lemmy/server/src/routes/webfinger.rs

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3.6 KiB
Rust
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use crate::{
db::{community::Community, user::User_},
routes::DbPoolParam,
Settings,
};
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use actix_web::{error::ErrorBadRequest, web::Query, *};
use regex::Regex;
use serde::{Deserialize, Serialize};
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#[derive(Deserialize)]
pub struct Params {
resource: String,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct WebFingerResponse {
pub subject: String,
pub aliases: Vec<String>,
pub links: Vec<WebFingerLink>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct WebFingerLink {
pub rel: Option<String>,
#[serde(rename(serialize = "type", deserialize = "type"))]
pub type_: Option<String>,
pub href: Option<String>,
#[serde(skip_serializing_if = "Option::is_none")]
pub template: Option<String>,
}
pub fn config(cfg: &mut web::ServiceConfig) {
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if Settings::get().federation.enabled {
cfg.route(
".well-known/webfinger",
web::get().to(get_webfinger_response),
);
}
}
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lazy_static! {
static ref WEBFINGER_COMMUNITY_REGEX: Regex = Regex::new(&format!(
"^group:([a-z0-9_]{{3, 20}})@{}$",
Settings::get().hostname
))
.unwrap();
static ref WEBFINGER_USER_REGEX: Regex = Regex::new(&format!(
"^acct:([a-z0-9_]{{3, 20}})@{}$",
Settings::get().hostname
))
.unwrap();
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}
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/// 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<Params>,
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db: DbPoolParam,
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) -> Result<HttpResponse, Error> {
let res = web::block(move || {
let conn = db.get()?;
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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)
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.map(|c| c.get(1))
.flatten();
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let url = if let Some(community_name) = community_regex_parsed {
// Make sure the requested community exists.
let community = match Community::read_from_name(&conn, &community_name.as_str()) {
Ok(o) => o,
Err(_) => return Err(format_err!("not_found")),
};
community.actor_id
} else if let Some(user_name) = user_regex_parsed {
// Make sure the requested user exists.
let user = match User_::read_from_name(&conn, &user_name.as_str()) {
Ok(o) => o,
Err(_) => return Err(format_err!("not_found")),
};
user.actor_id
} else {
return Err(format_err!("not_found"));
};
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let wf_res = 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(wf_res)
})
.await
.map(|json| HttpResponse::Ok().json(json))
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.map_err(ErrorBadRequest)?;
Ok(res)
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}