/// <summary>
/// 返回未能成功下载的块标记
/// </summary>
List <int> DownloadData(byte[] hash, int[] indexs, IPAddress iP)
{
var failStat = $"target: {iP} don't have this block";
List <P2PMessage> result;
StringBuilder @string = new StringBuilder();
foreach (var i in indexs)
{
@string.Append($"{i} ");
}
_logger.Info($"Now Download {@string} from {iP}");
using (var transMan = new DownloadTransManager(iP))
{
transMan.GetData(hash, indexs);
result = transMan.GetReply(indexs.Length);
if (result.Count == 0)
{
transMan.SendCloseMessage();
// 如果进入了这里，说明请求的IP里，请求的块一个也没有
return(new List <int>(indexs));
}
HashSet <int> set = new System.Collections.Generic.HashSet <int>(indexs);
foreach (var i in result)
{
_logger.Info($"Get {i.type} from {iP}");
if (i.type == P2PMessageType.DATA)
{
var data = (DataMessage)i;
var index = data.p2PDatas.block.index;
if (set.Contains(index))
{
transMan.SendOkMessage(hash, data.p2PDatas.block.index);
try
{
fmanager.OnBlockDownloadSuccess(hash, index, data.p2PDatas.data);
set.Remove(index);
}
catch (FailToDownloadException)
{
}
}
}
else if (i.type == P2PMessageType.ERROR)
{
var index = ((ErrorMessage)i).Block.index;
fmanager.SetRemoteBlockPresentStat(hash, iP, index, false);
}
}
transMan.SendCloseMessage();
return(set.ToList());
}
}
void RefreshFileInfo(IPAddress lastDownLoc, byte[] hash)
{
List <P2PMessage> result;
using (var transMan = new DownloadTransManager(lastDownLoc))
{
transMan.GetFileInfo(hash);
result = transMan.GetReply(1);
transMan.SendCloseMessage();
}
foreach (var i in result)
{
if (i.type == P2PMessageType.FILE_INFO)
{
if (i.length != 0)
{
var info = (FileInfoMessage)i;
foreach (var j in info.locateInfos)
{
fmanager.AddOrRefreshFileInfo(
j.hash, new IPAddress(j.locate), j.indexs);
}
}
break;
}
}
}
