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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://fietkau.social/users/julian/statuses/113398348730543977">Julian Fietkau (julian@fietkau.social)'s status on Thursday, 31-Oct-2024 06:39:10 JST</a><a href="https://fietkau.social/@julian" title="julian@fietkau.social"><img src="https://gnusocial.jp/avatar/77862-48-20230526103145.webp" width="48" height="48" alt="Julian Fietkau" style="position: absolute; left: 0; top: 0;">Julian Fietkau</a><div><a href="https://gnusocial.jp/notice/7636146" rel="in-reply-to">in reply to</a><ul><li></ul></div></section><article><p><a href="https://digitalcourage.social/@mro">@mro</a> You do a WebFinger request on the AP host domain, and its response will give you a subject with the correct handle domain. See for example this account: <a href="https://toot.kif.rocks/@team" rel="nofollow noreferrer">https://toot.kif.rocks/@team</a> and its WebFinger response: <a href="https://toot.kif.rocks/.well-known/webfinger?resource=acct:team@toot.kif.rocks" rel="nofollow noreferrer">https://toot.kif.rocks/.well-known/webfinger?resource=acct:team@toot.kif.rocks</a> This is a Mastodon split-domain setup.</p><p>The process is described here: <a href="https://www.w3.org/community/reports/socialcg/CG-FINAL-apwf-20240608/#reverse-discovery" rel="nofollow noreferrer">https://www.w3.org/community/reports/socialcg/CG-FINAL-apwf-20240608/#reverse-discovery</a> (step 4 is important for this)</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/3907390#notice-7636147">In conversation</a><time datetime="2024-10-31T06:39:10+09:00" title="Thursday, 31-Oct-2024 06:39:10 JST">about 22 days ago</time> <span>from <span><a href="https://fietkau.social/@julian/113398348730543977" rel="external" title="Sent from fietkau.social via ActivityPub">fietkau.social</a></span></span><a href="https://fietkau.social/@julian/113398348730543977">permalink</a><h4>Attachments</h4><ol><li><article><header><div>No result found on File_thumbnail lookup.</div><h5><a href="https://www.w3.org/community/reports/socialcg/CG-FINAL-apwf-20240608/#reverse-discovery">ActivityPub and WebFinger</a></h5><div></div></header><div>Identifiers in ActivityPub tend to be HTTPS URIs. The use of WebFinger (as defined in [RFC7033]) allows for discovery of an actor's identifier given a username and a hostname, which may be more socially salient or otherwise easier to communicate across various contexts and media. The username and hostname are resolved at the WebFinger endpoint of the hostname in order to discover a link to an actor associated with the user's account, and that actor similarly can be back-linked to the username and hostname.</div><footer></footer></article></li><li><article><header><div>Domain not in remote thumbnail source whitelist: toot.kif.rocks</div><h5><a href="https://toot.kif.rocks/@team">toot.kif.rocks Team (@team@kif.rocks)</a></h5><div></div></header><div>25 Beiträge, 0 Folge ich, 95 Follower · Follow this account to get notifications about maintenances and updates for toot.kif.rocks</div><footer></footer></article></li><li><label><a rel="external" href="https://gnusocial.jp/attachment/3377847">Untitled attachment</a></label><br></li></ol></footer></blockquote>

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Julian Fietkau (julian@fietkau.social)'s status on Thursday, 31-Oct-2024 06:39:10 JSTJulian Fietkau
in reply to
- Marcus Rohrmoser 🌻
@mro You do a WebFinger request on the AP host domain, and its response will give you a subject with the correct handle domain. See for example this account: https://toot.kif.rocks/@team and its WebFinger response: https://toot.kif.rocks/.well-known/webfinger?resource=acct:team@toot.kif.rocks This is a Mastodon split-domain setup.
The process is described here: https://www.w3.org/community/reports/socialcg/CG-FINAL-apwf-20240608/#reverse-discovery (step 4 is important for this)
In conversationabout 22 days ago from fietkau.socialpermalink
Attachments
1. No result found on File_thumbnail lookup.
  ActivityPub and WebFinger
  Identifiers in ActivityPub tend to be HTTPS URIs. The use of WebFinger (as defined in [RFC7033]) allows for discovery of an actor's identifier given a username and a hostname, which may be more socially salient or otherwise easier to communicate across various contexts and media. The username and hostname are resolved at the WebFinger endpoint of the hostname in order to discover a link to an actor associated with the user's account, and that actor similarly can be back-linked to the username and hostname.
2. Domain not in remote thumbnail source whitelist: toot.kif.rocks
  toot.kif.rocks Team (@team@kif.rocks)
  25 Beiträge, 0 Folge ich, 95 Follower · Follow this account to get notifications about maintenances and updates for toot.kif.rocks
3. Untitled attachment

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