// handleEvent checks to see whether an announce has an event and if it does,
// properly handles that event.
func (tkr *Tracker) handleEvent(ann *models.Announce) (snatched bool, err error) {
var snatchedv4, snatchedv6 bool
if ann.HasIPv4() {
snatchedv4, err = tkr.handlePeerEvent(ann, ann.PeerV4)
if err != nil {
return
}
}
if ann.HasIPv6() {
snatchedv6, err = tkr.handlePeerEvent(ann, ann.PeerV6)
if err != nil {
return
}
}
if snatchedv4 || snatchedv6 {
err = tkr.IncrementTorrentSnatches(ann.Torrent.Infohash)
if err != nil {
return
}
ann.Torrent.Snatches++
return true, nil
}
return false, nil
}
// HandleAnnounce encapsulates all of the logic of handling a BitTorrent
// client's Announce without being coupled to any transport protocol.
func (tkr *Tracker) HandleAnnounce(ann *models.Announce, w Writer) (err error) {
if tkr.Config.ClientWhitelistEnabled {
if err = tkr.ClientApproved(ann.ClientID()); err != nil {
return err
}
}
if tkr.Config.JWKSetURI != "" {
err := tkr.validateJWT(ann.JWT, ann.Infohash)
if err != nil {
return err
}
}
torrent, err := tkr.FindTorrent(ann.Infohash)
if err == models.ErrTorrentDNE && tkr.Config.CreateOnAnnounce {
torrent = &models.Torrent{
Infohash: ann.Infohash,
Seeders: models.NewPeerMap(true, tkr.Config),
Leechers: models.NewPeerMap(false, tkr.Config),
}
tkr.PutTorrent(torrent)
stats.RecordEvent(stats.NewTorrent)
} else if err != nil {
return err
}
ann.BuildPeer(torrent)
_, err = tkr.updateSwarm(ann)
if err != nil {
return err
}
_, err = tkr.handleEvent(ann)
if err != nil {
return err
}
if tkr.Config.PurgeInactiveTorrents && torrent.PeerCount() == 0 {
// Rather than deleting the torrent explicitly, let the tracker driver
// ensure there are no race conditions.
tkr.PurgeInactiveTorrent(torrent.Infohash)
stats.RecordEvent(stats.DeletedTorrent)
}
stats.RecordEvent(stats.Announce)
return w.WriteAnnounce(newAnnounceResponse(ann))
}
// updateSwarm handles the changes to a torrent's swarm given an announce.
func (tkr *Tracker) updateSwarm(ann *models.Announce) (created bool, err error) {
var createdv4, createdv6 bool
tkr.TouchTorrent(ann.Torrent.Infohash)
if ann.HasIPv4() {
createdv4, err = tkr.updatePeer(ann, ann.PeerV4)
if err != nil {
return
}
}
if ann.HasIPv6() {
createdv6, err = tkr.updatePeer(ann, ann.PeerV6)
if err != nil {
return
}
}
return createdv4 || createdv6, nil
}
// HandleAnnounce encapsulates all of the logic of handling a BitTorrent
// client's Announce without being coupled to any transport protocol.
func (tkr *Tracker) HandleAnnounce(ann *models.Announce, w Writer) (err error) {
if tkr.Config.ClientWhitelistEnabled {
if err = tkr.ClientApproved(ann.ClientID()); err != nil {
return err
}
}
var user *models.User
if tkr.Config.PrivateEnabled {
if user, err = tkr.FindUser(ann.Passkey); err != nil {
return err
}
}
torrent, err := tkr.FindTorrent(ann.Infohash)
if err == models.ErrTorrentDNE && tkr.Config.CreateOnAnnounce {
torrent = &models.Torrent{
Infohash: ann.Infohash,
Seeders: models.NewPeerMap(true, tkr.Config),
Leechers: models.NewPeerMap(false, tkr.Config),
}
tkr.PutTorrent(torrent)
stats.RecordEvent(stats.NewTorrent)
} else if err != nil {
return err
}
ann.BuildPeer(user, torrent)
var delta *models.AnnounceDelta
if tkr.Config.PrivateEnabled {
delta = newAnnounceDelta(ann, torrent)
}
created, err := tkr.updateSwarm(ann)
if err != nil {
return err
}
snatched, err := tkr.handleEvent(ann)
if err != nil {
return err
}
if tkr.Config.PrivateEnabled {
delta.Created = created
delta.Snatched = snatched
if err = tkr.Backend.RecordAnnounce(delta); err != nil {
return err
}
} else if tkr.Config.PurgeInactiveTorrents && torrent.PeerCount() == 0 {
// Rather than deleting the torrent explicitly, let the tracker driver
// ensure there are no race conditions.
tkr.PurgeInactiveTorrent(torrent.Infohash)
stats.RecordEvent(stats.DeletedTorrent)
}
stats.RecordEvent(stats.Announce)
return w.WriteAnnounce(newAnnounceResponse(ann))
}
