public void Dispose()
{
if (_dataWriterOperation != null)
{
_dataWriterOperation.Cancel();
}
if (_dataReaderOperation != null)
{
_dataReaderOperation.Cancel();
}
// put connectOperaion at the last one. or _dataReader.DetachStream will raise exception when dispose
if (_connectOperation != null)
{
_connectOperation.Cancel();
}
DisposeDataReader();
DisposeDataWriter();
if (_clientSocket != null)
{
_clientSocket.Dispose();
_clientSocket = null;
}
}
public virtual async Task Close()
{
if (null != loadOperation)
{
await Task.Run(() =>
{
cancellationTokenSource.Cancel();
loadOperation.Cancel();
loadOperation.Close();
}
).ConfigureAwait(false);
}
}
#pragma warning disable 1998
/// <summary>
/// Helper to read the information into a buffer.
/// </summary>
private async Task <Tuple <string, int> > ReadIntoBufferAsync(StreamSocket socket)
{
DataReaderLoadOperation loadTask = null;
string data;
try
{
var reader = new DataReader(socket.InputStream);
// Set the DataReader to only wait for available data
reader.InputStreamOptions = InputStreamOptions.Partial;
loadTask = reader.LoadAsync(0xffff);
bool succeeded = loadTask.AsTask().Wait(20000);
if (!succeeded)
{
throw new TimeoutException("Timed out long polling, re-trying.");
}
var count = loadTask.GetResults();
if (count == 0)
{
throw new Exception("No results loaded from reader.");
}
data = reader.ReadString(count);
if (data == null)
{
throw new Exception("ReadString operation failed.");
}
}
catch (TimeoutException ex)
{
Debug.WriteLine(ex.Message);
if (loadTask != null && loadTask.Status == Windows.Foundation.AsyncStatus.Started)
{
loadTask.Cancel();
}
return(null);
}
catch (Exception ex)
{
Debug.WriteLine("[Error] Signaling: Failed to read from socket. " + ex.Message);
if (loadTask != null && loadTask.Status == Windows.Foundation.AsyncStatus.Started)
{
loadTask.Cancel();
}
return(null);
}
int content_length = 0;
bool ret = false;
int i = data.IndexOf("\r\n\r\n");
if (i != -1)
{
Debug.WriteLine("Signaling: Headers received [i=" + i + " data(" + data.Length + ")" /*=" + data*/ + "]");
if (GetHeaderValue(data, false, "\r\nContent-Length: ", out content_length))
{
int total_response_size = (i + 4) + content_length;
if (data.Length >= total_response_size)
{
ret = true;
}
else
{
// We haven't received everything. Just continue to accept data.
Debug.WriteLine("[Error] Singaling: Incomplete response; expected to receive " + total_response_size + ", received" + data.Length);
}
}
else
{
Debug.WriteLine("[Error] Signaling: No content length field specified by the server.");
}
}
return(ret ? Tuple.Create(data, content_length) : null);
}