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https://iceshrimp.dev/limepotato/jormungandr-bite.git
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386 lines
13 KiB
TypeScript
386 lines
13 KiB
TypeScript
import { URL } from "node:url";
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import chalk from "chalk";
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import { IsNull } from "typeorm";
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import config from "@/config/index.js";
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import type { User, IRemoteUser } from "@/models/entities/user.js";
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import { UserProfiles, Users } from "@/models/index.js";
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import { toPuny } from "@/misc/convert-host.js";
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import webFinger from "./webfinger.js";
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import { createPerson, updatePerson } from "./activitypub/models/person.js";
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import { remoteLogger } from "./logger.js";
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import { Cache } from "@/misc/cache.js";
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import { IMentionedRemoteUsers } from "@/models/entities/note.js";
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import { UserProfile } from "@/models/entities/user-profile.js";
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import { RecursionLimiter } from "@/models/repositories/user-profile.js";
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import { promiseEarlyReturn } from "@/prelude/promise.js";
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const logger = remoteLogger.createSubLogger("resolve-user");
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const uriHostCache = new Cache<string>("resolveUserUriHost", 60 * 60 * 24);
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const localUsernameCache = new Cache<string | null>("localUserNameCapitalization", 60 * 60 * 24);
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const profileMentionCache = new Cache<ProfileMention | null>("resolveProfileMentions", 60 * 60);
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type ProfileMention = {
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user: User;
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profile: UserProfile | null;
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data: {
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username: string;
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host: string | null;
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};
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};
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type refreshType = 'refresh' | 'refresh-in-background' | 'refresh-timeout-1500ms' | 'no-refresh';
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export async function resolveUser(
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username: string,
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host: string | null,
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refresh: refreshType = 'refresh',
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limiter: RecursionLimiter = new RecursionLimiter(20)
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): Promise<User> {
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const usernameLower = username.toLowerCase();
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// Return local user if host part is empty
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if (host == null) {
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logger.info(`return local user: ${usernameLower}`);
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return await Users.findOneBy({ usernameLower, host: IsNull() }).then(
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(u) => {
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if (u == null) {
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throw new Error("user not found");
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} else {
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return u;
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}
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},
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);
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}
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host = toPuny(host);
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// Also return local user if host part is specified but referencing the local instance
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if (config.host === host || config.domain === host) {
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logger.info(`return local user: ${usernameLower}`);
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return await Users.findOneBy({ usernameLower, host: IsNull() }).then(
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(u) => {
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if (u == null) {
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throw new Error("user not found");
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} else {
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return u;
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}
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},
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);
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}
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// Check if remote user is already in the database
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let user = (await Users.findOneBy({
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usernameLower,
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host,
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})) as IRemoteUser | null;
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const acctLower = `${usernameLower}@${host}`;
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// If not, look up the user on the remote server
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if (user == null) {
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// Run WebFinger
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const fingerRes = await resolveUserWebFinger(acctLower);
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const finalAcct = subjectToAcct(fingerRes.subject);
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const finalAcctLower = finalAcct.toLowerCase();
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const m = finalAcct.match(/^([^@]+)@(.*)/);
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const subjectHost = m ? m[2] : undefined;
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// If subject is different, we're dealing with a split domain setup (that's already been validated by resolveUserWebFinger)
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if (acctLower != finalAcctLower) {
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logger.info('re-resolving split domain redirect user...');
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const m = finalAcct.match(/^([^@]+)@(.*)/);
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if (m) {
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// Re-check if we already have the user in the database post-redirect
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user = (await Users.findOneBy({
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usernameLower: usernameLower,
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host: subjectHost,
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})) as IRemoteUser | null;
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// If yes, return existing user
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if (user != null) {
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logger.succ(`return existing remote user: ${chalk.magenta(finalAcctLower)}`);
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return user;
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}
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// Otherwise create and return new user
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else {
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logger.succ(`return new remote user: ${chalk.magenta(finalAcctLower)}`);
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return await createPerson(fingerRes.self.href, undefined, subjectHost, limiter);
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}
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}
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}
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// Not a split domain setup, so we can simply create and return the new user
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logger.succ(`return new remote user: ${chalk.magenta(finalAcctLower)}`);
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return await createPerson(fingerRes.self.href, undefined, subjectHost, limiter);
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}
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// If user information is out of date, return it by starting over from WebFinger
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if (
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(refresh === 'refresh' || refresh === 'refresh-timeout-1500ms') && (
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user.lastFetchedAt == null ||
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Date.now() - user.lastFetchedAt.getTime() > 1000 * 60 * 60 * 24
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)
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) {
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// Prevent multiple attempts to connect to unconnected instances, update before each attempt to prevent subsequent similar attempts
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await Users.update(user.id, {
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lastFetchedAt: new Date(),
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});
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logger.info(`try resync: ${acctLower}`);
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const fingerRes = await resolveUserWebFinger(acctLower);
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if (user.uri !== fingerRes.self.href) {
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// if uri mismatch, Fix (user@host <=> AP's Person id(IRemoteUser.uri)) mapping.
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logger.info(`uri missmatch: ${acctLower}`);
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logger.info(
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`recovery mismatch uri for (username=${username}, host=${host}) from ${user.uri} to ${fingerRes.self.href}`,
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);
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// validate uri
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const uri = new URL(fingerRes.self.href);
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if (uri.hostname !== host) {
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throw new Error("Invalid uri");
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}
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await Users.update(
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{
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usernameLower,
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host: host,
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},
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{
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uri: fingerRes.self.href,
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},
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);
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} else {
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logger.info(`uri is fine: ${acctLower}`);
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}
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const finalAcct = subjectToAcct(fingerRes.subject);
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const finalAcctLower = finalAcct.toLowerCase();
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const m = finalAcct.match(/^([^@]+)@(.*)/);
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const finalHost = m ? m[2] : null;
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// Update user.host if we're dealing with an account that's part of a split domain setup that hasn't been fixed yet
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if (m && user.host != finalHost) {
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logger.info(`updating user host to subject acct host: ${user.host} -> ${finalHost}`);
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await Users.update(
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{
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usernameLower,
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host: user.host,
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},
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{
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host: finalHost,
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},
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);
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}
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if (refresh === 'refresh') {
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await updatePerson(fingerRes.self.href);
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logger.info(`return resynced remote user: ${finalAcctLower}`);
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}
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else if (refresh === 'refresh-timeout-1500ms') {
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const res = await promiseEarlyReturn(updatePerson(fingerRes.self.href), 1500);
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logger.info(`return possibly resynced remote user: ${finalAcctLower}`);
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}
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return await Users.findOneBy({ uri: fingerRes.self.href }).then((u) => {
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if (u == null) {
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throw new Error("user not found");
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} else {
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return u;
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}
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});
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} else if (refresh === 'refresh-in-background' && (user.lastFetchedAt == null || Date.now() - user.lastFetchedAt.getTime() > 1000 * 60 * 60 * 24)) {
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// Run the refresh in the background
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// noinspection ES6MissingAwait
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resolveUser(username, host, 'refresh', limiter);
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}
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logger.info(`return existing remote user: ${acctLower}`);
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return user;
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}
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export async function resolveMentionToUserAndProfile(username: string, host: string | null, objectHost: string | null, limiter: RecursionLimiter) {
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return profileMentionCache.fetch(`${username}@${host ?? objectHost}`, async () => {
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try {
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const user = await resolveUser(username, host ?? objectHost, 'no-refresh', limiter);
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const profile = await UserProfiles.findOneBy({ userId: user.id });
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const data = { username, host: host ?? objectHost };
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return { user, profile, data };
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}
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catch {
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return null;
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}
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});
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}
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export function getMentionFallbackUri(username: string, host: string | null, objectHost: string | null): string {
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let fallback = `${config.url}/@${username}`;
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if (host !== null && host !== config.domain)
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fallback += `@${host}`;
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else if (objectHost !== null && objectHost !== config.domain && host !== config.domain)
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fallback += `@${objectHost}`;
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return fallback;
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}
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async function getLocalUsernameCached(username: string): Promise<string | null> {
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return localUsernameCache.fetch(username.toLowerCase(), () =>
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Users.findOneBy({ usernameLower: username.toLowerCase(), host: IsNull() })
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.then(p => p ? p.username : null));
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}
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export async function resolveMentionFromCache(username: string, host: string | null, objectHost: string | null, cache: IMentionedRemoteUsers): Promise<{ username: string, href: string } | null> {
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const isLocal = (host === null && objectHost === null) || host === config.domain;
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if (isLocal) {
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const finalUsername = await getLocalUsernameCached(username);
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if (finalUsername === null) return null;
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username = finalUsername;
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}
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const fallback = getMentionFallbackUri(username, host, objectHost);
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const cached = cache.find(r => r.username.toLowerCase() === username.toLowerCase() && r.host === (host ?? objectHost));
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const href = cached?.url ?? cached?.uri;
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if (cached && href != null) return { username: cached.username, href: href };
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if (isLocal) return { username: username, href: fallback };
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return null;
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}
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export async function getSubjectHostFromUri(uri: string): Promise<string | null> {
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try {
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const acct = subjectToAcct((await webFinger(uri)).subject);
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const res = await resolveUserWebFinger(acct.toLowerCase());
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const finalAcct = subjectToAcct(res.subject);
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const m = finalAcct.match(/^([^@]+)@(.*)/);
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if (!m) {
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return null;
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}
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return m[2];
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}
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catch {
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return null;
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}
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}
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export async function getSubjectHostFromUriAndUsernameCached(uri: string, username: string): Promise<string | null> {
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const url = new URL(uri);
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const hostname = url.hostname;
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username = username.substring(1); // remove leading @ from username
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// This resolves invalid mentions with the URL format https://host.tld/@user@otherhost.tld
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const match = url.pathname.match(/^\/@(?<user>[a-zA-Z0-9_]+|$)@(?<host>[a-zA-Z0-9-.]+\.[a-zA-Z0-9-]+)$/)
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if (match && match.groups?.host) {
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return match.groups.host;
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}
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if (hostname === config.hostname) {
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// user is local, return local account domain
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return config.domain;
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}
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const user = await Users.findOneBy({
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usernameLower: username.toLowerCase(),
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host: hostname
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});
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return user ? user.host : await uriHostCache.fetch(uri, async () => await getSubjectHostFromUri(uri) ?? await getSubjectHostFromAcctParts(username, hostname) ?? hostname);
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}
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export async function getSubjectHostFromAcct(acct: string): Promise<string | null> {
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try {
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const res = await resolveUserWebFinger(acct.toLowerCase());
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const finalAcct = subjectToAcct(res.subject);
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const m = finalAcct.match(/^([^@]+)@(.*)/);
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if (!m) {
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return null;
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}
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return m[2];
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}
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catch {
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return null;
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}
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}
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export async function getSubjectHostFromRemoteUser(user: IRemoteUser | undefined): Promise<string | null> {
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return user ? getSubjectHostFromAcct(`${user.username}@${user.host}`) : null;
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}
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export async function getSubjectHostFromAcctParts(username?: string | undefined, host?: string | undefined): Promise<string | null> {
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return username !== null && host !== null ? getSubjectHostFromAcct(`${username}@${host}`) : null;
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}
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async function resolveUserWebFinger(acctLower: string, recurse: boolean = true): Promise<{
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subject: string,
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self: {
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href: string;
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rel?: string;
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}
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}> {
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logger.info(`WebFinger for ${chalk.yellow(acctLower)}`);
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const fingerRes = await webFinger(acctLower).catch((e) => {
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logger.error(
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`Failed to WebFinger for ${chalk.yellow(acctLower)}: ${
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e.statusCode || e.message
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}`,
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);
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throw new Error(
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`Failed to WebFinger for ${acctLower}: ${e.statusCode || e.message}`,
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);
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});
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const self = fingerRes.links.find(
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(link) => link.rel != null && link.rel.toLowerCase() === "self",
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);
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if (!self) {
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logger.error(
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`Failed to WebFinger for ${chalk.yellow(acctLower)}: self link not found`,
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);
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throw new Error("self link not found");
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}
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if (`${acctToSubject(acctLower)}` !== normalizeSubject(fingerRes.subject)) {
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logger.info(`acct subject mismatch (${acctToSubject(acctLower)} !== ${normalizeSubject(fingerRes.subject)}), possible split domain deployment detected, repeating webfinger`)
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if (!recurse){
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logger.error('split domain verification failed (recurse limit reached), aborting')
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throw new Error('split domain verification failed (recurse limit reached), aborting');
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}
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const initialAcct = subjectToAcct(fingerRes.subject);
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const initialAcctLower = initialAcct.toLowerCase();
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const splitFingerRes = await resolveUserWebFinger(initialAcctLower, false);
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const finalAcct = subjectToAcct(splitFingerRes.subject);
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const finalAcctLower = finalAcct.toLowerCase();
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if (initialAcct !== finalAcct) {
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logger.error('split domain verification failed (subject mismatch), aborting')
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throw new Error('split domain verification failed (subject mismatch), aborting');
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}
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logger.info(`split domain configuration detected: ${acctLower} -> ${finalAcctLower}`);
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return splitFingerRes;
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}
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return {
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subject: fingerRes.subject,
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self: self
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};
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}
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function subjectToAcct(subject: string): string {
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if (!subject.startsWith('acct:')) {
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logger.error("Subject isnt a valid acct");
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throw ("Subject isnt a valid acct");
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}
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return subject.substring(5);
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}
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function acctToSubject(acct: string): string {
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return normalizeSubject(`acct:${acct}`);
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}
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function normalizeSubject(subject: string): string {
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return subject.toLowerCase();
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}
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