Websocket服务器未从客户端获取所有消息

Question

使用.net控制台应用程序，我创建了一个websocket服务器。还有一个用于客户端的单独应用。

我已使用此网页创建服务器端代码（https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_server）。所以我的主要功能是这样的：

    public static void Main()
    {
        string ip = "127.0.0.1";
        int port = 80;
        var server = new TcpListener(IPAddress.Parse(ip), port);

        server.Start();
        Console.WriteLine("Server has started on {0}:{1}, Waiting for a connection...", ip, port);

        TcpClient client = server.AcceptTcpClient();
        Console.WriteLine("A client connected.");

        NetworkStream stream = client.GetStream();

        // enter to an infinite cycle to be able to handle every change in stream
        while (true)
        {
            while (!stream.DataAvailable) ;
            while (client.Available < 3) ; // match against "get"

            byte[] bytes = new byte[client.Available];
            stream.Read(bytes, 0, client.Available);
            string s = Encoding.UTF8.GetString(bytes);

            if (Regex.IsMatch(s, "^GET", RegexOptions.IgnoreCase))
            {
                Console.WriteLine("=====Handshaking from client=====\n{0}", s);

                // 1. Obtain the value of the "Sec-WebSocket-Key" request header without any leading or trailing whitespace
                // 2. Concatenate it with "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" (a special GUID specified by RFC 6455)
                // 3. Compute SHA-1 and Base64 hash of the new value
                // 4. Write the hash back as the value of "Sec-WebSocket-Accept" response header in an HTTP response
                string swk = Regex.Match(s, "Sec-WebSocket-Key: (.*)").Groups[1].Value.Trim();
                string swka = swk + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
                byte[] swkaSha1 = System.Security.Cryptography.SHA1.Create()
                    .ComputeHash(Encoding.UTF8.GetBytes(swka));
                string swkaSha1Base64 = Convert.ToBase64String(swkaSha1);

                // HTTP/1.1 defines the sequence CR LF as the end-of-line marker
                byte[] response = Encoding.UTF8.GetBytes(
                    "HTTP/1.1 101 Switching Protocols\r\n" +
                    "Connection: Upgrade\r\n" +
                    "Upgrade: websocket\r\n" +
                    "Sec-WebSocket-Accept: " + swkaSha1Base64 + "\r\n\r\n");

                stream.Write(response, 0, response.Length);
            }
            else
            {
                bool fin = (bytes[0] & 0b10000000) != 0,
                    mask = (bytes[1] & 0b10000000) !=
                           0; // must be true, "All messages from the client to the server have this bit set"

                int opcode = bytes[0] & 0b00001111, // expecting 1 - text message
                    msglen = bytes[1] - 128, // & 0111 1111
                    offset = 2;

                if (msglen == 126)
                {
                    // was ToUInt16(bytes, offset) but the result is incorrect
                    msglen = BitConverter.ToUInt16(new byte[] {bytes[3], bytes[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]
                        {bytes[offset], bytes[offset + 1], bytes[offset + 2], bytes[offset + 3]};
                    offset += 4;

                    for (int i = 0; i < msglen; ++i)
                        decoded[i] = (byte) (bytes[offset + i] ^ masks[i % 4]);

                    string text = Encoding.UTF8.GetString(decoded);
                    Console.WriteLine("{0}", text);
                }
                else
                    Console.WriteLine("mask bit not set");

                Console.WriteLine();
            }
        }
    }

我的客户端控制台应用程序使用Websocket-Sharp库（https://github.com/sta/websocket-sharp/）。主要逻辑是：

        using (var ws = new WebSocketSharp.WebSocket("ws://localhost"))
        {
            ws.OnMessage += (sender, e) => Console.WriteLine("Server says: " + e.Data);

            ws.Connect();

            for (var i = 0; i < 1000; i++)
            {
                ws.Send($"hello {i}");
                Console.WriteLine($"hello {i}");
                //Thread.Sleep(2000);
            }
        }

客户端成功发送了1000条消息，但是在服务器端，它没有收到所有消息。邮件中存在巨大的空白（即，它们没有错，邮件丢失了）。

有人知道为什么会这样吗？为什么消息消失了？