supersocket client https://www.cnblogs.com/franklin2018/p/11494747.html

https://www.cnblogs.com/franklin2018/p/11494747.html

由于需要在服务端和客户端持续通信，于是在网上找了好久的socket通信工具。刚开始想直接用.net自带的socket通信，后来担心不够稳定健壮，毕竟自己不专业。找来找去觉得supersocket还可以，但是说实话，他们的帮助文档写的真是太烂了，使用也不够简单易懂，折腾了一阵大致明白如何使用。

1，在nuget上引用supersocket.clientengine和supersocket.protobase

2，定义一个filter的类，protobase提供了5种预定义的方式，这里采用第二种，即定义数据头和尾的方式：

TerminatorReceiveFilter
BeginEndMarkReceiveFilter
FixedHeaderReceiveFilter
FixedSizeReceiveFilter
CountSpliterReceiveFilter

class MyBeginEndMarkReceiveFilter : BeginEndMarkReceiveFilter<StringPackageInfo>
{
    public MyBeginEndMarkReceiveFilter(string begin,string end)
    : base(Encoding.UTF8.GetBytes(begin), Encoding.UTF8.GetBytes(end))
    {
        this.begin = begin;
        this.end = end;
    }
    string begin;
    string end;
    public override StringPackageInfo ResolvePackage(IBufferStream bufferStream)
    {
        //获取接收到的完整数据，包括头和尾
        var body = bufferStream.ReadString((int)bufferStream.Length, Encoding.ASCII);
        //掐头去尾，只返回中间的数据
        body = body.Remove(body.Length - end.Length, end.Length);
        body = body.Remove(0, begin.Length);
        return new StringPackageInfo("", body, new string[] { });
    }
}

3，封装一个简单的类。初始化类的时候设置好ip，端口，数据头和尾，然后设置要发送的数据属性data，然后调用startcomm方法开始每秒发送一次请求数据到服务器，订阅接收数据的事件newReceived。如果有需要可以随时更换data的内容，或者调用stopcomm停止发送数据　　

class socketClient
{
    SuperSocket.ClientEngine.EasyClient client;
    /// <summary>
    /// 定义服务端的ip地址和端口，以及接收数据的头和尾，只有在头和尾之间的数据才算有效数据
    /// </summary>
    /// <param name="ip">ip地址</param>
    /// <param name="port">服务端口</param>
    /// <param name="startFilter">数据头</param>
    /// <param name="endFilter">数据尾</param>
    public socketClient(string ip, int port, string startFilter, string endFilter)
    {
        this.ip = ip;
        this.port = port;
        if (!string.IsNullOrEmpty(startFilter)) this.startFilter = startFilter;
        if (!string.IsNullOrEmpty(endFilter)) this.endFilter = endFilter;
        client = new SuperSocket.ClientEngine.EasyClient();
        client.Initialize(new MyBeginEndMarkReceiveFilter(this.startFilter,this.endFilter), onReceived);
    }
    string ip;
    int port;
    string startFilter = "!!!";
    string endFilter = "###";
    bool cycleSend = false;
    /// <summary>
    /// 要发送到服务端的数据
    /// </summary>
    public string data { get; set; } = "hello,this is super client
";
    public void startComm()
    {//开始循环发送数据
        cycleSend = true;
        System.Threading.Thread _thread = new System.Threading.Thread(sendData);
        _thread.IsBackground = true;
        _thread.Start();           
    }
    public void sendData()
    {//采用线程间隔一秒发送数据，防止界面卡死
        while (cycleSend)
        {
            if (!client.IsConnected)
            {
                connectToServer(ip, port);
            }
            if (client.IsConnected)
            {
                client.Send(Encoding.ASCII.GetBytes("hello,this is super client
"));
            }
            System.Threading.Thread.Sleep(1000);
        }
    }
    public void stopComm()
    {//停止循环发送数据
        cycleSend = false;
    }
    public async void connectToServer(string ip, int port)
    {//连接到服务端
        var connected = await client.ConnectAsync(new IPEndPoint(IPAddress.Parse(ip), port));
        if (connected)
        {
            //发送连接信息
            client.Send(Encoding.ASCII.GetBytes("build connection"));
        }
    }
    public System.EventHandler newReceived;
    private void onReceived(StringPackageInfo stringPackageInfo)
    {//当读取到数据，触发一个事件，方便外部接收数据
        if (newReceived != null)
        {
            newReceived(stringPackageInfo.Body, new EventArgs());
        }
    }
}