use actix_web::{error::ErrorBadRequest, web::Query, *}; use anyhow::anyhow; use lemmy_db::{community::Community, user::User_}; use lemmy_structs::{blocking, WebFingerLink, WebFingerResponse}; use lemmy_utils::{ settings::Settings, LemmyError, WEBFINGER_COMMUNITY_REGEX, WEBFINGER_USER_REGEX, }; use lemmy_websocket::LemmyContext; use serde::Deserialize; #[derive(Deserialize)] pub struct Params { resource: String, } pub fn config(cfg: &mut web::ServiceConfig) { if Settings::get().federation.enabled { cfg.route( ".well-known/webfinger", web::get().to(get_webfinger_response), ); } } /// Responds to webfinger requests of the following format. There isn't any real documentation for /// this, but it described in this blog post: /// https://mastodon.social/.well-known/webfinger?resource=acct:gargron@mastodon.social /// /// You can also view the webfinger response that Mastodon sends: /// https://radical.town/.well-known/webfinger?resource=acct:felix@radical.town async fn get_webfinger_response( info: Query, context: web::Data, ) -> Result { let community_regex_parsed = WEBFINGER_COMMUNITY_REGEX .captures(&info.resource) .map(|c| c.get(1)) .flatten(); let user_regex_parsed = WEBFINGER_USER_REGEX .captures(&info.resource) .map(|c| c.get(1)) .flatten(); let url = if let Some(community_name) = community_regex_parsed { let community_name = community_name.as_str().to_owned(); // Make sure the requested community exists. blocking(context.pool(), move |conn| { Community::read_from_name(conn, &community_name) }) .await? .map_err(|_| ErrorBadRequest(LemmyError::from(anyhow!("not_found"))))? .actor_id } else if let Some(user_name) = user_regex_parsed { let user_name = user_name.as_str().to_owned(); // Make sure the requested user exists. blocking(context.pool(), move |conn| { User_::read_from_name(conn, &user_name) }) .await? .map_err(|_| ErrorBadRequest(LemmyError::from(anyhow!("not_found"))))? .actor_id } else { return Err(ErrorBadRequest(LemmyError::from(anyhow!("not_found")))); }; let json = WebFingerResponse { subject: info.resource.to_owned(), aliases: vec![url.to_owned()], links: vec![ WebFingerLink { rel: Some("http://webfinger.net/rel/profile-page".to_string()), type_: Some("text/html".to_string()), href: Some(url.to_owned()), template: None, }, WebFingerLink { rel: Some("self".to_string()), type_: Some("application/activity+json".to_string()), href: Some(url), template: None, }, // TODO: this also needs to return the subscribe link once that's implemented //{ // "rel": "http://ostatus.org/schema/1.0/subscribe", // "template": "https://my_instance.com/authorize_interaction?uri={uri}" //} ], }; Ok(HttpResponse::Ok().json(json)) }