interesting! so bind a single worker to a DO and put all the scheduling logic there?

Ssimpson interesting! so bind a single worker to a DO and put all the scheduling logic th...

S

sathoro•9/18/23, 1:00 PM

sort of, but in your case you might want multiple DOs for each cron to simplify the scheduling. although I've also seen a library that would help with this (can't find it...)

Ssimpson interesting! so bind a single worker to a DO and put all the scheduling logic th...

S

sathoro•9/18/23, 1:05 PM

can make your own scheduler with a single DO (but multiple instances) like this using

itty-durable

itty-durable

import { createDurable } from "itty-durable";

export class Scheduler extends createDurable({ autoPersist: true }) {
  constructor(state, env) {
    super(state, env);
  }

  create(name, doEverySeconds = 30) {
    this.name = name;
    this.doEverySeconds = doEverySeconds;

    this.setAlarm(Date.now());
  }

  async alarm() {
    console.log(`Doing ${this.name}...`);

    this.setAlarm(Date.now() + this.doEverySeconds * 1000);

    // do the thing...
  }
}

import { createDurable } from "itty-durable";

export class Scheduler extends createDurable({ autoPersist: true }) {
  constructor(state, env) {
    super(state, env);
  }

  create(name, doEverySeconds = 30) {
    this.name = name;
    this.doEverySeconds = doEverySeconds;

    this.setAlarm(Date.now());
  }

  async alarm() {
    console.log(`Doing ${this.name}...`);

    this.setAlarm(Date.now() + this.doEverySeconds * 1000);

    // do the thing...
  }
}

import { createDurable } from "itty-durable";

export class Scheduler extends createDurable({ autoPersist: true }) {
  constructor(state, env) {
    super(state, env);
  }

  create(name, doEverySeconds = 30) {
    this.name = name;
    this.doEverySeconds = doEverySeconds;

    this.setAlarm(Date.now());
  }

  async alarm() {
    console.log(`Doing ${this.name}...`);

    this.setAlarm(Date.now() + this.doEverySeconds * 1000);

    // do the thing...
  }
}

import { createDurable } from "itty-durable";

export class Scheduler extends createDurable({ autoPersist: true }) {
  constructor(state, env) {
    super(state, env);
  }

  create(name, doEverySeconds = 30) {
    this.name = name;
    this.doEverySeconds = doEverySeconds;

    this.setAlarm(Date.now());
  }

  async alarm() {
    console.log(`Doing ${this.name}...`);

    this.setAlarm(Date.now() + this.doEverySeconds * 1000);

    // do the thing...
  }
}

S

sathoro•9/18/23, 1:05 PM

and the DO can import whatever code it needs to from your codebase directly

S

sathoro•9/18/23, 1:06 PM

(

itty-durable

itty-durable

is not needed, it just makes the code way shorter)

D

dave•9/18/23, 2:41 PM

Does

.fetch

.fetch

.fetch

.fetch on a Service Worker binding do anything with the

cache-control

cache-control

cache-control

cache-control header?

TTraffy Does worker supports mongoose or mongodb driver?

L

Legendarist•9/18/23, 4:35 PM

https://www.mongodb.com/developer/products/atlas/cloudflare-worker-rest-api/

Create a REST API with Cloudflare Workers and MongoDB Atlas | MongoDB

Learn how to create a serverless REST API using Cloudflare workers and MongoDB Atlas.

LLegendarist https://www.mongodb.com/developer/products/atlas/cloudflare-worker-rest-api/

I

Isaac McFadyen•9/18/23, 5:06 PM

That's Atlas only but yes.

I

Isaac McFadyen•9/18/23, 5:06 PM

(Atlas is their hosted service)

D

dave•9/18/23, 6:56 PM

Can I do a Worker service binding from Worker #1 in local mode (

wrangler dev

wrangler dev

), that goes to Worker #2 in remote mode (

wrangler dev --remote

wrangler dev --remote

)?

D

dave•9/18/23, 7:02 PM

https://github.com/cloudflare/cloudflare-docs/commit/b03a8368f7f0b8a9eb89a7276baef894bad71078

GitHub

fix: cannot interact with service bindings locally (#9890) · cloudf...

The documentation provides a non-existent argument for

pages dev

pages dev

. Even if it is planned to add the functionality in future, right now the instruction is rather confusing than helpful.

D

dave•9/18/23, 7:02 PM

seems like no?

M

MetalGear•9/18/23, 7:35 PM

would you guys say that cloudflare workers are fully capable of building a hotel PMS system? I have seen alot of people use workers for MVP but wondering if you guys reccomend it for a scalable saas

MMetalGear would you guys say that cloudflare workers are fully capable of building a hotel...

S

sathoro•9/18/23, 7:36 PM

it scales yes

S

sathoro•9/18/23, 7:36 PM

Web Scale

M

MetalGear•9/18/23, 7:37 PM

in what cases would you guys say yeah go with monolith because cloudflare workers wont be a good fit for that

U

Unsmart•9/18/23, 7:51 PM

I would personally never go with a monolith

U

Unsmart•9/18/23, 7:51 PM

theres serverless cases for probably everything

C

Cyb3r-Jak3•9/18/23, 7:53 PM

I mean depends on the stack. If you need lots of pieces then monolithic can be easier to maintain and deploy

CCyb3r-Jak3 I mean depends on the stack. If you need lots of pieces then monolithic can be e...

M

MetalGear•9/18/23, 8:17 PM

I guess I’m just wondering what the limitations of cloudflare workers are. Is it recommended to build a whole saas hotel reservation system on it for example

U

Unsmart•9/18/23, 8:20 PM

Can you build a hotel reservation system on workers - yes. Should you? Do you know how to use cloudflare can you hire people who are good at cloudflare.

UUnsmart Can you build a hotel reservation system on workers - yes. Should you? Do you kn...

M

MetalGear•9/18/23, 8:25 PM

Yes I’d say I’m good at building apis on workers with honojs. I’m a one man team

M

MetalGear•9/19/23, 12:05 AM

does anyone know how I can make npx wrangler dev use data the is in my deployed worker. It was using it but its now stale for some reason

MMetalGear does anyone know how I can make npx wrangler dev use data the is in my deployed ...

C

Cyb3r-Jak3•9/19/23, 12:12 AM

Like a binding?

CCyb3r-Jak3 Like a binding?

M

MetalGear•9/19/23, 12:13 AM

No like I have DO persistent storage data in my deployed worker

M

MetalGear•9/19/23, 12:13 AM

I want to basically run npx wrangler dev and use the latest data that is in deployed worker.

M

MetalGear•9/19/23, 12:14 AM

I thought that happened automatically whenever I restart npx wrangler dev but for some reason its not right now.

M

MetalGear•9/19/23, 12:14 AM

I am using the latest version of wrangler btw

C

Cyb3r-Jak3•9/19/23, 12:18 AM

Have you tried using the

--remote

--remote

flag with wrangler dev? I am not sure how it works with DO but that is the standard way for interacting with remote bindings

M

matt•9/19/23, 2:46 AM

Where's the best place to raise small issues with the Workers docs?

K

kian•9/19/23, 2:51 AM

https://github.com/cloudflare/cloudflare-docs/issues

GitHub

Issues · cloudflare/cloudflare-docs

Cloudflare’s documentation. Contribute to cloudflare/cloudflare-docs development by creating an account on GitHub.

M

matt•9/19/23, 2:56 AM

Thanks @kian

one other quick question, I see on the community forums it is possible to route a Worker request to a specific colo. But I can't seem to find where this is documented

K

kian•9/19/23, 3:05 AM

It isn’t documented since it isn’t a feature that’s available

M

matt•9/19/23, 3:09 AM

ok thanks! for context, im trying to build something similar to durable objects I tried DO's but performance was not great from Australia, with each round trip to DO costing 200-400ms. My target roundtrip is 20-30ms

I read that each worker has a singleton in each colo with shared memory, having access to the routing would help me build something do-like. Is that a good enough use case to gain access to custom routing?

U

Unsmart•9/19/23, 3:30 AM

I’m not sure they even really offer that to enterprise customers beyond maybe jurisdictions but also using global scope is something suggested not to do

M

matt•9/19/23, 3:32 AM

It seems to be recommended here:
https://developers.cloudflare.com/workers/platform/limits/#memory

Use global variables to persist data between requests on individual nodes

M

matt•9/19/23, 3:33 AM

There is also a thread about the ability to route to a specific worker DC colo: https://community.cloudflare.com/t/how-to-run-workers-on-specific-datacenter-colos/385851

M

matt•9/19/23, 3:35 AM

No wait, it's this one:
https://community.cloudflare.com/t/explicitly-choosing-worker-location-to-perform-request-based-on-path/383886

�

💻🐒🔫🔥🤖•9/19/23, 3:39 AM

Is it possible to make auto-deployments only trigger when a pull request is made on a github branch? As opposed to on every single commit?

I

Izrath•9/19/23, 3:40 AM

Im building out a discord bot which requires a response in 3 seconds. My function will take longer than that so I need to execute a separate worker separately to run my function and update discord when its done. Is it do-able to call another worker and then return/end my current worker?

K

kian•9/19/23, 3:42 AM

You return a deferred response and use waitUntil to patch that message

K

kian•9/19/23, 3:43 AM

https://developers.cloudflare.com/workers/runtime-apis/fetch-event/#waituntil

FetchEvent · Cloudflare Workers docs

In Workers, any incoming HTTP requests are referred to as "fetch" events. A Worker will respond to the HTTP request with the handler method that was …

I

Izrath•9/19/23, 3:56 AM

Thanks, the example I am building off of uses itty-router, which I think uses the ES modules format. This article helps, I think I was just missing the context variable. Thanks!

Mmatt ok thanks! for context, im trying to build something similar to durable objects ...

H

Hello, I’m Allie!•9/19/23, 7:24 AM

I would note too that even requests from the same device(and not the same app) can be routed to two different datacenters, so you aren’t guaranteed to ever hit the same one twice

HHello, I’m Allie!I would note too that even requests from the same device(and not the same app) c...

M

matt•9/19/23, 10:24 AM

In aware - see the community thread I linked to where it’s mentioned that you can route requests to a specific Colo after it hits the first worker

Mmatt In aware - see the community thread I linked to where it’s mentioned that you ca...

H

Hello, I’m Allie!•9/19/23, 10:28 AM

As far as I can tell with that specific demo, it will route you to a specific Colo(which may contain multiple datacenters). And even then, you still aren't guaranteed to hit the same physical machine(or isolate, depending on traffic levels), which would be required to be able to reuse the global scope.

B

bkyerv•9/19/23, 10:33 AM

hello everyone, I am working on streaming text data from an OpenAI endpoint to my client while maintaining the stream's continuous nature. However, I keep encountering an error that suggests the ReadableStream is expected to handle byte-like data. Is there a way to configure TransformStream to work with text or string data instead?

B

bkyerv•9/19/23, 10:34 AM

Uncaught (in promise) TypeError: This ReadableStream did not return bytes.

Uncaught (in promise) TypeError: This ReadableStream did not return bytes.

Uncaught (in promise) TypeError: This ReadableStream did not return bytes.

Uncaught (in promise) TypeError: This ReadableStream did not return bytes.

Bbkyerv hello everyone, I am working on streaming text data from an OpenAI endpoint to m...

H

Hello, I’m Allie!•9/19/23, 10:34 AM

Can't you convert to-from bytes with

Text(En/De)coder

Text(En/De)coder

Text(En/De)coder

Text(En/De)coder?

B

bkyerv•9/19/23, 10:35 AM

I thought if openai returns chunks in string I can do the same. Are you suggesting to convert the string chunks I received from openai to bytes before transmitting to client?

Bbkyerv I thought if openai returns chunks in string I can do the same. Are you suggesti...

H

Hello, I’m Allie!•9/19/23, 10:36 AM

Maybe? Try it, and see if it works

interesting! so bind a single worker to a DO and put all the scheduling logic there?

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