/*
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
* IMPLEMENTATIONS
*/
private static async Task <ServerSocketResponse> ReceiveResponseAsync(WebSocket socket, CancellationToken ct = default(CancellationToken))
{
try
{
ServerSocketResponse response = new ServerSocketResponse();
response.Stream = new MemoryStream();
var buffer = new ArraySegment <byte>(new byte[8192]);
WebSocketReceiveResult result;
do
{
ct.ThrowIfCancellationRequested();
result = await socket.ReceiveAsync(buffer, ct);
response.Stream.Write(buffer.Array, buffer.Offset, result.Count);
}while (!result.EndOfMessage);
response.Stream.Seek(0, SeekOrigin.Begin);
response.Type = result.MessageType;
return(response);
}
catch (Exception e)
{
return(null);
}
}
public async Task CallInvoke(HttpContext context)
{
CancellationToken ct = context.RequestAborted;
WebSocket currentSocket = await context.WebSockets.AcceptWebSocketAsync();
var socketId = Guid.NewGuid().ToString();
_sockets.TryAdd(socketId, currentSocket);
await this.OnClientConnect(socketId);
while (true)
{
if (ct.IsCancellationRequested)
{
break;
}
ServerSocketResponse package = await ReceiveResponseAsync(currentSocket);
if (!package.HasTransimssion)
{
if (currentSocket.State != WebSocketState.Open)
{
break;
}
if (this.CloseIfConnectionProblem(socketId))
{
break;
}
}
else
{
await this.OnReceiveMessage(socketId, package);
}
}
WebSocket dummy;
_sockets.TryRemove(socketId, out dummy);
await currentSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing", ct);
currentSocket.Dispose();
await this.OnClientDisconect(socketId);
}
/*
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
* APSTRACTIOn
*/
protected virtual Task OnReceiveMessage(string uid, ServerSocketResponse package) => Task.FromResult(default(object));