hey fedizens, i built something useless!
it shows you the list of fediverse instances that fetched the link (only mastodon and pleroma supported for now). you can generate your own link and post it, too.
@leip4Ier interesting thing you made. would i be wrong to assume it can theoretically be used to find non-announced instance blocks or do i misunderstand something here
@gaige i don't think it can, you'd have to somehow make sure your instance federates well with everyone (as in, there're no instances it doesn't know, there're no firewalls on its way, etc), and that none of the instances disable prefetcher.
@leip4Ier I wonder what kind of possibilities this can give, let’s say if it was adopted by blogs, news websites and so on.
Some kind of analytics I guess.
@a1batross well, it's just bots loading the page, i don't think this data can be used anyhow. you can learn when someone posts a link to e. g. an article on fediverse, but only once, after that you won't be able to tell new and old fetches apart.
whoa, it gets much more interesting with html post support!
@leip4Ier I randomly remembered this post and thought: why couldn't *this* be used to aggregate *active* instances?
It's pretty non-invasive since those instances choose if they want to be discovered (via fetching the link) or not.
You have the code for this public?
@indirection for stats, there's some mastodon api endpoint that returns them. i don't know how instance discovery works though. maybe it federates with other instances itself or uses some plugin to retrieve federation data from an existing instance?
@indirection on the about page,
> Contains an embedded Pleroma instance
i think this is how (additionally to manual entry) it does instance discovery
@leip4Ier I'm doubtful it uses "more efficient algorithms".
Yours may be an experiment but I think it's worth noting that you "passively" discover instances, rather than explicitly. fediverse.network even has an issue which says "crawl private instances less".
A Mastodon instance for info/cyber security-minded people.