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 { CONFIG, TRACKER_RATE_LIMITS } from '../initializers/constants'
8 import { VideoFileModel } from '../models/video/video-file'
9 import { parse } from 'url'
11 const TrackerServer = bitTorrentTracker.Server
13 const trackerRouter = express.Router()
16 let peersIpInfoHash = {}
19 const trackerServer = new TrackerServer({
24 filter: function (infoHash, params, cb) {
27 if (params.type === 'ws') {
30 ip = params.httpReq.ip
33 const key = ip + '-' + infoHash
35 peersIps[ip] = peersIps[ip] ? peersIps[ip] + 1 : 1
36 peersIpInfoHash[key] = peersIpInfoHash[key] ? peersIpInfoHash[key] + 1 : 1
38 if (peersIpInfoHash[key] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP_PER_INFOHASH) {
39 return cb(new Error(`Too many requests (${peersIpInfoHash[ key ]} of ip ${ip} for torrent ${infoHash}`))
42 VideoFileModel.isInfohashExists(infoHash)
44 if (exists === false) return cb(new Error(`Unknown infoHash ${infoHash}`))
51 trackerServer.on('error', function (err) {
52 logger.error('Error in tracker.', { err })
55 trackerServer.on('warning', function (err) {
56 logger.warn('Warning in tracker.', { err })
59 const onHttpRequest = trackerServer.onHttpRequest.bind(trackerServer)
60 trackerRouter.get('/tracker/announce', (req, res) => onHttpRequest(req, res, { action: 'announce' }))
61 trackerRouter.get('/tracker/scrape', (req, res) => onHttpRequest(req, res, { action: 'scrape' }))
63 function createWebsocketTrackerServer (app: express.Application) {
64 const server = http.createServer(app)
65 const wss = new WebSocketServer({ noServer: true })
67 wss.on('connection', function (ws, req) {
68 ws['ip'] = proxyAddr(req, CONFIG.TRUST_PROXY)
70 trackerServer.onWebSocketConnection(ws)
73 server.on('upgrade', (request, socket, head) => {
74 const pathname = parse(request.url).pathname
76 if (pathname === '/tracker/socket') {
77 wss.handleUpgrade(request, socket, head, ws => wss.emit('connection', ws, request))
80 // Don't destroy socket, we have Socket.IO too
86 // ---------------------------------------------------------------------------
90 createWebsocketTrackerServer
93 // ---------------------------------------------------------------------------
95 function runPeersChecker () {
97 logger.debug('Checking peers.')
99 for (const ip of Object.keys(peersIpInfoHash)) {
100 if (peersIps[ip] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP) {
101 logger.warn('Peer %s made abnormal requests (%d).', ip, peersIps[ip])
107 }, TRACKER_RATE_LIMITS.INTERVAL)