package metainfo
import (
- "fmt"
"io"
+ "net/url"
"os"
"time"
)
type MetaInfo struct {
- InfoBytes bencode.Bytes `bencode:"info"`
- Announce string `bencode:"announce,omitempty"`
- AnnounceList [][]string `bencode:"announce-list,omitempty"`
- Nodes []Node `bencode:"nodes,omitempty"`
- CreationDate int64 `bencode:"creation date,omitempty"`
- Comment string `bencode:"comment,omitempty"`
- CreatedBy string `bencode:"created by,omitempty"`
- Encoding string `bencode:"encoding,omitempty"`
- URLList interface{} `bencode:"url-list,omitempty"`
-}
-
-// Information specific to a single file inside the MetaInfo structure.
-type FileInfo struct {
- Length int64 `bencode:"length"`
- Path []string `bencode:"path"`
+ InfoBytes bencode.Bytes `bencode:"info,omitempty"` // BEP 3
+ Announce string `bencode:"announce,omitempty"` // BEP 3
+ AnnounceList AnnounceList `bencode:"announce-list,omitempty"` // BEP 12
+ Nodes []Node `bencode:"nodes,omitempty"` // BEP 5
+ // Where's this specified? Mentioned at
+ // https://wiki.theory.org/index.php/BitTorrentSpecification: (optional) the creation time of
+ // the torrent, in standard UNIX epoch format (integer, seconds since 1-Jan-1970 00:00:00 UTC)
+ CreationDate int64 `bencode:"creation date,omitempty,ignore_unmarshal_type_error"`
+ Comment string `bencode:"comment,omitempty"`
+ CreatedBy string `bencode:"created by,omitempty"`
+ Encoding string `bencode:"encoding,omitempty"`
+ UrlList UrlList `bencode:"url-list,omitempty"` // BEP 19 WebSeeds
}
// Load a MetaInfo from an io.Reader. Returns a non-nil error in case of
return Load(f)
}
-func (mi MetaInfo) UnmarshalInfo() (info Info) {
- err := bencode.Unmarshal(mi.InfoBytes, &info)
- if err != nil {
- panic(fmt.Sprintf("bad info bytes: %s", err))
- }
+func (mi MetaInfo) UnmarshalInfo() (info Info, err error) {
+ err = bencode.Unmarshal(mi.InfoBytes, &info)
return
}
// Set good default values in preparation for creating a new MetaInfo file.
func (mi *MetaInfo) SetDefaults() {
- mi.Comment = "yoloham"
mi.CreatedBy = "github.com/anacrolix/torrent"
mi.CreationDate = time.Now().Unix()
- // mi.Info.PieceLength = 256 * 1024
}
-// Creates a Magnet from a MetaInfo.
-func (mi *MetaInfo) Magnet(displayName string, infoHash Hash) (m Magnet) {
- for _, tier := range mi.AnnounceList {
- for _, tracker := range tier {
- m.Trackers = append(m.Trackers, tracker)
- }
+// Creates a Magnet from a MetaInfo. Optional infohash and parsed info can be provided.
+func (mi MetaInfo) Magnet(infoHash *Hash, info *Info) (m Magnet) {
+ m.Trackers = append(m.Trackers, mi.UpvertedAnnounceList().DistinctValues()...)
+ if info != nil {
+ m.DisplayName = info.BestName()
}
- if m.Trackers == nil && mi.Announce != "" {
- m.Trackers = []string{mi.Announce}
+ if infoHash != nil {
+ m.InfoHash = *infoHash
+ } else {
+ m.InfoHash = mi.HashInfoBytes()
}
- m.DisplayName = displayName
- m.InfoHash = infoHash
+ m.Params = make(url.Values)
+ m.Params["ws"] = mi.UrlList
return
}
+
+// Returns the announce list converted from the old single announce field if
+// necessary.
+func (mi *MetaInfo) UpvertedAnnounceList() AnnounceList {
+ if mi.AnnounceList.OverridesAnnounce(mi.Announce) {
+ return mi.AnnounceList
+ }
+ if mi.Announce != "" {
+ return [][]string{{mi.Announce}}
+ }
+ return nil
+}