c# - 何时使用 TcpClient.ReceiveTimeout 与 NetworkStream.ReadTimeout？

Question

在编写 TCP 服务器时，我想设置读取客户端请求的超时时间:

var tcpClient = tcpListener.AcceptTcpClient();
var networkStream = tcpListener.GetStream();

tcpClient.ReceiveTimeout = 10000;
networkStream.ReadTimeout = 10000;

请看最后两行。我应该更喜欢哪一个？它们在有效性方面是否相同或有何不同？

Answer 1

Which one should I prefer?

前者和后者都会将它们内部的Socket设置为接收超时。同一个套接字将从 TcpClient 冒泡到创建的 NetworkStream，所以我选择前者。

Are they equal in terms of effectivity or in which way to they differ?

我们可以查看 source code 是件好事.这是 TcpClient.ReceiveTimeout :

public int ReceiveTimeout 
{
    get 
    {
        return numericOption(SocketOptionLevel.Socket,
                             SocketOptionName.ReceiveTimeout);
    }
    set 
    {
        Client.SetSocketOption(SocketOptionLevel.Socket,
                          SocketOptionName.ReceiveTimeout, value);
    }
}

设置底层客户端套接字的接收超时(Client 是 Socket 类型)。然后传递给NetworkStream:

public NetworkStream GetStream() 
{
    // Shortened for brevity
    if (m_DataStream==null)
    {
        m_DataStream = new NetworkStream(Client, true);
    }
    return m_DataStream;
}

当 NetworkStream 查找超时时，它会在 Socket 中查找:

public override int ReadTimeout 
{ 
    get 
    {
        int timeout = (int)m_StreamSocket.GetSocketOption(SocketOptionLevel.Socket,
                                                          SocketOptionName.ReceiveTimeout);
        if (timeout == 0) 
        {
            return -1;
        }
    }
    return timeout;
}