the variables aren't defined at global scope level, only on each request. See the example at https:/

the variables aren't defined at global scope level, only on each request. See the example at https://developers.cloudflare.com/kv/api/read-key-value-pairs/

kp1197•1/21/24, 1:12 AM

Got it, Ill try that

CCyb3r-Jak3 the variables aren't defined at global scope level, only on each request. See th...

kp1197•1/22/24, 8:32 PM

That worked, thank you. I had rapidly coded it up, made a note to myself to double check the kv access code and then forgot to circle back and reference the docs. Appreciate the help. That was my amaetur hour moment!

kp1197•1/22/24, 10:38 PM

I'm looking a kv_namespaces for workers, and from what i understand, preview_id is an extra measure to prevent writing / reading from prod kv values. So, even if I have separate environments in my wrangler.toml for env.dev and env.production, the preview

kp1197•1/22/24, 10:39 PM

_id adds an additional layer of safety, making it impossible to write to prod kv_namespaces

kp1197•1/22/24, 10:39 PM

So here is my question:

kp1197•1/22/24, 10:40 PM

I already have a separate KV_namespace (three different IDs) for each of my environments, env.dev, env.staging and env.production. So, should I create a preview_id and assign that same preview_id to each of my kv_namespaces' preview_id? That way, no matter what environment I specify when i run npx wranger dev, it will always hit the namespace indicated by that preview_id?

kp1197•1/22/24, 10:47 PM

Creating three spearate preview_ids for dev, staging, and production seems like it would unnecessarily clutter things up

fasm•1/24/24, 12:17 PM

Hi all, I'm running the request in the KV API docs here (https://developers.cloudflare.com/api/operations/workers-kv-namespace-write-key-value-pair-with-metadata) , but I'm getting the following response:

{
  result: null,
  success: false,
  errors: [
    {
      code: 10047,
      message: "can not parse value and metadata from multipart request body: 'error getting part of multipart request, after reading 0 parts: 'multipart: NextPart: EOF''"
    }
  ],
  messages: []
}

{
  result: null,
  success: false,
  errors: [
    {
      code: 10047,
      message: "can not parse value and metadata from multipart request body: 'error getting part of multipart request, after reading 0 parts: 'multipart: NextPart: EOF''"
    }
  ],
  messages: []
}

Any ideas?

Cloudflare API Documentation

Interact with Cloudflare's products and services via the Cloudflare API

kian•1/24/24, 12:20 PM

What does your code/command look like?

Darick•1/24/24, 6:47 PM

Is there a way to specify a starting point when listing KV values with

list()

list()

, similar to the

start

start

startAfter

startAfter

options for Durable Object storage: https://developers.cloudflare.com/durable-objects/api/transactional-storage-api/#supported-options-2 ?

(I see the

cursor

cursor

but it's not perfect because it would require first listing all of the previous values and getting the

limit

limit

exactly right ...)

Transactional Storage · Cloudflare Durable Objects docs

The Transactional Storage API allows you to achieve consistent key-value storage.

Behunin•1/24/24, 7:49 PM

Is this the way to get permissions for all the

Workers KV Namespace

Workers KV Namespace

API endpoints or do I need an API Key?

Unsmart•1/26/24, 6:07 PM

It doesnt write to the same key so it doesnt have any delay as a new key will be able to read instantly

Mmatt_d Hi Behunin. I just tried this out on my personal account to double check. The an...

Behunin•1/26/24, 9:08 PM

Thank you for the validation.

spaone•1/26/24, 10:24 PM

I am trying to use a worker to store data with kv. I am trying to import KVNamespace from 'storage' At the beginning of the code to then use KVNamespace.create later on. However, I am getting an error from storage.

kian•1/26/24, 10:44 PM

Neither of those are a thing in Workers

kian•1/26/24, 10:44 PM

Are you referring to a specific wrapper library?

Tilon•1/31/24, 9:56 PM

Hi, we are using KV for caching image blobs. Once in a while we experience that the data we stored in KV is corrupt. We are trying to figure out if that happens before or during saving the data in KV - Unlike R2 we cannot provide a checksum when writing to KV so we are wondering if KV does some sort of integrity check under the hood? Is it possible that data could be written “half way” and get corrupted if the writing worker crashes or similar?

TTilon Hi, we are using KV for caching image blobs. Once in a while we experience that ...

Matt Silverlock•2/1/24, 2:21 PM

This would be surprising to us (we have never had any reports) - how are you assessing corruption? In other words when you retrieve a key value pair, how do you know it’s corrupted?

Mmatt_d Yes, the `prefix` argument to `list()`. (Of course this requires knowing about `...

Darick•2/1/24, 10:09 PM

Thank you MattD.

Within a prefix, though, I want to be able to specify start (and end) points similar to what the Durable Object Transactional Storage API offers: https://developers.cloudflare.com/durable-objects/api/transactional-storage-api/#supported-options-2

Is this possible in KV, or is it something that might be added in the future?

Transactional Storage · Cloudflare Durable Objects docs

The Transactional Storage API allows you to achieve consistent key-value storage.

bz_008•2/6/24, 8:20 AM

how to get the first and last keys from a KV?

Bbz_008 how to get the first and last keys from a KV?

Hello, I’m Allie!•2/6/24, 8:20 AM

You would have to list through the namespace

bz_008•2/6/24, 8:22 AM

I know, but I still don't know how to get first and last one since [0] and [length-1] don't work

Bbz_008 I know, but I still don't know how to get first and last one since [0] and [leng...

Hello, I’m Allie!•2/6/24, 8:23 AM

You have to run list multiple times if you have more than 1k keys

bz_008•2/6/24, 8:23 AM

yeah, that's another issue

bz_008•2/6/24, 8:25 AM

KV looks a little hard to use to me..

Bbz_008 yeah, that's another issue

Hello, I’m Allie!•2/6/24, 8:27 AM

Like this:

async function getFirstAndLast(KV: KVNamespace) {
    let listResult = await KV.list();
    const first = listResult.keys[0];
    while(!listResult.list_complete) {
        listResult = await KV.list({cursor: listResult.cursor});
    }
    const last = listResult.keys[listResult.keys.length - 1];
    return { first, last };
}

async function getFirstAndLast(KV: KVNamespace) {
    let listResult = await KV.list();
    const first = listResult.keys[0];
    while(!listResult.list_complete) {
        listResult = await KV.list({cursor: listResult.cursor});
    }
    const last = listResult.keys[listResult.keys.length - 1];
    return { first, last };
}

HHello, I’m Allie!Like this: ```ts async function getFirstAndLast(KV: KVNamespace) { let listR...

bz_008•2/6/24, 8:35 AM

Cool, thanks for the help

Santosh•2/8/24, 5:03 PM

Guys, I have stored a large object in KV. Definitely not 25MB limit being reached, and write it using Json.stringify. When I read it back, ocassionally Json.parse throws Unterminated string error. How do I handle this. Seems like this happens with large valiues.

Santosh•2/8/24, 5:03 PM

It does appear like JSON is not the right format for KV for large objects. What do I do?

Santosh•2/8/24, 5:05 PM

Is Json the only format to write to KV? Can someone throw some light here? This is currently happening locally, not sure if we will see this on CF>

zegevlier•2/8/24, 5:05 PM

Any reason you're not just putting the object directly into KV, instead of converting it to JSON first?

Santosh•2/8/24, 5:05 PM

Thats what the current documentation shows.

Santosh•2/8/24, 5:06 PM

Is it possible to write raw object type to KV?

zegevlier•2/8/24, 5:06 PM

I thought it was but looking at the docs I might be misremembering

zegevlier•2/8/24, 5:06 PM

let me check

Zzegevlier Any reason you're not just putting the object directly into KV, instead of conve...

Hello, I’m Allie!•2/8/24, 5:06 PM

KV only takes strings/ArrayBuffers no?

Hello, I’m Allie!•2/8/24, 5:07 PM

ReadableStreams that are stored as an ArrayBuffer

zegevlier•2/8/24, 5:09 PM

Yea I was misremembering, I thought both DOs and KV supported that but it seems only DOs do

Zzegevlier Yea I was misremembering, I thought both DOs and KV supported that but it seems ...

Hello, I’m Allie!•2/8/24, 5:10 PM

Yeah. DOs were the first to use v8.serialize. This also means that KV doesn't support any of the more complex objects

SSantosh Is Json the only format to write to KV? Can someone throw some light here? This ...

zegevlier•2/8/24, 5:10 PM

You can write to KV using any format you want, you just need to serialize it first. JSON should work though, unless you go over the 25mb limit

zegevlier•2/8/24, 5:11 PM

Are you sure the JSON stringified object also does not hit that limit?

Santosh•2/8/24, 5:21 PM

yes, its like 2 MB when I pull the data from another server prior to keeping it in KV

Santosh•2/8/24, 5:21 PM

I used postman to veriify the graphql response

Santosh•2/8/24, 5:22 PM

Can I get some alternatives to Json that works on Cloudflare worker?

{ result: null, success: false, errors: [ { code: 10047, message: "can not parse value and metadata from multipart request body: 'error getting part of multipart request, after reading 0 parts: 'multipart: NextPart: EOF''" } ], messages: [] }

async function getFirstAndLast(KV: KVNamespace) { let listResult = await KV.list(); const first = listResult.keys[0]; while(!listResult.list_complete) { listResult = await KV.list({cursor: listResult.cursor}); } const last = listResult.keys[listResult.keys.length - 1]; return { first, last }; }

the variables aren't defined at global scope level, only on each request. See the example at https:/

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