I'm trying to create a worker to use as a service binding following the instruction in the recent bl

I'm trying to create a worker to use as a service binding following the instruction in the recent blog post

javascript native RPC

javascript native RPC

javascript native RPC

javascript native RPC but the worker fails immediately with the warning:

The entrypoint src/worker.js has exports like an ES Module, but hasn't defined a default export like a module worker normally would.

The entrypoint src/worker.js has exports like an ES Module, but hasn't defined a default export like a module worker normally would.

The entrypoint src/worker.js has exports like an ES Module, but hasn't defined a default export like a module worker normally would.

The entrypoint src/worker.js has exports like an ES Module, but hasn't defined a default export like a module worker normally would.

This is promptly followed by the error:

Uncaught Error: Dynamic require of "cloudflare:workers" is not supported\n

Uncaught Error: Dynamic require of "cloudflare:workers" is not supported\n

Uncaught Error: Dynamic require of "cloudflare:workers" is not supported\n

Uncaught Error: Dynamic require of "cloudflare:workers" is not supported\n

blog post link:
https://blog.cloudflare.com/javascript-native-rpc

How to fix?

The Cloudflare Blog

We've added JavaScript-native RPC to Cloudflare Workers

Cloudflare Workers now features a built-in RPC (Remote Procedure Call) system for use in Worker-to-Worker and Worker-to-Durable Object communication, with absolutely minimal boilerplate. We've designed an RPC system so expressive that calling a remote service can feel like using a library.

BblindChicken I'm trying to create a worker to use as a service binding following the instruct...

Hello, I’m Allie!•5/8/24, 8:54 PM

What's your compatibility_datecompatibility_date?

blindChickenOP•5/8/24, 8:54 PM

compatibility_date = "2024-05-07"

compatibility_date = "2024-05-07"

BblindChicken ```compatibility_date = "2024-05-07"```

Hello, I’m Allie!•5/8/24, 8:55 PM

Do you have a repo?

blindChickenOP•5/8/24, 8:55 PM

No but I can post code, it's only a few lines a this point.

BblindChicken No but I can post code, it's only a few lines a this point.

Hello, I’m Allie!•5/8/24, 8:55 PM

Go ahead

blindChickenOP•5/8/24, 8:57 PM

Actually I think I just figured out the problem. If I include defaultdefault it appears to work.

blindChickenOP•5/8/24, 8:58 PM

Like this

export default class Mailer extends WorkerEntrypoint {...

export default class Mailer extends WorkerEntrypoint {...

instead of

export class Mailer extends WorkerEntrypoint {...

export class Mailer extends WorkerEntrypoint {...

BblindChicken Like this ```export default class Mailer extends WorkerEntrypoint {...``` instea...

Hello, I’m Allie!•5/8/24, 9:01 PM

Oh... Yeah, that's because

wrangler

wrangler

detects the type of the Worker based on whether or not you export defaultexport default. If it isn't export defaultexport default, then it assumes you are using Service Worker syntax

HHello, I’m Allie!Oh... Yeah, that's because `wrangler` detects the type of the Worker based on wh...

blindChickenOP•5/8/24, 9:05 PM

I tried to deploy my code and now it throws:

The uploaded script has no registered event handlers. [code: 10068]

The uploaded script has no registered event handlers. [code: 10068]

BblindChicken I tried to deploy my code and now it throws: ```The uploaded script has no regis...

Hello, I’m Allie!•5/8/24, 9:07 PM

~~Do you have any routes enabled?~~ Nvm

BblindChicken I tried to deploy my code and now it throws: ```The uploaded script has no regis...

Hello, I’m Allie!•5/8/24, 9:08 PM

Does your classclass have a fetch()fetch() method?

HHello, I’m Allie!Does your `class` have a `fetch()` method?

blindChickenOP•5/8/24, 9:09 PM

No. But neither does the code in examples of the blog.

BblindChicken No. But neither does the code in examples of the blog.

Hello, I’m Allie!•5/8/24, 9:09 PM

Does your

wrangler.toml

wrangler.toml

include a route/workers.dev?

Hello, I’m Allie!•5/8/24, 9:10 PM

The example on the blog appears to be for a Worker that can only be called via Service Bindings, so it shouldn't have any routes/crons/queues, etc.

blindChickenOP•5/8/24, 9:10 PM

name = "worker-t"
main = "src/worker.js"
compatibility_date = "2024-05-07"
node_compat = true

name = "worker-t"
main = "src/worker.js"
compatibility_date = "2024-05-07"
node_compat = true

blindChickenOP•5/8/24, 9:11 PM

No routes/crons/queues... and I'm trying to call it from a service binding.

BblindChicken ``` name = "worker-t" main = "src/worker.js" compatibility_date = "2024-05-07" n...

Hello, I’m Allie!•5/8/24, 9:11 PM

Try adding workers_dev = falseworkers_dev = false

Hello, I’m Allie!•5/8/24, 9:12 PM

IIRC it adds workers_devworkers_dev by default, unless you add a route

blindChickenOP•5/8/24, 9:12 PM

Same error!

BblindChicken Same error!

Hello, I’m Allie!•5/8/24, 9:20 PM

Ok, looking at it, it does appear to work if you add a fetch()fetch() method, even if it doesn't actually do anything

blindChickenOP•5/8/24, 9:22 PM

Yup! added async fetch(){}async fetch(){} to class and it deployed.

Hello, I’m Allie!•5/8/24, 9:23 PM

Filing an issue now

HHello, I’m Allie!Filing an issue now

blindChickenOP•5/8/24, 9:25 PM

Thanks, saves me the work!

HHello, I’m Allie!Filing an issue now

blindChickenOP•5/8/24, 9:27 PM

Any chance you can help me with my other issue:
workers-and-pages-helpService Binding Error "This Worker no longer exists"

nicco•5/8/24, 9:28 PM

Where could I find well-written cloudflare workers that I can use as reference? Something more complex than the examples in the docs

Hello, I’m Allie!•5/8/24, 9:30 PM

https://github.com/cloudflare/workers-sdk/issues/5788

GitHub

🐛 BUG: `WorkerEntrypoint` requires a handler to be uploaded · Issue...

Which Cloudflare product(s) does this pertain to? Wrangler core What version(s) of the tool(s) are you using? 3.53.1[Wrangler] What version of Node are you using? 22.1.0 What operating system and v...

blindChickenOP•5/8/24, 9:32 PM

@HardlyWorkin' It appears to have worked. The binding found worker and called the method. I made a mistake in my code, but that will be quickly fixed.

Steven•5/8/24, 9:56 PM

Hi all, I have a quick questions, I currently have a Worker that is responsible for putting json's in KV that will be read from a Cloudflare pages project. The idea is to prepopulate the cache in order to get super fast pages. At the moment I created a worker that runs fine locally and can add a few thousand entries into my local wrangler state. However after deploying the worker I hit the limit of 50 subrequests. I think I can rewrite the worker to use a queue and split up the work, thus reducing the number of subrequests. But I'm wondering what the best approach is for my use case?

HHello, I’m Allie!https://github.com/cloudflare/workers-sdk/issues/5788

Isaac McFadyen•5/8/24, 10:02 PM

Looks like a duplicate of https://github.com/cloudflare/workers-sdk/issues/5663

GitHub

🐛 BUG: hacky modules detection doesn't work remarkably well in prac...

Which Cloudflare product(s) does this pertain to? Wrangler core What version(s) of the tool(s) are you using? 3.51.2 What version of Node are you using? No response What operating system and versio...

IIsaac McFadyen Looks like a duplicate of https://github.com/cloudflare/workers-sdk/issues/5663

Hello, I’m Allie!•5/8/24, 10:05 PM

Not quite? As far as I can tell, it is detecting it is a Module Syntax Worker, it just complains that it doesn’t have any handlers

Hello, I’m Allie!•5/8/24, 10:05 PM

Because I am doing export default

HHello, I’m Allie!Not quite? As far as I can tell, it is detecting it is a Module Syntax Worker, i...

Isaac McFadyen•5/8/24, 10:06 PM

Yeah but if you scroll down a while in that Issue Kian discusses needing a

fetch

fetch

even if you have export default {}export default {}

Isaac McFadyen•5/8/24, 10:07 PM

Plus some other people chiming in

Isaac McFadyen•5/8/24, 10:07 PM

https://github.com/cloudflare/workers-sdk/issues/5663#issuecomment-2080991838

Renegade•5/9/24, 2:29 AM

how can i get the headers when using module-workers

RRenegade how can i get the headers when using module-workers

Hello, I’m Allie!•5/9/24, 7:42 AM

export default {
  fetch(req: Request) {
    const someHeader = req.headers.get("some-header");
  }
}

export default {
  fetch(req: Request) {
    const someHeader = req.headers.get("some-header");
  }
}

BBachMacintosh Can two Custom Domains from different Zones owned by the same Account (eg `api.e...

Hello, I’m Allie!•5/9/24, 8:38 AM

It should work fine, yeah

kelbs•5/9/24, 9:59 AM

Does anyone know if there's a rough timeline for full nodejs compatibility?

I've read docs and blog posts about compatibility, but they never mention

the APIs that still aren't implemented
the timeline for implementing them

Kkelbs Does anyone know if there's a rough timeline for full nodejs compatibility? I'v...

Hello, I’m Allie!•5/9/24, 10:08 AM

AFAIK, never. Some APIs don’t make sense in a serverless context, or the way Workers works in particular

Barry_Based_Benson•5/9/24, 3:07 PM

[vars]
dotenv = ".env"

in wrangler.toml how do import the vars for the cloudflare worker to use from my own .env file? currently it seems cloudflare is interpreting dotenv as its own variable rather than importing the variables