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Comment by ssss11 | Hacker News Reader

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ssss11

Title doesn’t match the article

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Which begs the question: if the link isn't even to the original article, why is this being upvoted to the front page?

True, thanks. Will repost with the correct URL

Strange. HN seems to automatically change the URL when I post it.

This is the correct one https://kk.org/thetechnium/class-1-class-2-problems/

But every time I try to post it, it changes automatically to kk.org once posted.

HN tries to use canonical addresses. In the page source two canonical addresses are provided, the first is:

  <link itemprop="url" rel="canonical" href="http://kk.org">

And the second is the correct one:

  <link rel='canonical' href='https://kk.org/thetechnium/class-1-class-2-problems/' />

I'm imagining HN takes the first, always, and doesn't use any extra logic to try and discern (when there are multiple) which should be used.

Hmm that's a new one. Anyone know how to figure out which canonical URL should be used?

there's some useful stuff that pops up if you google 'itemprop' and 'canonical' but the rel-and-itemprop-at-once thing seems to be out of spec

https://html.spec.whatwg.org/multipage/semantics.html#the-li...

Doesn't really help too much with which one is the url to use but the link rel one is more righteous.

You're right! Even I tried to post it. This is what I observed:

1. After posting, I'm redirect to https://news.ycombinator.com/newest where the link works 2. I click to open the discussion, now on this page link no longer works 3. Going back to /newest, the link no longer works!

looks like a class 1 problem

I emailed the HN team and asked if they can fix it manually, since this submission now unexpectedly ended up on the frontpage.

Fixed now. Sorry. Thanks all!

Wow that seems odd!

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