Question

我有一些代码，可以使用TcpClient发送文件数据，但这太慢了。

发送10个字节的样本数据，数据将按预期发送和接收。

仅发送几MB的文件就需要很长时间

public static void SendBytes(TcpClient clientSocket, byte[] outStream)
{
    Debug.WriteLine("SendBytes() number of bytes: " + outStream.Length.ToString());

    byte[] encoded_outStream = EncoderDecoder.Encoder(outStream);

    NetworkStream serverStream = clientSocket.GetStream();

    byte[] rv = new byte[encoded_outStream.Length + ProgramState.end_networkdata_bytes.Length];

    System.Buffer.BlockCopy(encoded_outStream, 0, rv, 0, encoded_outStream.Length);
    System.Buffer.BlockCopy(ProgramState.end_networkdata_bytes, 0, rv, encoded_outStream.Length, ProgramState.end_networkdata_bytes.Length);

    serverStream.Write(rv, 0, rv.Length);
    serverStream.Flush();
}

private static int MAX_SIZE = 500000000;
public static byte[] ReceiveBytes(TcpClient clientSocket)
{
    Debug.WriteLine("[" + DateTime.Now.ToString("G") + "] - " + "ReceiveBytes() started.");
    clientSocket.NoDelay = true;
    NetworkStream networkStream = clientSocket.GetStream();

    byte[] bytesFrom = new byte[MAX_SIZE];
    clientSocket.ReceiveBufferSize = MAX_SIZE;

    networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);

    int index = GetFirstOccurance(ProgramState.end_networkdata_bytes[0], bytesFrom);
    Debug.WriteLine("ReceiveBytes(), SubArray index: " + index.ToString());

    byte[] tmp_res = bytesFrom.SubArray(0, index);
    byte[] res = EncoderDecoder.Decoder(tmp_res);

    Debug.WriteLine("ReceiveBytes() number of bytes: " + res.Length.ToString());
    return res;
}

编辑：用于接收多个数据块的代码

    private static int MAX_SIZE = 10000;
    public static byte[] ReceiveBytes(TcpClient clientSocket)
    {
        Debug.WriteLine("[" + DateTime.Now.ToString("G") + "] - " + "ReceiveBytes() started.");
        clientSocket.NoDelay = true;

        NetworkStream networkStream = clientSocket.GetStream();

        clientSocket.ReceiveBufferSize = MAX_SIZE;

        byte[] tmp_bytesFrom = new byte[MAX_SIZE];


        while(GetFirstOccurance(ProgramState.end_networkdata_bytes[0], tmp_bytesFrom) < 0)
        {
            networkStream.Read(tmp_bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);
        }

        Debug.WriteLine("[" + DateTime.Now.ToString("G") + "] - " + "ReceiveBytes(), received number of raw bytes: " + tmp_bytesFrom.Length.ToString());
        return tmp_bytesFrom;
    }

在发送几个MB（7.5 MB）的文件时，ReceiveBytes（）函数大约需要9分钟。注意： 1. Encoder（）和Decoder（）函数不会影响我的速度。 2.减小缓冲区大小不会使接收速度更快。（已测试）。

NetworkStream Read（）太慢，需要约9分钟才能获得7.5 MB

0 个答案: