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Re:Show HN: DeepHN – Full-text search of 30M Hacker News pos... by TekMol on Tuesday April 13, 2021 @01:36PM (#26795999)
They copy the whole text of web pages that are linked in the HN posts. So totally a mass breach of copyright.

If you are afraid of being sued, you certainly should not do something like this.

On the upside, there is probably not much provable damage a publisher could ask to be repaired. So they probably are only liable to pay for the legal expenses of whoever sues them.

Re:Show HN: DeepHN – Full-text search of 30M Hacker News pos... by wolfgarbe on Tuesday April 13, 2021 @02:03PM (#26796470)
DeepHN does not copy the whole page, only the first 200 words or less. DeepHN does not copy the whole website but only a fraction of a single page of that web site. We always provide the original link. That should make it fair use. Of course we would prefer if there was a clear and concise legislation, valid in all countries, which could be followed.

We mainly surface historical content, which receives additional traffic from DeepHN, instead of taking value away from the website.

Re:Show HN: DeepHN – Full-text search of 30M Hacker News pos... by e12e on Tuesday April 13, 2021 @01:49PM (#26796258)
I copy the whole text of web pages I visit. It's not automatically breach of copyright.

That said, meaningful fulltext search will need data. But both Bing and Google crawl pages.

It's not even immediately clear that displaying a copy of a page is materially different from caching (which http do in many, many layers).

Now, if présent the text as your own - that might be a problem.

Ed: see also: archive.org.