apignotti Comments - Answer Overflow

Ok, thanks for your help in clarifying the problem. Hopefully cloudflare engineers will take the issue seriously thanks to the data we have gathered so far.

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CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

To the best of my understanding this is also indeed a fairly serious cache problem. I think this is also connected to another issue I mentioned above that also only happens when the data is first loaded from the origin. https://discord.com/channels/595317990191398933/1344748548247392387/1345048200503103518

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

Can you clarify which ones have the header?

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

The one bybassing the cache work reliably in my tests so far

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

Yep, I think I have a working setup. URLs starting with https://d3415aa6bfa4.leaningtech.com/jce.jar (so to include any query string) now bypass the cache I have also added another copy of the file jce2.jar without this rule for comparison.

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

(Working on it)

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

It's a sensible design

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

It's important to note that the upstream server never actually receives byte ranges headers, Cloudflare will download the whole resource and then provide the range to the user.

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

It's an interesting discovery, but I don't see what that would mean

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

Using node is good approach to get rid of the CORS issue, nice idea 👍

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

This seem to suggest the offset is actually random or garbage data coming from somewhere

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

https://d3415aa6bfa4.leaningtech.com/jce.jar Is my second test URL. This one is not CORS-enabled though, so testing from Chrome is not as straightforward. I have done my testing by disabling CORS checks at the browser level. This domain points to a completely different upstream server.

59 replies

CDCloudflare Developers

•Created by apignotti on 2/27/2025 in #general-help

CDN-introduced data corruption for 206 responses

I might be the same for the same URL, I don't have strong data about this.

59 replies

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