/// <summary>
/// Отправка сообщения клиенту
/// </summary>
/// <param name="socket">сокет</param>
/// <param name="packet">пакет данных</param>
/// <param name="ct">токен прерывания задачи</param>
/// <returns></returns>
private static Task SendPacketAsync(WebSocket socket, Models.PacketModel packet, CancellationToken ct = default(CancellationToken))
{
var buffer = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(packet));
var segment = new ArraySegment <byte>(buffer);
return(socket.SendAsync(segment, WebSocketMessageType.Text, true, ct));
}
/// <summary>
/// Получение пакета от клиента
/// </summary>
/// <param name="socket">сокет</param>
/// <param name="ct">токен прерывания выполнения задачи</param>
/// <returns></returns>
private static async Task <Models.PacketModel> ReceivePacketAsync(WebSocket socket, CancellationToken ct = default(CancellationToken))
{
var buffer = new ArraySegment <byte>(new byte[8192]);
using (var ms = new MemoryStream())
{
WebSocketReceiveResult result;
do
{
ct.ThrowIfCancellationRequested();
result = await socket.ReceiveAsync(buffer, ct);
ms.Write(buffer.Array, buffer.Offset, result.Count);
}while (!result.EndOfMessage);
ms.Seek(0, SeekOrigin.Begin);
if (result.MessageType != WebSocketMessageType.Text)
{
return(null);
}
string jsonStr = Encoding.UTF8.GetString(buffer);
Models.PacketModel pack = JsonConvert.DeserializeObject <Models.PacketModel>(jsonStr);
//от клиента можно получить только сообщение
switch (pack.packetType)
{
case Models.PacketType.Message:
return(JsonConvert.DeserializeObject <Models.MessageModel>(jsonStr));
default:
return(null);
}
}
}
private async void AnalizePacket(Models.PacketModel packet, CancellationToken ct = default(CancellationToken))
{
switch (packet.packetType)
{
case Models.PacketType.Message:
Models.MessageModel packetMessage = packet as Models.MessageModel;
if (string.IsNullOrEmpty(packetMessage.dst_user))
{
//отправка сообщений всем клиентам
foreach (var socket in m_sockets)
{
if (socket.Value.State != WebSocketState.Open)
{
continue;
}
await SendPacketAsync(socket.Value, packetMessage, ct);
}
}
else
{
WebSocket socket;
if (m_sockets.TryGetValue(packetMessage.dst_user, out socket))
{
await SendPacketAsync(socket, packet, ct);
}
if (packetMessage.src_user != packetMessage.dst_user &&
m_sockets.TryGetValue(packetMessage.src_user, out socket))
{
await SendPacketAsync(socket, packet, ct);
}
}
break;
default:
return;
}
}