没有协议(protocol)的 C# SuperSocket

Question

问题很简单:我已经阅读了整个 SuperSocket文档，但我不明白是否有一种方法可以在不实现协议(protocol)的情况下使用它。

我不需要发送特定的命令，而只需要发送一个字节或数百个字节，具体取决于多种因素。我需要更新一个使用简单套接字的旧 TCP 服务器，它是我在 4 多年前使用 System.Net.Sockets 库制作的，我想使用像 SuperSocket 这样的 well note 库实现更强大的解决方案。

这是个好主意吗？

提前谢谢你。

Answer 1

您不必实现协议(protocol)，您可以通过实现接口(interface)简单地创建一个ReceiveFilter:IReceiveFilter。

因此，首先创建一个如下所示的自定义 RequestInfo 类:

public class MyRequestInfo : IRequestInfo
{
    public string Key { get; set; }
    public string Unicode { get; set; }

    // You can add more properties here
}

然后创建 ReceiveFilter - ReceiveFilter 基本上是过滤所有传入消息的类。如果您不想实现协议(protocol)，这就是您所需要的。

public class MyReceiveFilter: IReceiveFilter<MyRequestInfo>
{

// This Method (Filter) is called whenever there is a new request from a connection/session 
//- This sample method will convert the incomming Byte Array to Unicode string

    public MyRequestInfo Filter(byte[] readBuffer, int offset, int length, bool toBeCopied, out int rest)
    {
        rest = 0;

        try
        {
            var dataUnicode = Encoding.Unicode.GetString(readBuffer, offset, length);
            var deviceRequest = new MyRequestInfo { Unicode = dataUnicode };
            return deviceRequest;
        }
        catch (Exception ex)
        {
            return null;
        }
    }

    public void Reset()
    {
        throw new NotImplementedException();
    }

    public int LeftBufferSize { get; }
    public IReceiveFilter<MyRequestInfo> NextReceiveFilter { get; }
    public FilterState State { get; }
}

下一步是创建自定义 AppSession。 Session就像客户端连接时服务器为其创建一个 session ，当客户端断开连接或服务器关闭连接时被销毁。这适用于需要客户端连接然后服务器必须发送 ACKnowledgement 以便客户端发送下一条消息的情况。

public class MyAppSession : AppSession<MyAppSession, MyRequestInfo>
{
    // Properties related to your session.

    public int ClientKey { get; set; }

    public string SomeProperty { get; set; }

}

最后一步是创建自定义 AppServer

// Here you will be telling the AppServer to use MyAppSession as the default AppSession class and the MyRequestInfo as the defualt RequestInfo

public class MyAppServer : AppServer<MyAppSession, MyRequestInfo>
{
// Here in constructor telling to use MyReceiveFilter and MyRequestInfo

    protected MyAppServer() : base(new DefaultReceiveFilterFactory<MyReceiveFilter, MyRequestInfo>())
    {
        NewRequestReceived += ProcessNewMessage;
    }

    // This method/event will fire whenever a new message is received from the client/session
    // After passing through the filter
    // the requestInfo will contain the Unicode string
    private void ProcessNewMessage(MyAppSession session, MyRequestInfo requestinfo)
    {
        session.ClientKey = SessionCount;

        // Here you can access the Unicode strings that where generated in the MyReceiveFilter.Filter() Method.

        Console.WriteLine(requestinfo.Unicode );

        // Do whatever you want

        session.Send("Hello World");


        session.Close();
    }
}

您还可以覆盖 AppServer 类的其他方法，例如:OnSessionClosed 或 OnNewSessionConnected

就是这样 - 然后您只需初始化并启动服务器:

            var myAppServer = new MyAppServer();

            if (!myAppServer.Setup(2012))
            {
                _logger.LogMessage(MessageType.Error, string.Format("Failed to setup server"));
                return;
            }
            if (!myAppServer.Start())
            {
                _logger.LogMessage(MessageType.Error, string.Format("Failed to start server"));
                return;
            }