1 import { logger } from '../helpers/logger'
2 import * as express from 'express'
3 import * as http from 'http'
4 import * as bitTorrentTracker from 'bittorrent-tracker'
5 import * as proxyAddr from 'proxy-addr'
6 import { Server as WebSocketServer } from 'ws'
7 import { TRACKER_RATE_LIMITS } from '../initializers/constants'
8 import { VideoFileModel } from '../models/video/video-file'
9 import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
10 import { CONFIG } from '../initializers/config'
12 const TrackerServer = bitTorrentTracker.Server
14 const trackerRouter = express.Router()
17 let peersIpInfoHash = {}
20 const trackerServer = new TrackerServer({
25 filter: async function (infoHash, params, cb) {
26 if (CONFIG.TRACKER.ENABLED === false) {
27 return cb(new Error('Tracker is disabled on this instance.'))
32 if (params.type === 'ws') {
35 ip = params.httpReq.ip
38 const key = ip + '-' + infoHash
40 peersIps[ip] = peersIps[ip] ? peersIps[ip] + 1 : 1
41 peersIpInfoHash[key] = peersIpInfoHash[key] ? peersIpInfoHash[key] + 1 : 1
43 if (CONFIG.TRACKER.REJECT_TOO_MANY_ANNOUNCES && peersIpInfoHash[key] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP_PER_INFOHASH) {
44 return cb(new Error(`Too many requests (${peersIpInfoHash[key]} of ip ${ip} for torrent ${infoHash}`))
48 if (CONFIG.TRACKER.PRIVATE === false) return cb()
50 const videoFileExists = await VideoFileModel.doesInfohashExistCached(infoHash)
51 if (videoFileExists === true) return cb()
53 const playlistExists = await VideoStreamingPlaylistModel.doesInfohashExist(infoHash)
54 if (playlistExists === true) return cb()
56 return cb(new Error(`Unknown infoHash ${infoHash}`))
58 logger.error('Error in tracker filter.', { err })
64 if (CONFIG.TRACKER.ENABLED !== false) {
66 trackerServer.on('error', function (err) {
67 logger.error('Error in tracker.', { err })
70 trackerServer.on('warning', function (err) {
71 logger.warn('Warning in tracker.', { err })
75 const onHttpRequest = trackerServer.onHttpRequest.bind(trackerServer)
76 trackerRouter.get('/tracker/announce', (req, res) => onHttpRequest(req, res, { action: 'announce' }))
77 trackerRouter.get('/tracker/scrape', (req, res) => onHttpRequest(req, res, { action: 'scrape' }))
79 function createWebsocketTrackerServer (app: express.Application) {
80 const server = http.createServer(app)
81 const wss = new WebSocketServer({ noServer: true })
83 wss.on('connection', function (ws, req) {
84 ws['ip'] = proxyAddr(req, CONFIG.TRUST_PROXY)
86 trackerServer.onWebSocketConnection(ws)
89 server.on('upgrade', (request: express.Request, socket, head) => {
90 if (request.url === '/tracker/socket') {
91 wss.handleUpgrade(request, socket, head, ws => wss.emit('connection', ws, request))
94 // Don't destroy socket, we have Socket.IO too
100 // ---------------------------------------------------------------------------
104 createWebsocketTrackerServer
107 // ---------------------------------------------------------------------------
109 function runPeersChecker () {
111 logger.debug('Checking peers.')
113 for (const ip of Object.keys(peersIpInfoHash)) {
114 if (peersIps[ip] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP) {
115 logger.warn('Peer %s made abnormal requests (%d).', ip, peersIps[ip])
121 }, TRACKER_RATE_LIMITS.INTERVAL)