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'
10 import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
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) {
28 if (params.type === 'ws') {
31 ip = params.httpReq.ip
34 const key = ip + '-' + infoHash
36 peersIps[ ip ] = peersIps[ ip ] ? peersIps[ ip ] + 1 : 1
37 peersIpInfoHash[ key ] = peersIpInfoHash[ key ] ? peersIpInfoHash[ key ] + 1 : 1
39 if (peersIpInfoHash[ key ] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP_PER_INFOHASH) {
40 return cb(new Error(`Too many requests (${peersIpInfoHash[ key ]} of ip ${ip} for torrent ${infoHash}`))
44 const videoFileExists = await VideoFileModel.doesInfohashExist(infoHash)
45 if (videoFileExists === true) return cb()
47 const playlistExists = await VideoStreamingPlaylistModel.doesInfohashExist(infoHash)
48 if (playlistExists === true) return cb()
50 return cb(new Error(`Unknown infoHash ${infoHash}`))
52 logger.error('Error in tracker filter.', { err })
58 trackerServer.on('error', function (err) {
59 logger.error('Error in tracker.', { err })
62 trackerServer.on('warning', function (err) {
63 logger.warn('Warning in tracker.', { err })
66 const onHttpRequest = trackerServer.onHttpRequest.bind(trackerServer)
67 trackerRouter.get('/tracker/announce', (req, res) => onHttpRequest(req, res, { action: 'announce' }))
68 trackerRouter.get('/tracker/scrape', (req, res) => onHttpRequest(req, res, { action: 'scrape' }))
70 function createWebsocketTrackerServer (app: express.Application) {
71 const server = http.createServer(app)
72 const wss = new WebSocketServer({ noServer: true })
74 wss.on('connection', function (ws, req) {
75 ws['ip'] = proxyAddr(req, CONFIG.TRUST_PROXY)
77 trackerServer.onWebSocketConnection(ws)
80 server.on('upgrade', (request, socket, head) => {
81 const pathname = parse(request.url).pathname
83 if (pathname === '/tracker/socket') {
84 wss.handleUpgrade(request, socket, head, ws => wss.emit('connection', ws, request))
87 // Don't destroy socket, we have Socket.IO too
93 // ---------------------------------------------------------------------------
97 createWebsocketTrackerServer
100 // ---------------------------------------------------------------------------
102 function runPeersChecker () {
104 logger.debug('Checking peers.')
106 for (const ip of Object.keys(peersIpInfoHash)) {
107 if (peersIps[ip] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP) {
108 logger.warn('Peer %s made abnormal requests (%d).', ip, peersIps[ip])
114 }, TRACKER_RATE_LIMITS.INTERVAL)