package torrent import ( "fmt" "net/url" "sync" "github.com/anacrolix/log" "github.com/anacrolix/torrent/tracker/http" "github.com/gorilla/websocket" "github.com/anacrolix/torrent/tracker" "github.com/anacrolix/torrent/webtorrent" "github.com/pion/datachannel" ) type websocketTrackerStatus struct { url url.URL tc *webtorrent.TrackerClient } func (me websocketTrackerStatus) statusLine() string { return fmt.Sprintf("%+v", me.tc.Stats()) } func (me websocketTrackerStatus) URL() *url.URL { return &me.url } type refCountedWebtorrentTrackerClient struct { webtorrent.TrackerClient refCount int } type websocketTrackers struct { PeerId [20]byte Logger log.Logger GetAnnounceRequest func(event tracker.AnnounceEvent, infoHash [20]byte) (tracker.AnnounceRequest, error) OnConn func(datachannel.ReadWriteCloser, webtorrent.DataChannelContext) mu sync.Mutex clients map[string]*refCountedWebtorrentTrackerClient Proxy http.ProxyFunc } func (me *websocketTrackers) Get(url string) (*webtorrent.TrackerClient, func()) { me.mu.Lock() defer me.mu.Unlock() value, ok := me.clients[url] if !ok { dialer := &websocket.Dialer{Proxy: me.Proxy, HandshakeTimeout: websocket.DefaultDialer.HandshakeTimeout} value = &refCountedWebtorrentTrackerClient{ TrackerClient: webtorrent.TrackerClient{ Dialer: dialer, Url: url, GetAnnounceRequest: me.GetAnnounceRequest, PeerId: me.PeerId, OnConn: me.OnConn, Logger: me.Logger.WithText(func(m log.Msg) string { return fmt.Sprintf("tracker client for %q: %v", url, m) }), }, } value.TrackerClient.Start(func(err error) { if err != nil { me.Logger.Printf("error running tracker client for %q: %v", url, err) } }) if me.clients == nil { me.clients = make(map[string]*refCountedWebtorrentTrackerClient) } me.clients[url] = value } value.refCount++ return &value.TrackerClient, func() { me.mu.Lock() defer me.mu.Unlock() value.refCount-- if value.refCount == 0 { value.TrackerClient.Close() delete(me.clients, url) } } }