8 "github.com/anacrolix/torrent/common"
9 "github.com/anacrolix/torrent/metainfo"
10 pp "github.com/anacrolix/torrent/peer_protocol"
11 "github.com/anacrolix/torrent/segments"
12 "github.com/anacrolix/torrent/webseed"
13 "github.com/pkg/errors"
16 type webseedPeer struct {
18 activeRequests map[Request]webseed.Request
19 requesterCond sync.Cond
23 var _ peerImpl = (*webseedPeer)(nil)
25 func (me *webseedPeer) connStatusString() string {
29 func (ws *webseedPeer) String() string {
30 return fmt.Sprintf("webseed peer for %q", ws.client.Url)
33 func (ws *webseedPeer) onGotInfo(info *metainfo.Info) {
34 ws.client.FileIndex = segments.NewIndex(common.LengthIterFromUpvertedFiles(info.UpvertedFiles()))
38 func (ws *webseedPeer) _postCancel(r Request) {
42 func (ws *webseedPeer) writeInterested(interested bool) bool {
46 func (ws *webseedPeer) cancel(r Request) bool {
47 active, ok := ws.activeRequests[r]
55 func (ws *webseedPeer) intoSpec(r Request) webseed.RequestSpec {
56 return webseed.RequestSpec{ws.peer.t.requestOffset(r), int64(r.Length)}
59 func (ws *webseedPeer) request(r Request) bool {
60 ws.requesterCond.Signal()
64 func (ws *webseedPeer) doRequest(r Request) {
65 webseedRequest := ws.client.NewRequest(ws.intoSpec(r))
66 ws.activeRequests[r] = webseedRequest
67 ws.requesterCond.L.Unlock()
68 ws.requestResultHandler(r, webseedRequest)
69 ws.requesterCond.L.Lock()
70 delete(ws.activeRequests, r)
73 func (ws *webseedPeer) requester() {
74 ws.requesterCond.L.Lock()
75 defer ws.requesterCond.L.Unlock()
77 for !ws.peer.closed.IsSet() {
78 for r := range ws.peer.requests {
79 if _, ok := ws.activeRequests[r]; ok {
85 ws.requesterCond.Wait()
89 func (ws *webseedPeer) connectionFlags() string {
93 // TODO: This is called when banning peers. Perhaps we want to be able to ban webseeds too. We could
94 // return bool if this is even possible, and if it isn't, skip to the next drop candidate.
95 func (ws *webseedPeer) drop() {}
97 func (ws *webseedPeer) updateRequests() {
98 ws.peer.doRequestState()
101 func (ws *webseedPeer) onClose() {
102 ws.requesterCond.Broadcast()
105 func (ws *webseedPeer) requestResultHandler(r Request, webseedRequest webseed.Request) {
106 result := <-webseedRequest.Result
108 defer ws.peer.t.cl.unlock()
109 if result.Err != nil {
110 ws.peer.logger.Printf("Request %v rejected: %v", r, result.Err)
111 // Always close for now. We need to filter out temporary errors, but this is a nightmare in
112 // Go. Currently a bad webseed URL can starve out the good ones due to the chunk selection
114 const closeOnAllErrors = false
115 if closeOnAllErrors || strings.Contains(errors.Cause(result.Err).Error(), "unsupported protocol scheme") {
118 ws.peer.remoteRejectedRequest(r)
121 err := ws.peer.receiveChunk(&pp.Message{