通過TCP發送大對象：“解析完成之前遇到的流結束”

Question

每當我嘗試從NetworkStream反序列化雙精度列表時，我一直收到SerializationException ：

解析完成之前遇到的流結束

我有一個簡單的客戶端服務器架構：我的TcpTransportClient包含TcpClient的功能，我使用兩種基本方法： Send （發送消息）和Receive （阻塞直到收到消息）。

Send函數接收Message ，使用BinaryFormatter對其進行序列化，並通過NetworkStream發送字節。

public void Send(Message message)
{
    if (message == null)
    {
        throw new TransportException("Invalidate Parameter In Send Call");
    }

    if (_tcpClient == null || !_tcpClient.Connected)
    {
        throw new TransportException("Client Not Connected");
    }

    lock (_sync)
    {
        // Serialzie the message
        MemoryStream memStream = new MemoryStream();
        _serializer.Serialize(memStream, message);

        // Get the bytes of of the memory stream
        byte[] buffer = memStream.GetBuffer();

        // Write the message to the network stream
        NetworkStream networkStream = _tcpClient.GetStream();
        networkStream.Write(buffer, 0, buffer.Length);
        networkStream.Flush();
    }
}

receive函數從NetworkStream中將字節讀入緩沖區，然后使用BinaryFormatter對消息進行反序列化：

public Message Receive()
{
    if (_tcpClient == null || !_tcpClient.Connected)
    {
        throw new TransportException("Client Not Connected");
    }

    byte[] buffer;
    MemoryStream memStream = new MemoryStream();
    NetworkStream netStream = _tcpClient.GetStream();
    try
    {
        do
        {
            // Allocate a new buffer
            buffer = new byte[_tcpClient.ReceiveBufferSize];

            // Read the message buffer
            int sizeRead = netStream.Read(buffer, 0, buffer.Length);

            // Write the buffer to the memory stream
            memStream.Write(buffer, 0, sizeRead);

        } while (netStream.DataAvailable);

        // Reset the memory stream position
        memStream.Position = 0;

        // Deserialize the message
        object tmp = _deserializer.Deserialize(memStream); // <-- The exception is here!

        // Cast the object to a message
        return (Message)tmp;
    }
    catch (System.Exception e)
    {
        if (_tcpClient == null || !_tcpClient.Connected)
        {
            throw new TransportException("Client Not Connected");
        }
        else
        {
            throw e;
        }
    }
}

我有一個基本的發送線程：

TcpTransportClient client = new TcpTransportClient(GetLocalAddress(), servicePort);
client.Connect();

Thread sendThread = new Thread(() =>
{
    List<double> dataSet = new List<double>();
    for (double d = 0.0; d < 500.0; d++)
    {
        dataSet.Add(d);
    }

    while (true)
    {
        try
        {
            // Serialize the data set
            MemoryStream memStream = new MemoryStream();
            BinaryFormatter binFormat = new BinaryFormatter();
            binFormat.Serialize(memStream, (object)dataSet);

            // Create a message
            Message msg = new Message();

            // Hold the object bytes in an opaque field
            msg.SetFieldValue(1000, memStream.GetBuffer());

            // Set the message topic
            msg.SetTopic("client.dataSet");

            // Send the message
            client.Send(msg);

            // Sleep
            Thread.Sleep(3000);
        }
        catch (TransportException)
        {
            break;
        }
        catch(Exception)
        {
            //ignore it
        }
    }
});
sendThread.IsBackground = true;
sendThread.Start();

並且只要接受TcpClient就會啟動一個接收線程：

public void HandleAcceptedClient(TcpTransportClient client)
{
    Thread receiveThread = new Thread(() =>
    {
        while (true)
        {
            try
            {
                Message msg = client.Receive();
                Trace.WriteLine("Server Received: " + msg.GetTopic());
                byte[] buffer = msg.GetFieldOpaqueValue(1000);
                MemoryStream memStream = new MemoryStream(buffer);
                BinaryFormatter binFormat = new BinaryFormatter();

                List<double> dataSet = (List<double>)binFormat.Deserialize(memStream);
                if (dataSet.Count == 500)
                {
                    Trace.WriteLine(DateTime.Now + ": OK");
                }
                else
                {
                    Trace.WriteLine(DateTime.Now + ": FAIL");
                }
            }
            catch (TransportException)
            {
                break;
            }
            catch(Exception)
            {
                // ignore it
            }

        }

    });
    receiveThread.IsBackground = true;
    receiveThread.Start();
}

當我嘗試在我的TcpTransportClient Receive方法中反序列化消息時，總會發生異常，但只有在數據集中放入一些數據時才會出現問題。 通過網絡發送值列表並在接收端成功反序列化的正確方法是什么？

PS我在一個幾乎相同的問題中嘗試了解決方案，但它沒有用：我仍然得到同樣的例外。

Answer 1

while（netStream.DataAvailable）;

那不對。 當Read（）調用返回0時，您應該停止讀取.DataAvailable屬性只是告訴您Read（）調用是否將阻塞，等待允許服務器趕上。

Answer 2

你需要消息框架 。