/// <summary>
/// Registers a stream handler on this channel.
/// </summary>
/// <param name="handler">A <see cref="IEventStreamHandler"/>, or null to deregister.</param>
public void SetStreamHandler(IEventStreamHandler handler)
{
BinaryMessageHandler binaryHandler = null;
if (handler != null)
{
binaryHandler = new IncomingStreamRequestHandler(this, handler).OnMessage;
}
BinaryMessenger.SetMessageHandler(Name, binaryHandler);
}
public void SetMessageHandler(string channel, BinaryMessageHandler handler)
{
if (handler == null)
{
_handlers.Remove(channel);
FlutterDesktopMessengerSetCallback(_messenger, channel, null, IntPtr.Zero);
return;
}
_handlers[channel] = handler;
FlutterDesktopMessengerSetCallback(_messenger, channel, _messageCallback, IntPtr.Zero);
}
async void BeginReceiveMessages()
{
isReceiving = true;
while (isReceiving && client.State == WebSocketState.Open)
{
WebSocketReceiveResult receiveResult = null;
using (var ms = new MemoryStream())
{
do
{
receiveResult = await client.ReceiveAsync(clientBuffer, CancellationToken.None);
ms.Write(clientBuffer.Array, clientBuffer.Offset, receiveResult.Count);
}while (!receiveResult.EndOfMessage);
ms.Seek(0, SeekOrigin.Begin);
// close socket if requested by server, return
if (receiveResult.MessageType == WebSocketMessageType.Close)
{
await CloseSocket(receiveResult.CloseStatusDescription);
return;
}
if (receiveResult.MessageType == WebSocketMessageType.Binary)
{
BinaryMessageHandler?.OnMessageReceived(ms);
}
else if (receiveResult.MessageType == WebSocketMessageType.Text)
{
TextMessageHandler?.OnMessageReceived(ms);
}
}
}
}