func scanDir(dirName string) (ee map[metainfo.Hash]entity) {
d, err := os.Open(dirName)
if err != nil {
log.Print(err)
return
}
defer d.Close()
names, err := d.Readdirnames(-1)
if err != nil {
log.Print(err)
return
}
ee = make(map[metainfo.Hash]entity, len(names))
addEntity := func(e entity) {
e0, ok := ee[e.Hash]
if ok {
if e0.MagnetURI == "" || len(e.MagnetURI) < len(e0.MagnetURI) {
return
}
}
ee[e.Hash] = e
}
for _, n := range names {
fullName := filepath.Join(dirName, n)
switch filepath.Ext(n) {
case ".torrent":
ih, ok := torrentFileInfoHash(fullName)
if !ok {
break
}
e := entity{
TorrentFilePath: fullName,
}
missinggo.CopyExact(&e.Hash, ih)
addEntity(e)
case ".magnet":
uris, err := magnetFileURIs(fullName)
if err != nil {
log.Print(err)
break
}
for _, uri := range uris {
m, err := metainfo.ParseMagnetURI(uri)
if err != nil {
log.Printf("error parsing %q in file %q: %s", uri, fullName, err)
continue
}
addEntity(entity{
Hash: m.InfoHash,
MagnetURI: uri,
})
}
}
}
return
}
func TorrentSpecFromMagnetURI(uri string) (spec *TorrentSpec, err error) {
m, err := metainfo.ParseMagnetURI(uri)
if err != nil {
return
}
spec = &TorrentSpec{
Trackers: [][]string{m.Trackers},
DisplayName: m.DisplayName,
InfoHash: m.InfoHash,
}
return
}