private async Task GetAndParseReannounceResponseAsync(string message, int numWant)
{
var trackerResponse = new TrackerResponse();
await trackerResponse.GetTrackerResponse(this, ownerForm.myPeerID, 25000,
message, numWant).ConfigureAwait(false);
var parser = new BencodeParser();
foreach (var item in trackerResponse.response)
{
switch (item.Key.ToString())
{
case "interval":
trackerInterval = parser.Parse <BNumber>(item.Value.EncodeAsBytes()).Value;
if (trackerInterval >= 600)
{
trackerTimer.Change(trackerInterval * 1000, trackerInterval * 1000);
}
else
{
// if for some reason we didn't get the interval,
// or if it's too small, set it to 40 minutes
trackerTimer.Change(40 * 60 * 1000, 40 * 60 * 1000);
}
break;
case "min interval":
trackerMinInterval = parser.Parse <BNumber>(item.Value.EncodeAsBytes()).Value;
break;
case "tracker id":
trackerID = parser.Parse <BString>(item.Value.EncodeAsBytes()).ToString();
break;
}
}
}
private async Task GetAndParseTrackerResponseAsync(bool isReannounce)
{
var trackerResponse = new TrackerResponse();
string trackerEvent = null;
if (!isReannounce)
{
trackerEvent = "started";
}
await trackerResponse.GetTrackerResponse(this, ownerForm.myPeerID,
25000, trackerEvent, 50).ConfigureAwait(false);
var parser = new BencodeParser();
int complete = 0, incomplete = 0;
foreach (var item in trackerResponse.response)
{
switch (item.Key.ToString())
{
case "failure reason":
// something went wrong
if (!isReannounce)
{
ownerForm.ShowError(MainForm.TRACKERERRORMSG + item.Value.ToString());
}
return;
case "interval":
trackerInterval = parser.Parse <BNumber>(item.Value.EncodeAsBytes()).Value;
break;
case "min interval":
trackerMinInterval = parser.Parse <BNumber>(item.Value.EncodeAsBytes()).Value;
break;
case "tracker id":
trackerID = parser.Parse <BString>(item.Value.EncodeAsBytes()).ToString();
break;
case "complete":
complete = (int)parser.Parse <BNumber>(item.Value.EncodeAsBytes()).Value;
// number of seeders (peers with completed file). Only for UI purposes I guess...
break;
case "incomplete":
incomplete = (int)parser.Parse <BNumber>(item.Value.EncodeAsBytes()).Value;
// number of leechers; purpose is the same
break;
case "peers":
peersAddr.Clear();
var peers = parser.Parse(item.Value.EncodeAsBytes());
if (peers is BString)
{
byte[] binaryPeersList;
binaryPeersList = ((BString)peers).Value.ToArray();
if (binaryPeersList.Length % 6 != 0)
{
// not actually an invalid bencoding, but for simplicity
throw new InvalidBencodeException <BObject>();
}
else
{
byte[] oneEntry = new byte[6];
for (int i = 0; i < binaryPeersList.Length; i += 6)
{
Array.Copy(binaryPeersList, i, oneEntry, 0, 6);
peersAddr.AddLast(GetPeerFromBytes(oneEntry));
}
}
}
else if (peers is BList)
{
foreach (var peerEntry in (BList)peers)
{
if (peerEntry is BDictionary)
{
string IP = parser.Parse <BString>(((BDictionary)peerEntry)["ip"].EncodeAsBytes()).ToString();
long port = parser.Parse <BNumber>(((BDictionary)peerEntry)["port"].EncodeAsBytes()).Value;
peersAddr.AddLast(new IPEndPoint(IPAddress.Parse(IP), (int)port));
}
}
}
else
{
// not actually an invalid bencoding, but for simplicity
throw new InvalidBencodeException <BObject>();
}
break;
}
}
ownerForm.UpdateSeedersLeechersNum(this, complete, incomplete);
}