lemmy/server/src/apub/mod.rs

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pub mod activities;
pub mod comment;
pub mod community;
pub mod community_inbox;
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pub mod extensions;
pub mod fetcher;
pub mod post;
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pub mod private_message;
pub mod shared_inbox;
pub mod user;
pub mod user_inbox;
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use crate::{
apub::extensions::{
group_extensions::GroupExtension,
page_extension::PageExtension,
signatures::{PublicKey, PublicKeyExtension},
},
blocking,
request::{retry, RecvError},
routes::webfinger::WebFingerResponse,
DbPool,
LemmyError,
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};
use activitystreams::object::Page;
use activitystreams_ext::{Ext1, Ext2};
use activitystreams_new::{
activity::Follow,
actor::{ApActor, Group, Person},
object::Tombstone,
prelude::*,
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};
use actix_web::{body::Body, client::Client, HttpResponse};
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use chrono::NaiveDateTime;
use failure::_core::fmt::Debug;
use lemmy_db::{activity::do_insert_activity, user::User_};
use lemmy_utils::{convert_datetime, get_apub_protocol_string, settings::Settings, MentionData};
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use log::debug;
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use serde::Serialize;
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use url::Url;
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type GroupExt = Ext2<ApActor<Group>, GroupExtension, PublicKeyExtension>;
type PersonExt = Ext1<ApActor<Person>, PublicKeyExtension>;
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type PageExt = Ext1<Page, PageExtension>;
pub static APUB_JSON_CONTENT_TYPE: &str = "application/activity+json";
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/// Convert the data to json and turn it into an HTTP Response with the correct ActivityPub
/// headers.
fn create_apub_response<T>(data: &T) -> HttpResponse<Body>
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where
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T: Serialize,
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{
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HttpResponse::Ok()
.content_type(APUB_JSON_CONTENT_TYPE)
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.json(data)
}
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fn create_apub_tombstone_response<T>(data: &T) -> HttpResponse<Body>
where
T: Serialize,
{
HttpResponse::Gone()
.content_type(APUB_JSON_CONTENT_TYPE)
.json(data)
}
// Checks if the ID has a valid format, correct scheme, and is in the allowed instance list.
fn is_apub_id_valid(apub_id: &Url) -> bool {
debug!("Checking {}", apub_id);
if apub_id.scheme() != get_apub_protocol_string() {
debug!("invalid scheme: {:?}", apub_id.scheme());
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return false;
}
let allowed_instances: Vec<String> = Settings::get()
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.federation
.allowed_instances
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.split(',')
.map(|d| d.to_string())
.collect();
match apub_id.domain() {
Some(d) => {
let contains = allowed_instances.contains(&d.to_owned());
if !contains {
debug!("{} not in {:?}", d, allowed_instances);
}
contains
}
None => {
debug!("missing domain");
false
}
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}
}
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#[async_trait::async_trait(?Send)]
pub trait ToApub {
type Response;
async fn to_apub(&self, pool: &DbPool) -> Result<Self::Response, LemmyError>;
fn to_tombstone(&self) -> Result<Tombstone, LemmyError>;
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}
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/// Updated is actually the deletion time
fn create_tombstone(
deleted: bool,
object_id: &str,
updated: Option<NaiveDateTime>,
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former_type: String,
) -> Result<Tombstone, LemmyError> {
if deleted {
if let Some(updated) = updated {
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let mut tombstone = Tombstone::new();
tombstone.set_id(object_id.parse()?);
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tombstone.set_former_type(former_type);
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tombstone.set_deleted(convert_datetime(updated).into());
Ok(tombstone)
} else {
Err(format_err!("Cant convert to tombstone because updated time was None.").into())
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}
} else {
Err(format_err!("Cant convert object to tombstone if it wasnt deleted").into())
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}
}
#[async_trait::async_trait(?Send)]
pub trait FromApub {
type ApubType;
async fn from_apub(
apub: &mut Self::ApubType,
client: &Client,
pool: &DbPool,
) -> Result<Self, LemmyError>
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where
Self: Sized;
}
#[async_trait::async_trait(?Send)]
pub trait ApubObjectType {
async fn send_create(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_update(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_delete(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_undo_delete(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_remove(
&self,
mod_: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_undo_remove(
&self,
mod_: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
}
#[async_trait::async_trait(?Send)]
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pub trait ApubLikeableType {
async fn send_like(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_dislike(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_undo_like(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
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}
pub fn get_shared_inbox(actor_id: &str) -> String {
let url = Url::parse(actor_id).unwrap();
format!(
"{}://{}{}/inbox",
&url.scheme(),
&url.host_str().unwrap(),
if let Some(port) = url.port() {
format!(":{}", port)
} else {
"".to_string()
},
)
}
#[async_trait::async_trait(?Send)]
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pub trait ActorType {
fn actor_id(&self) -> String;
fn public_key(&self) -> String;
fn private_key(&self) -> String;
// These two have default impls, since currently a community can't follow anything,
// and a user can't be followed (yet)
#[allow(unused_variables)]
async fn send_follow(
&self,
follow_actor_id: &str,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_unfollow(
&self,
follow_actor_id: &str,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
#[allow(unused_variables)]
async fn send_accept_follow(
&self,
follow: &Follow,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_delete(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_undo_delete(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_remove(
&self,
mod_: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
async fn send_undo_remove(
&self,
mod_: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError>;
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/// For a given community, returns the inboxes of all followers.
async fn get_follower_inboxes(&self, pool: &DbPool) -> Result<Vec<String>, LemmyError>;
// TODO move these to the db rows
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fn get_inbox_url(&self) -> String {
format!("{}/inbox", &self.actor_id())
}
fn get_shared_inbox_url(&self) -> String {
get_shared_inbox(&self.actor_id())
}
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fn get_outbox_url(&self) -> String {
format!("{}/outbox", &self.actor_id())
}
fn get_followers_url(&self) -> String {
format!("{}/followers", &self.actor_id())
}
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fn get_following_url(&self) -> String {
format!("{}/following", &self.actor_id())
}
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fn get_liked_url(&self) -> String {
format!("{}/liked", &self.actor_id())
}
fn get_public_key_ext(&self) -> PublicKeyExtension {
PublicKey {
id: format!("{}#main-key", self.actor_id()),
owner: self.actor_id(),
public_key_pem: self.public_key(),
}
.to_ext()
}
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}
pub async fn fetch_webfinger_url(
mention: &MentionData,
client: &Client,
) -> Result<String, LemmyError> {
let fetch_url = format!(
"{}://{}/.well-known/webfinger?resource=acct:{}@{}",
get_apub_protocol_string(),
mention.domain,
mention.name,
mention.domain
);
debug!("Fetching webfinger url: {}", &fetch_url);
let mut response = retry(|| client.get(&fetch_url).send()).await?;
let res: WebFingerResponse = response
.json()
.await
.map_err(|e| RecvError(e.to_string()))?;
let link = res
.links
.iter()
.find(|l| l.type_.eq(&Some("application/activity+json".to_string())))
.ok_or_else(|| format_err!("No application/activity+json link found."))?;
link
.href
.to_owned()
.ok_or_else(|| format_err!("No href found.").into())
}
pub async fn insert_activity<T>(
user_id: i32,
data: T,
local: bool,
pool: &DbPool,
) -> Result<(), LemmyError>
where
T: Serialize + Debug + Send + 'static,
{
blocking(pool, move |conn| {
do_insert_activity(conn, user_id, &data, local)
})
.await??;
Ok(())
}