public TrackerResponse AnnounceStart(byte[] infoHash, string peerId, ushort port, long downloaded, long uploaded,
long left)
{
var request = new TrackerRequest(infoHash, peerId, port, uploaded, downloaded, left, true, true,
EventType.Started, 100);
return GetResponse(request);
}
/// <summary>
/// Sends a HTTP request to the tracker and returns the response.
/// </summary>
/// <param name="requestData">The data for the request that will be sent to the tracker.</param>
/// <returns>The tracker's response.</returns>
public TrackerResponse GetResponse(TrackerRequest requestData)
{
Contract.Requires(requestData != null);
TrackerResponse response = null;
if (PreferredAnnounce != null)
{
response = AttemptGet(requestData, PreferredAnnounce);
}
if (response == null)
{
foreach (string url in Announces)
{
if ((response = AttemptGet(requestData, url)) != null)
{
PreferredAnnounce = url;
break;
}
}
}
return(response);
}
private void Announce(InfoHash hash, long downloaded, long uploaded, long remaining, EventType type)
{
var request = new TrackerRequest(hash, Global.Instance.PeerId, Global.Instance.ListeningPort,
uploaded, downloaded, remaining, true, false, type);
SendRequest(request);
}
public TrackerResponse AnnounceStart(byte[] infoHash, string peerId, ushort port, long downloaded, long uploaded,
long left)
{
var request = new TrackerRequest(infoHash, peerId, port, uploaded, downloaded, left, true, true,
EventType.Started, 100);
return(GetResponse(request));
}
/// <summary>
/// Sends a HTTP request to the tracker and returns the response.
/// </summary>
/// <param name="requestData">The data for the request that will be sent to the tracker.</param>
/// <returns>The tracker's response.</returns>
public TrackerResponse GetResponse(TrackerRequest requestData)
{
Contract.Requires(requestData != null);
TrackerResponse response = null;
if (PreferredAnnounce != null)
response = AttemptGet(requestData, PreferredAnnounce);
if (response == null)
{
foreach (string url in Announces)
{
if ((response = AttemptGet(requestData, url)) != null)
{
PreferredAnnounce = url;
break;
}
}
}
return response;
}
private void SendRequest(TrackerRequest request)
{
var response = _client.GetResponse(request);
LastAnnounced = DateTime.Now;
if (response == null || response.FailureReason != null)
{
if (request.Event == EventType.Started)
{
LastState = AnnounceState.StartFailure;
}
else
{
LastState = AnnounceState.Failure;
}
Period = TimeSpan.FromSeconds(20);
}
else
{
LastState = AnnounceState.Success;
Period = TimeSpan.FromSeconds(response.Interval);
OnPeersReceived(response.Endpoints);
}
}
private TrackerResponse AttemptGet(TrackerRequest requestData, string announceURL)
{
var parameters = new Dictionary <string, string>
{
{ "info_hash", UrlEncode(requestData.InfoHash) },
{ "peer_id", Uri.EscapeDataString(requestData.PeerId) },
{ "port", requestData.Port.ToString() },
{ "uploaded", requestData.Uploaded.ToString() },
{ "downloaded", requestData.Downloaded.ToString() },
{ "left", requestData.Left.ToString() },
{ "compact", requestData.Compact ? "1" : "0" },
{ "no_peer_id", requestData.OmitPeerIds ? "1" : "0" }
};
if (requestData.Event != EventType.None)
{
parameters.Add("event", requestData.Event.ToString().ToLower());
}
if (requestData.NumWant.HasValue)
{
parameters.Add("numwant", requestData.NumWant.ToString());
}
var urlBuilder = new StringBuilder();
urlBuilder.Append(parameters.Select(kv =>
{
if (kv.Value == null)
{
return(string.Empty);
}
return(kv.Key + "=" + kv.Value);
}).ToDelimitedString("&"));
if (!announceURL.Contains("?"))
{
announceURL += "?";
}
else
{
announceURL += "&";
}
var request = (HttpWebRequest)WebRequest.Create(announceURL + urlBuilder);
request.KeepAlive = false;
request.Method = "GET";
try
{
WebResponse response = request.GetResponse();
byte[] trackerResponse;
using (var reader = new BinaryReader(response.GetResponseStream()))
{
using (var ms = new MemoryStream())
{
var buffer = new byte[1024];
int len = 0;
while ((len = reader.Read(buffer, 0, buffer.Length)) != 0)
{
ms.Write(buffer, 0, len);
}
trackerResponse = ms.ToArray();
}
}
response.Close();
return(new TrackerResponse(trackerResponse));
}
catch (Exception e)
{
return(null);
}
}
private TrackerResponse AttemptGet(TrackerRequest requestData, string announceURL)
{
var parameters = new Dictionary<string, string>
{
{"info_hash", UrlEncode(requestData.InfoHash)},
{"peer_id", Uri.EscapeDataString(requestData.PeerId)},
{"port", requestData.Port.ToString()},
{"uploaded", requestData.Uploaded.ToString()},
{"downloaded", requestData.Downloaded.ToString()},
{"left", requestData.Left.ToString()},
{"compact", requestData.Compact ? "1" : "0"},
{"no_peer_id", requestData.OmitPeerIds ? "1" : "0"}
};
if (requestData.Event != EventType.None)
parameters.Add("event", requestData.Event.ToString().ToLower());
if (requestData.NumWant.HasValue)
parameters.Add("numwant", requestData.NumWant.ToString());
var urlBuilder = new StringBuilder();
urlBuilder.Append(parameters.Select(kv =>
{
if (kv.Value == null)
return string.Empty;
return kv.Key + "=" + kv.Value;
}).ToDelimitedString("&"));
if (!announceURL.Contains("?")) announceURL += "?";
else announceURL += "&";
var request = (HttpWebRequest) WebRequest.Create(announceURL + urlBuilder);
request.KeepAlive = false;
request.Method = "GET";
try
{
WebResponse response = request.GetResponse();
byte[] trackerResponse;
using (var reader = new BinaryReader(response.GetResponseStream()))
{
using (var ms = new MemoryStream())
{
var buffer = new byte[1024];
int len = 0;
while ((len = reader.Read(buffer, 0, buffer.Length)) != 0)
{
ms.Write(buffer, 0, len);
}
trackerResponse = ms.ToArray();
}
}
response.Close();
return new TrackerResponse(trackerResponse);
}
catch (Exception e)
{
return null;
}
}
private void SendRequest(TrackerRequest request)
{
var response = client.GetResponse(request);
LastAnnounced = DateTime.Now;
if(response == null || response.FailureReason != null)
{
if (request.Event == EventType.Started)
LastState = AnnounceState.StartFailure;
else
LastState = AnnounceState.Failure;
Period = TimeSpan.FromSeconds(20);
}
else
{
LastState = AnnounceState.Success;
Period = TimeSpan.FromSeconds(response.Interval);
OnPeersReceived(response.Endpoints);
}
}
private void Announce(InfoHash hash, long downloaded, long uploaded, long remaining, EventType type)
{
var request = new TrackerRequest(hash, Global.Instance.PeerId, Global.Instance.ListeningPort,
uploaded, downloaded, remaining, true, false, type);
SendRequest(request);
}
