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activitypub profile discovery #204

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donpdonp opened this Issue Apr 24, 2017 · 5 comments

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donpdonp commented Apr 24, 2017

I'm trying to piece together the activitystream steps and I havent seen a spec for finding someone's "Person" object from a homepage url. I looked at an existing identifier I had on my homepage

<link rel="alternate" type="application/ld+json" href="webid.json"/>

and fixed it up to look more like something an activitypub service might discover.

<link rel="me" type='application/ld+json; profile="https://www.w3.org/ns/activitystreams"' href="as-person.json"/>

I'm not sure if the profile part of the mime-type belongs in the type field. I put indieweb's "me" rel in place of "alternate" because its friendlier. I dont expect anything to consume this tag today, I just added it to my site (donp.org) to see how it might work.

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csarven commented Apr 25, 2017

Wouldn't the relation be along the lines of primaryTopic/creator/maker?

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donpdonp commented Apr 25, 2017

there was some discussion on the w3c irc meeting today
https://socialwg.indiewebcamp.com/irc/social/2017-04-25#t1493136042420

with the conclusion being

<link rel="alternate" type="application/activity+json" href="as-person.json"/>

would be an acceptable tag.

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cwebber commented Apr 25, 2017

I think the conversation from today is that those are acceptable link relations and are informative / welcome for people to put places. Our official way of moving from a link describing an actor to their profile is via content negotiation though. That said, a client might even know how to look up a profile based on finding that on a uri, but we aren't putting that in the official spec, doing so would be an extension... but maybe defining such an extension would be good work to do through the community group.

Does that answer things @donpdonp? Thanks! :)

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donpdonp commented Apr 25, 2017

given "donp.org", and needing a json Person document for activitypub operations, doing a GET with Accept: application/activity+json seems ok as one way to get this document.

As a recommendation for someone trying to add an activitystream identitiy to their website, using content negotiation seems like a rocky path. The average php hosting service for example, does not have a paradigm in its UI for a document per mime type. Even with full control of an nginx config, its an unusual kind of configuration entry.

Having link rel="alternative" as a fallback is a great alternative. Anyone who knows how to edit html will be able to add an extra tag linking to the url of the json document for that person.

@donpdonp donpdonp closed this Apr 25, 2017

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strugee commented Apr 25, 2017

I've added this to the list of possible AP extensions: https://www.w3.org/wiki/ActivityPub_extensions

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