to access workers from my account I Can Deploy worker but can't a...

fry69•10/23/24, 1:47 PM

Can you test/run your worker locally?

Enom•10/23/24, 2:11 PM

is there any tool that could real-time tell or output the correct cost/resource usage of the function? (CPU time)

�

😈 Donkey 💫•10/23/24, 3:46 PM

Since, I assume that RPC is faster than Fetch (?) in latency
Do you guys know how much is it faster?

Any reason else for choosing RPC over FETCH? please share your thoughts

�

😈 Donkey 💫•10/23/24, 3:48 PM

Docs didn't point out any pros using RPC: https://developers.cloudflare.com/workers/runtime-apis/rpc/

Cloudflare Docs

Remote-procedure call (RPC) | Cloudflare Workers docs

The built-in, JavaScript-native RPC system built into Workers and Durable Objects.

�😈 Donkey 💫Docs didn't point out any pros using RPC: https://developers.cloudflare.com/work...

Hello, I’m Allie!•10/23/24, 3:50 PM

I think it is mostly in the simplicity of use? You don't need to

JSON.stringify

JSON.stringify

data when you pass it around

�

😈 Donkey 💫•10/23/24, 3:51 PM

thanks, It doesn't require serialized data

�😈 Donkey 💫thanks, It doesn't require serialized data

Hello, I’m Allie!•10/23/24, 3:53 PM

The other thing too is that it might be faster because you aren't passing an entire

Request

Request

Response

Response

around

�

😈 Donkey 💫•10/23/24, 3:57 PM

since the last time I read docs, now It has pretty new things, like passing a stub/function, amazing

code.JayS•10/23/24, 8:11 PM

hey, just a quick one. is there an easy way to restrict access to my cf worker? it handles my emails (via resend) but everyone can access the provided url

As per this discussion https://discord.com/channels/595317990191398933/1288002398228320328/128818858

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