public async Task Invoke(HttpContext context, ICustomWebSocketFactory wsFactory,
ICustomWebSocketMessageHandler wsmHandler)
{
if (context.Request.Path == "/ws")
{
if (context.WebSockets.IsWebSocketRequest)
{
string username = context.Request.Query["u"];
if (!string.IsNullOrEmpty(username))
{
WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync();
CustomWebSocket userWebSocket =
new CustomWebSocket(webSocket, username + new Random().Next(0, 100));
wsFactory.Add(userWebSocket);
await wsmHandler.HandleNewUserMessage(wsFactory);
await Listen(context, userWebSocket, wsFactory, wsmHandler);
}
}
else
{
context.Response.StatusCode = 400;
}
}
await _next(context);
}
public void Add(CustomWebSocket uws)
{
if (List.Any(o => o.Username == uws.Username))
{
Remove(uws.Username);
}
List.Add(uws);
}
private async Task Listen(HttpContext context, CustomWebSocket userWebSocket, ICustomWebSocketFactory wsFactory, ICustomWebSocketMessageHandler wsmHandler)
{
WebSocket webSocket = userWebSocket.WebSocket;
var buffer = new byte[1024 * 4];
WebSocketReceiveResult result = await webSocket.ReceiveAsync(new ArraySegment <byte>(buffer), CancellationToken.None);
while (!result.CloseStatus.HasValue)
{
await wsmHandler.HandleMessage(buffer, wsFactory);
buffer = new byte[1024 * 4];
result = await webSocket.ReceiveAsync(new ArraySegment <byte>(buffer), CancellationToken.None);
}
wsFactory.Remove(userWebSocket.Username);
await webSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
}