I need that for generating hash and use that for caching the queries using kv

M

mauOP•4/18/24, 9:04 PM

I appreciate your help.

Mmau I need that for generating hash and use that for caching the queries using kv

I

Isaac McFadyen•4/18/24, 9:12 PM

If this is for non-cryptographic purposes you can use

crypto.subtle

crypto.subtle

which is built into all Workers, even without node compat: https://developers.cloudflare.com/workers/runtime-apis/web-crypto/#digest

I

Isaac McFadyen•4/18/24, 9:12 PM

Just do a

digest

digest

using SHA-1

IIsaac McFadyen If this is for non-cryptographic purposes you can use `crypto.subtle` which is b...

I

Iaci•4/18/24, 9:13 PM

exactly this

I

Iaci•4/18/24, 9:13 PM

i use these functions to create SHA-256 hash from a string:

async function hashString(input) {
  const encoder = new TextEncoder();
  const data = encoder.encode(input);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);
  return bufferToHex(hashBuffer);
}

function bufferToHex(buffer) {
  const view = new DataView(buffer);
  let hex = '';
  for (let i = 0; i < view.byteLength; i += 1) {
    const byte = view.getUint8(i).toString(16);
    hex += byte.padStart(2, '0');
  }
  return hex;
}

async function hashString(input) {
  const encoder = new TextEncoder();
  const data = encoder.encode(input);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);
  return bufferToHex(hashBuffer);
}

function bufferToHex(buffer) {
  const view = new DataView(buffer);
  let hex = '';
  for (let i = 0; i < view.byteLength; i += 1) {
    const byte = view.getUint8(i).toString(16);
    hex += byte.padStart(2, '0');
  }
  return hex;
}

async function hashString(input) {
  const encoder = new TextEncoder();
  const data = encoder.encode(input);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);
  return bufferToHex(hashBuffer);
}

function bufferToHex(buffer) {
  const view = new DataView(buffer);
  let hex = '';
  for (let i = 0; i < view.byteLength; i += 1) {
    const byte = view.getUint8(i).toString(16);
    hex += byte.padStart(2, '0');
  }
  return hex;
}

async function hashString(input) {
  const encoder = new TextEncoder();
  const data = encoder.encode(input);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);
  return bufferToHex(hashBuffer);
}

function bufferToHex(buffer) {
  const view = new DataView(buffer);
  let hex = '';
  for (let i = 0; i < view.byteLength; i += 1) {
    const byte = view.getUint8(i).toString(16);
    hex += byte.padStart(2, '0');
  }
  return hex;
}

M

mauOP•4/19/24, 1:51 AM

Thanks guys!

M

mauOP•4/19/24, 1:51 AM

I will give it a try

JJames Sadly Hyperdrive requires `node_compat` for the recommended `pg` driver today. Y...

H

Hebilicious•4/19/24, 7:17 AM

Hey are you sure about this? I'm using the flag and postgres.js with hyperdrive and caching appears to be working (altough there is some other performance issues)

S

Sam•4/19/24, 10:38 AM

Does a call to a RPC function count as an additional request? Or is it "free" to use RPC function within Workers? The docs don't mention this, so I assume it's not being billed. But want to be sure.

SSam Does a call to a RPC function count as an additional request? Or is it "free" to...

H

Hello, I’m Allie!•4/19/24, 10:42 AM

IIRC, a call to function on an RPC Stub is free. A call to a function on a DO/Service Binding Stub is billed

Y

Yakuzo•4/19/24, 2:24 PM

Hi, I have a little problem but I think it's a bug so I'd rather share it. In a dev environment, with one worker communicating with another using RPC, and with an environment variable configuration for dev and prod like this :

[env.dev.vars]
API_HOST = "localhost"
API_PORT = "9000"
[env.production.vars]
API_HOST = "engine.corsa.club"
API_PORT = "443"

[env.dev.vars]
API_HOST = "localhost"
API_PORT = "9000"
[env.production.vars]
API_HOST = "engine.corsa.club"
API_PORT = "443"

[env.dev.vars]
API_HOST = "localhost"
API_PORT = "9000"
[env.production.vars]
API_HOST = "engine.corsa.club"
API_PORT = "443"

[env.dev.vars]
API_HOST = "localhost"
API_PORT = "9000"
[env.production.vars]
API_HOST = "engine.corsa.club"
API_PORT = "443"

My Worker A calling Worker B can't find a worker with the name I assigned to Worker B.
Command that works:
npx wrangler dev -c authentification/wrangler.toml --port 9002
Command that doesn't work:
npx wrangler dev -c authentification/wrangler.toml --env dev --port 9002

By adding the "env" property, it no longer finds the Worker

YYakuzo Hi, I have a little problem but I think it's a bug so I'd rather share it. In a ...

K

kian•4/19/24, 2:45 PM

Environments change the name of the Worker

K

kian•4/19/24, 2:45 PM

If you have

name = "foo"

name = "foo"

and don't specify a name specifically under

env.dev

env.dev

, then that Worker when ran with

--env dev

--env dev

is now called

foo-dev

foo-dev

.

K

kian•4/19/24, 2:46 PM

https://developers.cloudflare.com/workers/wrangler/environments/

Kkian If you have `name = "foo"` and don't specify a name specifically under `env.dev`...

Y

Yakuzo•4/19/24, 2:46 PM

Oh okay

Y

Yakuzo•4/19/24, 2:48 PM

Make sense now, thanks

L

Lambo•4/19/24, 8:44 PM

Is it possible to have a scheduled worker call to a HTTP worker via a binding? All the examples I see mention passing on the

request.url

request.url

when calling

fetch()

fetch()

, which wouldn't exist within the context of a scheduled worker?

L

Lambo•4/19/24, 8:48 PM

Ah okay, thanks!

L

luna•4/20/24, 12:18 AM

is there an expected delay from a request happening to it showing up on the metrics page?

L

luna•4/20/24, 1:09 AM

do tail workers only work for fetch requests?

K

kian•4/20/24, 1:25 AM

Should work for everything - it's the same stuff that powers

wrangler tail

wrangler tail

L

luna•4/20/24, 1:31 AM

hmm.

L

luna•4/20/24, 1:43 AM

do i maybe have it setup wrong?

i have this in my wrangler.toml with the main file exporting fetch, scheduled and queue handlers.

[[queues.producers]]
queue = "stats"
binding = "QUEUE"

[[queues.consumers]]
queue = "stats"
max_batch_size = 10
max_batch_timeout = 30

[[queues.producers]]
queue = "stats"
binding = "QUEUE"

[[queues.consumers]]
queue = "stats"
max_batch_size = 10
max_batch_timeout = 30

[[queues.producers]]
queue = "stats"
binding = "QUEUE"

[[queues.consumers]]
queue = "stats"
max_batch_size = 10
max_batch_timeout = 30

[[queues.producers]]
queue = "stats"
binding = "QUEUE"

[[queues.consumers]]
queue = "stats"
max_batch_size = 10
max_batch_timeout = 30

Screenshot_2024-04-20_at_11.12.27_am.png

K

kian•4/20/24, 1:46 AM

And your Tail Worker isn't being invoked?

L

luna•4/20/24, 2:31 AM

nope

L

luna•4/20/24, 3:50 AM

ignore me, i wasnt looking at the correct tab.

O

oof2win2•4/20/24, 7:49 AM

does CF have some product which allows pubsub for clients? i only need sub so i thought of polling and websockets, but was wondering if cf has something better for scale

Z

zegevlier•4/20/24, 9:48 AM

Not an employee, but the startup time you're referring to is the startup limit. As in, your worker needs to be able to start up within that time for it to run at all.

A Worker must be able to be parsed and execute its global scope (top-level code outside of any handlers) within 400 ms. Worker size can impact startup because there is more code to parse and evaluate. Avoiding expensive code in the global scope can keep startup efficient as well.

Z

zegevlier•4/20/24, 9:49 AM

Are you seeing slow cold starts? What promted this question?

Z

zegevlier•4/20/24, 9:53 AM

As far as I know that's still the case. And you're right that a larger script results in a longer cold-start time, so if you require fast starts make sure to keep your worker small.

F

FabulousCupcake•4/20/24, 10:37 AM

dumb question but how do I just build the minified worker.js with

wrangler

wrangler

without deploying it?

F

FabulousCupcake•4/20/24, 10:37 AM

e.g. with

wrangler deploy

wrangler deploy

it builds it and uploads it, but I just need it to stop at build :blobthinking:

F

FabulousCupcake•4/20/24, 10:38 AM

for context I'm trying to run workerd

F

FabulousCupcake•4/20/24, 10:40 AM

nvm I figured it out; it uses esbuild so you can also just

npx esbuild --bundle --minify src/index.js > worker.js

npx esbuild --bundle --minify src/index.js > worker.js

FFabulousCupcake nvm I figured it out; it uses esbuild so you can also just `npx esbuild --bundle...

K

kian•4/20/24, 10:41 AM

there’s also —dry-run and —outdir args to wrangler deploy

F

FabulousCupcake•4/20/24, 10:41 AM

oh! yeah I needed the dry-run; the outdir still prompted me to deploy

F

FabulousCupcake•4/20/24, 10:41 AM

thank you

L

Lambo•4/20/24, 11:30 AM

Is there a known issue around the

cloudflare/wrangler-action@v3

cloudflare/wrangler-action@v3

sometimes failing to deploy due to binding to D1 failing (error 10021)? I can simply re-run my Action and it then succeeds, so it seems to be a bug. I can raise an issue if required

V

Victor•4/20/24, 12:00 PM

Hi all, is it possible to access env variables set in

wrangler.toml

wrangler.toml

outside of the

index.ts fech()

index.ts fech()

method

VVictor Hi all, is it possible to access env variables set in `wrangler.toml` outside of...

H

Hello, I’m Allie!•4/20/24, 12:02 PM

Not within the global scope. Anything that needs access to the environment has to be called within the context of an incoming event

HHello, I’m Allie!Not within the global scope. Anything that needs access to the environment has t...

V

Victor•4/20/24, 12:03 PM

Hm okay, thanks. I'll have to restructure some code then

Y

Yakuzo•4/21/24, 10:46 AM

Hi, do you know if there is a way to create this kind of communication scheme between workers on cloudflare or not? ( By this I mean automatically )

ZZach Jensz looking to build an ecommerce site on cloudflare's edge, does anyone have a repo...

R

rob•4/21/24, 11:25 AM

Backend code can write workers using routes and adding a stuff to db

D

dave•4/21/24, 12:21 PM

For a Durable Object doing a subrequest, is the timeout still 100 seconds?

K

khichipichi•4/21/24, 1:19 PM

hi all i want to pay my bill is not possibol

I need that for generating hash and use that for caching the queries using kv

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