88 lines
2.4 KiB
Rust
88 lines
2.4 KiB
Rust
use actix_web::{web, web::Query, HttpResponse};
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use anyhow::Context;
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use lemmy_api_common::context::LemmyContext;
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use lemmy_db_schema::{
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source::{community::Community, person::Person},
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traits::ApubActor,
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};
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use lemmy_utils::{error::LemmyError, location_info, WebfingerLink, WebfingerResponse};
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use serde::Deserialize;
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use url::Url;
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#[derive(Deserialize)]
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struct Params {
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resource: String,
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}
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pub fn config(cfg: &mut web::ServiceConfig) {
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cfg.route(
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".well-known/webfinger",
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web::get().to(get_webfinger_response),
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);
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}
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/// Responds to webfinger requests of the following format. There isn't any real documentation for
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/// this, but it described in this blog post:
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/// https://mastodon.social/.well-known/webfinger?resource=acct:gargron@mastodon.social
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///
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/// You can also view the webfinger response that Mastodon sends:
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/// https://radical.town/.well-known/webfinger?resource=acct:felix@radical.town
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async fn get_webfinger_response(
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info: Query<Params>,
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context: web::Data<LemmyContext>,
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) -> Result<HttpResponse, LemmyError> {
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let name = context
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.settings()
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.webfinger_regex()
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.captures(&info.resource)
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.and_then(|c| c.get(1))
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.context(location_info!())?
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.as_str()
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.to_string();
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let name_ = name.clone();
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let user_id: Option<Url> = Person::read_from_name(context.pool(), &name_, false)
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.await
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.ok()
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.map(|c| c.actor_id.into());
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let community_id: Option<Url> = Community::read_from_name(context.pool(), &name, false)
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.await
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.ok()
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.map(|c| c.actor_id.into());
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// Mastodon seems to prioritize the last webfinger item in case of duplicates. Put
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// community last so that it gets prioritized. For Lemmy the order doesnt matter.
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let links = vec![
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webfinger_link_for_actor(user_id),
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webfinger_link_for_actor(community_id),
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]
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.into_iter()
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.flatten()
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.collect();
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let json = WebfingerResponse {
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subject: info.resource.clone(),
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links,
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};
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Ok(HttpResponse::Ok().json(json))
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}
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fn webfinger_link_for_actor(url: Option<Url>) -> Vec<WebfingerLink> {
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if let Some(url) = url {
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vec![
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WebfingerLink {
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rel: Some("http://webfinger.net/rel/profile-page".to_string()),
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kind: Some("text/html".to_string()),
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href: Some(url.clone()),
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},
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WebfingerLink {
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rel: Some("self".to_string()),
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kind: Some("application/activity+json".to_string()),
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href: Some(url),
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},
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]
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} else {
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vec![]
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}
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}
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