protected void OnEventReceived(ServerSentEvent sse)
{
if (EventReceived != null)
{
EventReceived(this, new ServerSentEventReceivedEventArgs(sse));
}
}
public Task <IConnectionState> Run(Action <ServerSentEvent> msgReceived, CancellationToken cancelToken)
{
Task <IConnectionState> t = new Task <IConnectionState>(() =>
{
//using (mResponse)
{
//using (var stream = mResponse.GetResponseStream())
var stream = mResponse.GetResponseStream();
{
byte[] buffer = new byte[1024 * 8];
var taskRead = stream.ReadAsync(buffer, 0, buffer.Length, cancelToken);
try
{
taskRead.Wait(cancelToken);
}
catch (Exception ex)
{
Debug.WriteLine(ex, "ConnectedState.Run");
}
if (!cancelToken.IsCancellationRequested)
{
int bytesRead = taskRead.Result;
if (bytesRead > 0) // stream has not reached the end yet
{
Debug.WriteLine("ReadCallback {0} bytesRead", bytesRead);
string text = Encoding.UTF8.GetString(buffer, 0, bytesRead);
text = mRemainingText + text;
string[] lines = StringSplitter.SplitIntoLines(text, out mRemainingText);
foreach (string line in lines)
{
if (cancelToken.IsCancellationRequested)
{
break;
}
// Dispatch message if empty lne
if (string.IsNullOrEmpty(line.Trim()) && mSse != null)
{
Debug.WriteLine("Message received");
msgReceived(mSse);
mSse = null;
}
else if (line.StartsWith(":"))
{
// This a comment, just log it.
Debug.WriteLine("A comment was received: " + line);
}
else
{
string fieldName = String.Empty;
string fieldValue = String.Empty;
if (line.Contains(':'))
{
int index = line.IndexOf(':');
fieldName = line.Substring(0, index);
fieldValue = line.Substring(index + 1).TrimStart();
}
else
{
fieldName = line;
}
if (String.Compare(fieldName, "event", true) == 0)
{
mSse = mSse ?? new ServerSentEvent();
mSse.EventType = fieldValue;
}
else if (String.Compare(fieldName, "data", true) == 0)
{
mSse = mSse ?? new ServerSentEvent();
mSse.Data = fieldValue + '\n';
}
else if (String.Compare(fieldName, "id", true) == 0)
{
mSse = mSse ?? new ServerSentEvent();
mSse.LastEventId = fieldValue;
}
else if (String.Compare(fieldName, "retry", true) == 0)
{
int parsedRetry;
if (int.TryParse(fieldValue, out parsedRetry))
{
mSse = mSse ?? new ServerSentEvent();
mSse.Retry = parsedRetry;
}
}
else
{
// Ignore this, just log it
Debug.WriteLine("A unknown line was received: " + line);
}
}
}
if (!cancelToken.IsCancellationRequested)
{
return(this);
}
}
else // end of the stream reached
{
Debug.WriteLine("No bytes read. End of stream.");
}
}
//stream.Dispose()
//stream.Close();
//mResponse.Close();
//mResponse.Dispose();
return(new DisconnectedState(mResponse.ResponseUri, null, mWebRequesterFactory));
}
}
});
t.Start();
return(t);
}
