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Clarify a few details about how math challenge works

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2024-06-28 16:37:15 -05:00
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content/blog/discord-sex-hack/index.md
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@@ -262,16 +262,22 @@ sequence, it would total 6970.
### Math challenge
Any URL that matches [this regular expression][math-challenge-regex] will
instead return a randomized math challenge:
instead return a randomized math challenge. This means the URL can be
`https://txnor.com/` followed by either `math`, `math_challenge`, or
`mathchallenge`, a single optional slash, and then any text that's made up of
only letters, numbers, underscores or hyphens.
[math-challenge-regex]: https://regex101.com/r/ddEkML/1
{{< figure src="math-challenge" >}}
What's special is that the math challenge is [set to not be
cached][math-challenge-caching].
cached][math-challenge-caching]. That means that it
*should*[^should-different-question] give everyone a different question.
[math-challenge-caching]: https://github.com/rebane2001/txnor-server/blob/26c7c279b0b4668c8a3b061692d83c507aeac7c5/sex.py#L137
[^should-different-question]: The caching behavior seems to be inconsistent, so
sometimes it does end up giving multiple people the same question.
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