Question

我一直在尝试使用TCPClient在C＃中编写IRC bot。它连接并开始接收命令，使用PONG命令响应PING命令。就是这样。

但是，出于某种原因，它会在30到40分钟后挂起，以便读取下一行数据。我使用Wireshark检查了PING和PONG消息，它们看起来很好。服务器也接收到PONG，因为我看到我的计算机在Wireshark中收到了一个ACK数据包。

奇怪的是它在30到40分钟内完全正常。我怀疑我在使用StreamReader做错了什么，但在网上搜索了几天之后我就陷入了困境。

有人会非常善良地查看我的代码吗？非常感谢。

public class Bot
{
    private NetworkStream ns;
    private StreamReader reader;
    private StreamWriter writer;
    private Encoding enc;           // The encoding used.

    /// <summary>
    /// Initialize the bot.
    /// </summary>
    public Bot()
    {
        enc = new UTF8Encoding();
    }

    /// <summary>
    /// Connects the an IRC server.
    /// </summary>
    /// <param name="url">The url of the server.</param>
    /// <param name="port">The port to connect to.</param>
    /// <param name="user">The username to use.</param>
    /// <param name="nick">The nick to use.</param>
    /// <param name="realName">The users real name.</param>
    public void Connect(string url, ushort port, string user, string nick, string realName)
    {
        TcpClient client = new TcpClient();

        try
        {
            client.Connect(url, port);
        }
        catch (Exception ex)
        {
            throw new Exception("Could not connect to endpoint.", ex);
        }

        ns = client.GetStream();
        reader = new StreamReader(ns, enc);
        writer = new StreamWriter(ns, enc);
        writer.AutoFlush = true;

        Send("USER " + user + " 0 * :" + realName + "\r\n");
        Send("NICK " + nick + "\r\n");
    }

    /// <summary>
    /// Processes a command.
    /// </summary>
    /// <param name="command">The command to process.</param>
    public virtual void ProcessCommand(IRCCommand command)
    {
        if(command.Command == "PING")
        {
            Send("PONG :" + command.Parameters[0] + "\r\n");
        }
    }

    /// <summary>
    /// Receives and processes a command.
    /// </summary>
    public void ReceiveAndProcess()
    {
        string line = reader.ReadLine();

        if (!string.IsNullOrEmpty(line))
        {
            Console.WriteLine("raw : " + line);

            IRCCommand cmd = new IRCCommand();
            cmd.Parse(line);

            ProcessCommand(cmd);
        }
    }

    /// <summary>
    /// Sends a command to the irc server.
    /// </summary>
    /// <param name="ircCommand">The command to send.</param>
    protected void Send(string ircCommand)
    {
        Console.Write("sent: " + ircCommand);
        writer.Write(ircCommand);
    }
}

Answer 1

我发现问题不在TCPClient的实际读数中。问题是我的ISP在频道停用30分钟后关闭了连接。因为IRC乒乓是从互联网到（机器人）用户的连续请求 - 回复。我的ISP可能会将此类请求 - 回复活动视为潜在的僵尸网络并关闭连接。

为了防止这种情况，我改变了我的机器人每分钟将PING发送到服务器。随着这种变化，机器人已经稳定整整一周（24/7）。

.NET IRC TCPClient在30-40分钟后读取挂起

1 个答案: