Sharkey/packages/backend/src/server/ActivityPubServerService.ts

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import { Inject, Injectable } from '@nestjs/common';
import Router from '@koa/router';
import json from 'koa-json-body';
import httpSignature from '@peertube/http-signature';
import { Brackets, In, IsNull, LessThan, Not } from 'typeorm';
import { DI } from '@/di-symbols.js';
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import type { FollowingsRepository, NotesRepository, EmojisRepository, NoteReactionsRepository, UserProfilesRepository, UserNotePiningsRepository, UsersRepository } from '@/models/index.js';
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import * as url from '@/misc/prelude/url.js';
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import type { Config } from '@/config.js';
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import { ApRendererService } from '@/core/remote/activitypub/ApRendererService.js';
import { QueueService } from '@/core/QueueService.js';
import type { ILocalUser, User } from '@/models/entities/User.js';
import { UserKeypairStoreService } from '@/core/UserKeypairStoreService.js';
import type { Following } from '@/models/entities/Following.js';
import { countIf } from '@/misc/prelude/array.js';
import type { Note } from '@/models/entities/Note.js';
import { QueryService } from '@/core/QueryService.js';
import { UtilityService } from '@/core/UtilityService.js';
import { UserEntityService } from '@/core/entities/UserEntityService.js';
import type { FindOptionsWhere } from 'typeorm';
const ACTIVITY_JSON = 'application/activity+json; charset=utf-8';
const LD_JSON = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"; charset=utf-8';
@Injectable()
export class ActivityPubServerService {
constructor(
@Inject(DI.config)
private config: Config,
@Inject(DI.usersRepository)
private usersRepository: UsersRepository,
@Inject(DI.userProfilesRepository)
private userProfilesRepository: UserProfilesRepository,
@Inject(DI.notesRepository)
private notesRepository: NotesRepository,
@Inject(DI.noteReactionsRepository)
private noteReactionsRepository: NoteReactionsRepository,
@Inject(DI.emojisRepository)
private emojisRepository: EmojisRepository,
@Inject(DI.userNotePiningsRepository)
private userNotePiningsRepository: UserNotePiningsRepository,
@Inject(DI.followingsRepository)
private followingsRepository: FollowingsRepository,
private utilityService: UtilityService,
private userEntityService: UserEntityService,
private apRendererService: ApRendererService,
private queueService: QueueService,
private userKeypairStoreService: UserKeypairStoreService,
private queryService: QueryService,
) {
}
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private setResponseType(ctx: Router.RouterContext) {
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const accept = ctx.accepts(ACTIVITY_JSON, LD_JSON);
if (accept === LD_JSON) {
ctx.response.type = LD_JSON;
} else {
ctx.response.type = ACTIVITY_JSON;
}
}
/**
* Pack Create<Note> or Announce Activity
* @param note Note
*/
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private async packActivity(note: Note): Promise<any> {
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if (note.renoteId && note.text == null && !note.hasPoll && (note.fileIds == null || note.fileIds.length === 0)) {
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const renote = await this.notesRepository.findOneByOrFail({ id: note.renoteId });
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return this.apRendererService.renderAnnounce(renote.uri ? renote.uri : `${this.config.url}/notes/${renote.id}`, note);
}
return this.apRendererService.renderCreate(await this.apRendererService.renderNote(note, false), note);
}
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private inbox(ctx: Router.RouterContext) {
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let signature;
try {
signature = httpSignature.parseRequest(ctx.req, { 'headers': [] });
} catch (e) {
ctx.status = 401;
return;
}
this.queueService.inbox(ctx.request.body, signature);
ctx.status = 202;
}
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private async followers(ctx: Router.RouterContext) {
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const userId = ctx.params.user;
const cursor = ctx.request.query.cursor;
if (cursor != null && typeof cursor !== 'string') {
ctx.status = 400;
return;
}
const page = ctx.request.query.page === 'true';
const user = await this.usersRepository.findOneBy({
id: userId,
host: IsNull(),
});
if (user == null) {
ctx.status = 404;
return;
}
//#region Check ff visibility
const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
if (profile.ffVisibility === 'private') {
ctx.status = 403;
ctx.set('Cache-Control', 'public, max-age=30');
return;
} else if (profile.ffVisibility === 'followers') {
ctx.status = 403;
ctx.set('Cache-Control', 'public, max-age=30');
return;
}
//#endregion
const limit = 10;
const partOf = `${this.config.url}/users/${userId}/followers`;
if (page) {
const query = {
followeeId: user.id,
} as FindOptionsWhere<Following>;
// カーソルが指定されている場合
if (cursor) {
query.id = LessThan(cursor);
}
// Get followers
const followings = await this.followingsRepository.find({
where: query,
take: limit + 1,
order: { id: -1 },
});
// 「次のページ」があるかどうか
const inStock = followings.length === limit + 1;
if (inStock) followings.pop();
const renderedFollowers = await Promise.all(followings.map(following => this.apRendererService.renderFollowUser(following.followerId)));
const rendered = this.apRendererService.renderOrderedCollectionPage(
`${partOf}?${url.query({
page: 'true',
cursor,
})}`,
user.followersCount, renderedFollowers, partOf,
undefined,
inStock ? `${partOf}?${url.query({
page: 'true',
cursor: followings[followings.length - 1].id,
})}` : undefined,
);
ctx.body = this.apRendererService.renderActivity(rendered);
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this.setResponseType(ctx);
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} else {
// index page
const rendered = this.apRendererService.renderOrderedCollection(partOf, user.followersCount, `${partOf}?page=true`);
ctx.body = this.apRendererService.renderActivity(rendered);
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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}
}
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private async following(ctx: Router.RouterContext) {
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const userId = ctx.params.user;
const cursor = ctx.request.query.cursor;
if (cursor != null && typeof cursor !== 'string') {
ctx.status = 400;
return;
}
const page = ctx.request.query.page === 'true';
const user = await this.usersRepository.findOneBy({
id: userId,
host: IsNull(),
});
if (user == null) {
ctx.status = 404;
return;
}
//#region Check ff visibility
const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
if (profile.ffVisibility === 'private') {
ctx.status = 403;
ctx.set('Cache-Control', 'public, max-age=30');
return;
} else if (profile.ffVisibility === 'followers') {
ctx.status = 403;
ctx.set('Cache-Control', 'public, max-age=30');
return;
}
//#endregion
const limit = 10;
const partOf = `${this.config.url}/users/${userId}/following`;
if (page) {
const query = {
followerId: user.id,
} as FindOptionsWhere<Following>;
// カーソルが指定されている場合
if (cursor) {
query.id = LessThan(cursor);
}
// Get followings
const followings = await this.followingsRepository.find({
where: query,
take: limit + 1,
order: { id: -1 },
});
// 「次のページ」があるかどうか
const inStock = followings.length === limit + 1;
if (inStock) followings.pop();
const renderedFollowees = await Promise.all(followings.map(following => this.apRendererService.renderFollowUser(following.followeeId)));
const rendered = this.apRendererService.renderOrderedCollectionPage(
`${partOf}?${url.query({
page: 'true',
cursor,
})}`,
user.followingCount, renderedFollowees, partOf,
undefined,
inStock ? `${partOf}?${url.query({
page: 'true',
cursor: followings[followings.length - 1].id,
})}` : undefined,
);
ctx.body = this.apRendererService.renderActivity(rendered);
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this.setResponseType(ctx);
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} else {
// index page
const rendered = this.apRendererService.renderOrderedCollection(partOf, user.followingCount, `${partOf}?page=true`);
ctx.body = this.apRendererService.renderActivity(rendered);
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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}
}
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private async featured(ctx: Router.RouterContext) {
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const userId = ctx.params.user;
const user = await this.usersRepository.findOneBy({
id: userId,
host: IsNull(),
});
if (user == null) {
ctx.status = 404;
return;
}
const pinings = await this.userNotePiningsRepository.find({
where: { userId: user.id },
order: { id: 'DESC' },
});
const pinnedNotes = await Promise.all(pinings.map(pining =>
this.notesRepository.findOneByOrFail({ id: pining.noteId })));
const renderedNotes = await Promise.all(pinnedNotes.map(note => this.apRendererService.renderNote(note)));
const rendered = this.apRendererService.renderOrderedCollection(
`${this.config.url}/users/${userId}/collections/featured`,
renderedNotes.length, undefined, undefined, renderedNotes,
);
ctx.body = this.apRendererService.renderActivity(rendered);
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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}
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private async outbox(ctx: Router.RouterContext) {
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const userId = ctx.params.user;
const sinceId = ctx.request.query.since_id;
if (sinceId != null && typeof sinceId !== 'string') {
ctx.status = 400;
return;
}
const untilId = ctx.request.query.until_id;
if (untilId != null && typeof untilId !== 'string') {
ctx.status = 400;
return;
}
const page = ctx.request.query.page === 'true';
if (countIf(x => x != null, [sinceId, untilId]) > 1) {
ctx.status = 400;
return;
}
const user = await this.usersRepository.findOneBy({
id: userId,
host: IsNull(),
});
if (user == null) {
ctx.status = 404;
return;
}
const limit = 20;
const partOf = `${this.config.url}/users/${userId}/outbox`;
if (page) {
const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), sinceId, untilId)
.andWhere('note.userId = :userId', { userId: user.id })
.andWhere(new Brackets(qb => { qb
.where('note.visibility = \'public\'')
.orWhere('note.visibility = \'home\'');
}))
.andWhere('note.localOnly = FALSE');
const notes = await query.take(limit).getMany();
if (sinceId) notes.reverse();
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const activities = await Promise.all(notes.map(note => this.packActivity(note)));
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const rendered = this.apRendererService.renderOrderedCollectionPage(
`${partOf}?${url.query({
page: 'true',
since_id: sinceId,
until_id: untilId,
})}`,
user.notesCount, activities, partOf,
notes.length ? `${partOf}?${url.query({
page: 'true',
since_id: notes[0].id,
})}` : undefined,
notes.length ? `${partOf}?${url.query({
page: 'true',
until_id: notes[notes.length - 1].id,
})}` : undefined,
);
ctx.body = this.apRendererService.renderActivity(rendered);
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this.setResponseType(ctx);
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} else {
// index page
const rendered = this.apRendererService.renderOrderedCollection(partOf, user.notesCount,
`${partOf}?page=true`,
`${partOf}?page=true&since_id=000000000000000000000000`,
);
ctx.body = this.apRendererService.renderActivity(rendered);
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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}
}
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private async userInfo(ctx: Router.RouterContext, user: User | null) {
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if (user == null) {
ctx.status = 404;
return;
}
ctx.body = this.apRendererService.renderActivity(await this.apRendererService.renderPerson(user as ILocalUser));
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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}
public createRouter() {
// Init router
const router = new Router();
//#region Routing
function isActivityPubReq(ctx: Router.RouterContext) {
ctx.response.vary('Accept');
const accepted = ctx.accepts('html', ACTIVITY_JSON, LD_JSON);
return typeof accepted === 'string' && !accepted.match(/html/);
}
// inbox
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router.post('/inbox', json(), ctx => this.inbox(ctx));
router.post('/users/:user/inbox', json(), ctx => this.inbox(ctx));
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// note
router.get('/notes/:note', async (ctx, next) => {
if (!isActivityPubReq(ctx)) return await next();
const note = await this.notesRepository.findOneBy({
id: ctx.params.note,
visibility: In(['public' as const, 'home' as const]),
localOnly: false,
});
if (note == null) {
ctx.status = 404;
return;
}
// リモートだったらリダイレクト
if (note.userHost != null) {
if (note.uri == null || this.utilityService.isSelfHost(note.userHost)) {
ctx.status = 500;
return;
}
ctx.redirect(note.uri);
return;
}
ctx.body = this.apRendererService.renderActivity(await this.apRendererService.renderNote(note, false));
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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});
// note activity
router.get('/notes/:note/activity', async ctx => {
const note = await this.notesRepository.findOneBy({
id: ctx.params.note,
userHost: IsNull(),
visibility: In(['public' as const, 'home' as const]),
localOnly: false,
});
if (note == null) {
ctx.status = 404;
return;
}
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ctx.body = this.apRendererService.renderActivity(await this.packActivity(note));
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ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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});
// outbox
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router.get('/users/:user/outbox', (ctx) => this.outbox(ctx));
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// followers
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router.get('/users/:user/followers', (ctx) => this.followers(ctx));
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// following
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router.get('/users/:user/following', (ctx) => this.following(ctx));
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// featured
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router.get('/users/:user/collections/featured', (ctx) => this.featured(ctx));
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// publickey
router.get('/users/:user/publickey', async ctx => {
const userId = ctx.params.user;
const user = await this.usersRepository.findOneBy({
id: userId,
host: IsNull(),
});
if (user == null) {
ctx.status = 404;
return;
}
const keypair = await this.userKeypairStoreService.getUserKeypair(user.id);
if (this.userEntityService.isLocalUser(user)) {
ctx.body = this.apRendererService.renderActivity(this.apRendererService.renderKey(user, keypair));
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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} else {
ctx.status = 400;
}
});
router.get('/users/:user', async (ctx, next) => {
if (!isActivityPubReq(ctx)) return await next();
const userId = ctx.params.user;
const user = await this.usersRepository.findOneBy({
id: userId,
host: IsNull(),
isSuspended: false,
});
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await this.userInfo(ctx, user);
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});
router.get('/@:user', async (ctx, next) => {
if (!isActivityPubReq(ctx)) return await next();
const user = await this.usersRepository.findOneBy({
usernameLower: ctx.params.user.toLowerCase(),
host: IsNull(),
isSuspended: false,
});
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await this.userInfo(ctx, user);
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});
//#endregion
// emoji
router.get('/emojis/:emoji', async ctx => {
const emoji = await this.emojisRepository.findOneBy({
host: IsNull(),
name: ctx.params.emoji,
});
if (emoji == null) {
ctx.status = 404;
return;
}
ctx.body = this.apRendererService.renderActivity(await this.apRendererService.renderEmoji(emoji));
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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});
// like
router.get('/likes/:like', async ctx => {
const reaction = await this.noteReactionsRepository.findOneBy({ id: ctx.params.like });
if (reaction == null) {
ctx.status = 404;
return;
}
const note = await this.notesRepository.findOneBy({ id: reaction.noteId });
if (note == null) {
ctx.status = 404;
return;
}
ctx.body = this.apRendererService.renderActivity(await this.apRendererService.renderLike(reaction, note));
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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});
// follow
router.get('/follows/:follower/:followee', async ctx => {
// This may be used before the follow is completed, so we do not
// check if the following exists.
const [follower, followee] = await Promise.all([
this.usersRepository.findOneBy({
id: ctx.params.follower,
host: IsNull(),
}),
this.usersRepository.findOneBy({
id: ctx.params.followee,
host: Not(IsNull()),
}),
]);
if (follower == null || followee == null) {
ctx.status = 404;
return;
}
ctx.body = this.apRendererService.renderActivity(this.apRendererService.renderFollow(follower, followee));
ctx.set('Cache-Control', 'public, max-age=180');
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this.setResponseType(ctx);
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});
return router;
}
}