692 lines
20 KiB
JavaScript
692 lines
20 KiB
JavaScript
const os = require('os');
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const throng = require('throng');
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const dotenv = require('dotenv');
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const express = require('express');
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const http = require('http');
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const redis = require('redis');
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const pg = require('pg');
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const log = require('npmlog');
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const url = require('url');
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const WebSocket = require('uws');
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const uuid = require('uuid');
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const fs = require('fs');
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const env = process.env.NODE_ENV || 'development';
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dotenv.config({
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path: env === 'production' ? '.env.production' : '.env',
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});
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log.level = process.env.LOG_LEVEL || 'verbose';
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const dbUrlToConfig = (dbUrl) => {
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if (!dbUrl) {
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return {};
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}
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const params = url.parse(dbUrl, true);
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const config = {};
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if (params.auth) {
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[config.user, config.password] = params.auth.split(':');
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}
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if (params.hostname) {
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config.host = params.hostname;
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}
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if (params.port) {
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config.port = params.port;
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}
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if (params.pathname) {
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config.database = params.pathname.split('/')[1];
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}
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const ssl = params.query && params.query.ssl;
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if (ssl && ssl === 'true' || ssl === '1') {
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config.ssl = true;
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}
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return config;
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};
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const redisUrlToClient = (defaultConfig, redisUrl) => {
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const config = defaultConfig;
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if (!redisUrl) {
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return redis.createClient(config);
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}
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if (redisUrl.startsWith('unix://')) {
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return redis.createClient(redisUrl.slice(7), config);
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}
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return redis.createClient(Object.assign(config, {
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url: redisUrl,
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}));
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};
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const numWorkers = +process.env.STREAMING_CLUSTER_NUM || (env === 'development' ? 1 : Math.max(os.cpus().length - 1, 1));
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const startMaster = () => {
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if (!process.env.SOCKET && process.env.PORT && isNaN(+process.env.PORT)) {
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log.warn('UNIX domain socket is now supported by using SOCKET. Please migrate from PORT hack.');
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}
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log.info(`Starting streaming API server master with ${numWorkers} workers`);
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};
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const startWorker = (workerId) => {
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log.info(`Starting worker ${workerId}`);
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const pgConfigs = {
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development: {
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user: process.env.DB_USER || pg.defaults.user,
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password: process.env.DB_PASS || pg.defaults.password,
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database: process.env.DB_NAME || 'mastodon_development',
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host: process.env.DB_HOST || pg.defaults.host,
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port: process.env.DB_PORT || pg.defaults.port,
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max: 10,
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},
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production: {
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user: process.env.DB_USER || 'mastodon',
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password: process.env.DB_PASS || '',
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database: process.env.DB_NAME || 'mastodon_production',
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host: process.env.DB_HOST || 'localhost',
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port: process.env.DB_PORT || 5432,
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max: 10,
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},
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};
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if (!!process.env.DB_SSLMODE && process.env.DB_SSLMODE !== 'disable') {
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pgConfigs.development.ssl = true;
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pgConfigs.production.ssl = true;
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}
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const app = express();
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app.set('trusted proxy', process.env.TRUSTED_PROXY_IP || 'loopback,uniquelocal');
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const pgPool = new pg.Pool(Object.assign(pgConfigs[env], dbUrlToConfig(process.env.DATABASE_URL)));
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const server = http.createServer(app);
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const redisNamespace = process.env.REDIS_NAMESPACE || null;
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const redisParams = {
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host: process.env.REDIS_HOST || '127.0.0.1',
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port: process.env.REDIS_PORT || 6379,
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db: process.env.REDIS_DB || 0,
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password: process.env.REDIS_PASSWORD,
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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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const redisSubscribeClient = redisUrlToClient(redisParams, process.env.REDIS_URL);
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const redisClient = redisUrlToClient(redisParams, process.env.REDIS_URL);
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const subs = {};
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redisSubscribeClient.on('message', (channel, message) => {
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const callbacks = subs[channel];
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log.silly(`New message on channel ${channel}`);
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if (!callbacks) {
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return;
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}
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callbacks.forEach(callback => callback(message));
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});
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const subscriptionHeartbeat = (channel) => {
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const interval = 6*60;
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const tellSubscribed = () => {
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redisClient.set(`${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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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);
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}
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subs[channel].push(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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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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}
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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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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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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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const accountFromToken = (token, req, next) => {
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pgPool.connect((err, client, done) => {
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if (err) {
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next(err);
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return;
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}
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client.query('SELECT oauth_access_tokens.resource_owner_id, users.account_id, users.chosen_languages FROM oauth_access_tokens INNER JOIN users ON oauth_access_tokens.resource_owner_id = users.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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next(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.statusCode = 401;
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next(err);
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return;
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}
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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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next();
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});
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});
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};
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const accountFromRequest = (req, next, required = true) => {
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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;
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if (!authorization && !accessToken) {
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if (required) {
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const err = new Error('Missing access token');
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err.statusCode = 401;
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next(err);
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return;
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} else {
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next();
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return;
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}
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}
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const token = authorization ? authorization.replace(/^Bearer /, '') : accessToken;
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accountFromToken(token, req, next);
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};
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const PUBLIC_STREAMS = [
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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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'hashtag',
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'hashtag:local',
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];
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const wsVerifyClient = (info, cb) => {
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const location = url.parse(info.req.url, true);
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const authRequired = !PUBLIC_STREAMS.some(stream => stream === location.query.stream);
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accountFromRequest(info.req, err => {
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if (!err) {
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cb(true, undefined, undefined);
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} else {
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log.error(info.req.requestId, err.toString());
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cb(false, 401, 'Unauthorized');
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}
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}, authRequired);
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};
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const PUBLIC_ENDPOINTS = [
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'/api/v1/streaming/public',
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'/api/v1/streaming/public/local',
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'/api/v1/streaming/hashtag',
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'/api/v1/streaming/hashtag/local',
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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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const authRequired = !PUBLIC_ENDPOINTS.some(endpoint => endpoint === req.path);
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accountFromRequest(req, next, authRequired);
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};
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const errorMiddleware = (err, req, res, {}) => {
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log.error(req.requestId, err.toString());
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res.writeHead(err.statusCode || 500, { 'Content-Type': 'application/json' });
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res.end(JSON.stringify({ error: err.statusCode ? err.toString() : 'An unexpected error occurred' }));
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};
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const placeholders = (arr, shift = 0) => arr.map((_, i) => `$${i + 1 + shift}`).join(', ');
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const authorizeListAccess = (id, req, next) => {
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pgPool.connect((err, client, done) => {
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if (err) {
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next(false);
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return;
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}
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client.query('SELECT id, account_id FROM lists WHERE id = $1 LIMIT 1', [id], (err, result) => {
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done();
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if (err || result.rows.length === 0 || result.rows[0].account_id !== req.accountId) {
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next(false);
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return;
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}
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next(true);
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});
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});
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};
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const streamFrom = (id, req, output, attachCloseHandler, needsFiltering = false, notificationOnly = false) => {
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const accountId = req.accountId || req.remoteAddress;
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const streamType = notificationOnly ? ' (notification)' : '';
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log.verbose(req.requestId, `Starting stream from ${id} for ${accountId}${streamType}`);
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const listener = message => {
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const { event, payload, queued_at } = JSON.parse(message);
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const transmit = () => {
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const now = new Date().getTime();
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const delta = now - queued_at;
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const encodedPayload = typeof payload === 'object' ? JSON.stringify(payload) : payload;
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log.silly(req.requestId, `Transmitting for ${accountId}: ${event} ${encodedPayload} Delay: ${delta}ms`);
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output(event, encodedPayload);
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};
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if (notificationOnly && event !== 'notification') {
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return;
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}
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// Only messages that may require filtering are statuses, since notifications
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// are already personalized and deletes do not matter
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if (!needsFiltering || event !== 'update') {
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transmit();
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return;
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}
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const unpackedPayload = payload;
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const targetAccountIds = [unpackedPayload.account.id].concat(unpackedPayload.mentions.map(item => item.id));
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const accountDomain = unpackedPayload.account.acct.split('@')[1];
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if (Array.isArray(req.chosenLanguages) && unpackedPayload.language !== null && req.chosenLanguages.indexOf(unpackedPayload.language) === -1) {
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log.silly(req.requestId, `Message ${unpackedPayload.id} filtered by language (${unpackedPayload.language})`);
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return;
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}
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// When the account is not logged in, it is not necessary to confirm the block or mute
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if (!req.accountId) {
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transmit();
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return;
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}
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pgPool.connect((err, client, done) => {
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if (err) {
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log.error(err);
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return;
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}
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const queries = [
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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, unpackedPayload.account.id].concat(targetAccountIds)),
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];
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if (accountDomain) {
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queries.push(client.query('SELECT 1 FROM account_domain_blocks WHERE account_id = $1 AND domain = $2', [req.accountId, accountDomain]));
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}
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Promise.all(queries).then(values => {
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done();
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if (values[0].rows.length > 0 || (values.length > 1 && values[1].rows.length > 0)) {
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return;
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}
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transmit();
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}).catch(err => {
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done();
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log.error(err);
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});
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});
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};
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subscribe(`${redisPrefix}${id}`, listener);
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attachCloseHandler(`${redisPrefix}${id}`, listener);
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};
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// Setup stream output to HTTP
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const streamToHttp = (req, res) => {
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const accountId = req.accountId || req.remoteAddress;
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res.setHeader('Content-Type', 'text/event-stream');
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res.setHeader('Transfer-Encoding', 'chunked');
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const heartbeat = setInterval(() => res.write(':thump\n'), 15000);
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req.on('close', () => {
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log.verbose(req.requestId, `Ending stream for ${accountId}`);
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clearInterval(heartbeat);
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});
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return (event, payload) => {
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res.write(`event: ${event}\n`);
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res.write(`data: ${payload}\n\n`);
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};
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};
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// Setup stream end for HTTP
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const streamHttpEnd = (req, closeHandler = false) => (id, listener) => {
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req.on('close', () => {
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unsubscribe(id, listener);
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if (closeHandler) {
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closeHandler();
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}
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});
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};
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// Setup stream output to WebSockets
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const streamToWs = (req, ws) => (event, payload) => {
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if (ws.readyState !== ws.OPEN) {
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log.error(req.requestId, 'Tried writing to closed socket');
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return;
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}
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ws.send(JSON.stringify({ event, payload }));
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};
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// Setup stream end for WebSockets
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const streamWsEnd = (req, ws, closeHandler = false) => (id, listener) => {
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const accountId = req.accountId || req.remoteAddress;
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ws.on('close', () => {
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log.verbose(req.requestId, `Ending stream for ${accountId}`);
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unsubscribe(id, listener);
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if (closeHandler) {
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closeHandler();
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}
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});
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ws.on('error', () => {
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log.verbose(req.requestId, `Ending stream for ${accountId}`);
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unsubscribe(id, listener);
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if (closeHandler) {
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closeHandler();
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}
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});
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};
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const httpNotFound = res => {
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res.writeHead(404, { 'Content-Type': 'application/json' });
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res.end(JSON.stringify({ error: 'Not found' }));
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};
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app.use(setRequestId);
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app.use(setRemoteAddress);
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app.use(allowCrossDomain);
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app.get('/api/v1/streaming/health', (req, res) => {
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res.writeHead(200, { 'Content-Type': 'text/plain' });
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res.end('OK');
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});
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app.use(authenticationMiddleware);
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app.use(errorMiddleware);
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app.get('/api/v1/streaming/user', (req, res) => {
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const channel = `timeline:${req.accountId}`;
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streamFrom(channel, req, streamToHttp(req, res), streamHttpEnd(req, subscriptionHeartbeat(channel)));
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});
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app.get('/api/v1/streaming/user/notification', (req, res) => {
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streamFrom(`timeline:${req.accountId}`, req, streamToHttp(req, res), streamHttpEnd(req), false, true);
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});
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app.get('/api/v1/streaming/public', (req, res) => {
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const onlyMedia = req.query.only_media === '1' || req.query.only_media === 'true';
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const channel = onlyMedia ? 'timeline:public:media' : 'timeline:public';
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streamFrom(channel, req, streamToHttp(req, res), streamHttpEnd(req), true);
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});
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app.get('/api/v1/streaming/public/local', (req, res) => {
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const onlyMedia = req.query.only_media === '1' || req.query.only_media === 'true';
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const channel = onlyMedia ? 'timeline:public:local:media' : 'timeline:public:local';
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streamFrom(channel, req, streamToHttp(req, res), streamHttpEnd(req), true);
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});
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app.get('/api/v1/streaming/direct', (req, res) => {
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const channel = `timeline:direct:${req.accountId}`;
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streamFrom(channel, req, streamToHttp(req, res), streamHttpEnd(req, subscriptionHeartbeat(channel)), true);
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});
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app.get('/api/v1/streaming/hashtag', (req, res) => {
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const { tag } = req.query;
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if (!tag || tag.length === 0) {
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httpNotFound(res);
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return;
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}
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streamFrom(`timeline:hashtag:${tag.toLowerCase()}`, req, streamToHttp(req, res), streamHttpEnd(req), true);
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});
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app.get('/api/v1/streaming/hashtag/local', (req, res) => {
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const { tag } = req.query;
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if (!tag || tag.length === 0) {
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httpNotFound(res);
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return;
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}
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streamFrom(`timeline:hashtag:${tag.toLowerCase()}:local`, req, streamToHttp(req, res), streamHttpEnd(req), true);
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});
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app.get('/api/v1/streaming/list', (req, res) => {
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const listId = req.query.list;
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authorizeListAccess(listId, req, authorized => {
|
|
if (!authorized) {
|
|
httpNotFound(res);
|
|
return;
|
|
}
|
|
|
|
const channel = `timeline:list:${listId}`;
|
|
streamFrom(channel, req, streamToHttp(req, res), streamHttpEnd(req, subscriptionHeartbeat(channel)));
|
|
});
|
|
});
|
|
|
|
const wss = new WebSocket.Server({ server, verifyClient: wsVerifyClient });
|
|
|
|
wss.on('connection', ws => {
|
|
const req = ws.upgradeReq;
|
|
const location = url.parse(req.url, true);
|
|
req.requestId = uuid.v4();
|
|
req.remoteAddress = ws._socket.remoteAddress;
|
|
|
|
ws.isAlive = true;
|
|
|
|
ws.on('pong', () => {
|
|
ws.isAlive = true;
|
|
});
|
|
|
|
let channel;
|
|
|
|
switch(location.query.stream) {
|
|
case 'user':
|
|
channel = `timeline:${req.accountId}`;
|
|
streamFrom(channel, req, streamToWs(req, ws), streamWsEnd(req, ws, subscriptionHeartbeat(channel)));
|
|
break;
|
|
case 'user:notification':
|
|
streamFrom(`timeline:${req.accountId}`, req, streamToWs(req, ws), streamWsEnd(req, ws), false, true);
|
|
break;
|
|
case 'public':
|
|
streamFrom('timeline:public', req, streamToWs(req, ws), streamWsEnd(req, ws), true);
|
|
break;
|
|
case 'public:local':
|
|
streamFrom('timeline:public:local', req, streamToWs(req, ws), streamWsEnd(req, ws), true);
|
|
break;
|
|
case 'public:media':
|
|
streamFrom('timeline:public:media', req, streamToWs(req, ws), streamWsEnd(req, ws), true);
|
|
break;
|
|
case 'public:local:media':
|
|
streamFrom('timeline:public:local:media', req, streamToWs(req, ws), streamWsEnd(req, ws), true);
|
|
break;
|
|
case 'direct':
|
|
channel = `timeline:direct:${req.accountId}`;
|
|
streamFrom(channel, req, streamToWs(req, ws), streamWsEnd(req, ws, subscriptionHeartbeat(channel)), true);
|
|
break;
|
|
case 'hashtag':
|
|
if (!location.query.tag || location.query.tag.length === 0) {
|
|
ws.close();
|
|
return;
|
|
}
|
|
|
|
streamFrom(`timeline:hashtag:${location.query.tag.toLowerCase()}`, req, streamToWs(req, ws), streamWsEnd(req, ws), true);
|
|
break;
|
|
case 'hashtag:local':
|
|
if (!location.query.tag || location.query.tag.length === 0) {
|
|
ws.close();
|
|
return;
|
|
}
|
|
|
|
streamFrom(`timeline:hashtag:${location.query.tag.toLowerCase()}:local`, req, streamToWs(req, ws), streamWsEnd(req, ws), true);
|
|
break;
|
|
case 'list':
|
|
const listId = location.query.list;
|
|
|
|
authorizeListAccess(listId, req, authorized => {
|
|
if (!authorized) {
|
|
ws.close();
|
|
return;
|
|
}
|
|
|
|
channel = `timeline:list:${listId}`;
|
|
streamFrom(channel, req, streamToWs(req, ws), streamWsEnd(req, ws, subscriptionHeartbeat(channel)));
|
|
});
|
|
break;
|
|
default:
|
|
ws.close();
|
|
}
|
|
});
|
|
|
|
setInterval(() => {
|
|
wss.clients.forEach(ws => {
|
|
if (ws.isAlive === false) {
|
|
ws.terminate();
|
|
return;
|
|
}
|
|
|
|
ws.isAlive = false;
|
|
ws.ping('', false, true);
|
|
});
|
|
}, 30000);
|
|
|
|
attachServerWithConfig(server, address => {
|
|
log.info(`Worker ${workerId} now listening on ${address}`);
|
|
});
|
|
|
|
const onExit = () => {
|
|
log.info(`Worker ${workerId} exiting, bye bye`);
|
|
server.close();
|
|
process.exit(0);
|
|
};
|
|
|
|
const onError = (err) => {
|
|
log.error(err);
|
|
server.close();
|
|
process.exit(0);
|
|
};
|
|
|
|
process.on('SIGINT', onExit);
|
|
process.on('SIGTERM', onExit);
|
|
process.on('exit', onExit);
|
|
process.on('uncaughtException', onError);
|
|
};
|
|
|
|
const attachServerWithConfig = (server, onSuccess) => {
|
|
if (process.env.SOCKET || process.env.PORT && isNaN(+process.env.PORT)) {
|
|
server.listen(process.env.SOCKET || process.env.PORT, () => {
|
|
if (onSuccess) {
|
|
fs.chmodSync(server.address(), 0o666);
|
|
onSuccess(server.address());
|
|
}
|
|
});
|
|
} else {
|
|
server.listen(+process.env.PORT || 4000, process.env.BIND || '0.0.0.0', () => {
|
|
if (onSuccess) {
|
|
onSuccess(`${server.address().address}:${server.address().port}`);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
const onPortAvailable = onSuccess => {
|
|
const testServer = http.createServer();
|
|
|
|
testServer.once('error', err => {
|
|
onSuccess(err);
|
|
});
|
|
|
|
testServer.once('listening', () => {
|
|
testServer.once('close', () => onSuccess());
|
|
testServer.close();
|
|
});
|
|
|
|
attachServerWithConfig(testServer);
|
|
};
|
|
|
|
onPortAvailable(err => {
|
|
if (err) {
|
|
log.error('Could not start server, the port or socket is in use');
|
|
return;
|
|
}
|
|
|
|
throng({
|
|
workers: numWorkers,
|
|
lifetime: Infinity,
|
|
start: startWorker,
|
|
master: startMaster,
|
|
});
|
|
});
|