1 use activitypub_federation::{
3 fetch::webfinger::{extract_webfinger_name, Webfinger, WebfingerLink},
5 use actix_web::{web, web::Query, HttpResponse};
6 use lemmy_api_common::context::LemmyContext;
8 source::{community::Community, person::Person},
11 use lemmy_utils::{cache_header::cache_3days, error::LemmyError};
12 use serde::Deserialize;
13 use std::collections::HashMap;
16 #[derive(Deserialize)]
21 pub fn config(cfg: &mut web::ServiceConfig) {
23 ".well-known/webfinger",
24 web::get().to(get_webfinger_response).wrap(cache_3days()),
28 /// Responds to webfinger requests of the following format. There isn't any real documentation for
29 /// this, but it described in this blog post:
30 /// https://mastodon.social/.well-known/webfinger?resource=acct:gargron@mastodon.social
32 /// You can also view the webfinger response that Mastodon sends:
33 /// https://radical.town/.well-known/webfinger?resource=acct:felix@radical.town
34 async fn get_webfinger_response(
36 context: Data<LemmyContext>,
37 ) -> Result<HttpResponse, LemmyError> {
38 let name = extract_webfinger_name(&info.resource, &context)?;
40 let name_ = name.clone();
41 let user_id: Option<Url> = Person::read_from_name(&mut context.pool(), &name_, false)
44 .map(|c| c.actor_id.into());
45 let community_id: Option<Url> = Community::read_from_name(&mut context.pool(), &name, false)
48 .map(|c| c.actor_id.into());
50 // Mastodon seems to prioritize the last webfinger item in case of duplicates. Put
51 // community last so that it gets prioritized. For Lemmy the order doesnt matter.
53 webfinger_link_for_actor(user_id, "Person"),
54 webfinger_link_for_actor(community_id, "Group"),
60 let json = Webfinger {
61 subject: info.resource.clone(),
66 Ok(HttpResponse::Ok().json(json))
69 fn webfinger_link_for_actor(url: Option<Url>, kind: &str) -> Vec<WebfingerLink> {
70 if let Some(url) = url {
71 let mut properties = HashMap::new();
73 "https://www.w3.org/ns/activitystreams#type"
80 rel: Some("http://webfinger.net/rel/profile-page".to_string()),
81 kind: Some("text/html".to_string()),
82 href: Some(url.clone()),
86 rel: Some("self".to_string()),
87 kind: Some("application/activity+json".to_string()),