WebFinger - Resource Account Lookup

[benrick]

Mastodon uses Webfinger to find information from the server where someone's account is located. To do this, it uses the Webfinger spec, because ActivityPub alone doesn't have this lookup. We'll need to support requests like this:

https://our.devchatter.com/.well-known/webfinger?resource=acct:brendoneus@our.devchatter.com

{
    "subject":"acct:brendoneus@our.devchatter.com",
    "aliases":[
        "https://our.devchatter.com/@brendoneus",
        "https://our.devchatter.com/users/brendoneus"
    ],
    "links":[
        {
            "rel":"http://webfinger.net/rel/profile-page",
            "type":"text/html",
            "href":"https://our.devchatter.com/@brendoneus"
        },
        {
            "rel":"self",
            "type":"application/activity+json",
            "href":"https://our.devchatter.com/users/brendoneus"
        },
        {
            "rel":"http://ostatus.org/schema/1.0/subscribe",
            "template":"https://our.devchatter.com/authorize_interaction?uri={uri}"
        }
    ]
}

Mastodon Docs on Webfinger Usage: https://docs.joinmastodon.org/spec/webfinger/
Official Webfinger Site: https://webfinger.net/