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When site banning a federated user, also remove their content from our local communities. (#4464)

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* When banning a federated user, also remove their content from our local
communities.

- This works by:
  - Before a site ban, find all posts and comments to local communities
  - Send a federated community ban action for each local comm.
  - This also removes their content in the apub receive code.
- Adding back in federated community ban api tests.
- Adding in two more api tests for site bans.
- Fixes #4118

* Add local community ban, and nonlocal person check.

* Ignoring errors.

* Move local check into function.

* Addressing PR comments 2
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Dessalines 2024-03-01 13:45:06 -05:00 committed by GitHub
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10 changed files with 1317 additions and 2239 deletions
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12
api_tests/package.json
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@ -19,16 +19,16 @@
"api-test-image": "jest -i image.spec.ts"
},
"devDependencies": {
"@types/jest": "^29.5.11",
"@types/node": "^20.10.4",
"@typescript-eslint/eslint-plugin": "^6.14.0",
"@typescript-eslint/parser": "^6.14.0",
"@types/jest": "^29.5.12",
"@types/node": "^20.11.19",
"@typescript-eslint/eslint-plugin": "^7.0.2",
"@typescript-eslint/parser": "^7.0.2",
"download-file-sync": "^1.0.4",
"eslint": "^8.55.0",
"eslint-plugin-prettier": "^5.0.1",
"jest": "^29.5.0",
"lemmy-js-client": "0.19.3-alpha.2",
"prettier": "^3.1.1",
"lemmy-js-client": "0.19.4-alpha.4",
"prettier": "^3.2.5",
"ts-jest": "^29.1.0",
"typescript": "^5.3.3"
}

3214
api_tests/pnpm-lock.yaml
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2
api_tests/src/community.spec.ts
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@ -29,9 +29,7 @@ import {
delta,
betaAllowedInstances,
searchPostLocal,
resolveBetaCommunity,
longDelay,
delay,
editCommunity,
} from "./shared";
import { EditCommunity, EditSite } from "lemmy-js-client";

1
api_tests/src/image.spec.ts
View File

@ -23,7 +23,6 @@ import {
resolvePost,
setupLogins,
unfollowRemotes,
waitForPost,
} from "./shared";
const downloadFileSync = require("download-file-sync");

138
api_tests/src/post.spec.ts
View File

@ -23,7 +23,6 @@ import {
unfollowRemotes,
resolvePerson,
banPersonFromSite,
searchPostLocal,
followCommunity,
banPersonFromCommunity,
reportPost,
@ -38,10 +37,9 @@ import {
alphaUrl,
loginUser,
createCommunity,
getPosts,
} from "./shared";
import { PostView } from "lemmy-js-client/dist/types/PostView";
import { EditSite, ListingType, ResolveObject } from "lemmy-js-client";
import { EditSite, ResolveObject } from "lemmy-js-client";
let betaCommunity: CommunityView | undefined;
@ -239,12 +237,14 @@ test("Collection of featured posts gets federated", async () => {
beta,
community.community_view.community.actor_id,
);
expect(betaCommunity).toBeDefined();
const betaPost = await waitForPost(
beta,
post.post_view.post,
post => post?.post.featured_community === true,
);
expect(betaPost).toBeDefined();
});
test("Lock a post", async () => {
@ -428,30 +428,34 @@ test("Search for a post", async () => {
expect(betaPost?.post.name).toBeDefined();
});
test("Enforce site ban for federated user", async () => {
test("Enforce site ban federation for local user", async () => {
if (!betaCommunity) {
throw "Missing beta community";
}
// create a test user
let alpha_user = await registerUser(alpha, alphaUrl);
let alphaUserPerson = (await getSite(alpha_user)).my_user?.local_user_view
let alphaUserHttp = await registerUser(alpha, alphaUrl);
let alphaUserPerson = (await getSite(alphaUserHttp)).my_user?.local_user_view
.person;
let alphaUserActorId = alphaUserPerson?.actor_id;
if (!alphaUserActorId) {
throw "Missing alpha user actor id";
}
expect(alphaUserActorId).toBeDefined();
let alphaPerson = (await resolvePerson(alpha_user, alphaUserActorId!)).person;
await followBeta(alphaUserHttp);
let alphaPerson = (await resolvePerson(alphaUserHttp, alphaUserActorId!))
.person;
if (!alphaPerson) {
throw "Missing alpha person";
}
expect(alphaPerson).toBeDefined();
// alpha makes post in beta community, it federates to beta instance
let postRes1 = await createPost(alpha_user, betaCommunity.community.id);
let postRes1 = await createPost(alphaUserHttp, betaCommunity.community.id);
let searchBeta1 = await waitForPost(beta, postRes1.post_view.post);
// ban alpha from its instance
// ban alpha from its own instance
let banAlpha = await banPersonFromSite(
alpha,
alphaPerson.person.id,
@ -468,10 +472,11 @@ test("Enforce site ban for federated user", async () => {
expect(alphaUserOnBeta1.person?.person.banned).toBe(true);
// existing alpha post should be removed on beta
await waitUntil(
let betaBanRes = await waitUntil(
() => getPost(beta, searchBeta1.post.id),
s => s.post_view.post.removed,
);
expect(betaBanRes.post_view.post.removed).toBe(true);
// Unban alpha
let unBanAlpha = await banPersonFromSite(
@ -487,21 +492,84 @@ test("Enforce site ban for federated user", async () => {
throw "Missing alpha person";
}
let newAlphaUserJwt = await loginUser(alpha, alphaUserPerson.name);
alpha_user.setHeaders({
alphaUserHttp.setHeaders({
Authorization: "Bearer " + newAlphaUserJwt.jwt ?? "",
});
// alpha makes new post in beta community, it federates
let postRes2 = await createPost(alpha_user, betaCommunity!.community.id);
let postRes2 = await createPost(alphaUserHttp, betaCommunity!.community.id);
await waitForPost(beta, postRes2.post_view.post);
let alphaUserOnBeta2 = await resolvePerson(beta, alphaUserActorId!);
expect(alphaUserOnBeta2.person?.person.banned).toBe(false);
await unfollowRemotes(alpha);
});
test.skip("Enforce community ban for federated user", async () => {
test("Enforce site ban federation for federated user", async () => {
if (!betaCommunity) {
throw "Missing beta community";
}
// create a test user
let alphaUserHttp = await registerUser(alpha, alphaUrl);
let alphaUserPerson = (await getSite(alphaUserHttp)).my_user?.local_user_view
.person;
let alphaUserActorId = alphaUserPerson?.actor_id;
if (!alphaUserActorId) {
throw "Missing alpha user actor id";
}
expect(alphaUserActorId).toBeDefined();
await followBeta(alphaUserHttp);
let alphaUserOnBeta2 = await resolvePerson(beta, alphaUserActorId!);
expect(alphaUserOnBeta2.person?.person.banned).toBe(false);
if (!alphaUserOnBeta2.person) {
throw "Missing alpha person";
}
// alpha makes post in beta community, it federates to beta instance
let postRes1 = await createPost(alphaUserHttp, betaCommunity.community.id);
let searchBeta1 = await waitForPost(beta, postRes1.post_view.post);
expect(searchBeta1.post).toBeDefined();
// Now ban and remove their data from beta
let banAlphaOnBeta = await banPersonFromSite(
beta,
alphaUserOnBeta2.person.person.id,
true,
true,
);
expect(banAlphaOnBeta.banned).toBe(true);
// The beta site ban should NOT be federated to alpha
let alphaPerson2 = (await getSite(alphaUserHttp)).my_user!.local_user_view
.person;
expect(alphaPerson2.banned).toBe(false);
// existing alpha post should be removed on beta
let betaBanRes = await waitUntil(
() => getPost(beta, searchBeta1.post.id),
s => s.post_view.post.removed,
);
expect(betaBanRes.post_view.post.removed).toBe(true);
// existing alpha's post to the beta community should be removed on alpha
let alphaPostAfterRemoveOnBeta = await waitUntil(
() => getPost(alpha, postRes1.post_view.post.id),
s => s.post_view.post.removed,
);
expect(betaBanRes.post_view.post.removed).toBe(true);
expect(alphaPostAfterRemoveOnBeta.post_view.post.removed).toBe(true);
expect(
alphaPostAfterRemoveOnBeta.post_view.creator_banned_from_community,
).toBe(true);
await unfollowRemotes(alpha);
});
test("Enforce community ban for federated user", async () => {
if (!betaCommunity) {
throw "Missing beta community";
}
await followBeta(alpha);
let alphaShortname = `@lemmy_alpha@lemmy-alpha:8541`;
let alphaPerson = (await resolvePerson(beta, alphaShortname)).person;
if (!alphaPerson) {
@ -511,38 +579,46 @@ test.skip("Enforce community ban for federated user", async () => {
// make a post in beta, it goes through
let postRes1 = await createPost(alpha, betaCommunity.community.id);
let searchBeta1 = await searchPostLocal(beta, postRes1.post_view.post);
expect(searchBeta1.posts[0]).toBeDefined();
let searchBeta1 = await waitForPost(beta, postRes1.post_view.post);
expect(searchBeta1.post).toBeDefined();
// ban alpha from beta community
let banAlpha = await banPersonFromCommunity(
beta,
alphaPerson.person.id,
2,
searchBeta1.community.id,
true,
true,
);
expect(banAlpha.banned).toBe(true);
// ensure that the post by alpha got removed
await expect(getPost(alpha, searchBeta1.posts[0].post.id)).rejects.toBe(
Error("unknown"),
let removePostRes = await waitUntil(
() => getPost(alpha, postRes1.post_view.post.id),
s => s.post_view.post.removed,
);
expect(removePostRes.post_view.post.removed).toBe(true);
expect(removePostRes.post_view.creator_banned_from_community).toBe(true);
expect(removePostRes.community_view.banned_from_community).toBe(true);
// Alpha tries to make post on beta, but it fails because of ban
await expect(createPost(alpha, betaCommunity.community.id)).rejects.toBe(
Error("banned_from_community"),
);
await expect(
createPost(alpha, betaCommunity.community.id),
).rejects.toStrictEqual(Error("banned_from_community"));
// Unban alpha
let unBanAlpha = await banPersonFromCommunity(
beta,
alphaPerson.person.id,
2,
searchBeta1.community.id,
false,
false,
);
expect(unBanAlpha.banned).toBe(false);
// Need to re-follow the community
await followBeta(alpha);
let postRes3 = await createPost(alpha, betaCommunity.community.id);
expect(postRes3.post_view.post).toBeDefined();
expect(postRes3.post_view.community.local).toBe(false);
@ -550,19 +626,25 @@ test.skip("Enforce community ban for federated user", async () => {
expect(postRes3.post_view.counts.score).toBe(1);
// Make sure that post makes it to beta community
let searchBeta2 = await searchPostLocal(beta, postRes3.post_view.post);
expect(searchBeta2.posts[0]).toBeDefined();
let postRes4 = await waitForPost(beta, postRes3.post_view.post);
expect(postRes4.post).toBeDefined();
expect(postRes4.creator_banned_from_community).toBe(false);
await unfollowRemotes(alpha);
});
test("A and G subscribe to B (center) A posts, it gets announced to G", async () => {
if (!betaCommunity) {
throw "Missing beta community";
}
await followBeta(alpha);
let postRes = await createPost(alpha, betaCommunity.community.id);
expect(postRes.post_view.post).toBeDefined();
let betaPost = (await resolvePost(gamma, postRes.post_view.post)).post;
expect(betaPost?.post.name).toBeDefined();
await unfollowRemotes(alpha);
});
test("Report a post", async () => {
@ -571,6 +653,7 @@ test("Report a post", async () => {
if (!betaCommunity) {
throw "Missing beta community";
}
await followBeta(alpha);
let postRes = await createPost(beta, betaCommunity.community.id);
expect(postRes.post_view.post).toBeDefined();
@ -598,9 +681,11 @@ test("Report a post", async () => {
expect(betaReport.original_post_url).toBe(alphaReport.original_post_url);
expect(betaReport.original_post_body).toBe(alphaReport.original_post_body);
expect(betaReport.reason).toBe(alphaReport.reason);
await unfollowRemotes(alpha);
});
test("Fetch post via redirect", async () => {
await followBeta(alpha);
let alphaPost = await createPost(alpha, betaCommunity!.community.id);
expect(alphaPost.post_view.post).toBeDefined();
// Make sure that post is liked on beta
@ -621,4 +706,5 @@ test("Fetch post via redirect", async () => {
let gammaPost = await gamma.resolveObject(form);
expect(gammaPost).toBeDefined();
expect(gammaPost.post?.post.ap_id).toBe(alphaPost.post_view.post.ap_id);
await unfollowRemotes(alpha);
});

2
api_tests/src/shared.ts
View File

@ -394,7 +394,7 @@ export async function banPersonFromSite(
let form: BanPerson = {
person_id,
ban,
remove_data: remove_data,
remove_data,
};
return api.banPerson(form);
}

111
crates/api/src/lib.rs
View File

@ -1,13 +1,29 @@
use activitypub_federation::config::Data;
use actix_web::{http::header::Header, HttpRequest};
use actix_web_httpauth::headers::authorization::{Authorization, Bearer};
use base64::{engine::general_purpose::STANDARD_NO_PAD as base64, Engine};
use captcha::Captcha;
use lemmy_api_common::{
claims::Claims,
community::BanFromCommunity,
context::LemmyContext,
utils::{check_user_valid, local_site_to_slur_regex, AUTH_COOKIE_NAME},
send_activity::{ActivityChannel, SendActivityData},
utils::{check_expire_time, check_user_valid, local_site_to_slur_regex, AUTH_COOKIE_NAME},
};
use lemmy_db_schema::{
source::{
community::{
CommunityFollower,
CommunityFollowerForm,
CommunityPersonBan,
CommunityPersonBanForm,
},
local_site::LocalSite,
moderator::{ModBanFromCommunity, ModBanFromCommunityForm},
person::Person,
},
traits::{Bannable, Crud, Followable},
};
use lemmy_db_schema::source::local_site::LocalSite;
use lemmy_db_views::structs::LocalUserView;
use lemmy_utils::{
error::{LemmyError, LemmyErrorExt, LemmyErrorExt2, LemmyErrorType, LemmyResult},
@ -141,6 +157,97 @@ pub(crate) fn build_totp_2fa(
.with_lemmy_type(LemmyErrorType::CouldntGenerateTotp)
}
/// Site bans are only federated for local users.
/// This is a problem, because site-banning non-local users will still leave content
/// they've posted to our local communities, on other servers.
///
/// So when doing a site ban for a non-local user, you need to federate/send a
/// community ban for every local community they've participated in.
/// See https://github.com/LemmyNet/lemmy/issues/4118
#[tracing::instrument(skip_all)]
pub(crate) async fn ban_nonlocal_user_from_local_communities(
local_user_view: &LocalUserView,
target: &Person,
ban: bool,
reason: &Option<String>,
remove_data: &Option<bool>,
expires: &Option<i64>,
context: &Data<LemmyContext>,
) -> LemmyResult<()> {
// Only run this code for federated users
if !target.local {
let ids = Person::list_local_community_ids(&mut context.pool(), target.id).await?;
for community_id in ids {
let expires_dt = check_expire_time(*expires)?;
// Ban / unban them from our local communities
let community_user_ban_form = CommunityPersonBanForm {
community_id,
person_id: target.id,
expires: Some(expires_dt),
};
if ban {
// Ignore all errors for these
CommunityPersonBan::ban(&mut context.pool(), &community_user_ban_form)
.await
.ok();
// Also unsubscribe them from the community, if they are subscribed
let community_follower_form = CommunityFollowerForm {
community_id,
person_id: target.id,
pending: false,
};
CommunityFollower::unfollow(&mut context.pool(), &community_follower_form)
.await
.ok();
} else {
CommunityPersonBan::unban(&mut context.pool(), &community_user_ban_form)
.await
.ok();
}
// Mod tables
let form = ModBanFromCommunityForm {
mod_person_id: local_user_view.person.id,
other_person_id: target.id,
community_id,
reason: reason.clone(),
banned: Some(ban),
expires: expires_dt,
};
ModBanFromCommunity::create(&mut context.pool(), &form).await?;
// Federate the ban from community
let ban_from_community = BanFromCommunity {
community_id,
person_id: target.id,
ban,
reason: reason.clone(),
remove_data: *remove_data,
expires: *expires,
};
ActivityChannel::submit_activity(
SendActivityData::BanFromCommunity {
moderator: local_user_view.person.clone(),
community_id,
target: target.clone(),
data: ban_from_community,
},
context,
)
.await?;
}
}
Ok(())
}
#[tracing::instrument(skip_all)]
pub async fn local_user_view_from_jwt(
jwt: &str,

18
crates/api/src/local_user/ban_person.rs
View File

@ -1,3 +1,4 @@
use crate::ban_nonlocal_user_from_local_communities;
use activitypub_federation::config::Data;
use actix_web::web::Json;
use lemmy_api_common::{
@ -47,7 +48,7 @@ pub async fn ban_from_site(
.with_lemmy_type(LemmyErrorType::CouldntUpdateUser)?;
// if its a local user, invalidate logins
let local_user = LocalUserView::read_person(&mut context.pool(), data.person_id).await;
let local_user = LocalUserView::read_person(&mut context.pool(), person.id).await;
if let Ok(local_user) = local_user {
LoginToken::invalidate_all(&mut context.pool(), local_user.local_user.id).await?;
}
@ -61,7 +62,7 @@ pub async fn ban_from_site(
// Mod tables
let form = ModBanForm {
mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
other_person_id: person.id,
reason: data.reason.clone(),
banned: Some(data.ban),
expires,
@ -69,7 +70,18 @@ pub async fn ban_from_site(
ModBan::create(&mut context.pool(), &form).await?;
let person_view = PersonView::read(&mut context.pool(), data.person_id).await?;
let person_view = PersonView::read(&mut context.pool(), person.id).await?;
ban_nonlocal_user_from_local_communities(
&local_user_view,
&person,
data.ban,
&data.reason,
&data.remove_data,
&data.expires,
&context,
)
.await?;
ActivityChannel::submit_activity(
SendActivityData::BanFromSite {

31
crates/db_schema/src/impls/comment.rs
View File

@ -1,6 +1,6 @@
use crate::{
newtypes::{CommentId, DbUrl, PersonId},
schema::comment::dsl::{ap_id, comment, content, creator_id, deleted, path, removed, updated},
schema::comment,
source::comment::{
Comment,
CommentInsertForm,
@ -30,11 +30,11 @@ impl Comment {
) -> Result<Vec<Self>, Error> {
let conn = &mut get_conn(pool).await?;
diesel::update(comment.filter(creator_id.eq(for_creator_id)))
diesel::update(comment::table.filter(comment::creator_id.eq(for_creator_id)))
.set((
content.eq(DELETED_REPLACEMENT_TEXT),
deleted.eq(true),
updated.eq(naive_now()),
comment::content.eq(DELETED_REPLACEMENT_TEXT),
comment::deleted.eq(true),
comment::updated.eq(naive_now()),
))
.get_results::<Self>(conn)
.await
@ -46,8 +46,11 @@ impl Comment {
new_removed: bool,
) -> Result<Vec<Self>, Error> {
let conn = &mut get_conn(pool).await?;
diesel::update(comment.filter(creator_id.eq(for_creator_id)))
.set((removed.eq(new_removed), updated.eq(naive_now())))
diesel::update(comment::table.filter(comment::creator_id.eq(for_creator_id)))
.set((
comment::removed.eq(new_removed),
comment::updated.eq(naive_now()),
))
.get_results::<Self>(conn)
.await
}
@ -64,9 +67,9 @@ impl Comment {
.run(|conn| {
Box::pin(async move {
// Insert, to get the id
let inserted_comment = insert_into(comment)
let inserted_comment = insert_into(comment::table)
.values(comment_form)
.on_conflict(ap_id)
.on_conflict(comment::ap_id)
.do_update()
.set(comment_form)
.get_result::<Self>(conn)
@ -84,8 +87,8 @@ impl Comment {
format!("{}.{}", 0, comment_id)
});
let updated_comment = diesel::update(comment.find(comment_id))
.set(path.eq(ltree))
let updated_comment = diesel::update(comment::table.find(comment_id))
.set(comment::path.eq(ltree))
.get_result::<Self>(conn)
.await?;
@ -133,8 +136,8 @@ where ca.comment_id = c.id"
let conn = &mut get_conn(pool).await?;
let object_id: DbUrl = object_id.into();
Ok(
comment
.filter(ap_id.eq(object_id))
comment::table
.filter(comment::ap_id.eq(object_id))
.first::<Comment>(conn)
.await
.ok()
@ -171,7 +174,7 @@ impl Crud for Comment {
comment_form: &Self::UpdateForm,
) -> Result<Self, Error> {
let conn = &mut get_conn(pool).await?;
diesel::update(comment.find(comment_id))
diesel::update(comment::table.find(comment_id))
.set(comment_form)
.get_result::<Self>(conn)
.await

27
crates/db_schema/src/impls/person.rs
View File

@ -1,6 +1,6 @@
use crate::{
newtypes::{CommunityId, DbUrl, InstanceId, PersonId},
schema::{instance, local_user, person, person_follower},
schema::{comment, community, instance, local_user, person, person_follower, post},
source::person::{
Person,
PersonFollower,
@ -11,7 +11,7 @@ use crate::{
traits::{ApubActor, Crud, Followable},
utils::{functions::lower, get_conn, naive_now, DbPool},
};
use diesel::{dsl::insert_into, result::Error, ExpressionMethods, JoinOnDsl, QueryDsl};
use diesel::{dsl::insert_into, result::Error, CombineDsl, ExpressionMethods, JoinOnDsl, QueryDsl};
use diesel_async::RunQueryDsl;
#[async_trait]
@ -84,6 +84,29 @@ impl Person {
.get_result::<Self>(conn)
.await
}
/// Lists local community ids for all posts and comments for a given creator.
pub async fn list_local_community_ids(
pool: &mut DbPool<'_>,
for_creator_id: PersonId,
) -> Result<Vec<CommunityId>, Error> {
let conn = &mut get_conn(pool).await?;
comment::table
.inner_join(post::table)
.inner_join(community::table.on(post::community_id.eq(community::id)))
.filter(community::local.eq(true))
.filter(comment::creator_id.eq(for_creator_id))
.select(community::id)
.union(
post::table
.inner_join(community::table)
.filter(community::local.eq(true))
.filter(post::creator_id.eq(for_creator_id))
.select(community::id),
)
.load::<CommunityId>(conn)
.await
}
}
impl PersonInsertForm {