// HTTPTrackerError reports a bencoded []byte response as specified by input string
func HTTPTrackerError(err string) []byte {
return bencode.EncDictMap(map[string][]byte{
"failure reason": bencode.EncString(err),
"interval": bencode.EncInt(RandRange(Static.Config.Interval-600, Static.Config.Interval)),
"min interval": bencode.EncInt(Static.Config.Interval / 2),
})
}
// HTTPTrackerAnnounce announces using HTTP format
func HTTPTrackerAnnounce(query map[string]string, file FileRecord, fileUser FileUserRecord) []byte {
// Begin generating response map, with current number of known seeders/leechers
res := map[string][]byte{
"complete": bencode.EncInt(file.Seeders()),
"incomplete": bencode.EncInt(file.Leechers()),
}
// If client has not yet completed torrent, ask them to announce more frequently, so they can gather
// more peers and quickly report their statistics
if fileUser.Completed == false {
res["interval"] = bencode.EncInt(RandRange(300, 600))
res["min interval"] = bencode.EncInt(300)
} else {
// Once a torrent has been completed, report statistics less frequently
res["interval"] = bencode.EncInt(RandRange(Static.Config.Interval-600, Static.Config.Interval))
res["min interval"] = bencode.EncInt(Static.Config.Interval / 2)
}
// Check for numwant parameter, return up to that number of peers
// Default is 50 per protocol
numwant := 50
if _, ok := query["numwant"]; ok {
// Verify numwant is an integer
num, err := strconv.Atoi(query["numwant"])
if err == nil {
numwant = num
}
}
// Generaate compact peer list of length numwant, exclude this user
res["peers"] = bencode.EncBytes(file.PeerList(query["ip"], numwant))
// Bencode entire map and return
return bencode.EncDictMap(res)
}
// HTTPTrackerScrape reports scrape using HTTP format
func HTTPTrackerScrape(query map[string]string, file FileRecord) []byte {
// Decode hex string to byte format
hash, err := hex.DecodeString(file.InfoHash)
if err != nil {
hash = []byte("")
}
return bencode.EncDictMap(map[string][]byte{
"files": bencode.EncBytes(hash),
"complete": bencode.EncInt(file.Seeders()),
"downloaded": bencode.EncInt(file.Completed()),
"incomplete": bencode.EncInt(file.Leechers()),
// optional field: name, string
})
}