private async void ReceiveDataLoop(DataReader chatReader)
{
try
{
uint size = await chatReader.LoadAsync(sizeof(uint));
if (size < sizeof(uint))
{
Disconnect("Remote device terminated connection - make sure only one instance of server is running on remote device");
return;
}
var type = DataHandler.RecognizeDataType(chatReader);
switch (type)
{
case DataHandlerTypes.ByteArray:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadByteArrayAsync(chatReader), typeof(byte[]))); break;
case DataHandlerTypes.Int32:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadInt32Async(chatReader), typeof(Int32))); break;
case DataHandlerTypes.String:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadStringAsync(chatReader), typeof(string))); break;
case DataHandlerTypes.IBuffer:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadIBufferAsync(chatReader), typeof(IBuffer))); break;
}
ReceiveDataLoop(chatReader);
}
catch (Exception ex)
{
lock (this)
{
if (chatSocket == null)
{
// Do not print anything here - the user closed the socket.
//if ((uint)ex.HResult == 0x80072745)
//rootPage.NotifyUser("Disconnect triggered by remote device", NotifyType.StatusMessage);
//else if ((uint)ex.HResult == 0x800703E3)
//rootPage.NotifyUser("The I/O operation has been aborted because of either a thread exit or an application request.", NotifyType.StatusMessage);
}
else
{
Disconnect("Read stream failed with error: " + ex.Message);
}
}
}
}
/// <summary>
/// Invoked when the socket listener accepts an incoming Bluetooth connection.
/// </summary>
/// <param name="sender">The socket listener that accepted the connection.</param>
/// <param name="args">The connection accept parameters, which contain the connected socket.</param>
private async void OnConnectionReceived(
StreamSocketListener sender, StreamSocketListenerConnectionReceivedEventArgs args)
{
// Don't need the listener anymore
socketListener.Dispose();
socketListener = null;
try
{
socket = args.Socket;
}
catch (Exception)
{
Disconnect();
return;
}
// Note - this is the supported way to get a Bluetooth device from a given socket
var remoteDevice = await BluetoothDevice.FromHostNameAsync(socket.Information.RemoteHostName);
writer = new DataWriter(socket.OutputStream);
var reader = new DataReader(socket.InputStream);
bool remoteDisconnection = false;
// TODO: notify connected
//await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
//{
// rootPage.NotifyUser("Connected to Client: " + remoteDevice.Name, NotifyType.StatusMessage);
//});
// Infinite read buffer loop
while (true)
{
try
{
uint size = await reader.LoadAsync(sizeof(uint));
if (size < sizeof(uint))
{
remoteDisconnection = true;
return;
}
var type = DataHandler.RecognizeDataType(reader);
switch (type)
{
case DataHandlerTypes.ByteArray:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadByteArrayAsync(reader), typeof(byte[]))); break;
case DataHandlerTypes.Int32:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadInt32Async(reader), typeof(Int32))); break;
case DataHandlerTypes.String:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadStringAsync(reader), typeof(string))); break;
case DataHandlerTypes.IBuffer:
DataReceived?.Invoke(this, new DataReceivedEventArgs(await DataHandler.ReadIBufferAsync(reader), typeof(IBuffer))); break;
}
}
// Catch exception HRESULT_FROM_WIN32(ERROR_OPERATION_ABORTED).
catch (Exception ex) when((uint)ex.HResult == 0x800703E3)
{
// Client Disconnected Successfully
break;
}
}
reader.DetachStream();
if (remoteDisconnection)
{
Disconnect();
// Client Disconnected Successfully
}
}