iceshrimp/packages/backend/src/server/activitypub.ts
ThatOneCalculator 2aab2de38d refactor: 🎨 rome
2023-01-12 20:40:33 -08:00

369 lines
8.8 KiB
TypeScript

import Router from "@koa/router";
import json from "koa-json-body";
import httpSignature from "@peertube/http-signature";
import { In, IsNull, Not } from "typeorm";
import { renderActivity } from "@/remote/activitypub/renderer/index.js";
import renderNote from "@/remote/activitypub/renderer/note.js";
import renderKey from "@/remote/activitypub/renderer/key.js";
import { renderPerson } from "@/remote/activitypub/renderer/person.js";
import renderEmoji from "@/remote/activitypub/renderer/emoji.js";
import { inbox as processInbox } from "@/queue/index.js";
import { isSelfHost, toPuny } from "@/misc/convert-host.js";
import { Notes, Users, Emojis, NoteReactions } from "@/models/index.js";
import type { ILocalUser, User } from "@/models/entities/user.js";
import { renderLike } from "@/remote/activitypub/renderer/like.js";
import { getUserKeypair } from "@/misc/keypair-store.js";
import { checkFetch, hasSignature } from "@/remote/activitypub/check-fetch.js";
import { getInstanceActor } from "@/services/instance-actor.js";
import { fetchMeta } from "@/misc/fetch-meta.js";
import renderFollow from "@/remote/activitypub/renderer/follow.js";
import Featured from "./activitypub/featured.js";
import Following from "./activitypub/following.js";
import Followers from "./activitypub/followers.js";
import Outbox, { packActivity } from "./activitypub/outbox.js";
// Init router
const router = new Router();
//#region Routing
function inbox(ctx: Router.RouterContext) {
let signature;
try {
signature = httpSignature.parseRequest(ctx.req, { headers: [] });
} catch (e) {
ctx.status = 401;
return;
}
processInbox(ctx.request.body, signature);
ctx.status = 202;
}
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';
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/);
}
export function setResponseType(ctx: Router.RouterContext) {
const accept = ctx.accepts(ACTIVITY_JSON, LD_JSON);
if (accept === LD_JSON) {
ctx.response.type = LD_JSON;
} else {
ctx.response.type = ACTIVITY_JSON;
}
}
// inbox
router.post("/inbox", json(), inbox);
router.post("/users/:user/inbox", json(), inbox);
// note
router.get("/notes/:note", async (ctx, next) => {
if (!isActivityPubReq(ctx)) return await next();
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const note = await Notes.findOneBy({
id: ctx.params.note,
visibility: In(["public" as const, "home" as const]),
localOnly: false,
});
if (note == null) {
ctx.status = 404;
return;
}
// redirect if remote
if (note.userHost !== null) {
if (note.uri == null || isSelfHost(note.userHost)) {
ctx.status = 500;
return;
}
ctx.redirect(note.uri);
return;
}
ctx.body = renderActivity(await renderNote(note, false));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
});
// note activity
router.get("/notes/:note/activity", async (ctx) => {
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const note = await Notes.findOneBy({
id: ctx.params.note,
userHost: IsNull(),
visibility: In(["public" as const, "home" as const]),
localOnly: false,
});
if (note == null) {
ctx.status = 404;
return;
}
ctx.body = renderActivity(await packActivity(note));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
});
// outbox
router.get("/users/:user/outbox", Outbox);
// followers
router.get("/users/:user/followers", Followers);
// following
router.get("/users/:user/following", Following);
// featured
router.get("/users/:user/collections/featured", Featured);
// publickey
router.get("/users/:user/publickey", async (ctx) => {
const instanceActor = await getInstanceActor();
if (ctx.params.user === instanceActor.id) {
ctx.body = renderActivity(
renderKey(instanceActor, await getUserKeypair(instanceActor.id)),
);
ctx.set("Cache-Control", "public, max-age=180");
setResponseType(ctx);
return;
}
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const userId = ctx.params.user;
const user = await Users.findOneBy({
id: userId,
host: IsNull(),
});
if (user == null) {
ctx.status = 404;
return;
}
const keypair = await getUserKeypair(user.id);
if (Users.isLocalUser(user)) {
ctx.body = renderActivity(renderKey(user, keypair));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
} else {
ctx.status = 400;
}
});
// user
async function userInfo(ctx: Router.RouterContext, user: User | null) {
if (user == null) {
ctx.status = 404;
return;
}
ctx.body = renderActivity(await renderPerson(user as ILocalUser));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
}
router.get("/users/:user", async (ctx, next) => {
if (!isActivityPubReq(ctx)) return await next();
const instanceActor = await getInstanceActor();
if (ctx.params.user === instanceActor.id) {
await userInfo(ctx, instanceActor);
return;
}
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const userId = ctx.params.user;
const user = await Users.findOneBy({
id: userId,
host: IsNull(),
isSuspended: false,
});
await userInfo(ctx, user);
});
router.get("/@:user", async (ctx, next) => {
if (!isActivityPubReq(ctx)) return await next();
if (ctx.params.user === "instance.actor") {
const instanceActor = await getInstanceActor();
await userInfo(ctx, instanceActor);
return;
}
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const user = await Users.findOneBy({
usernameLower: ctx.params.user.toLowerCase(),
host: IsNull(),
isSuspended: false,
});
await userInfo(ctx, user);
});
router.get("/actor", async (ctx, next) => {
const instanceActor = await getInstanceActor();
await userInfo(ctx, instanceActor);
});
//#endregion
// emoji
router.get("/emojis/:emoji", async (ctx) => {
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const emoji = await Emojis.findOneBy({
host: IsNull(),
name: ctx.params.emoji,
});
if (emoji == null) {
ctx.status = 404;
return;
}
ctx.body = renderActivity(await renderEmoji(emoji));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
});
// like
router.get("/likes/:like", async (ctx) => {
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
const reaction = await NoteReactions.findOneBy({ id: ctx.params.like });
if (reaction == null) {
ctx.status = 404;
return;
}
const note = await Notes.findOneBy({ id: reaction.noteId });
if (note == null) {
ctx.status = 404;
return;
}
ctx.body = renderActivity(await renderLike(reaction, note));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
});
// follow
router.get("/follows/:follower/:followee", async (ctx) => {
const verify = await checkFetch(ctx.req);
if (verify !== 200) {
ctx.status = verify;
return;
}
// This may be used before the follow is completed, so we do not
// check if the following exists.
const [follower, followee] = await Promise.all([
Users.findOneBy({
id: ctx.params.follower,
host: IsNull(),
}),
Users.findOneBy({
id: ctx.params.followee,
host: Not(IsNull()),
}),
]);
if (follower == null || followee == null) {
ctx.status = 404;
return;
}
ctx.body = renderActivity(renderFollow(follower, followee));
const meta = await fetchMeta();
if (meta.secureMode || meta.privateMode) {
ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
} else {
ctx.set("Cache-Control", "public, max-age=180");
}
setResponseType(ctx);
});
export default router;