/// <summary>
/// Generates the AnnounceParameters from PeerEntry
/// </summary>
private AnnounceParameters GenerateAnnounceParameters(byte[] infoHash, PeerEntry entry)
{
NameValueCollection c = new NameValueCollection();
// "info_hash", "peer_id", "port", "uploaded(bytes)", "downloaded", "left", "compact"
// InfoHash here should be just like what's in HttpRequests
c.Add("info_hash", System.Web.HttpUtility.UrlEncode(infoHash));
c.Add("peer_id", entry.PeerID);
c.Add("port", entry.PeerPort.ToString());
// Fake the mandatory fields, these are solely used to compute the upload/download speed
c.Add("uploaded", "0");
c.Add("downloaded", "0");
c.Add("left", "1000");
c.Add("compact", "1");
// Optional but needs to set for monotorrent tracker
if (entry.PeerState != MonoTorrent.Common.TorrentEvent.None)
{
c.Add("event", entry.PeerEventAsRequestKey);
}
// NOTE: "ip" is optional and we don't supply it.
// AnnounceParameters will set entry.PeerIP as its ClientAddress.
AnnounceParameters par = new AnnounceParameters(c, IPAddress.Parse(entry.PeerIP));
return(par);
}
/// <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>
/// Annouces Peer to DHT.
/// </summary>
public void AnnouncePeer(byte[] infoHash, PeerEntry peer)
{
// Firing DHT Put
byte[] peer_bytes = peer.SerializeTo();
byte[] dictKey = ServiceUtil.GetUrlCompatibleBytes(infoHash);
try {
_dictSvc.Put(dictKey, peer_bytes);
} catch (Exception ex) {
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Unable to announce peer to DHT. We can try next time. \n{0}", ex));
return;
}
Logger.WriteLineIf(LogLevel.Info, _log_props,
string.Format("Successfully announced peer to DHT"));
}
/// <summary>
/// Annouces Peer to DHT.
/// </summary>
public void AnnouncePeer(byte[] infoHash, PeerEntry peer)
{
// Firing DHT Put
byte[] peer_bytes = peer.SerializeTo();
byte[] dictKey = ServiceUtil.GetUrlCompatibleBytes(infoHash);
try {
_dictSvc.Put(dictKey, peer_bytes);
} catch (Exception ex) {
Logger.WriteLineIf(LogLevel.Error, _log_props,
string.Format("Unable to announce peer to DHT. We can try next time. \n{0}", ex));
return;
}
Logger.WriteLineIf(LogLevel.Info, _log_props,
string.Format("Successfully announced peer to DHT"));
}
/// <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);
}
/// <summary>
/// Generates the AnnounceParameters from PeerEntry
/// </summary>
private AnnounceParameters GenerateAnnounceParameters(byte[] infoHash, PeerEntry entry)
{
NameValueCollection c = new NameValueCollection();
// "info_hash", "peer_id", "port", "uploaded(bytes)", "downloaded", "left", "compact"
// InfoHash here should be just like what's in HttpRequests
c.Add("info_hash", System.Web.HttpUtility.UrlEncode(infoHash));
c.Add("peer_id", entry.PeerID);
c.Add("port", entry.PeerPort.ToString());
// Fake the mandatory fields, these are solely used to compute the upload/download speed
c.Add("uploaded", "0");
c.Add("downloaded", "0");
c.Add("left", "1000");
c.Add("compact", "1");
// Optional but needs to set for monotorrent tracker
if (entry.PeerState != MonoTorrent.Common.TorrentEvent.None) {
c.Add("event", entry.PeerEventAsRequestKey);
}
// NOTE: "ip" is optional and we don't supply it.
// AnnounceParameters will set entry.PeerIP as its ClientAddress.
AnnounceParameters par = new AnnounceParameters(c, IPAddress.Parse(entry.PeerIP));
return par;
}
