Same with user uploaded .zip files… if the files are supposed to be in a specific hierarchy in the a

Same with user uploaded .zip files… if the files are supposed to be in a specific hierarchy in the archive, check that. Obviously you can’t check everything, but a lot you can.

Ddigitalpoint Same with user uploaded .zip files… if the files are supposed to be in a specifi...

Chaika•8/22/24, 4:52 PM

yea, sometimes can do it client side too. I have something where users pick images, the client-side code checks image, and then they can pick to upload directly to bucket. It's b2b software so I really doubt someone would try to jump the check but even if they do it's on them, only they can see their own messed up imgs lol, just want to have sane max upload limits so they can't say "this 1gb file is totally an image"

Barry_Based_Benson•8/22/24, 4:54 PM

And presigned urls make size validation easy

Chaika•8/22/24, 4:56 PM

well you clamp that down to reasonable limits lol

Chaika•8/22/24, 4:57 PM

client says it wants to upload image, requested size 500 mb but images can be up to 25 mb, not going to return a presigned url

Chaika•8/22/24, 4:59 PM

then you have rate limits on the presign endpoint + a short expiration on the presigned sig

Chaika•8/22/24, 4:59 PM

whatever makes sense for your app? This isn't something that proxying it through your backend would magically solve

Chaika•8/22/24, 5:00 PM

ok..?

Barry_Based_Benson•8/22/24, 5:00 PM

And that's a good thing

Barry_Based_Benson•8/22/24, 5:00 PM

Don't need to set a large expiry in case a user wants to upload a large file.

Original message was deleted

Chaika•8/22/24, 5:01 PM

no because you'd have to start a new upload

Chaika•8/22/24, 5:01 PM

you can take as long as you want to upload sure, and that's fine because you're consuming r2's resources/keeping a conn open to them

Chaika•8/22/24, 5:01 PM

but once that upload is done/failed/suceeded, you try again, new sig expiration check

Chaika•8/22/24, 5:02 PM

idk if r2/s3 stuff would let you do that

Chaika•8/22/24, 5:02 PM

would have to look into it, I assume there should be some same max concurrent limit

Chaika•8/22/24, 5:03 PM

yea idk about that, would assume there's some protection there with how many people use it w/ s3 and such but would have to look into it further. At some point w/ Cf ddos prot would kick in

Chaika•8/22/24, 5:05 PM

everything behind cf cdn has automatic protection

Barry_Based_Benson•8/22/24, 5:07 PM

A few second flood of class A ops that CF can mitigate VS processing every single file on your backend.

Like I said you sacrifice some things and win others. It's a pros cons situation

Barry_Based_Benson•8/22/24, 5:07 PM

I'd rather go the presigned url route in this case

Chaika•8/22/24, 5:11 PM

You could sign If-None-Match/If-Unmodified-Since, not sure if that would save you the Class A though. Would have to test if you can do multiple presigned uploads at once

Original message was deleted

Chaika•8/22/24, 5:11 PM

do you know if it lets you actually do more then one at once?

Original message was deleted

Chaika•8/22/24, 5:11 PM

bandwidth is expensive to be proxying it all through another server

Chaika•8/22/24, 5:12 PM

not something I'd want a business to depend on

Chaika•8/22/24, 5:12 PM

lots of extra work for lb/reliability/etc

Barry_Based_Benson•8/22/24, 5:13 PM

You seem very security conscious which is good but it should be balanced with you resources

Chaika•8/22/24, 5:13 PM

lb is a decent extra cost plus maintaining/paying for all the machines

Barry_Based_Benson•8/22/24, 5:14 PM

Do you still use a lock on the door to your house? What if someone picks that? You gonna use a million different doors and locks and security systems too?

Chaika•8/22/24, 5:14 PM

I think there's security conscious and security paranoid, maybe people use presigned a bit too much but there's def lots of envs you can use them in without too much worry

Chaika•8/22/24, 5:15 PM

except doing all the work to setup a server to proxy all the uploads/check them/lb/etc is a lot of dev work vs just making a worker returning a presigned url

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dave•8/22/24, 5:15 PM

you need more dev costs to support more infra

Barry_Based_Benson•8/22/24, 5:17 PM

The more your have, logically the harder it can be to maintain

Barry_Based_Benson•8/22/24, 5:17 PM

Maybe for now they're flat

Chaika•8/22/24, 5:18 PM

I'll try later today. It has to go to the bucket/DO so I would assume it'd reject but not 100%

Barry_Based_Benson•8/22/24, 5:19 PM

Doesn't multiple putobject requests usually cause an overwrite if the object is already there anyways? Regardless of concurrency

Barry_Based_Benson•8/22/24, 5:24 PM

If its not already a feature, it would nice to put ip in the header for generating the url

Barry_Based_Benson•8/22/24, 5:25 PM

Which can limit an attack

Chaika•8/22/24, 5:27 PM

S3 API is IPv6 supported though so could send v4 to your backend and V6 to S3

Barry_Based_Benson•8/22/24, 5:27 PM

Does r2 support it?

Barry_Based_Benson•8/22/24, 5:28 PM

Cloudflare uses cf-connecting-ip right

Barry_Based_Benson•8/22/24, 5:29 PM

But would that work with a putobject presigned url

Chaika•8/22/24, 5:29 PM

By S3 API I mean r2s

Chaika•8/22/24, 5:29 PM

You could try and see lol, it might

Barry_Based_Benson•8/22/24, 5:29 PM

I might do tbh

Barry_Based_Benson•8/22/24, 5:29 PM

Thanks

Barry_Based_Benson•8/22/24, 5:55 PM

Does r2 charge for failed requests to the url?

Barry_Based_Benson•8/22/24, 5:55 PM

Or only successful ones?

Barry_Based_Benson•8/22/24, 5:56 PM

So 403 is charged?

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Aufgeladen•8/22/24, 6:14 PM

For a game launcher written in JavaScript (react electron)

Aufgeladen•8/22/24, 6:14 PM

Not anything .aufgeladen. Related

BBarry_Based_Benson @yuvraj In that case the md5 + size validation should be good enough. If a user ...

yuvraj•8/22/24, 7:14 PM

yeah this solution is perfect for my small nextjs app
btw cloudflare pages have unlimited bandwidth, I can also upload the file via the server for max security

yuvraj•8/22/24, 7:16 PM

damn, for real we get charged for 403?
I've seen the files uploaded 100%, then the 403 kicks in

Same with user uploaded .zip files… if the files are supposed to be in a specific hierarchy in the a

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