1044 lines
28 KiB
JavaScript
1044 lines
28 KiB
JavaScript
// @ts-check
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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 { WebSocketServer } = require('@clusterws/cws');
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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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const alwaysRequireAuth = process.env.LIMITED_FEDERATION_MODE === 'true' || process.env.WHITELIST_MODE === 'true' || process.env.AUTHORIZED_FETCH === 'true';
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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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/**
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* @param {string} dbUrl
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* @return {Object.<string, any>}
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*/
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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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/**
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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 = (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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/**
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* @param {string} json
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* @return {Object.<string, any>|null}
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*/
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const parseJSON = (json) => {
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try {
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return JSON.parse(json);
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} catch (err) {
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log.error(err);
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return null;
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}
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};
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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 || 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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const redisSubscribeClient = redisUrlToClient(redisParams, process.env.REDIS_URL);
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const redisClient = redisUrlToClient(redisParams, process.env.REDIS_URL);
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/**
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* @type {Object.<string, Array.<function(string): void>>}
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*/
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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 ${channel}`);
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if (!callbacks) {
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return;
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}
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callbacks.forEach(callback => callback(message));
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});
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/**
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* @param {string[]} channels
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* @return {function(): void}
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*/
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const subscriptionHeartbeat = channels => {
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const interval = 6 * 60;
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const tellSubscribed = () => {
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channels.forEach(channel => redisClient.set(`${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} channel
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* @param {function(string): void} 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);
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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 {function(string): void} 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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* @return {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}
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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}
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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}
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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 {string} token
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* @param {any} req
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* @return {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.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.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.allowNotifications = req.scopes.some(scope => ['read', 'read:notifications'].includes(scope));
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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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* @param {boolean=} required
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* @return {Promise.<void>}
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*/
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const accountFromRequest = (req, required = true) => 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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if (required) {
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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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} else {
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resolve();
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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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resolve(accountFromToken(token, req));
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});
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/**
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* @param {any} req
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* @return {string}
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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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}
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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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* @return {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 (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, alwaysRequireAuth).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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* @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, alwaysRequireAuth).then(() => checkScopes(req, channelNameFromPath(req))).then(() => {
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next();
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}).catch(err => {
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next(err);
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});
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};
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/**
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* @param {Error} err
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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 errorMiddleware = (err, req, res, next) => {
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log.error(req.requestId, err.toString());
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if (res.headersSent) {
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return next(err);
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}
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res.writeHead(err.status || 500, { 'Content-Type': 'application/json' });
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res.end(JSON.stringify({ error: err.status ? err.toString() : 'An unexpected error occurred' }));
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};
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/**
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* @param {array}
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* @param {number=} shift
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* @return {string}
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*/
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const placeholders = (arr, shift = 0) => arr.map((_, i) => `$${i + 1 + shift}`).join(', ');
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/**
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* @param {string} listId
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* @param {any} req
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* @return {Promise.<void>}
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*/
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const authorizeListAccess = (listId, req) => new Promise((resolve, reject) => {
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const { accountId } = req;
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pgPool.connect((err, client, done) => {
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if (err) {
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reject();
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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', [listId], (err, result) => {
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done();
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if (err || result.rows.length === 0 || result.rows[0].account_id !== accountId) {
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reject();
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return;
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}
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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 {string[]} ids
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* @param {any} req
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* @param {function(string, string): void} output
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* @param {function(string[], function(string): void): void} attachCloseHandler
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* @param {boolean=} needsFiltering
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* @param {boolean=} notificationOnly
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* @return {function(string): void}
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*/
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const streamFrom = (ids, 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 ${ids.join(', ')} for ${accountId}${streamType}`);
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const listener = message => {
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const json = parseJSON(message);
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if (!json) return;
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const { event, payload, queued_at } = json;
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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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if (event === 'notification' && !req.allowNotifications) {
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return;
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|
}
|
|
|
|
// Only messages that may require filtering are statuses, since notifications
|
|
// are already personalized and deletes do not matter
|
|
if (!needsFiltering || event !== 'update') {
|
|
transmit();
|
|
return;
|
|
}
|
|
|
|
const unpackedPayload = payload;
|
|
const targetAccountIds = [unpackedPayload.account.id].concat(unpackedPayload.mentions.map(item => item.id));
|
|
const accountDomain = unpackedPayload.account.acct.split('@')[1];
|
|
|
|
if (Array.isArray(req.chosenLanguages) && unpackedPayload.language !== null && req.chosenLanguages.indexOf(unpackedPayload.language) === -1) {
|
|
log.silly(req.requestId, `Message ${unpackedPayload.id} filtered by language (${unpackedPayload.language})`);
|
|
return;
|
|
}
|
|
|
|
// When the account is not logged in, it is not necessary to confirm the block or mute
|
|
if (!req.accountId) {
|
|
transmit();
|
|
return;
|
|
}
|
|
|
|
pgPool.connect((err, client, done) => {
|
|
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, unpackedPayload.account.id].concat(targetAccountIds)),
|
|
];
|
|
|
|
if (accountDomain) {
|
|
queries.push(client.query('SELECT 1 FROM account_domain_blocks WHERE account_id = $1 AND domain = $2', [req.accountId, accountDomain]));
|
|
}
|
|
|
|
Promise.all(queries).then(values => {
|
|
done();
|
|
|
|
if (values[0].rows.length > 0 || (values.length > 1 && values[1].rows.length > 0)) {
|
|
return;
|
|
}
|
|
|
|
transmit();
|
|
}).catch(err => {
|
|
done();
|
|
log.error(err);
|
|
});
|
|
});
|
|
};
|
|
|
|
ids.forEach(id => {
|
|
subscribe(`${redisPrefix}${id}`, listener);
|
|
});
|
|
|
|
if (attachCloseHandler) {
|
|
attachCloseHandler(ids.map(id => `${redisPrefix}${id}`), listener);
|
|
}
|
|
|
|
return listener;
|
|
};
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @param {any} res
|
|
* @return {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]
|
|
* @return {function(string[], function(string): 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
|
|
* @return {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 }));
|
|
};
|
|
|
|
/**
|
|
* @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.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, options.notificationOnly);
|
|
}).catch(err => {
|
|
log.verbose(req.requestId, 'Subscription error:', err.toString());
|
|
httpNotFound(res);
|
|
});
|
|
});
|
|
|
|
const wss = new WebSocketServer({ server, verifyClient: wsVerifyClient });
|
|
|
|
/**
|
|
* @typedef StreamParams
|
|
* @property {string} [tag]
|
|
* @property {string} [list]
|
|
* @property {string} [only_media]
|
|
*/
|
|
|
|
/**
|
|
* @param {any} req
|
|
* @param {string} name
|
|
* @param {StreamParams} params
|
|
* @return {Promise.<{ channelIds: string[], options: { needsFiltering: boolean, notificationOnly: boolean } }>}
|
|
*/
|
|
const channelNameToIds = (req, name, params) => new Promise((resolve, reject) => {
|
|
switch(name) {
|
|
case 'user':
|
|
resolve({
|
|
channelIds: req.deviceId ? [`timeline:${req.accountId}`, `timeline:${req.accountId}:${req.deviceId}`] : [`timeline:${req.accountId}`],
|
|
options: { needsFiltering: false, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'user:notification':
|
|
resolve({
|
|
channelIds: [`timeline:${req.accountId}`],
|
|
options: { needsFiltering: false, notificationOnly: true },
|
|
});
|
|
|
|
break;
|
|
case 'public':
|
|
resolve({
|
|
channelIds: ['timeline:public'],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'public:local':
|
|
resolve({
|
|
channelIds: ['timeline:public:local'],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'public:remote':
|
|
resolve({
|
|
channelIds: ['timeline:public:remote'],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'public:media':
|
|
resolve({
|
|
channelIds: ['timeline:public:media'],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'public:local:media':
|
|
resolve({
|
|
channelIds: ['timeline:public:local:media'],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'public:remote:media':
|
|
resolve({
|
|
channelIds: ['timeline:public:remote:media'],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'direct':
|
|
resolve({
|
|
channelIds: [`timeline:direct:${req.accountId}`],
|
|
options: { needsFiltering: false, notificationOnly: false },
|
|
});
|
|
|
|
break;
|
|
case 'hashtag':
|
|
if (!params.tag || params.tag.length === 0) {
|
|
reject('No tag for stream provided');
|
|
} else {
|
|
resolve({
|
|
channelIds: [`timeline:hashtag:${params.tag.toLowerCase()}`],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
}
|
|
|
|
break;
|
|
case 'hashtag:local':
|
|
if (!params.tag || params.tag.length === 0) {
|
|
reject('No tag for stream provided');
|
|
} else {
|
|
resolve({
|
|
channelIds: [`timeline:hashtag:${params.tag.toLowerCase()}:local`],
|
|
options: { needsFiltering: true, notificationOnly: false },
|
|
});
|
|
}
|
|
|
|
break;
|
|
case 'list':
|
|
authorizeListAccess(params.list, req).then(() => {
|
|
resolve({
|
|
channelIds: [`timeline:list:${params.list}`],
|
|
options: { needsFiltering: false, notificationOnly: false },
|
|
});
|
|
}).catch(() => {
|
|
reject('Not authorized to stream this list');
|
|
});
|
|
|
|
break;
|
|
default:
|
|
reject('Unknown stream type');
|
|
}
|
|
});
|
|
|
|
/**
|
|
* @param {string} channelName
|
|
* @param {StreamParams} params
|
|
* @return {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: function(string): void, 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, options.notificationOnly);
|
|
|
|
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}${channelId}`, listener);
|
|
});
|
|
|
|
stopHeartbeat();
|
|
|
|
delete subscriptions[channelIds.join(';')];
|
|
}).catch(err => {
|
|
log.verbose(request.requestId, 'Unsubscription error:', err);
|
|
socket.send(JSON.stringify({ error: err.toString() }));
|
|
});
|
|
|
|
/**
|
|
* @param {string|string[]} arrayOrString
|
|
* @return {string}
|
|
*/
|
|
const firstParam = arrayOrString => {
|
|
if (Array.isArray(arrayOrString)) {
|
|
return arrayOrString[0];
|
|
} else {
|
|
return arrayOrString;
|
|
}
|
|
};
|
|
|
|
wss.on('connection', (ws, req) => {
|
|
const location = url.parse(req.url, true);
|
|
|
|
req.requestId = uuid.v4();
|
|
req.remoteAddress = ws._socket.remoteAddress;
|
|
|
|
/**
|
|
* @type {WebSocketSession}
|
|
*/
|
|
const session = {
|
|
socket: ws,
|
|
request: req,
|
|
subscriptions: {},
|
|
};
|
|
|
|
const onEnd = () => {
|
|
const keys = Object.keys(session.subscriptions);
|
|
|
|
keys.forEach(channelIds => {
|
|
const { listener, stopHeartbeat } = session.subscriptions[channelIds];
|
|
|
|
channelIds.split(';').forEach(channelId => {
|
|
unsubscribe(`${redisPrefix}${channelId}`, listener);
|
|
});
|
|
|
|
stopHeartbeat();
|
|
});
|
|
};
|
|
|
|
ws.on('close', onEnd);
|
|
ws.on('error', onEnd);
|
|
|
|
ws.on('message', data => {
|
|
const json = parseJSON(data);
|
|
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
|
|
}
|
|
});
|
|
|
|
if (location.query.stream) {
|
|
subscribeWebsocketToChannel(session, firstParam(location.query.stream), location.query);
|
|
}
|
|
});
|
|
|
|
wss.startAutoPing(30000);
|
|
|
|
attachServerWithConfig(server, address => {
|
|
log.info(`Worker ${workerId} now listening on ${address}`);
|
|
});
|
|
|
|
const onExit = () => {
|
|
log.info(`Worker ${workerId} exiting, bye bye`);
|
|
server.close();
|
|
process.exit(0);
|
|
};
|
|
|
|
const onError = (err) => {
|
|
log.error(err);
|
|
server.close();
|
|
process.exit(0);
|
|
};
|
|
|
|
process.on('SIGINT', onExit);
|
|
process.on('SIGTERM', onExit);
|
|
process.on('exit', onExit);
|
|
process.on('uncaughtException', onError);
|
|
};
|
|
|
|
/**
|
|
* @param {any} server
|
|
* @param {function(string): void} [onSuccess]
|
|
*/
|
|
const attachServerWithConfig = (server, onSuccess) => {
|
|
if (process.env.SOCKET || process.env.PORT && isNaN(+process.env.PORT)) {
|
|
server.listen(process.env.SOCKET || process.env.PORT, () => {
|
|
if (onSuccess) {
|
|
fs.chmodSync(server.address(), 0o666);
|
|
onSuccess(server.address());
|
|
}
|
|
});
|
|
} else {
|
|
server.listen(+process.env.PORT || 4000, process.env.BIND || '127.0.0.1', () => {
|
|
if (onSuccess) {
|
|
onSuccess(`${server.address().address}:${server.address().port}`);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @param {function(Error=): void} onSuccess
|
|
*/
|
|
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,
|
|
});
|
|
});
|