mirror of
https://github.com/whippyshou/mastodon
synced 2024-12-01 00:08:32 +09:00
1369 lines
41 KiB
JavaScript
1369 lines
41 KiB
JavaScript
// @ts-check
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const fs = require('fs');
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const http = require('http');
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const url = require('url');
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const dotenv = require('dotenv');
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const express = require('express');
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const { JSDOM } = require('jsdom');
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const log = require('npmlog');
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const pg = require('pg');
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const dbUrlToConfig = require('pg-connection-string').parse;
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const redis = require('redis');
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const uuid = require('uuid');
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const WebSocket = require('ws');
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const environment = process.env.NODE_ENV || 'development';
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dotenv.config({
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path: environment === 'production' ? '.env.production' : '.env',
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});
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log.level = process.env.LOG_LEVEL || 'verbose';
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/**
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* @param {Object.<string, any>} defaultConfig
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* @param {string} redisUrl
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*/
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const redisUrlToClient = async (defaultConfig, redisUrl) => {
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const config = defaultConfig;
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let client;
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if (!redisUrl) {
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client = redis.createClient(config);
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} else if (redisUrl.startsWith('unix://')) {
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client = redis.createClient(Object.assign(config, {
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socket: {
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path: redisUrl.slice(7),
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},
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}));
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} else {
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client = redis.createClient(Object.assign(config, {
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url: redisUrl,
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}));
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}
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client.on('error', (err) => log.error('Redis Client Error!', err));
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await client.connect();
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return client;
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};
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/**
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* Attempts to safely parse a string as JSON, used when both receiving a message
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* from redis and when receiving a message from a client over a websocket
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* connection, this is why it accepts a `req` argument.
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* @param {string} json
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* @param {any?} req
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* @returns {Object.<string, any>|null}
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*/
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const parseJSON = (json, req) => {
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try {
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return JSON.parse(json);
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} catch (err) {
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/* FIXME: This logging isn't great, and should probably be done at the
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* call-site of parseJSON, not in the method, but this would require changing
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* the signature of parseJSON to return something akin to a Result type:
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* [Error|null, null|Object<string,any}], and then handling the error
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* scenarios.
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*/
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if (req) {
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if (req.accountId) {
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log.warn(req.requestId, `Error parsing message from user ${req.accountId}: ${err}`);
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} else {
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log.silly(req.requestId, `Error parsing message from ${req.remoteAddress}: ${err}`);
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}
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} else {
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log.warn(`Error parsing message from redis: ${err}`);
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}
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return null;
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}
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};
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/**
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* @param {Object.<string, any>} env the `process.env` value to read configuration from
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* @returns {Object.<string, any>} the configuration for the PostgreSQL connection
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*/
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const pgConfigFromEnv = (env) => {
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const pgConfigs = {
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development: {
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user: env.DB_USER || pg.defaults.user,
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password: env.DB_PASS || pg.defaults.password,
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database: env.DB_NAME || 'mastodon_development',
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host: env.DB_HOST || pg.defaults.host,
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port: env.DB_PORT || pg.defaults.port,
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},
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production: {
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user: env.DB_USER || 'mastodon',
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password: env.DB_PASS || '',
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database: env.DB_NAME || 'mastodon_production',
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host: env.DB_HOST || 'localhost',
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port: env.DB_PORT || 5432,
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},
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};
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let baseConfig;
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if (env.DATABASE_URL) {
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baseConfig = dbUrlToConfig(env.DATABASE_URL);
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} else {
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baseConfig = pgConfigs[environment];
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if (env.DB_SSLMODE) {
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switch(env.DB_SSLMODE) {
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case 'disable':
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case '':
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baseConfig.ssl = false;
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break;
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case 'no-verify':
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baseConfig.ssl = { rejectUnauthorized: false };
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break;
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default:
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baseConfig.ssl = {};
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break;
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}
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}
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}
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return {
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...baseConfig,
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max: env.DB_POOL || 10,
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connectionTimeoutMillis: 15000,
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application_name: '',
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};
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};
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/**
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* @param {Object.<string, any>} env the `process.env` value to read configuration from
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* @returns {Object.<string, any>} configuration for the Redis connection
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*/
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const redisConfigFromEnv = (env) => {
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const redisNamespace = env.REDIS_NAMESPACE || null;
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const redisParams = {
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socket: {
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host: env.REDIS_HOST || '127.0.0.1',
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port: env.REDIS_PORT || 6379,
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},
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database: env.REDIS_DB || 0,
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password: env.REDIS_PASSWORD || undefined,
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};
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if (redisNamespace) {
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redisParams.namespace = redisNamespace;
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}
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const redisPrefix = redisNamespace ? `${redisNamespace}:` : '';
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return {
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redisParams,
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redisPrefix,
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redisUrl: env.REDIS_URL,
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};
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};
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const startServer = async () => {
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const app = express();
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app.set('trust proxy', process.env.TRUSTED_PROXY_IP ? process.env.TRUSTED_PROXY_IP.split(/(?:\s*,\s*|\s+)/) : 'loopback,uniquelocal');
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const pgPool = new pg.Pool(pgConfigFromEnv(process.env));
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const server = http.createServer(app);
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const { redisParams, redisUrl, redisPrefix } = redisConfigFromEnv(process.env);
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/**
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* @type {Object.<string, Array.<function(Object<string, any>): void>>}
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*/
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const subs = {};
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const redisSubscribeClient = await redisUrlToClient(redisParams, redisUrl);
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const redisClient = await redisUrlToClient(redisParams, redisUrl);
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/**
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* @param {string[]} channels
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* @returns {function(): void}
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*/
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const subscriptionHeartbeat = channels => {
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const interval = 6 * 60;
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const tellSubscribed = () => {
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channels.forEach(channel => redisClient.set(`${redisPrefix}subscribed:${channel}`, '1', 'EX', interval * 3));
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};
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tellSubscribed();
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const heartbeat = setInterval(tellSubscribed, interval * 1000);
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return () => {
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clearInterval(heartbeat);
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};
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};
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/**
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* @param {string} message
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* @param {string} channel
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*/
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const onRedisMessage = (message, channel) => {
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const callbacks = subs[channel];
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log.silly(`New message on channel ${channel}`);
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if (!callbacks) {
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return;
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}
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const json = parseJSON(message, null);
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if (!json) return;
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callbacks.forEach(callback => callback(json));
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};
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/**
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* @callback SubscriptionListener
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* @param {ReturnType<parseJSON>} json of the message
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* @returns void
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*/
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/**
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* @param {string} channel
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* @param {SubscriptionListener} callback
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*/
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const subscribe = (channel, callback) => {
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log.silly(`Adding listener for ${channel}`);
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subs[channel] = subs[channel] || [];
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if (subs[channel].length === 0) {
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log.verbose(`Subscribe ${channel}`);
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redisSubscribeClient.subscribe(channel, onRedisMessage);
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}
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subs[channel].push(callback);
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};
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/**
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* @param {string} channel
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* @param {SubscriptionListener} callback
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*/
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const unsubscribe = (channel, callback) => {
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log.silly(`Removing listener for ${channel}`);
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if (!subs[channel]) {
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return;
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}
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subs[channel] = subs[channel].filter(item => item !== callback);
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if (subs[channel].length === 0) {
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log.verbose(`Unsubscribe ${channel}`);
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redisSubscribeClient.unsubscribe(channel);
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delete subs[channel];
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}
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};
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const FALSE_VALUES = [
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false,
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0,
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'0',
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'f',
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'F',
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'false',
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'FALSE',
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'off',
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'OFF',
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];
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/**
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* @param {any} value
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* @returns {boolean}
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*/
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const isTruthy = value =>
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value && !FALSE_VALUES.includes(value);
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/**
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* @param {any} req
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* @param {any} res
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* @param {function(Error=): void} next
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*/
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const allowCrossDomain = (req, res, next) => {
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res.header('Access-Control-Allow-Origin', '*');
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res.header('Access-Control-Allow-Headers', 'Authorization, Accept, Cache-Control');
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res.header('Access-Control-Allow-Methods', 'GET, OPTIONS');
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next();
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};
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/**
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* @param {any} req
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* @param {any} res
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* @param {function(Error=): void} next
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*/
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const setRequestId = (req, res, next) => {
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req.requestId = uuid.v4();
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res.header('X-Request-Id', req.requestId);
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next();
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};
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/**
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* @param {any} req
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* @param {any} res
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* @param {function(Error=): void} next
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*/
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const setRemoteAddress = (req, res, next) => {
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req.remoteAddress = req.connection.remoteAddress;
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next();
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};
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/**
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* @param {any} req
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* @param {string[]} necessaryScopes
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* @returns {boolean}
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*/
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const isInScope = (req, necessaryScopes) =>
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req.scopes.some(scope => necessaryScopes.includes(scope));
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/**
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* @param {string} token
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* @param {any} req
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* @returns {Promise.<void>}
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*/
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const accountFromToken = (token, req) => new Promise((resolve, reject) => {
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pgPool.connect((err, client, done) => {
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if (err) {
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reject(err);
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return;
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}
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client.query('SELECT oauth_access_tokens.id, oauth_access_tokens.resource_owner_id, users.account_id, users.chosen_languages, oauth_access_tokens.scopes, devices.device_id FROM oauth_access_tokens INNER JOIN users ON oauth_access_tokens.resource_owner_id = users.id LEFT OUTER JOIN devices ON oauth_access_tokens.id = devices.access_token_id WHERE oauth_access_tokens.token = $1 AND oauth_access_tokens.revoked_at IS NULL LIMIT 1', [token], (err, result) => {
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done();
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if (err) {
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reject(err);
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return;
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}
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if (result.rows.length === 0) {
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err = new Error('Invalid access token');
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err.status = 401;
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reject(err);
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return;
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}
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req.accessTokenId = result.rows[0].id;
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req.scopes = result.rows[0].scopes.split(' ');
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req.accountId = result.rows[0].account_id;
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req.chosenLanguages = result.rows[0].chosen_languages;
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req.deviceId = result.rows[0].device_id;
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resolve();
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});
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});
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});
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/**
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* @param {any} req
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* @returns {Promise.<void>}
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*/
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const accountFromRequest = (req) => new Promise((resolve, reject) => {
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const authorization = req.headers.authorization;
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const location = url.parse(req.url, true);
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const accessToken = location.query.access_token || req.headers['sec-websocket-protocol'];
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if (!authorization && !accessToken) {
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const err = new Error('Missing access token');
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err.status = 401;
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reject(err);
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return;
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}
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const token = authorization ? authorization.replace(/^Bearer /, '') : accessToken;
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resolve(accountFromToken(token, req));
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});
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/**
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* @param {any} req
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* @returns {string|undefined}
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*/
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const channelNameFromPath = req => {
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const { path, query } = req;
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const onlyMedia = isTruthy(query.only_media);
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switch (path) {
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case '/api/v1/streaming/user':
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return 'user';
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case '/api/v1/streaming/user/notification':
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return 'user:notification';
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case '/api/v1/streaming/public':
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return onlyMedia ? 'public:media' : 'public';
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case '/api/v1/streaming/public/local':
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return onlyMedia ? 'public:local:media' : 'public:local';
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case '/api/v1/streaming/public/remote':
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return onlyMedia ? 'public:remote:media' : 'public:remote';
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case '/api/v1/streaming/hashtag':
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return 'hashtag';
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case '/api/v1/streaming/hashtag/local':
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return 'hashtag:local';
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case '/api/v1/streaming/direct':
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return 'direct';
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case '/api/v1/streaming/list':
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return 'list';
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default:
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return undefined;
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}
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};
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const PUBLIC_CHANNELS = [
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'public',
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'public:media',
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'public:local',
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'public:local:media',
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'public:remote',
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'public:remote:media',
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'hashtag',
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'hashtag:local',
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];
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/**
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* @param {any} req
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* @param {string} channelName
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* @returns {Promise.<void>}
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*/
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const checkScopes = (req, channelName) => new Promise((resolve, reject) => {
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log.silly(req.requestId, `Checking OAuth scopes for ${channelName}`);
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// When accessing public channels, no scopes are needed
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if (PUBLIC_CHANNELS.includes(channelName)) {
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resolve();
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return;
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}
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// The `read` scope has the highest priority, if the token has it
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// then it can access all streams
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const requiredScopes = ['read'];
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// When accessing specifically the notifications stream,
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// we need a read:notifications, while in all other cases,
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// we can allow access with read:statuses. Mind that the
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// user stream will not contain notifications unless
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// the token has either read or read:notifications scope
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// as well, this is handled separately.
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if (channelName === 'user:notification') {
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requiredScopes.push('read:notifications');
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} else {
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requiredScopes.push('read:statuses');
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}
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if (req.scopes && requiredScopes.some(requiredScope => req.scopes.includes(requiredScope))) {
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resolve();
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return;
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}
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const err = new Error('Access token does not cover required scopes');
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err.status = 401;
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reject(err);
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});
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/**
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* @param {any} info
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* @param {function(boolean, number, string): void} callback
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*/
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const wsVerifyClient = (info, callback) => {
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// When verifying the websockets connection, we no longer pre-emptively
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// check OAuth scopes and drop the connection if they're missing. We only
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// drop the connection if access without token is not allowed by environment
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// variables. OAuth scope checks are moved to the point of subscription
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// to a specific stream.
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accountFromRequest(info.req).then(() => {
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callback(true, undefined, undefined);
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}).catch(err => {
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log.error(info.req.requestId, err.toString());
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callback(false, 401, 'Unauthorized');
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});
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};
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/**
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* @typedef SystemMessageHandlers
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* @property {function(): void} onKill
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*/
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/**
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* @param {any} req
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* @param {SystemMessageHandlers} eventHandlers
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* @returns {function(object): void}
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*/
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const createSystemMessageListener = (req, eventHandlers) => {
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return message => {
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const { event } = message;
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log.silly(req.requestId, `System message for ${req.accountId}: ${event}`);
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if (event === 'kill') {
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log.verbose(req.requestId, `Closing connection for ${req.accountId} due to expired access token`);
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eventHandlers.onKill();
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} else if (event === 'filters_changed') {
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log.verbose(req.requestId, `Invalidating filters cache for ${req.accountId}`);
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req.cachedFilters = null;
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}
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};
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};
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/**
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* @param {any} req
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* @param {any} res
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*/
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const subscribeHttpToSystemChannel = (req, res) => {
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const accessTokenChannelId = `timeline:access_token:${req.accessTokenId}`;
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const systemChannelId = `timeline:system:${req.accountId}`;
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const listener = createSystemMessageListener(req, {
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onKill() {
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res.end();
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},
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});
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res.on('close', () => {
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unsubscribe(`${redisPrefix}${accessTokenChannelId}`, listener);
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unsubscribe(`${redisPrefix}${systemChannelId}`, listener);
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});
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subscribe(`${redisPrefix}${accessTokenChannelId}`, listener);
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subscribe(`${redisPrefix}${systemChannelId}`, listener);
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};
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/**
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* @param {any} req
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* @param {any} res
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* @param {function(Error=): void} next
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*/
|
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const authenticationMiddleware = (req, res, next) => {
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if (req.method === 'OPTIONS') {
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next();
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return;
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}
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accountFromRequest(req).then(() => checkScopes(req, channelNameFromPath(req))).then(() => {
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subscribeHttpToSystemChannel(req, res);
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}).then(() => {
|
|
next();
|
|
}).catch(err => {
|
|
next(err);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* @param {Error} err
|
|
* @param {any} req
|
|
* @param {any} res
|
|
* @param {function(Error=): void} next
|
|
*/
|
|
const errorMiddleware = (err, req, res, next) => {
|
|
log.error(req.requestId, err.toString());
|
|
|
|
if (res.headersSent) {
|
|
next(err);
|
|
return;
|
|
}
|
|
|
|
res.writeHead(err.status || 500, { 'Content-Type': 'application/json' });
|
|
res.end(JSON.stringify({ error: err.status ? err.toString() : 'An unexpected error occurred' }));
|
|
};
|
|
|
|
/**
|
|
* @param {array} arr
|
|
* @param {number=} shift
|
|
* @returns {string}
|
|
*/
|
|
const placeholders = (arr, shift = 0) => arr.map((_, i) => `$${i + 1 + shift}`).join(', ');
|
|
|
|
/**
|
|
* @param {string} listId
|
|
* @param {any} req
|
|
* @returns {Promise.<void>}
|
|
*/
|
|
const authorizeListAccess = (listId, req) => new Promise((resolve, reject) => {
|
|
const { accountId } = req;
|
|
|
|
pgPool.connect((err, client, done) => {
|
|
if (err) {
|
|
reject();
|
|
return;
|
|
}
|
|
|
|
client.query('SELECT id, account_id FROM lists WHERE id = $1 LIMIT 1', [listId], (err, result) => {
|
|
done();
|
|
|
|
if (err || result.rows.length === 0 || result.rows[0].account_id !== accountId) {
|
|
reject();
|
|
return;
|
|
}
|
|
|
|
resolve();
|
|
});
|
|
});
|
|
});
|
|
|
|
/**
|
|
* @param {string[]} ids
|
|
* @param {any} req
|
|
* @param {function(string, string): void} output
|
|
* @param {undefined | function(string[], SubscriptionListener): void} attachCloseHandler
|
|
* @param {boolean=} needsFiltering
|
|
* @returns {SubscriptionListener}
|
|
*/
|
|
const streamFrom = (ids, req, output, attachCloseHandler, needsFiltering = false) => {
|
|
const accountId = req.accountId || req.remoteAddress;
|
|
|
|
log.verbose(req.requestId, `Starting stream from ${ids.join(', ')} for ${accountId}`);
|
|
|
|
const transmit = (event, payload) => {
|
|
// TODO: Replace "string"-based delete payloads with object payloads:
|
|
const encodedPayload = typeof payload === 'object' ? JSON.stringify(payload) : payload;
|
|
|
|
log.silly(req.requestId, `Transmitting for ${accountId}: ${event} ${encodedPayload}`);
|
|
output(event, encodedPayload);
|
|
};
|
|
|
|
// The listener used to process each message off the redis subscription,
|
|
// message here is an object with an `event` and `payload` property. Some
|
|
// events also include a queued_at value, but this is being removed shortly.
|
|
/** @type {SubscriptionListener} */
|
|
const listener = message => {
|
|
const { event, payload } = message;
|
|
|
|
// Streaming only needs to apply filtering to some channels and only to
|
|
// some events. This is because majority of the filtering happens on the
|
|
// Ruby on Rails side when producing the event for streaming.
|
|
//
|
|
// The only events that require filtering from the streaming server are
|
|
// `update` and `status.update`, all other events are transmitted to the
|
|
// client as soon as they're received (pass-through).
|
|
//
|
|
// The channels that need filtering are determined in the function
|
|
// `channelNameToIds` defined below:
|
|
if (!needsFiltering || (event !== 'update' && event !== 'status.update')) {
|
|
transmit(event, payload);
|
|
return;
|
|
}
|
|
|
|
// The rest of the logic from here on in this function is to handle
|
|
// filtering of statuses:
|
|
|
|
// Filter based on language:
|
|
if (Array.isArray(req.chosenLanguages) && payload.language !== null && req.chosenLanguages.indexOf(payload.language) === -1) {
|
|
log.silly(req.requestId, `Message ${payload.id} filtered by language (${payload.language})`);
|
|
return;
|
|
}
|
|
|
|
// When the account is not logged in, it is not necessary to confirm the block or mute
|
|
if (!req.accountId) {
|
|
transmit(event, payload);
|
|
return;
|
|
}
|
|
|
|
// Filter based on domain blocks, blocks, mutes, or custom filters:
|
|
const targetAccountIds = [payload.account.id].concat(payload.mentions.map(item => item.id));
|
|
const accountDomain = payload.account.acct.split('@')[1];
|
|
|
|
// TODO: Move this logic out of the message handling loop
|
|
pgPool.connect((err, client, releasePgConnection) => {
|
|
if (err) {
|
|
log.error(err);
|
|
return;
|
|
}
|
|
|
|
const queries = [
|
|
client.query(`SELECT 1
|
|
FROM blocks
|
|
WHERE (account_id = $1 AND target_account_id IN (${placeholders(targetAccountIds, 2)}))
|
|
OR (account_id = $2 AND target_account_id = $1)
|
|
UNION
|
|
SELECT 1
|
|
FROM mutes
|
|
WHERE account_id = $1
|
|
AND target_account_id IN (${placeholders(targetAccountIds, 2)})`, [req.accountId, payload.account.id].concat(targetAccountIds)),
|
|
];
|
|
|
|
if (accountDomain) {
|
|
queries.push(client.query('SELECT 1 FROM account_domain_blocks WHERE account_id = $1 AND domain = $2', [req.accountId, accountDomain]));
|
|
}
|
|
|
|
if (!payload.filtered && !req.cachedFilters) {
|
|
queries.push(client.query('SELECT filter.id AS id, filter.phrase AS title, filter.context AS context, filter.expires_at AS expires_at, filter.action AS filter_action, keyword.keyword AS keyword, keyword.whole_word AS whole_word FROM custom_filter_keywords keyword JOIN custom_filters filter ON keyword.custom_filter_id = filter.id WHERE filter.account_id = $1 AND (filter.expires_at IS NULL OR filter.expires_at > NOW())', [req.accountId]));
|
|
}
|
|
|
|
Promise.all(queries).then(values => {
|
|
releasePgConnection();
|
|
|
|
// Handling blocks & mutes and domain blocks: If one of those applies,
|
|
// then we don't transmit the payload of the event to the client
|
|
if (values[0].rows.length > 0 || (accountDomain && values[1].rows.length > 0)) {
|
|
return;
|
|
}
|
|
|
|
// If the payload already contains the `filtered` property, it means
|
|
// that filtering has been applied on the ruby on rails side, as
|
|
// such, we don't need to construct or apply the filters in streaming:
|
|
if (Object.prototype.hasOwnProperty.call(payload, "filtered")) {
|
|
transmit(event, payload);
|
|
return;
|
|
}
|
|
|
|
// Handling for constructing the custom filters and caching them on the request
|
|
// TODO: Move this logic out of the message handling lifecycle
|
|
if (!req.cachedFilters) {
|
|
const filterRows = values[accountDomain ? 2 : 1].rows;
|
|
|
|
req.cachedFilters = filterRows.reduce((cache, filter) => {
|
|
if (cache[filter.id]) {
|
|
cache[filter.id].keywords.push([filter.keyword, filter.whole_word]);
|
|
} else {
|
|
cache[filter.id] = {
|
|
keywords: [[filter.keyword, filter.whole_word]],
|
|
expires_at: filter.expires_at,
|
|
filter: {
|
|
id: filter.id,
|
|
title: filter.title,
|
|
context: filter.context,
|
|
expires_at: filter.expires_at,
|
|
// filter.filter_action is the value from the
|
|
// custom_filters.action database column, it is an integer
|
|
// representing a value in an enum defined by Ruby on Rails:
|
|
//
|
|
// enum { warn: 0, hide: 1 }
|
|
filter_action: ['warn', 'hide'][filter.filter_action],
|
|
},
|
|
};
|
|
}
|
|
|
|
return cache;
|
|
}, {});
|
|
|
|
// Construct the regular expressions for the custom filters: This
|
|
// needs to be done in a separate loop as the database returns one
|
|
// filterRow per keyword, so we need all the keywords before
|
|
// constructing the regular expression
|
|
Object.keys(req.cachedFilters).forEach((key) => {
|
|
req.cachedFilters[key].regexp = new RegExp(req.cachedFilters[key].keywords.map(([keyword, whole_word]) => {
|
|
let expr = keyword.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
|
|
|
|
if (whole_word) {
|
|
if (/^[\w]/.test(expr)) {
|
|
expr = `\\b${expr}`;
|
|
}
|
|
|
|
if (/[\w]$/.test(expr)) {
|
|
expr = `${expr}\\b`;
|
|
}
|
|
}
|
|
|
|
return expr;
|
|
}).join('|'), 'i');
|
|
});
|
|
}
|
|
|
|
// Apply cachedFilters against the payload, constructing a
|
|
// `filter_results` array of FilterResult entities
|
|
if (req.cachedFilters) {
|
|
const status = payload;
|
|
// TODO: Calculate searchableContent in Ruby on Rails:
|
|
const searchableContent = ([status.spoiler_text || '', status.content].concat((status.poll && status.poll.options) ? status.poll.options.map(option => option.title) : [])).concat(status.media_attachments.map(att => att.description)).join('\n\n').replace(/<br\s*\/?>/g, '\n').replace(/<\/p><p>/g, '\n\n');
|
|
const searchableTextContent = JSDOM.fragment(searchableContent).textContent;
|
|
|
|
const now = new Date();
|
|
const filter_results = Object.values(req.cachedFilters).reduce((results, cachedFilter) => {
|
|
// Check the filter hasn't expired before applying:
|
|
if (cachedFilter.expires_at !== null && cachedFilter.expires_at < now) {
|
|
return results;
|
|
}
|
|
|
|
// Just in-case JSDOM fails to find textContent in searchableContent
|
|
if (!searchableTextContent) {
|
|
return results;
|
|
}
|
|
|
|
const keyword_matches = searchableTextContent.match(cachedFilter.regexp);
|
|
if (keyword_matches) {
|
|
// results is an Array of FilterResult; status_matches is always
|
|
// null as we only are only applying the keyword-based custom
|
|
// filters, not the status-based custom filters.
|
|
// https://docs.joinmastodon.org/entities/FilterResult/
|
|
results.push({
|
|
filter: cachedFilter.filter,
|
|
keyword_matches,
|
|
status_matches: null
|
|
});
|
|
}
|
|
|
|
return results;
|
|
}, []);
|
|
|
|
// Send the payload + the FilterResults as the `filtered` property
|
|
// to the streaming connection. To reach this code, the `event` must
|
|
// have been either `update` or `status.update`, meaning the
|
|
// `payload` is a Status entity, which has a `filtered` property:
|
|
//
|
|
// filtered: https://docs.joinmastodon.org/entities/Status/#filtered
|
|
transmit(event, {
|
|
...payload,
|
|
filtered: filter_results
|
|
});
|
|
} else {
|
|
transmit(event, payload);
|
|
}
|
|
}).catch(err => {
|
|
log.error(err);
|
|
releasePgConnection();
|
|
});
|
|
});
|
|
};
|
|
|
|
ids.forEach(id => {
|
|
subscribe(`${redisPrefix}${id}`, listener);
|
|
});
|
|
|
|
if (typeof attachCloseHandler === 'function') {
|
|
attachCloseHandler(ids.map(id => `${redisPrefix}${id}`), listener);
|
|
}
|
|
|
|
return listener;
|
|
};
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @param {any} res
|
|
* @returns {function(string, string): void}
|
|
*/
|
|
const streamToHttp = (req, res) => {
|
|
const accountId = req.accountId || req.remoteAddress;
|
|
|
|
res.setHeader('Content-Type', 'text/event-stream');
|
|
res.setHeader('Cache-Control', 'no-store');
|
|
res.setHeader('Transfer-Encoding', 'chunked');
|
|
|
|
res.write(':)\n');
|
|
|
|
const heartbeat = setInterval(() => res.write(':thump\n'), 15000);
|
|
|
|
req.on('close', () => {
|
|
log.verbose(req.requestId, `Ending stream for ${accountId}`);
|
|
clearInterval(heartbeat);
|
|
});
|
|
|
|
return (event, payload) => {
|
|
res.write(`event: ${event}\n`);
|
|
res.write(`data: ${payload}\n\n`);
|
|
};
|
|
};
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @param {function(): void} [closeHandler]
|
|
* @returns {function(string[], SubscriptionListener): void}
|
|
*/
|
|
|
|
const streamHttpEnd = (req, closeHandler = undefined) => (ids, listener) => {
|
|
req.on('close', () => {
|
|
ids.forEach(id => {
|
|
unsubscribe(id, listener);
|
|
});
|
|
|
|
if (closeHandler) {
|
|
closeHandler();
|
|
}
|
|
});
|
|
};
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @param {any} ws
|
|
* @param {string[]} streamName
|
|
* @returns {function(string, string): void}
|
|
*/
|
|
const streamToWs = (req, ws, streamName) => (event, payload) => {
|
|
if (ws.readyState !== ws.OPEN) {
|
|
log.error(req.requestId, 'Tried writing to closed socket');
|
|
return;
|
|
}
|
|
|
|
ws.send(JSON.stringify({ stream: streamName, event, payload }), (err) => {
|
|
if (err) {
|
|
log.error(req.requestId, `Failed to send to websocket: ${err}`);
|
|
}
|
|
});
|
|
};
|
|
|
|
/**
|
|
* @param {any} res
|
|
*/
|
|
const httpNotFound = res => {
|
|
res.writeHead(404, { 'Content-Type': 'application/json' });
|
|
res.end(JSON.stringify({ error: 'Not found' }));
|
|
};
|
|
|
|
app.use(setRequestId);
|
|
app.use(setRemoteAddress);
|
|
app.use(allowCrossDomain);
|
|
|
|
app.get('/api/v1/streaming/health', (req, res) => {
|
|
res.writeHead(200, { 'Content-Type': 'text/plain' });
|
|
res.end('OK');
|
|
});
|
|
|
|
app.get('/metrics', (req, res) => server.getConnections((err, count) => {
|
|
res.writeHeader(200, { 'Content-Type': 'application/openmetrics-text; version=1.0.0; charset=utf-8' });
|
|
res.write('# TYPE connected_clients gauge\n');
|
|
res.write('# HELP connected_clients The number of clients connected to the streaming server\n');
|
|
res.write(`connected_clients ${count}.0\n`);
|
|
res.write('# TYPE connected_channels gauge\n');
|
|
res.write('# HELP connected_channels The number of Redis channels the streaming server is subscribed to\n');
|
|
res.write(`connected_channels ${Object.keys(subs).length}.0\n`);
|
|
res.write('# TYPE pg_pool_total_connections gauge\n');
|
|
res.write('# HELP pg_pool_total_connections The total number of clients existing within the pool\n');
|
|
res.write(`pg_pool_total_connections ${pgPool.totalCount}.0\n`);
|
|
res.write('# TYPE pg_pool_idle_connections gauge\n');
|
|
res.write('# HELP pg_pool_idle_connections The number of clients which are not checked out but are currently idle in the pool\n');
|
|
res.write(`pg_pool_idle_connections ${pgPool.idleCount}.0\n`);
|
|
res.write('# TYPE pg_pool_waiting_queries gauge\n');
|
|
res.write('# HELP pg_pool_waiting_queries The number of queued requests waiting on a client when all clients are checked out\n');
|
|
res.write(`pg_pool_waiting_queries ${pgPool.waitingCount}.0\n`);
|
|
res.write('# EOF\n');
|
|
res.end();
|
|
}));
|
|
|
|
app.use(authenticationMiddleware);
|
|
app.use(errorMiddleware);
|
|
|
|
app.get('/api/v1/streaming/*', (req, res) => {
|
|
channelNameToIds(req, channelNameFromPath(req), req.query).then(({ channelIds, options }) => {
|
|
const onSend = streamToHttp(req, res);
|
|
const onEnd = streamHttpEnd(req, subscriptionHeartbeat(channelIds));
|
|
|
|
streamFrom(channelIds, req, onSend, onEnd, options.needsFiltering);
|
|
}).catch(err => {
|
|
log.verbose(req.requestId, 'Subscription error:', err.toString());
|
|
httpNotFound(res);
|
|
});
|
|
});
|
|
|
|
const wss = new WebSocket.Server({ server, verifyClient: wsVerifyClient });
|
|
|
|
/**
|
|
* @typedef StreamParams
|
|
* @property {string} [tag]
|
|
* @property {string} [list]
|
|
* @property {string} [only_media]
|
|
*/
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @returns {string[]}
|
|
*/
|
|
const channelsForUserStream = req => {
|
|
const arr = [`timeline:${req.accountId}`];
|
|
|
|
if (isInScope(req, ['crypto']) && req.deviceId) {
|
|
arr.push(`timeline:${req.accountId}:${req.deviceId}`);
|
|
}
|
|
|
|
if (isInScope(req, ['read', 'read:notifications'])) {
|
|
arr.push(`timeline:${req.accountId}:notifications`);
|
|
}
|
|
|
|
return arr;
|
|
};
|
|
|
|
/**
|
|
* See app/lib/ascii_folder.rb for the canon definitions
|
|
* of these constants
|
|
*/
|
|
const NON_ASCII_CHARS = 'ÀÁÂÃÄÅàáâãäåĀāĂ㥹ÇçĆćĈĉĊċČčÐðĎďĐđÈÉÊËèéêëĒēĔĕĖėĘęĚěĜĝĞğĠġĢģĤĥĦħÌÍÎÏìíîïĨĩĪīĬĭĮįİıĴĵĶķĸĹĺĻļĽľĿŀŁłÑñŃńŅņŇňʼnŊŋÒÓÔÕÖØòóôõöøŌōŎŏŐőŔŕŖŗŘřŚśŜŝŞşŠšſŢţŤťŦŧÙÚÛÜùúûüŨũŪūŬŭŮůŰűŲųŴŵÝýÿŶŷŸŹźŻżŽž';
|
|
const EQUIVALENT_ASCII_CHARS = 'AAAAAAaaaaaaAaAaAaCcCcCcCcCcDdDdDdEEEEeeeeEeEeEeEeEeGgGgGgGgHhHhIIIIiiiiIiIiIiIiIiJjKkkLlLlLlLlLlNnNnNnNnnNnOOOOOOooooooOoOoOoRrRrRrSsSsSsSssTtTtTtUUUUuuuuUuUuUuUuUuUuWwYyyYyYZzZzZz';
|
|
|
|
/**
|
|
* @param {string} str
|
|
* @returns {string}
|
|
*/
|
|
const foldToASCII = str => {
|
|
const regex = new RegExp(NON_ASCII_CHARS.split('').join('|'), 'g');
|
|
|
|
return str.replace(regex, match => {
|
|
const index = NON_ASCII_CHARS.indexOf(match);
|
|
return EQUIVALENT_ASCII_CHARS[index];
|
|
});
|
|
};
|
|
|
|
/**
|
|
* @param {string} str
|
|
* @returns {string}
|
|
*/
|
|
const normalizeHashtag = str => {
|
|
return foldToASCII(str.normalize('NFKC').toLowerCase()).replace(/[^\p{L}\p{N}_\u00b7\u200c]/gu, '');
|
|
};
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @param {string} name
|
|
* @param {StreamParams} params
|
|
* @returns {Promise.<{ channelIds: string[], options: { needsFiltering: boolean } }>}
|
|
*/
|
|
const channelNameToIds = (req, name, params) => new Promise((resolve, reject) => {
|
|
switch (name) {
|
|
case 'user':
|
|
resolve({
|
|
channelIds: channelsForUserStream(req),
|
|
options: { needsFiltering: false },
|
|
});
|
|
|
|
break;
|
|
case 'user:notification':
|
|
resolve({
|
|
channelIds: [`timeline:${req.accountId}:notifications`],
|
|
options: { needsFiltering: false },
|
|
});
|
|
|
|
break;
|
|
case 'public':
|
|
resolve({
|
|
channelIds: ['timeline:public'],
|
|
options: { needsFiltering: true },
|
|
});
|
|
|
|
break;
|
|
case 'public:local':
|
|
resolve({
|
|
channelIds: ['timeline:public:local'],
|
|
options: { needsFiltering: true },
|
|
});
|
|
|
|
break;
|
|
case 'public:remote':
|
|
resolve({
|
|
channelIds: ['timeline:public:remote'],
|
|
options: { needsFiltering: true },
|
|
});
|
|
|
|
break;
|
|
case 'public:media':
|
|
resolve({
|
|
channelIds: ['timeline:public:media'],
|
|
options: { needsFiltering: true },
|
|
});
|
|
|
|
break;
|
|
case 'public:local:media':
|
|
resolve({
|
|
channelIds: ['timeline:public:local:media'],
|
|
options: { needsFiltering: true },
|
|
});
|
|
|
|
break;
|
|
case 'public:remote:media':
|
|
resolve({
|
|
channelIds: ['timeline:public:remote:media'],
|
|
options: { needsFiltering: true },
|
|
});
|
|
|
|
break;
|
|
case 'direct':
|
|
resolve({
|
|
channelIds: [`timeline:direct:${req.accountId}`],
|
|
options: { needsFiltering: false },
|
|
});
|
|
|
|
break;
|
|
case 'hashtag':
|
|
if (!params.tag || params.tag.length === 0) {
|
|
reject('No tag for stream provided');
|
|
} else {
|
|
resolve({
|
|
channelIds: [`timeline:hashtag:${normalizeHashtag(params.tag)}`],
|
|
options: { needsFiltering: true },
|
|
});
|
|
}
|
|
|
|
break;
|
|
case 'hashtag:local':
|
|
if (!params.tag || params.tag.length === 0) {
|
|
reject('No tag for stream provided');
|
|
} else {
|
|
resolve({
|
|
channelIds: [`timeline:hashtag:${normalizeHashtag(params.tag)}:local`],
|
|
options: { needsFiltering: true },
|
|
});
|
|
}
|
|
|
|
break;
|
|
case 'list':
|
|
authorizeListAccess(params.list, req).then(() => {
|
|
resolve({
|
|
channelIds: [`timeline:list:${params.list}`],
|
|
options: { needsFiltering: false },
|
|
});
|
|
}).catch(() => {
|
|
reject('Not authorized to stream this list');
|
|
});
|
|
|
|
break;
|
|
default:
|
|
reject('Unknown stream type');
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @param {string} channelName
|
|
* @param {StreamParams} params
|
|
* @returns {string[]}
|
|
*/
|
|
const streamNameFromChannelName = (channelName, params) => {
|
|
if (channelName === 'list') {
|
|
return [channelName, params.list];
|
|
} else if (['hashtag', 'hashtag:local'].includes(channelName)) {
|
|
return [channelName, params.tag];
|
|
} else {
|
|
return [channelName];
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @typedef WebSocketSession
|
|
* @property {any} socket
|
|
* @property {any} request
|
|
* @property {Object.<string, { listener: SubscriptionListener, stopHeartbeat: function(): void }>} subscriptions
|
|
*/
|
|
|
|
/**
|
|
* @param {WebSocketSession} session
|
|
* @param {string} channelName
|
|
* @param {StreamParams} params
|
|
*/
|
|
const subscribeWebsocketToChannel = ({ socket, request, subscriptions }, channelName, params) =>
|
|
checkScopes(request, channelName).then(() => channelNameToIds(request, channelName, params)).then(({
|
|
channelIds,
|
|
options,
|
|
}) => {
|
|
if (subscriptions[channelIds.join(';')]) {
|
|
return;
|
|
}
|
|
|
|
const onSend = streamToWs(request, socket, streamNameFromChannelName(channelName, params));
|
|
const stopHeartbeat = subscriptionHeartbeat(channelIds);
|
|
const listener = streamFrom(channelIds, request, onSend, undefined, options.needsFiltering);
|
|
|
|
subscriptions[channelIds.join(';')] = {
|
|
listener,
|
|
stopHeartbeat,
|
|
};
|
|
}).catch(err => {
|
|
log.verbose(request.requestId, 'Subscription error:', err.toString());
|
|
socket.send(JSON.stringify({ error: err.toString() }));
|
|
});
|
|
|
|
/**
|
|
* @param {WebSocketSession} session
|
|
* @param {string} channelName
|
|
* @param {StreamParams} params
|
|
*/
|
|
const unsubscribeWebsocketFromChannel = ({ socket, request, subscriptions }, channelName, params) =>
|
|
channelNameToIds(request, channelName, params).then(({ channelIds }) => {
|
|
log.verbose(request.requestId, `Ending stream from ${channelIds.join(', ')} for ${request.accountId}`);
|
|
|
|
const subscription = subscriptions[channelIds.join(';')];
|
|
|
|
if (!subscription) {
|
|
return;
|
|
}
|
|
|
|
const { listener, stopHeartbeat } = subscription;
|
|
|
|
channelIds.forEach(channelId => {
|
|
unsubscribe(`${redisPrefix}${channelId}`, listener);
|
|
});
|
|
|
|
stopHeartbeat();
|
|
|
|
delete subscriptions[channelIds.join(';')];
|
|
}).catch(err => {
|
|
log.verbose(request.requestId, 'Unsubscription error:', err);
|
|
socket.send(JSON.stringify({ error: err.toString() }));
|
|
});
|
|
|
|
/**
|
|
* @param {WebSocketSession} session
|
|
*/
|
|
const subscribeWebsocketToSystemChannel = ({ socket, request, subscriptions }) => {
|
|
const accessTokenChannelId = `timeline:access_token:${request.accessTokenId}`;
|
|
const systemChannelId = `timeline:system:${request.accountId}`;
|
|
|
|
const listener = createSystemMessageListener(request, {
|
|
|
|
onKill() {
|
|
socket.close();
|
|
},
|
|
|
|
});
|
|
|
|
subscribe(`${redisPrefix}${accessTokenChannelId}`, listener);
|
|
subscribe(`${redisPrefix}${systemChannelId}`, listener);
|
|
|
|
subscriptions[accessTokenChannelId] = {
|
|
listener,
|
|
stopHeartbeat: () => {
|
|
},
|
|
};
|
|
|
|
subscriptions[systemChannelId] = {
|
|
listener,
|
|
stopHeartbeat: () => {
|
|
},
|
|
};
|
|
};
|
|
|
|
/**
|
|
* @param {string|string[]} arrayOrString
|
|
* @returns {string}
|
|
*/
|
|
const firstParam = arrayOrString => {
|
|
if (Array.isArray(arrayOrString)) {
|
|
return arrayOrString[0];
|
|
} else {
|
|
return arrayOrString;
|
|
}
|
|
};
|
|
|
|
wss.on('connection', (ws, req) => {
|
|
const location = url.parse(req.url, true);
|
|
|
|
req.requestId = uuid.v4();
|
|
req.remoteAddress = ws._socket.remoteAddress;
|
|
|
|
ws.isAlive = true;
|
|
|
|
ws.on('pong', () => {
|
|
ws.isAlive = true;
|
|
});
|
|
|
|
/**
|
|
* @type {WebSocketSession}
|
|
*/
|
|
const session = {
|
|
socket: ws,
|
|
request: req,
|
|
subscriptions: {},
|
|
};
|
|
|
|
const onEnd = () => {
|
|
const keys = Object.keys(session.subscriptions);
|
|
|
|
keys.forEach(channelIds => {
|
|
const { listener, stopHeartbeat } = session.subscriptions[channelIds];
|
|
|
|
channelIds.split(';').forEach(channelId => {
|
|
unsubscribe(`${redisPrefix}${channelId}`, listener);
|
|
});
|
|
|
|
stopHeartbeat();
|
|
});
|
|
};
|
|
|
|
ws.on('close', onEnd);
|
|
ws.on('error', onEnd);
|
|
|
|
ws.on('message', (data, isBinary) => {
|
|
if (isBinary) {
|
|
log.warn('socket', 'Received binary data, closing connection');
|
|
ws.close(1003, 'The mastodon streaming server does not support binary messages');
|
|
return;
|
|
}
|
|
const message = data.toString('utf8');
|
|
|
|
const json = parseJSON(message, session.request);
|
|
|
|
if (!json) return;
|
|
|
|
const { type, stream, ...params } = json;
|
|
|
|
if (type === 'subscribe') {
|
|
subscribeWebsocketToChannel(session, firstParam(stream), params);
|
|
} else if (type === 'unsubscribe') {
|
|
unsubscribeWebsocketFromChannel(session, firstParam(stream), params);
|
|
} else {
|
|
// Unknown action type
|
|
}
|
|
});
|
|
|
|
subscribeWebsocketToSystemChannel(session);
|
|
|
|
if (location.query.stream) {
|
|
subscribeWebsocketToChannel(session, firstParam(location.query.stream), location.query);
|
|
}
|
|
});
|
|
|
|
setInterval(() => {
|
|
wss.clients.forEach(ws => {
|
|
if (ws.isAlive === false) {
|
|
ws.terminate();
|
|
return;
|
|
}
|
|
|
|
ws.isAlive = false;
|
|
ws.ping('', false);
|
|
});
|
|
}, 30000);
|
|
|
|
attachServerWithConfig(server, address => {
|
|
log.warn(`Streaming API now listening on ${address}`);
|
|
});
|
|
|
|
const onExit = () => {
|
|
server.close();
|
|
process.exit(0);
|
|
};
|
|
|
|
const onError = (err) => {
|
|
log.error(err);
|
|
server.close();
|
|
process.exit(0);
|
|
};
|
|
|
|
process.on('SIGINT', onExit);
|
|
process.on('SIGTERM', onExit);
|
|
process.on('exit', onExit);
|
|
process.on('uncaughtException', onError);
|
|
};
|
|
|
|
/**
|
|
* @param {any} server
|
|
* @param {function(string): void} [onSuccess]
|
|
*/
|
|
const attachServerWithConfig = (server, onSuccess) => {
|
|
if (process.env.SOCKET || process.env.PORT && isNaN(+process.env.PORT)) {
|
|
server.listen(process.env.SOCKET || process.env.PORT, () => {
|
|
if (onSuccess) {
|
|
fs.chmodSync(server.address(), 0o666);
|
|
onSuccess(server.address());
|
|
}
|
|
});
|
|
} else {
|
|
server.listen(+process.env.PORT || 4000, process.env.BIND || '127.0.0.1', () => {
|
|
if (onSuccess) {
|
|
onSuccess(`${server.address().address}:${server.address().port}`);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
startServer();
|