mirror of
https://github.com/LemmyNet/lemmy.git
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363 lines
10 KiB
Rust
363 lines
10 KiB
Rust
#[macro_use]
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extern crate lazy_static;
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pub mod activities;
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pub mod activity_queue;
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pub mod comment;
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pub mod community;
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pub mod extensions;
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pub mod fetcher;
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pub mod inbox;
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pub mod post;
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pub mod private_message;
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pub mod user;
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use crate::extensions::{
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group_extensions::GroupExtension,
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page_extension::PageExtension,
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signatures::{PublicKey, PublicKeyExtension},
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};
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use activitystreams::{
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activity::Follow,
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actor::{ApActor, Group, Person},
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base::AsBase,
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markers::Base,
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object::{Page, Tombstone},
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prelude::*,
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};
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use activitystreams_ext::{Ext1, Ext2};
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use actix_web::{body::Body, HttpResponse};
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use anyhow::{anyhow, Context};
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use chrono::NaiveDateTime;
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use lemmy_db::{activity::do_insert_activity, user::User_, DbPool};
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use lemmy_structs::{blocking, WebFingerResponse};
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use lemmy_utils::{
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location_info,
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request::{retry, RecvError},
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settings::Settings,
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utils::{convert_datetime, MentionData},
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LemmyError,
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};
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use lemmy_websocket::LemmyContext;
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use log::debug;
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use reqwest::Client;
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use serde::Serialize;
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use url::{ParseError, Url};
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type GroupExt = Ext2<ApActor<Group>, GroupExtension, PublicKeyExtension>;
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type PersonExt = Ext1<ApActor<Person>, PublicKeyExtension>;
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type PageExt = Ext1<Page, PageExtension>;
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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
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/// headers.
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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()
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.content_type(APUB_JSON_CONTENT_TYPE)
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.json(data)
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}
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fn create_apub_tombstone_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::Gone()
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.content_type(APUB_JSON_CONTENT_TYPE)
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.json(data)
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}
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// Checks if the ID has a valid format, correct scheme, and is in the allowed instance list.
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fn check_is_apub_id_valid(apub_id: &Url) -> Result<(), LemmyError> {
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let settings = Settings::get();
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let domain = apub_id.domain().context(location_info!())?.to_string();
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let local_instance = settings
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.hostname
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.split(':')
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.collect::<Vec<&str>>()
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.first()
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.context(location_info!())?
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.to_string();
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if !settings.federation.enabled {
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return if domain == local_instance {
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Ok(())
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} else {
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Err(
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anyhow!(
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"Trying to connect with {}, but federation is disabled",
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domain
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)
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.into(),
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)
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};
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}
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if apub_id.scheme() != Settings::get().get_protocol_string() {
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return Err(anyhow!("invalid apub id scheme: {:?}", apub_id.scheme()).into());
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}
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let mut allowed_instances = Settings::get().get_allowed_instances();
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let blocked_instances = Settings::get().get_blocked_instances();
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if !allowed_instances.is_empty() {
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// need to allow this explicitly because apub activities might contain objects from our local
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// instance. split is needed to remove the port in our federation test setup.
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allowed_instances.push(local_instance);
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if allowed_instances.contains(&domain) {
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Ok(())
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} else {
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Err(anyhow!("{} not in federation allowlist", domain).into())
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}
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} else if !blocked_instances.is_empty() {
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if blocked_instances.contains(&domain) {
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Err(anyhow!("{} is in federation blocklist", domain).into())
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} else {
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Ok(())
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}
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} else {
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panic!("Invalid config, both allowed_instances and blocked_instances are specified");
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}
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}
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#[async_trait::async_trait(?Send)]
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pub trait ToApub {
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type Response;
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async fn to_apub(&self, pool: &DbPool) -> Result<Self::Response, LemmyError>;
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fn to_tombstone(&self) -> Result<Tombstone, LemmyError>;
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}
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/// Updated is actually the deletion time
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fn create_tombstone<T>(
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deleted: bool,
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object_id: &str,
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updated: Option<NaiveDateTime>,
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former_type: T,
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) -> Result<Tombstone, LemmyError>
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where
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T: ToString,
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{
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if deleted {
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if let Some(updated) = updated {
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let mut tombstone = Tombstone::new();
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tombstone.set_id(object_id.parse()?);
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tombstone.set_former_type(former_type.to_string());
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tombstone.set_deleted(convert_datetime(updated));
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Ok(tombstone)
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} else {
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Err(anyhow!("Cant convert to tombstone because updated time was None.").into())
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}
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} else {
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Err(anyhow!("Cant convert object to tombstone if it wasnt deleted").into())
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}
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}
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#[async_trait::async_trait(?Send)]
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pub trait FromApub {
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type ApubType;
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/// Converts an object from ActivityPub type to Lemmy internal type.
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///
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/// * `apub` The object to read from
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/// * `context` LemmyContext which holds DB pool, HTTP client etc
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/// * `expected_domain` If present, ensure that the apub object comes from the same domain as
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/// this URL
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///
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async fn from_apub(
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apub: &Self::ApubType,
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context: &LemmyContext,
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expected_domain: Option<Url>,
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) -> Result<Self, LemmyError>
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where
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Self: Sized;
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}
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#[async_trait::async_trait(?Send)]
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pub trait ApubObjectType {
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async fn send_create(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_update(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_delete(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_undo_delete(
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&self,
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creator: &User_,
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context: &LemmyContext,
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) -> Result<(), LemmyError>;
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async fn send_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_undo_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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}
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pub(in crate) fn check_actor_domain<T, Kind>(
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apub: &T,
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expected_domain: Option<Url>,
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) -> Result<String, LemmyError>
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where
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T: Base + AsBase<Kind>,
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{
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let actor_id = if let Some(url) = expected_domain {
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let domain = url.domain().context(location_info!())?;
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apub.id(domain)?.context(location_info!())?
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} else {
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let actor_id = apub.id_unchecked().context(location_info!())?;
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check_is_apub_id_valid(&actor_id)?;
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actor_id
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};
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Ok(actor_id.to_string())
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}
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#[async_trait::async_trait(?Send)]
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pub trait ApubLikeableType {
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async fn send_like(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_dislike(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_undo_like(&self, creator: &User_, context: &LemmyContext)
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-> Result<(), LemmyError>;
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}
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#[async_trait::async_trait(?Send)]
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pub trait ActorType {
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fn actor_id_str(&self) -> String;
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// TODO: every actor should have a public key, so this shouldnt be an option (needs to be fixed in db)
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fn public_key(&self) -> Option<String>;
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fn private_key(&self) -> Option<String>;
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/// numeric id in the database, used for insert_activity
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fn user_id(&self) -> i32;
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// These two have default impls, since currently a community can't follow anything,
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// and a user can't be followed (yet)
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#[allow(unused_variables)]
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async fn send_follow(
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&self,
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follow_actor_id: &Url,
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context: &LemmyContext,
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) -> Result<(), LemmyError>;
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async fn send_unfollow(
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&self,
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follow_actor_id: &Url,
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context: &LemmyContext,
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) -> Result<(), LemmyError>;
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#[allow(unused_variables)]
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async fn send_accept_follow(
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&self,
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follow: Follow,
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context: &LemmyContext,
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) -> Result<(), LemmyError>;
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async fn send_delete(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_undo_delete(
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&self,
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creator: &User_,
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context: &LemmyContext,
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) -> Result<(), LemmyError>;
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async fn send_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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async fn send_undo_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError>;
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/// For a given community, returns the inboxes of all followers.
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async fn get_follower_inboxes(&self, pool: &DbPool) -> Result<Vec<Url>, LemmyError>;
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fn actor_id(&self) -> Result<Url, ParseError> {
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Url::parse(&self.actor_id_str())
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}
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// TODO move these to the db rows
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fn get_inbox_url(&self) -> Result<Url, ParseError> {
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Url::parse(&format!("{}/inbox", &self.actor_id_str()))
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}
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fn get_shared_inbox_url(&self) -> Result<Url, LemmyError> {
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let actor_id = self.actor_id()?;
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let url = format!(
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"{}://{}{}/inbox",
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&actor_id.scheme(),
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&actor_id.host_str().context(location_info!())?,
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if let Some(port) = actor_id.port() {
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format!(":{}", port)
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} else {
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"".to_string()
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},
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);
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Ok(Url::parse(&url)?)
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}
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fn get_outbox_url(&self) -> Result<Url, ParseError> {
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Url::parse(&format!("{}/outbox", &self.actor_id_str()))
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}
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fn get_followers_url(&self) -> Result<Url, ParseError> {
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Url::parse(&format!("{}/followers", &self.actor_id_str()))
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}
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fn get_following_url(&self) -> String {
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format!("{}/following", &self.actor_id_str())
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}
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fn get_liked_url(&self) -> String {
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format!("{}/liked", &self.actor_id_str())
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}
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fn get_public_key_ext(&self) -> Result<PublicKeyExtension, LemmyError> {
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Ok(
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PublicKey {
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id: format!("{}#main-key", self.actor_id_str()),
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owner: self.actor_id_str(),
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public_key_pem: self.public_key().context(location_info!())?,
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}
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.to_ext(),
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)
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}
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}
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pub async fn fetch_webfinger_url(
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mention: &MentionData,
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client: &Client,
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) -> Result<Url, LemmyError> {
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let fetch_url = format!(
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"{}://{}/.well-known/webfinger?resource=acct:{}@{}",
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Settings::get().get_protocol_string(),
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mention.domain,
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mention.name,
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mention.domain
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);
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debug!("Fetching webfinger url: {}", &fetch_url);
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let response = retry(|| client.get(&fetch_url).send()).await?;
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let res: WebFingerResponse = response
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.json()
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.await
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.map_err(|e| RecvError(e.to_string()))?;
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let link = res
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.links
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.iter()
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.find(|l| l.type_.eq(&Some("application/activity+json".to_string())))
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.ok_or_else(|| anyhow!("No application/activity+json link found."))?;
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link
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.href
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.to_owned()
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.map(|u| Url::parse(&u))
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.transpose()?
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.ok_or_else(|| anyhow!("No href found.").into())
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}
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pub async fn insert_activity<T>(
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user_id: i32,
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data: T,
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local: bool,
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pool: &DbPool,
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) -> Result<(), LemmyError>
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where
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T: Serialize + std::fmt::Debug + Send + 'static,
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{
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blocking(pool, move |conn| {
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do_insert_activity(conn, user_id, &data, local)
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})
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.await??;
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Ok(())
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}
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