123 lignes
2.8 KiB
Go
123 lignes
2.8 KiB
Go
package upload
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import (
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"fmt"
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"os"
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"strconv"
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"strings"
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"time"
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"github.com/NyaaPantsu/nyaa/config"
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"github.com/NyaaPantsu/nyaa/models"
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"github.com/NyaaPantsu/nyaa/utils/format"
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"github.com/NyaaPantsu/nyaa/utils/log"
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"github.com/anacrolix/dht"
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"github.com/anacrolix/torrent"
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"github.com/anacrolix/torrent/bencode"
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)
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var queue []string
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var client *torrent.Client
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func initClient() error {
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clientConfig := torrent.Config{
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DHTConfig: dht.ServerConfig{
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StartingNodes: dht.GlobalBootstrapAddrs,
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},
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ListenAddr: ":" + strconv.Itoa(config.Get().Torrents.GenerationClientPort),
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}
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cl, err := torrent.NewClient(&clientConfig)
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if err != nil {
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log.Errorf("error creating client: %s", err)
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return err
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}
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client = cl
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return nil
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}
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// GenerateTorrent generates a torrent file in the specified directory in config.yml from a magnet URI
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func GenerateTorrent(magnet string) error {
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if client == nil {
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err := initClient()
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if err != nil {
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return err
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}
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}
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if magnet == "" || len(config.Get().Torrents.FileStorage) == 0 {
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return errConfig
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}
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if len(queue) > 0 {
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for _, m := range queue {
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if m == magnet {
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return errPending
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}
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}
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}
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queue = append(queue, magnet)
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t, err := client.AddMagnet(magnet)
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if err != nil {
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log.Errorf("error adding magnet to client: %s", err)
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return err
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}
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<-t.GotInfo()
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mi := t.Metainfo()
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t.Drop()
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file := fmt.Sprintf("%s%c%s.torrent", config.Get().Torrents.FileStorage, os.PathSeparator, t.InfoHash().String())
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f, err := os.Create(file)
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if err != nil {
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log.Errorf("error creating torrent metainfo file: %s", err)
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return err
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}
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defer f.Close()
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defaultTracker := config.Get().Torrents.Trackers.GetDefault()
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if defaultTracker != "" {
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mi.Announce = defaultTracker
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}
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err = bencode.NewEncoder(f).Encode(mi)
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if err != nil {
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log.Errorf("error writing torrent metainfo file: %s", err)
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return err
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}
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for k, m := range queue {
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if m == magnet {
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queue = append(queue[:k], queue[k+1:]...)
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}
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}
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log.Infof("New torrent file generated in: %s", file)
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return nil
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}
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// GotFile will check if a torrent file exists and if not, try to generate it
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func GotFile(torrent *models.Torrent) error {
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var trackers []string
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if torrent.Trackers == "" {
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trackers = config.Get().Torrents.Trackers.Default
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} else {
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trackers = torrent.GetTrackersArray()
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}
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// We generate a new magnet link with all trackers (ours + ones from uploader)
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magnet := format.InfoHashToMagnet(strings.TrimSpace(torrent.Hash), torrent.Name, trackers...)
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//Check if file exists and open
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_, err := os.Open(torrent.GetPath())
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if err != nil {
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err := GenerateTorrent(magnet)
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if err != errPending && err != nil {
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return err
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}
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if err == errPending {
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for {
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//Check again if file exists and open
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_, err := os.Open(torrent.GetPath())
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if err == nil {
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break
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}
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// We check every 10 seconds
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time.Sleep(10000)
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}
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}
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}
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return nil
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}
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