/// <summary>
/// Announces Peer to DHT with AnnounceParameters infomation.
/// </summary>
/// <returns>True if successful</returns>
public void AnnouncePeer(byte[] infoHash, AnnounceParameters pars)
{
PeerEntry entry = new PeerEntry(pars);
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Peer to be announced to DHT:\n{0}", entry.ToString()));
AnnouncePeer(infoHash, entry);
}
/// <summary>
/// Announces Peer to DHT with AnnounceParameters infomation.
/// </summary>
/// <returns>True if successful</returns>
public void AnnouncePeer(byte[] infoHash, AnnounceParameters pars)
{
PeerEntry entry = new PeerEntry(pars);
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Peer to be announced to DHT:\n{0}", entry.ToString()));
AnnouncePeer(infoHash, entry);
}
/// <summary>
/// Gets peers from DHT.
/// </summary>
/// <param name="infoHash">The infoHash of the torrent, used as the name in Dht</param>
/// <returns>
/// A List of PeerEntries which could have duplicated peers with different
/// states. Empty List if no peers for this infoHash or the network communication
/// is temporarily down.
/// </returns>
public IEnumerable <PeerEntry> GetPeers(byte[] infoHash)
{
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Getting peers for infoHash: {0}",
ServiceUtil.GetUrlCompatibleString(infoHash)));
ICollection <PeerEntry> peers = new List <PeerEntry>();
// Fire DHT Get
DictionaryServiceData results;
try {
byte[] key = ServiceUtil.GetUrlCompatibleBytes(infoHash);
results = _dictSvc.Get(key);
} catch (DictionaryServiceException ex) {
Logger.WriteLineIf(LogLevel.Error, _log_props, string.Format(
"Exception caught when retrieving peers. Returning empty peers collection.\n{0}",
ex));
// No big deal. We simply wait until the next time to query again.
// Return empty collection.
return(peers);
}
Logger.WriteLineIf(LogLevel.Info, _log_props,
string.Format("{0} peer(s) retrieved from DHT", results.DataEntries.Length));
int index = 0;
foreach (var r in results.DataEntries)
{
try {
PeerEntry entry = (PeerEntry)DictionaryData.CreateDictionaryData(r.Value);
Logger.WriteLineIf(LogLevel.Verbose, _log_props,
string.Format("Peer entry #{0} built:\n{1}", index++, entry.ToString()));
peers.Add(entry);
} catch (Exception ex) {
Logger.WriteLineIf(LogLevel.Error, _log_props, string.Format(
"Error occurred when deserializing result from DHT. Continue to parse next.\n{0}",
ex));
// Ignore this entry and continue to parse others.
continue;
}
}
return(peers);
}
