protected async Task ReceiveAsync()
{
NetworkStream netstream = client.GetStream();
int receivedNum;
try
{
receivedNum = await netstream.ReadAsync(buffer, 0, packager.Length + sizeof(int));
}
catch (SocketException se)
{
ReceivingAsyncStopEvent?.Invoke(this);
throw se;
}
if (receivedNum == 0)
{
//Lost connection
LostConnectionEvent?.Invoke(this);
ReceivingAsyncStopEvent?.Invoke(this);
receiving = false;
return;
}
if (receivedNum < packager.Length + sizeof(int))
{
ReceiveHeaderFailEvent?.Invoke(this);
ReceivingAsyncStopEvent?.Invoke(this);
receiving = false;
return;
}
byte[] tem = new byte[packager.Length + sizeof(int)];
Array.Copy(buffer, 0, tem, 0, packager.Length + sizeof(int));
if (!packager.Check(tem))
{
ReceiveHeaderFailEvent?.Invoke(this);
receiving = false;
return;
}
byte[] len = new byte[4];
Array.Copy(tem, packager.Length, len, 0, sizeof(int));
int length = ByteConverter.Byte2Int(len);
remainReceiveLength = length;
int readsize = remainReceiveLength < bufferSize ? remainReceiveLength : bufferSize;
while (remainReceiveLength > 0)
{
try
{
receivedNum = await netstream.ReadAsync(buffer, 0, readsize);
}
catch (SocketException se)
{
ReceivingAsyncStopEvent?.Invoke(this);
receiving = false;
throw se;
}
if (receivedNum == 0)
{
//Lost connection
LostConnectionEvent?.Invoke(this);
ReceivingAsyncStopEvent?.Invoke(this);
receiving = false;
return;
}
remainReceiveLength -= receivedNum;
tem = new byte[receivedNum];
Array.Copy(buffer, tem, receivedNum);
if (receivedData == null)
{
receivedData = new byte[receivedNum];
Array.Copy(tem, 0, receivedData, 0, receivedNum);
}
else
{
receivedData = receivedData.Concat(tem).ToArray();
}
readsize = remainReceiveLength < bufferSize ? remainReceiveLength : bufferSize;
}
ReceiveObjectDoneEvent?.Invoke(this, packager.UnPack(receivedData));
ReceiveDoneEvent?.Invoke(this, receivedData);
receivedData = null;
}
public void StopReceivingAsync()
{
ReceivingAsyncStopEvent?.Invoke(this);
receiving = false;
}