I’m trying to figure out how to get the comments of a post given a link to it using ActivityPub.
Based on reading the ActivityPub spec, I thought comments were federated via the replies key of the ActivityPub Object.
This works for Mastodon posts, but not for Lemmy (nor Pleroma). As an example
curl -H "Accept: application/activity+json" https://lemmy.my.id/post/79514 | jq
doesn’t contain a replies key. Yet the comments are federated to Mastodon somehow.
What is going on? How can I get the comment?
AFAIK, you can’t load comments on posts manually. You only get comments that are pushed to your instance after someone has subscribed to the community containing the post.
Unfortunately I think you’re right. I tested it by trying to load the Lemmy post up on a couple of single-user Mastodon instances, and they failed to load it.
It looks like only Mastodon and PeerTube and maybe a couple others list replies alongside the post. It would be nice if more did because I’m relying on the feature for this project of mine: https://github.com/BentonEdmondson/servitor
