private void OnQueryFeedback(object state)
{
TcpClient client = null;
SslStream stream = null;
var readBuffer = new byte[38];
Trace.TraceInformation("[{0}] Starting feedback query", this.AgentId);
try
{
this.Connect(Settings.Apns.FeedbackHost, ref client, ref stream, 1);
}
catch (Exception ex)
{
Trace.TraceWarning("[{0}] Unable to query feedback service: {1}", this.AgentId, ex.Message);
return;
}
if (!client.Connected)
{
return;
}
while (true)
{
int count = stream.Read(readBuffer, 0, readBuffer.Length);
if (count < readBuffer.Length)
{
break;
}
uint time = (uint)FormattingExtensions.FromBytesNetworkOrder(readBuffer, 0);
string token = FormattingExtensions.ToHexString(readBuffer, 6, 32);
Trace.TraceInformation("[{0}] Feedback received: Time={1}, Token={2}", this.AgentId, time, token);
try
{
this.Store.Unregister(this.Consumer.AppId, Platform.Apns, token, time);
}
catch (Exception ex)
{
Trace.TraceWarning("[{0}] Unable to unregister device: {1}", ex.Message);
}
}
Trace.TraceInformation("[{0}] Feedback query ended", this.AgentId);
}
protected override void OnNotify(NotificationEventArgs e)
{
if (_client == null || !_client.Connected)
{
Connect(Settings.Apns.GatewayHost, ref _client, ref _stream);
_stream.BeginRead(_readBuffer, 0, _readBuffer.Length, OnRead, null);
}
var payloadJson = JsonConvert.SerializeObject(e.Payload);
var payloadLength = Encoding.UTF8.GetByteCount(payloadJson);
if (payloadLength > MaxPayloadLength)
{
throw new UndeliverableException("Payload too large.");
}
var buf = new byte[45 + payloadLength];
try
{
DeviceToken.Validate(Platform.Apns, e.DeviceToken);
}
catch (ValidationException)
{
throw new UndeliverableException("Invalid device token.");
}
FormattingExtensions.FromHexString(e.DeviceToken);
buf[0] = 1; // command (always 1)
(_curMessageId++).ToBytesNetworkOrder(buf, 1); // incrementing reference number
e.Expiry.ToBytesNetworkOrder(buf, 5); // UNIX epoch expiry
// token length and token
buf[9] = 0;
buf[10] = 32; // length (always 32)
FormattingExtensions.FromHexString(e.DeviceToken, buf, 11);
// payload length and payload
((short)payloadLength).ToBytesNetworkOrder(buf, 43);
Encoding.UTF8.GetBytes(payloadJson, 0, payloadJson.Length, buf, 45);
_stream.Write(buf);
}