74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
package tracker
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import (
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"errors"
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"net"
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"net/url"
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)
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// Marshalled as binary by the UDP client, so be careful making changes.
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type AnnounceRequest struct {
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InfoHash [20]byte
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PeerId [20]byte
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Downloaded int64
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Left uint64
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Uploaded int64
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// Apparently this is optional. None can be used for announces done at
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// regular intervals.
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Event AnnounceEvent
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IPAddress int32
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Key int32
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NumWant int32 // How many peer addresses are desired. -1 for default.
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Port uint16
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} // 82 bytes
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type AnnounceResponse struct {
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Interval int32 // Minimum seconds the local peer should wait before next announce.
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Leechers int32
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Seeders int32
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Peers []Peer
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}
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type AnnounceEvent int32
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func (e AnnounceEvent) String() string {
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// See BEP 3, "event".
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return []string{"empty", "completed", "started", "stopped"}[e]
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}
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type Peer struct {
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IP net.IP
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Port int
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}
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const (
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None AnnounceEvent = iota
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Completed // The local peer just completed the torrent.
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Started // The local peer has just resumed this torrent.
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Stopped // The local peer is leaving the swarm.
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)
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var (
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ErrBadScheme = errors.New("unknown scheme")
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)
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func Announce(urlStr string, req *AnnounceRequest) (res AnnounceResponse, err error) {
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return AnnounceHost(urlStr, req, "")
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}
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func AnnounceHost(urlStr string, req *AnnounceRequest, host string) (res AnnounceResponse, err error) {
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_url, err := url.Parse(urlStr)
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if err != nil {
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return
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}
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switch _url.Scheme {
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case "http", "https":
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return announceHTTP(req, _url, host)
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case "udp":
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return announceUDP(req, _url)
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default:
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err = ErrBadScheme
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return
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}
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}
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