Cloudflare Developers•2y ago

Though note that your Worker cannot do IO in startup mode

Hello, I’m Allie!OP•1/31/24, 4:57 PM

So you can't fetch stuff or interact with Bindings

HHello, I’m Allie!Though note that your Worker cannot do IO in startup mode

SSDD•1/31/24, 5:46 PM

I don't know about other langs, but I found very interesting way around (for rust)..

if we have files predefined, then we can load the content at compile time

example:

macro_rules! load_file {
    ($name:literal) => {
        include_str!(concat!(
            env!("CARGO_MANIFEST_DIR"),
            "/some/path",
            $name
        ))
    };
}

macro_rules! load_file {
    ($name:literal) => {
        include_str!(concat!(
            env!("CARGO_MANIFEST_DIR"),
            "/some/path",
            $name
        ))
    };
}

this will read the file content and we store it in memory

SSSDD can I get some links

SSDD•1/31/24, 5:46 PM

can someone help with this please

SSSDD I don't know about other langs, but I found very interesting way around (for rus...

Hello, I’m Allie!OP•1/31/24, 5:53 PM

Yeah, though too, if you can do that, you should be able to precompute the result too, depending on what you are doing

SSSDD I noticed that requests are cached with workers by default, how does that work? ...

dave•1/31/24, 6:16 PM

you can override it by setting cache rules in the cloudflare dashboard ui for any domain

Ddave you can override it by setting cache rules in the cloudflare dashboard ui for an...

SSDD•1/31/24, 6:25 PM

I am looking for some docs which says how to content is cached

I have a worker deployed, which makes post requests and gets json as response which is cached I think

but I want to know if it's cached in the browser or the local server or is it cached for all workers like kv

SSSDD I am looking for some docs which says how to content is cached I have a worker...

dave•1/31/24, 6:26 PM

which makes post requests and gets json as response

POST requests aren't going to be cached by default.

SSDD•1/31/24, 6:26 PM

SSDD•1/31/24, 6:27 PM

looks like it's cached

SSDD•1/31/24, 6:28 PM

1st response took 2.4 sec then it was ~50ms

dave•1/31/24, 6:29 PM

I can't tell if the your browser is caching or not from that screenshot

dave•1/31/24, 6:29 PM

you can do

wrangler tail

wrangler tail

to see if your worker is being hit or not

SSDD•1/31/24, 6:30 PM

there is no implementation for caching

SSDD•1/31/24, 6:30 PM

running without remote flag takes around the same time for each req

SSDD•1/31/24, 6:30 PM

afaik egress is cached

SSDD•1/31/24, 6:30 PM

but at what level

Isaac McFadyen•1/31/24, 6:34 PM

GraphQL requests are cached by default with some GraphQL servers so if it's caching a GraphQL POST then that's probably why.

Isaac McFadyen•1/31/24, 6:34 PM

(as in, not at the CDN level, it would be at the Worker/GraphQL library level)

SSDD•1/31/24, 6:35 PM

what's worker level? The local server?

SSSDD what's worker level? The local server?

Isaac McFadyen•1/31/24, 6:35 PM

I assume you have a Worker serving GraphQL requests there?

IIsaac McFadyen GraphQL requests are cached by default with some GraphQL servers so if it's cach...

SSDD•1/31/24, 6:36 PM

nope, the back end is our graphql server, it does not have any caching implemented for worker

IIsaac McFadyen I assume you have a Worker serving GraphQL requests there?

SSDD•1/31/24, 6:36 PM

yes

SSSDD yes

Isaac McFadyen•1/31/24, 6:36 PM

What GraphQL server is it?

Isaac McFadyen•1/31/24, 6:36 PM

For example, Apollo server sometimes has caching enabled by default.

Isaac McFadyen•1/31/24, 6:37 PM

It's definitely not the CDN caching it unless you have specifically told the CDN to cache it somehow.

SSDD•1/31/24, 6:37 PM

we are making some thing like apollo server

SSDD•1/31/24, 6:37 PM

https://github.com/tailcallhq/tailcall/

Isaac McFadyen•1/31/24, 6:38 PM

It looks like you have a cache of some sort there?

Isaac McFadyen•1/31/24, 6:39 PM

https://github.com/tailcallhq/tailcall/blob/main/src/http/cache.rs

SSDD•1/31/24, 6:39 PM

yes that's different thing

SSDD•1/31/24, 6:39 PM

it's entity cache

SSDD•1/31/24, 6:39 PM

you can use

@cache

@cache

operator in the schema, which caches specific parts of the schema

SSDD•1/31/24, 6:39 PM

with specified ttl

IIsaac McFadyen <https://github.com/tailcallhq/tailcall/blob/main/src/http/cache.rs>

SSDD•1/31/24, 6:45 PM

I thought you were referring to https://github.com/tailcallhq/tailcall/blob/main/cloudflare/src/cache.rs

but anyways even that code is not used, it was recently introduced, the screenshot is quite old

GaryDix•1/31/24, 11:43 PM

The comments i get are for another worker that is running, the one under fev is silent/

dave•1/31/24, 11:48 PM

Is it possible to force smart placement to be on?

GaryDix•1/31/24, 11:51 PM

What is that?

GaryDix•2/1/24, 12:01 AM

no one is particualrly talking to anyone

Adi•2/1/24, 2:59 AM

Hey all, question. From the behavior I'm seeing, smart placement does not count requests to R2 as "subrequests", and therefore is not getting past the

INSUFFICIENT_SUBREQUESTS

INSUFFICIENT_SUBREQUESTS

placement status.
Is this expected behavior?

Ddave Is it possible to force smart placement to be on?

Cyb3r-Jak3•2/1/24, 4:02 AM

What do you mean by force? If you set it then it should be on. You can’t force a location though

Sunil Kumar•2/1/24, 6:29 AM

I'm working on a small project i.e.., A user can install there subdomain path form main domain

ex :- hashnode.com //main domain
sunilkumar.hashnode.dev //sub domain like that

we have personal access token to access particular details of a user and later we need to check like what are available domains on the user and we need to take which domain you need to install like that

by using workers how can i achieve this problem .

can anyone help me out the best way to achieve and also some insights and resources

@andrew | as1003

mindermondo•2/1/24, 1:08 PM

Hi.

So, I have used the default workers example for caching POST request: https://developers.cloudflare.com/workers/examples/cache-post-request

The scenario is the following:

User lands on the page and the POST request to the endpoint is made via XHR (AJAX) call. The
```
Cf-Cache-Status
```
```
Cf-Cache-Status
```
is
```
DYNAMIC
```
```
DYNAMIC
```
Same user hits this endpoint with the same payload and CF returns the cached result. The
```
Cf-Cache-Status
```
```
Cf-Cache-Status
```
is
```
HIT
```
```
HIT
```
When another user from a different device hits the same endpoint, CF still hits the origin.

How can I serve the same cached response to all users instead of only the one that's requesting the cached URI (endpoint)?

Cache POST requests · Cloudflare Workers docs

Documentation for Cloudflare Workers, a serverless execution environment that allows you to create entirely new applications or augment existing ones …

MaxMax•2/1/24, 1:13 PM

This may be a stupid question but how do I find out if my worker runs terminate early? I had issues with some code only being executed partly but I see no indications of that in logs

MMaxMax This may be a stupid question but how do I find out if my worker runs terminate ...

Hello, I’m Allie!OP•2/1/24, 1:28 PM

Is the event you are looking at an HTTP-event, or something else?

HHello, I’m Allie!Is the event you are looking at an HTTP-event, or something else?

MaxMax•2/1/24, 1:33 PM

It's a sveltekit application and more specifically a form submission which is processed serverside on +page.server.svelte.
The +page.server.svelte code is executed in a cloudflare worker

There I do 2 supabase DB requests + 2 other API calls to some email api

MMaxMax It's a sveltekit application and more specifically a form submission which is pr...

Hello, I’m Allie!OP•2/1/24, 1:36 PM

If you don’t use waitUntil, then as long as you receive a response, the Worker will have completed its task

HHello, I’m Allie!If you don’t use waitUntil, then as long as you receive a response, the Worker w...

MaxMax•2/1/24, 1:43 PM

I don't use waitUntil. The thing is I could not reproduce the issue yet when I had logs trailing with wrangler. The only thing I see is that the last API call did not happen. But is there any way to see this in the cloudflare logs to be certain this is actually the issue?

MMaxMax I don't use waitUntil. The thing is I could not reproduce the issue yet when I h...

Hello, I’m Allie!OP•2/1/24, 1:50 PM

Does it happen if you run it locally with wrangler?

Hello, I’m Allie!OP•2/1/24, 1:51 PM

You could also log the API response to see that it does go through

CCyb3r-Jak3 What do you mean by force? If you set it then it should be on. You can’t force a...

dave•2/1/24, 2:40 PM

I wanted to put the Worker in the US region so I wouldn't get billed for non-US traffic from Google Cloud Run lol

Though note that your Worker cannot do IO in startup mode

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