问题
How do websites like ThePirateBay.org work? I heard that the age of trackers is pretty much over, so I guess they extract data from DHT. I wrote a simple DHT scraper, but it was pretty slow to query the servers - does TPB have its own DHT nodes they sniff on? Do they verify whether the peers actually have data?
回答1:
I'm not staff on TPB (or any other torrent index site) and have no exact information how they do it, but my best guess is that they regulary fetch a full scrape from the (working) trackers that are provided in the magnet links on the site.
Currently those are:
udp://tracker.leechers-paradise.org:6969
udp://tracker.coppersurfer.tk:6969
Looking at the trackers homepages:
http://tracker.leechers-paradise.org
http://coppersurfer.tk
Both have links to download a full scrape:
http://scrape.leechers-paradise.org/static_scrape
http://coppersurfer.tk/full_scrape_not_a_tracker.tar.gz
While it's possible to scrape the DHT, it takes large resources to do (as you have noticed), so I find it very unlikely that they do that.
Disclaimer: Those trackers don't have any (pirated) file content, are not bittorrent sites and don't have any torrent files.
来源：https://stackoverflow.com/questions/39821363/how-does-thepiratebay-know-the-number-of-seeders-for-its-torrents