Cloudflare Developers•3y ago

a worker can indeed be a service binding for itself

EErisa a worker can indeed be a service binding for itself

λ.ςζ•7/1/23, 12:07 AM

i had trouble in wrangler v3 locally

MetalGear•7/1/23, 2:23 AM

I am mostly self taught and unfortunetely dont learn much at work. Can someone help me clear some confusion. In cloudflare workers I often times find myself in situation where the easiest approach would be having a array of 100 objects representing an ecommerce order. Is it a acceptable solution to just iterate through those 100 objects to find the ones that have key === something? Like I always run from that solution because I think looping through each elelment in the array is just a very bad solution. It feels that way atleast

MetalGear•7/1/23, 2:24 AM

Also whats a general number in elements in an array where a good engineer would say yeah thats too much we should look at another approach

MMetalGear I am mostly self taught and unfortunetely dont learn much at work. Can someone h...

Cyb3r-Jak3•7/1/23, 3:05 AM

Is a reason that you aren't using an object to look up the ecommerce order?
If you already have the key something like

{
  "key1": {<order info},
  "key2": {<order info},
}

{
  "key1": {<order info},
  "key2": {<order info},
}

rather then what I believe you are using which is

[
  {"key": 1, <order info>},
  {"key": 2, <order info>}
]

[
  {"key": 1, <order info>},
  {"key": 2, <order info>}
]

Gamengineer314•7/1/23, 10:04 AM

(Sorry I posted it in the wrong channel before

)
Hello!
Is there a way to know how much CPU time a request took?
I found it for cron events but not for normal requests.

phoenix•7/1/23, 10:30 AM

guys can anyone tell whether setting up custom domain in cloudflare is free for my hugo website?

Pphoenix guys can anyone tell whether setting up custom domain in cloudflare is free for ...

sathoro•7/1/23, 2:09 PM

not relevant

CCyb3r-Jak3 Is a reason that you aren't using an object to look up the ecommerce order? If y...

MetalGear•7/1/23, 5:31 PM

The thing is I’m calling an api that for example gives me all the orders that need to be shipped out today. Then I need to filter through which ones would be for a specific department or something and that’s where I’d loop through the array.

MMetalGear The thing is I’m calling an api that for example gives me all the orders that ne...

Cyb3r-Jak3•7/1/23, 5:34 PM

Ah then looping through the array is going to be your best bet

CCyb3r-Jak3 Ah then looping through the array is going to be your best bet

MetalGear•7/1/23, 5:45 PM

Yeah my question is how many elements is too much where I need to rethink my strategy

MetalGear•7/1/23, 5:45 PM

Like I literally have no idea if it’s 100 or 10,000 or 100,000 lol. Just trying to get an idea

amorfati•7/2/23, 1:33 AM

is calling a worker from another worker not possible? I'm using fetch to call worker A from worker B

Aamorfati is calling a worker from another worker not possible? I'm using fetch to call wo...

Unsmart•7/2/23, 1:34 AM

You should use service bindings

Unsmart•7/2/23, 1:34 AM

https://developers.cloudflare.com/workers/platform/bindings/about-service-bindings/

About Service bindings · Cloudflare Workers docs

Service bindings are an API that facilitate Worker-to-Worker communication via explicit bindings defined in your configuration.

UUnsmart https://developers.cloudflare.com/workers/platform/bindings/about-service-bindin...

amorfati•7/2/23, 1:55 AM

awesome, thank you!

If worker B is a web framework (

Hono

Hono

) and I usually interact with it by calling it with

https://worker_b.me.workers.dev/${param}

https://worker_b.me.workers.dev/${param}

I bind it as a service in worker A (

env.B

env.B

), how do I call it and pass

param

param

const result = await env.B.fetch(param)
const json = await result.json()

const result = await env.B.fetch(param)
const json = await result.json()

Cannot read properties of undefined (reading 'fetch')

Cannot read properties of undefined (reading 'fetch')

Aamorfati awesome, thank you! If worker B is a web framework (`Hono`) and I usually inter...

amorfati•7/2/23, 1:59 AM

worked when I passed the whole worker URL

env.B.fetch(https://worker_b.me.workers.dev/${param})

env.B.fetch(https://worker_b.me.workers.dev/${param})

amorfati•7/2/23, 1:59 AM

thank you very much @Unsmart | Tech debt

Hyper•7/2/23, 5:46 AM

Hey guys. We have been looking at workers for a while and have been interested in migrating our backend to workers. I have a couple concerns though which I needed some guidance with. For starters, our backend right now is a complex express app with many routes, middleware, controllers etc. I have looked at Hono and have liked what they have to offer, so im sure we'll be fine in terms of refactoring our app to use Hono instead of express. My main concern though is that we use libraries such as @sendgrid/mail, @aws-sdk/client-s3, mongoose, speakeasy, sharp, multer-s3, firebase-admin, just to name a few. I'm aware that workers doesnt support a full node.js environment yet. Do you guys think it will be possible to migrate to workers?

HHyper Hey guys. We have been looking at workers for a while and have been interested i...

Hello, I’m Allie!•7/2/23, 5:54 AM

It definitely won’t be a one-click migration(and some of the libraries may have to be rewritten from scratch), but I don’t see anything that would prevent it at the moment

LLekensteyn I also wondered how this worked. Perhaps it must be a valid looking domain. Both...

sathoro•7/2/23, 9:53 AM

yeah to be on the safe side I used a fake path on our real domain

LLekensteyn I also wondered how this worked. Perhaps it must be a valid looking domain. Both...

dave•7/2/23, 2:45 PM

It’s 100% working for me with the invalid domain. Could you try using a custom cache key?

dave•7/2/23, 2:48 PM

I’ll check again to see if I’m overlooking something.

LLekensteyn Invalid with a period or without? `cache.invalid` as hostname worked for me, `ca...

dave•7/2/23, 2:55 PM

I’m using with a period.

async function createCacheUrl(path: string, safe_formdata: FormData): Promise<URL> {
    const byter = await getFormHash(safe_formdata);

    const cacheUrl = new URL('https://ai.moda.invalid');

    cacheUrl.pathname = path + '/' + byter;

    return cacheUrl;
}

async function createCacheUrl(path: string, safe_formdata: FormData): Promise<URL> {
    const byter = await getFormHash(safe_formdata);

    const cacheUrl = new URL('https://ai.moda.invalid');

    cacheUrl.pathname = path + '/' + byter;

    return cacheUrl;
}

dave•7/2/23, 2:56 PM

Ah I see I already shared this, my bad.

LLekensteyn Invalid with a period or without? `cache.invalid` as hostname worked for me, `ca...

dave•7/2/23, 2:57 PM

That sorta makes sense, wouldn’t be surprised if there’s some very light URL validation being done before caching a URL.

dave•7/2/23, 3:57 PM

@lekensteyn have you looked into how purging the Cache API globally (for a single URL) works with a fake domain name?

dave•7/2/23, 9:28 PM

Is the Cache API shared among all Workers in a zone?

ErisaOP•7/2/23, 9:44 PM

yes

dave•7/2/23, 9:51 PM

ooo thank you, was about to hit myself in the face with that one

docy•7/3/23, 12:40 AM

thoughts on itty vs hono? hono claims to be 2x faster

Unsmart•7/3/23, 12:42 AM

Most people here use hono afaik but both are good and will probably be exactly the same performance wise on workers

docy•7/3/23, 12:43 AM

thanks

EErisa yes

dave•7/3/23, 3:38 AM

is awaiting on

cache.delete()

cache.delete()

a guarantee that the cached item will be gone from the local data center?

Unsmart•7/3/23, 3:39 AM

Pretty sure it will throw if it fails so yes

Kkian There isn't in Miniflare 3, yet

Shirokawa•7/3/23, 5:45 AM

Thanks a lot! What is the relationship between miniflare and Wrangler by the way? Being new to Cloudflare Workers this has been somewhat confusing to me.

Hyper•7/3/23, 6:47 AM

Hey all. What would be the best way to initialize connections to external services, i.e in my example to MongoDB, when using Hono with workers? Right now, the only way ive been able to do it (using the module worker mode) is by creating custom middleware that initializes a realm app, logs in, and connects to the DB before every request that needs to interact with the DB. Idk how practical this approach is though. Any ideas?

Hyper•7/3/23, 6:48 AM

Ideally, I would like to connect to the database once and then listen for requests

Original message was deleted

Shirokawa•7/3/23, 7:50 AM

Cool! Thanks a lot for the clarification!:)

EErisa yes

dave•7/3/23, 9:22 AM

@lekensteyn thank you both for your advice, here's what I got working to purge the Worker cache both locally and globally for a URL.

https://gist.github.com/Manouchehri/8db5ebcecbbc6b286ef226cb57122b1d

I'm using

https://ai.moda.invalid/hash_here

https://ai.moda.invalid/hash_here

as my URL, I can confirm it's working (only when using a custom domain though afaik, not

.workers.dev

.workers.dev

as expected).

dave•7/3/23, 9:35 AM

I'm not entirely sure if the

cache.delete(cacheKey)

cache.delete(cacheKey)

is actually needed, or if

purge_cache

purge_cache

will always have cleared the local cache just as fast.

ErisaOP•7/3/23, 9:53 AM

It wouldnt be immediate, the global cache purge can take a number of seconds to go through

divby0•7/3/23, 10:04 AM

I have a worker that reverse-proxies a blog on a subdirectory. It works perfect on the worker preview url, but it redirects to the origin blog instead of proxying it when I use my custom domain.

I am very sure I am just missing a little detail on how workers work.

divby0•7/3/23, 10:04 AM

I have the worker code and detailed explanation in the #workers-help (currently the topmost question) if that's needed

Ashley•7/3/23, 10:58 AM

To deploy a worker using Terraform, is the only module that works https://registry.terraform.io/providers/cloudflare/cloudflare/latest/docs/resources/worker_script?

I'm asking as script seems a bit... misleading / odd, as modern workers often have several files, not just one "script". Anything else in TF modules doesn't look suitable though, so am I missing something, or is it just not possible with TF and we have to use Wrangler, for example?

Terraform Registry

NaveenSingh900•7/3/23, 11:04 AM

Hey I am not able to "create service" button like this

Screenshot_2023-07-03-16-33-27-352_com.android.chrome.jpg

a worker can indeed be a service binding for itself

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