tcp 客户端进行拆包

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心跳机制服务器

Server

 TcpListener listen;public Server(IPAddress ip,int port) {listen = new TcpListener(ip, port);} public void Start(){listen.Start(100);StartConnect();  }Dictionary<string,TcpClient> clientDic = new Dictionary<string,TcpClient>();public event Action<TcpClient> 有客户端连入的事件; void StartConnect(){Task.Run(() =>{while (true) {TcpClient client = listen.AcceptTcpClient();string ip = client.Client.RemoteEndPoint.ToString(); clientDic.Add(ip, client);有客户端连入的事件?.Invoke(client);startRead(client);//读取粘包的数据，在这个方法进行拆包处理}});}//拆包public void startRead(TcpClient t1){//接受客户端发来的数据NetworkStream stream = t1.GetStream();string ip = t1.Client.RemoteEndPoint.ToString();byte[] bs = new byte[1024 * 1024];Task.Run(() =>{try{while (true){int count=  stream.Read(bs, 0, bs.Length);if (count== 0){throw new Exception("客户端断了");}//接受数据byte[] body = bs.Take(count).ToArray();string s = Encoding.UTF8.GetString(body);Console.WriteLine("-------------------------------");Console.WriteLine("接收到消息为:"+s);Console.WriteLine("-------------------------------");Send(s);// 群发}}catch (Exception ex){clientDic.Remove(ip);}});}public event Action<string> 客户端断开事件; public event Action<TcpClient, byte[]> 接受到消息的事件;public Server(){}//群发方法 向所有的客户端发消息public void Send(string content){byte[] bs = Encoding.UTF8.GetBytes(content);foreach (var item in clientDic) //遍历所有的客户端{item.Value.GetStream().Write(bs, 0, bs.Length);}}//指定给谁发public void Send(string content,string ip) {byte[] bs = Encoding.UTF8.GetBytes(content);//根据ip取出客户端，从字典取clientDic[ip].GetStream().Write(bs, 0, bs.Length);}//指定给哪些客户端发//send("你好", ["192.","127"])public void Send(string content, string[] ips){byte[] bs = Encoding.UTF8.GetBytes(content);foreach (var item in clientDic) //所有客户端{//item.key 键 ip字符串//item.value 值 客户端对象if (ips.Contains(item.Key)){//如果ips数组包含目标客户端item.Value.GetStream().Write(bs, 0, bs.Length);}}}

Program

static Server s;static void Main(string[] args){s = new Server(IPAddress.Any,8080);s.有客户端连入的事件 += f1;s.接受到消息的事件 += f2;s.Start();Console.ReadKey();}public static void f1(TcpClient t1){Console.WriteLine(t1.Client.RemoteEndPoint.ToString()+"连接到服务器");}public static void f2(TcpClient t2, byte[] bs){Console.WriteLine(t2.Client.RemoteEndPoint.ToString()+"发来的消息为+++++++++++:"+ Encoding.UTF8.GetString(bs,0,bs.Length));}

客户端

TcpClient client;public Form1(){InitializeComponent();client = new TcpClient();client.Connect("192.168.107.60",8080);// 开始接收数据startReceive(client);}void startReceive(TcpClient t1){byte[] bs = new byte[1024]; // 缓存区Task.Run(() =>{try{while (true){int count = t1.GetStream().Read(bs, 0, bs.Length);if(count == 0){Console.WriteLine("服务器断开");break;}// 去掉数据最后一位占位0byte[] data = bs.Take(count).ToArray();// 需不需要拆包Console.WriteLine(Encoding.UTF8.GetString(data));if(lastPack != null){data = lastPack.Concat(data).ToArray();lastPack = null;}ChaiBao(data, 0, t1);}}catch (Exception ex){Console.WriteLine("客户端断开");}});}byte[] lastPack = null;// 上一个半包public void ChaiBao(byte[] bs,int startIndex,TcpClient t1){if (startIndex + 4 > bs.Length){lastPack = bs.Skip(startIndex).ToArray(); // 跳过开始位置取出后面的return;}// 记录第一个包的长度int len = BitConverter.ToInt32(bs, startIndex);// 取出之前所有包的长度int abc = len + startIndex + 4;Console.WriteLine(abc + "?????" + bs.Length);if(abc == bs.Length){byte[] bs1 = bs.Skip(startIndex + 4).ToArray();richTextBox1.Invoke((Action)(() =>{richTextBox1.AppendText(Encoding.UTF8.GetString(bs1) + "\n");}));}else if (abc < bs.Length){byte[] bs2 = bs.Skip(startIndex + 4).Take(len).ToArray();richTextBox1.Invoke((Action)(() =>{richTextBox1.AppendText(Encoding.UTF8.GetString(bs2) + "\n");richTextBox1.SelectionStart = richTextBox1.Text.Length;richTextBox1.ScrollToCaret();}));// 继续拆包ChaiBao(bs, abc, t1);}else{lastPack = bs.Skip(startIndex).ToArray();}}

直接发消息

调用MemoryStream进行添加数据长度的方法

Send(client.GetStream(), "大帅的几种形态");
Send(client.GetStream(), "精致大帅");
Send(client.GetStream(), "油腻大帅");
Send(client.GetStream(), "虚币大帅");
Send(client.GetStream(), "变态大帅");
Send(client.GetStream(), "人妻大帅");

没有使用MemoryStream进行添加数据长度

 Send("罗罗诺亚·索隆");Send("蒙奇·D·路飞");Send("文斯莫克·山治");Send("托尼托尼·乔巴");Send("妮可·罗宾");

MemoeySteream内存流把数据长度和数据内容写在一个包里

void Send(NetworkStream stream, string msg)
{byte[] bs = Encoding.UTF8.GetBytes(msg); // 先转成字符节数组MemoryStream ms = new MemoryStream();// 创建内存流BinaryWriter bw = new BinaryWriter(ms); // 创建内存流bw.Write(bs.Length);// 写入长度bw.Write(bs);// 写入内容stream.Write(ms.ToArray(), 0, ms.ToArray().Length);// 发送内容流bw.Close();// 关闭写入对象ms.Close();// 关闭内存流
}void Send(string msg)
{byte[] bs = Encoding.UTF8.GetBytes(msg); // 把发的消息转成字节数组// BitConverter 转成位数据// 把字节数组长度转成位格式数据byte[] len = BitConverter.GetBytes(bs.Length);byte[] body = len.Concat(bs).ToArray(); // 把数据长度和内容存在一个包里面    client.GetStream().Write(body, 0, body.Length);}

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