internal static async Task ReceiveAndReplyClientMessage(TcpClient clientWssAccepted, NetworkStream clientStream, byte[] wssReceivedBytes, HttpRequest firstRequestOfHandShake)
{
bool fin = (wssReceivedBytes[0] & 0b10000000) != 0;
bool mask = (wssReceivedBytes[1] & 0b10000000) != 0; // must be true, "All messages from the client to the server have this bit set"
int opcode = wssReceivedBytes[0] & 0b00001111, // expecting 1 - text message
msglen = wssReceivedBytes[1] - 128, // & 0111 1111
offset = 2;
if (msglen == 126)
{
// was ToUInt16(bytes, offset) but the result is incorrect
msglen = BitConverter.ToUInt16(new byte[] { wssReceivedBytes[3], wssReceivedBytes[2] }, 0);
offset = 4;
}
else if (msglen == 127)
{
Console.WriteLine("TODO: msglen == 127, needs qword to store msglen");
// i don't really know the byte order, please edit this
// msglen = BitConverter.ToUInt64(new byte[] { bytes[5], bytes[4], bytes[3], bytes[2], bytes[9], bytes[8], bytes[7], bytes[6] }, 0);
// offset = 10;
}
if (msglen == 0)
{
Console.WriteLine("msglen == 0");
}
else if (mask)
{
byte[] decoded = new byte[msglen];
byte[] masks = new byte[4] {
wssReceivedBytes[offset], wssReceivedBytes[offset + 1], wssReceivedBytes[offset + 2], wssReceivedBytes[offset + 3]
};
offset += 4;
for (int i = 0; i < msglen; ++i)
{
decoded[i] = (byte)(wssReceivedBytes[offset + i] ^ masks[i % 4]);
}
string receivedFromClient = Encoding.UTF8.GetString(decoded);
var wssResponse = await RoutingHandler.HandleWss(new HttpRequest()
{
UrlRelative = firstRequestOfHandShake.UrlRelative,
Method = "wss",
CreatedAt = DateTime.Now,
Body = receivedFromClient,
RemoteEndPoint = clientWssAccepted.Client.RemoteEndPoint.ToString()
});
WebsocketServerHub.Send(clientWssAccepted, clientStream, wssResponse);
}
else
{
Console.WriteLine("mask bit not set");
}
}
public static void Publish(string urlRelative, IResponse response)
{
if (_channel.TryGetValue(urlRelative, out BlockingCollection <KeyValuePair <TcpClient, NetworkStream> > clients) &&
clients != null)
{
List <Task> tasks = new List <Task>();
foreach (var client in clients)
{
tasks.Add(Task.Run(() =>
{
if (!client.Key.Client.Connected)
{
WebsocketServerHub.Remove(urlRelative);
return;
}
WebsocketServerHub.Send(client.Key, client.Value, response);
}));
}
//want to make sure sent all to client
//Task.WhenAll(tasks).GetAwaiter().GetResult();
}
}