7 "github.com/anacrolix/missinggo/pubsub"
9 "github.com/anacrolix/torrent/metainfo"
12 // The Torrent's infohash. This is fixed and cannot change. It uniquely identifies a torrent.
13 func (t *Torrent) InfoHash() metainfo.Hash {
17 // Returns a channel that is closed when the info (.Info()) for the torrent has become available.
18 func (t *Torrent) GotInfo() <-chan struct{} {
19 // TODO: We shouldn't need to lock to take a channel here, if the event is only ever set.
22 return t.gotMetainfo.C()
25 // Returns the metainfo info dictionary, or nil if it's not yet available.
26 func (t *Torrent) Info() *metainfo.Info {
32 // Returns a Reader bound to the torrent's data. All read calls block until the data requested is
33 // actually available. Note that you probably want to ensure the Torrent Info is available first.
34 func (t *Torrent) NewReader() Reader {
38 readahead: 5 * 1024 * 1024,
45 type PieceStateRuns []PieceStateRun
47 func (me PieceStateRuns) String() string {
48 ss := make([]string, 0, len(me))
49 for _, psr := range me {
50 ss = append(ss, psr.String())
52 return strings.Join(ss, " ")
55 // Returns the state of pieces of the torrent. They are grouped into runs of same state. The sum of
56 // the state run-lengths is the number of pieces in the torrent.
57 func (t *Torrent) PieceStateRuns() PieceStateRuns {
60 return t.pieceStateRuns()
63 func (t *Torrent) PieceState(piece pieceIndex) PieceState {
66 return t.pieceState(piece)
69 // The number of pieces in the torrent. This requires that the info has been
71 func (t *Torrent) NumPieces() pieceIndex {
75 // Get missing bytes count for specific piece.
76 func (t *Torrent) PieceBytesMissing(piece int) int64 {
80 return int64(t.pieces[piece].bytesLeft())
83 // Drop the torrent from the client, and close it. It's always safe to do
84 // this. No data corruption can, or should occur to either the torrent's data,
85 // or connected peers.
86 func (t *Torrent) Drop() {
89 t.cl.dropTorrent(t.infoHash)
92 // Number of bytes of the entire torrent we have completed. This is the sum of
93 // completed pieces, and dirtied chunks of incomplete pieces. Do not use this
94 // for download rate, as it can go down when pieces are lost or fail checks.
95 // Sample Torrent.Stats.DataBytesRead for actual file data download rate.
96 func (t *Torrent) BytesCompleted() int64 {
99 return t.bytesCompleted()
102 // The subscription emits as (int) the index of pieces as their state changes.
103 // A state change is when the PieceState for a piece alters in value.
104 func (t *Torrent) SubscribePieceStateChanges() *pubsub.Subscription {
105 return t.pieceStateChanges.Subscribe()
108 // Returns true if the torrent is currently being seeded. This occurs when the
109 // client is willing to upload without wanting anything in return.
110 func (t *Torrent) Seeding() bool {
116 // Clobbers the torrent display name. The display name is used as the torrent
117 // name if the metainfo is not available.
118 func (t *Torrent) SetDisplayName(dn string) {
120 defer t.nameMu.Unlock()
127 // The current working name for the torrent. Either the name in the info dict,
128 // or a display name given such as by the dn value in a magnet link, or "".
129 func (t *Torrent) Name() string {
133 // The completed length of all the torrent data, in all its files. This is
134 // derived from the torrent info, when it is available.
135 func (t *Torrent) Length() int64 {
139 // Returns a run-time generated metainfo for the torrent that includes the
140 // info bytes and announce-list as currently known to the client.
141 func (t *Torrent) Metainfo() metainfo.MetaInfo {
144 return t.newMetaInfo()
147 func (t *Torrent) addReader(r *reader) {
150 if t.readers == nil {
151 t.readers = make(map[*reader]struct{})
153 t.readers[r] = struct{}{}
157 func (t *Torrent) deleteReader(r *reader) {
162 // Raise the priorities of pieces in the range [begin, end) to at least Normal
163 // priority. Piece indexes are not the same as bytes. Requires that the info
164 // has been obtained, see Torrent.Info and Torrent.GotInfo.
165 func (t *Torrent) DownloadPieces(begin, end pieceIndex) {
168 t.downloadPiecesLocked(begin, end)
171 func (t *Torrent) downloadPiecesLocked(begin, end pieceIndex) {
172 for i := begin; i < end; i++ {
173 if t.pieces[i].priority.Raise(PiecePriorityNormal) {
174 t.updatePiecePriority(i)
179 func (t *Torrent) CancelPieces(begin, end pieceIndex) {
182 t.cancelPiecesLocked(begin, end)
185 func (t *Torrent) cancelPiecesLocked(begin, end pieceIndex) {
186 for i := begin; i < end; i++ {
188 if p.priority == PiecePriorityNone {
191 p.priority = PiecePriorityNone
192 t.updatePiecePriority(i)
196 func (t *Torrent) initFiles() {
198 t.files = new([]*File)
199 for _, fi := range t.info.UpvertedFiles() {
201 if len(fi.PathUTF8) != 0 {
206 *t.files = append(*t.files, &File{
208 strings.Join(append([]string{t.info.Name}, path...), "/"),
219 // Returns handles to the files in the torrent. This requires that the Info is
221 func (t *Torrent) Files() []*File {
225 func (t *Torrent) AddPeers(pp []PeerInfo) int {
229 return t.addPeers(pp)
232 // Marks the entire torrent for download. Requires the info first, see
233 // GotInfo. Sets piece priorities for historical reasons.
234 func (t *Torrent) DownloadAll() {
235 t.DownloadPieces(0, t.numPieces())
238 func (t *Torrent) String() string {
241 return t.infoHash.HexString()
243 return strconv.Quote(s)
247 func (t *Torrent) AddTrackers(announceList [][]string) {
250 t.addTrackers(announceList)
253 func (t *Torrent) Piece(i pieceIndex) *Piece {
257 func (t *Torrent) PeerConns() []*PeerConn {
260 ret := make([]*PeerConn, 0, len(t.conns))
261 for c := range t.conns {