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Mention YT video and that math challenge isn't cached

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2022-05-21 20:29:48 -05:00
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content/blog/discord-sex-hack/index.md
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@@ -257,10 +257,28 @@ instead return a randomized math challenge:
{{< figure src="math-challenge" >}}
What's special is that the math challenge is [set to not be
cached][math-challenge-caching].
[math-challenge-caching]: https://github.com/rebane2001/txnor-server/blob/26c7c279b0b4668c8a3b061692d83c507aeac7c5/sex.py#L137
How it works is that when each person's Discord client sends a request to the
Discord CDN to get the image, the client caches that image. That means each
client will see the same challenge problem, even if the user restarts the
client. But separate clients will not have it cached, so they'll request it
again themselves, and different numbers will be generated.
## Discord sex is open source
Rebane revealed in a [comment on this post](#isso-16) that the
Thanks to a [comment from Rebane on this post](#isso-16), I now know that the
server running on `txnor.com` is open source. See
[rebane2001/txnor-server][txnor-server-github].
[txnor-server-github]: https://github.com/rebane2001/txnor-server
## YouTube video
Rebane also [made a YouTube video][txnor-youtube-video] about this trick. Make
sure to check it out too!
[txnor-youtube-video]: https://www.youtube.com/watch?v=km8CR-fdB7o