11 "github.com/anacrolix/torrent/common"
12 "github.com/anacrolix/torrent/metainfo"
13 pp "github.com/anacrolix/torrent/peer_protocol"
14 "github.com/anacrolix/torrent/segments"
15 "github.com/anacrolix/torrent/webseed"
18 type webseedPeer struct {
20 activeRequests map[Request]webseed.Request
21 requesterCond sync.Cond
25 var _ peerImpl = (*webseedPeer)(nil)
27 func (me *webseedPeer) writeBufferFull() bool {
31 func (me *webseedPeer) connStatusString() string {
35 func (ws *webseedPeer) String() string {
36 return fmt.Sprintf("webseed peer for %q", ws.client.Url)
39 func (ws *webseedPeer) onGotInfo(info *metainfo.Info) {
40 ws.client.FileIndex = segments.NewIndex(common.LengthIterFromUpvertedFiles(info.UpvertedFiles()))
44 func (ws *webseedPeer) _postCancel(r Request) {
48 func (ws *webseedPeer) writeInterested(interested bool) bool {
52 func (ws *webseedPeer) cancel(r Request) bool {
53 active, ok := ws.activeRequests[r]
61 func (ws *webseedPeer) intoSpec(r Request) webseed.RequestSpec {
62 return webseed.RequestSpec{ws.peer.t.requestOffset(r), int64(r.Length)}
65 func (ws *webseedPeer) request(r Request) bool {
66 ws.requesterCond.Signal()
70 func (ws *webseedPeer) doRequest(r Request) {
71 webseedRequest := ws.client.NewRequest(ws.intoSpec(r))
72 ws.activeRequests[r] = webseedRequest
74 ws.requesterCond.L.Unlock()
75 defer ws.requesterCond.L.Lock()
76 ws.requestResultHandler(r, webseedRequest)
78 delete(ws.activeRequests, r)
81 func (ws *webseedPeer) requester() {
82 ws.requesterCond.L.Lock()
83 defer ws.requesterCond.L.Unlock()
85 for !ws.peer.closed.IsSet() {
86 for r := range ws.peer.requests {
87 if _, ok := ws.activeRequests[r]; ok {
93 ws.requesterCond.Wait()
97 func (ws *webseedPeer) connectionFlags() string {
101 // TODO: This is called when banning peers. Perhaps we want to be able to ban webseeds too. We could
102 // return bool if this is even possible, and if it isn't, skip to the next drop candidate.
103 func (ws *webseedPeer) drop() {}
105 func (ws *webseedPeer) updateRequests() {
108 func (ws *webseedPeer) onClose() {
109 ws.peer.logger.Print("closing")
110 for _, r := range ws.activeRequests {
113 ws.requesterCond.Broadcast()
116 func (ws *webseedPeer) requestResultHandler(r Request, webseedRequest webseed.Request) {
117 result := <-webseedRequest.Result
119 defer ws.peer.t.cl.unlock()
120 if result.Err != nil {
121 if !errors.Is(result.Err, context.Canceled) {
122 ws.peer.logger.Printf("Request %v rejected: %v", r, result.Err)
124 // We need to filter out temporary errors, but this is a nightmare in Go. Currently a bad
125 // webseed URL can starve out the good ones due to the chunk selection algorithm.
126 const closeOnAllErrors = false
127 if closeOnAllErrors ||
128 strings.Contains(result.Err.Error(), "unsupported protocol scheme") ||
130 var err webseed.ErrBadResponse
131 if !errors.As(result.Err, &err) {
134 return err.Response.StatusCode == http.StatusNotFound
138 ws.peer.remoteRejectedRequest(r)
141 err := ws.peer.receiveChunk(&pp.Message{