ProtoBuff3 unity_TCP网络发包解包&&消息订阅
using Google.Protobuf;
//using Google.Protobuf.Examples.AddPerson;
using Google.Protobuf.WellKnownTypes;
using System;
using System.Net.Sockets;
using UnityEngine;
using ARProto;
using pb = global::Google.Protobuf;
public class NewBehaviourScript : MonoBehaviour
{
void OnGUI()
{
if (GUI.Button(new Rect(100, 10, 120, 100), new GUIContent("Button", "Go")))
{
UIGo();
}
}
public void UIGo()
{
Person person =new Person();
person.Id=01;
AddPerson addPerson =new AddPerson();
SendMsg(addPerson);
}
// Use this for initialization
void Start()
{
StartConnect();
}
TcpClient tcpClient; //
byte[] receive_buff; // 专门用来接收Socket里面的数据的
byte[] data_buff; // 用来存当前未处理的数据
CodedOutputStream outputStream; // 用来绑定SocketStream，方便把proto对象转换成字节流Stream输送给服务器
void StartConnect()
{
TcpClient client = new TcpClient();
tcpClient = client;
//这里写上你自己服务器的ip和端口
client.Connect("106.2.124.243", 9090);
receive_buff = new byte[client.ReceiveBufferSize];
outputStream = new CodedOutputStream(client.GetStream());
// 监听一波服务器消息
client.GetStream().BeginRead(receive_buff, 0, client.ReceiveBufferSize, ReceiveMessage, null);
}
int nFalg = 0; // 这个变量主要是为了防止和服务端无休无止互发消息，测试代码
void Update()
{
// 因为ReceiveMessage接收数据是异步的方式，不是在主线程，有些方法不能用，比如ToString，所以消息处理放在这里处理
// 但主要是因为后面要加上消息广播，可以添加在这里
if (data_buff != null && ++nFalg < 5)
{
// 把数据传给CodedInputStream计算本次包的长度
CodedInputStream inputStream = new CodedInputStream(data_buff);
int length = inputStream.ReadLength();
// 计算"包长度"占用的字节数，后面取数据的时候扣掉这个字节数，就是真实数据长度
int lengthLength = CodedOutputStream.ComputeLengthSize(length);
// 当前数据足够解析一个包了
if (length + lengthLength <= data_buff.Length)
{
byte[] real_data = new byte[length];
// 拷贝真实数据
Array.Copy(data_buff, lengthLength, real_data, 0, length);
// 假设服务器给你发了个AddressBook
AddPerson ab = AddPerson.Parser.ParseFrom(real_data);
// 把这个数据直接还给服务器，验证客户端发给服务器的情况
SendMsg(ab);
// 数据刚刚好，没有多余的
if (length + lengthLength == data_buff.Length)
{
data_buff = null;
}
else
{
// 数据有剩余，保存剩余数据，等下一个Update解析
byte[] t = new byte[data_buff.Length - length - lengthLength];
Array.Copy(data_buff, lengthLength + length, t, 0, t.Length);
data_buff = t;
}
}
}
}
// 发送数据
public void SendMsg( pb::IMessage<AddPerson> message)
{
if (outputStream != null)
{
// WriteMessage 里面会先write一个长度，然后再write真实数据
//// outputStream.WriteMessage(message);
outputStream.Flush(); // 把buffer数据写入到tcpClient的流里面
}
}
public void ReceiveMessage(IAsyncResult ar)
{
Debug.Log("消息：" + receive_buff);
try
{
// 本次接收到的数据长度
int bytesRead = tcpClient.GetStream().EndRead(ar);
if (bytesRead < 1)
{
Debug.LogError("bytesRead < 1");
return;
}
else
{
if (data_buff == null)
{
// buff里面没有数据
data_buff = new byte[bytesRead];
Array.Copy(receive_buff, data_buff, bytesRead);
}
else
{
// buff里面有数据，要和新数据整合起来
byte[] new_data = new byte[bytesRead + data_buff.Length];
Array.Copy(data_buff, new_data, data_buff.Length);
Array.Copy(receive_buff, 0, new_data, data_buff.Length, bytesRead);
data_buff = new_data;
}
}
// 继续监听下一波数据
tcpClient.GetStream().BeginRead(receive_buff, 0, tcpClient.ReceiveBufferSize, ReceiveMessage, null);
}
catch (Exception ex)
{
// 为了防止报ex没被使用的警告
Debug.Log(ex);
}
}
}
处理与Netty服务器通信的粘包、拆包
服务器的粘包拆包是Netty本身支持的解码编码器，如下图
服务器粘包、拆包处理方式
总共四行，其中第一行作用在拆包的时候，第三行作用在粘包的时候（我猜的）。
它这个拆包粘包不是普通的那种固定4个字节标示长度的，而是有时候1个字节，有时候是2、3、4、5个字节，根据当前发送的真实数据的长度定的。
在普通的方案粘包方案，数据是这样的：4个字节+真实数据
有的是用换行回车作为标识符拆包、粘包
那在Netty的方案里，包长度究竟是几个字节呢？
其实它也是用到了Protobuff里面的数据读取、保存方式，感兴趣的可以打开protobuf3-for-unity-3.0.0\src\Google.Protobuf.sln工程看一下，在Google.Protobuf项目中，打开CodedInputStream.cs：
SlowReadRawVarint32
包头占用几个字节是由下面这个函数计算的：
这个是计算一个uint数据的真实长度的方法
这也是protobuff对象编码后数据会比较小的主要原因。比如一个对象编码后得到的是440个字节数据，那么调用ComputeRawVarint32Size(440)的返回值是2，也就是服务器和客户端发送的数据最终长度是440+2=442个字节。明白了这些，拆包和粘包就都不是问题了。
上面的代码里，粘包是这一段：
public void SendMsg(IMessage message)
{
if (outputStream != null)
{
// WriteMessage 里面会先write一个长度，然后再write真实数据
outputStream.WriteMessage(message);
outputStream.Flush(); // 把buffer数据写入到tcpClient的流里面
}
}
乍一看，好像没有在真实数据前面加长度啊？其实，在outputStream的WriteMessage里面已经有WriteLength了，帮我们做好了。
image.png
再看拆包：
// 把数据传给CodedInputStream计算本次包的长度
CodedInputStream inputStream = new CodedInputStream(data_buff);
int length = inputStream.ReadLength();
// 计算"包长度"占用的字节数，后面取数据的时候扣掉这个字节数，就是真实数据长度
int lengthLength = CodedOutputStream.ComputeLengthSize(length);
// 当前数据足够解析一个包了
if (length + lengthLength <= data_buff.Length)
{
byte[] real_data = new byte[length];
// 拷贝真实数据
Array.Copy(data_buff, lengthLength, real_data, 0, length);
// 假设服务器给你发了个AddressBook
AddressBook ab = AddressBook.Parser.ParseFrom(real_data);
...
}
先用CodedInputStream 看看这个“包大小”值是多少，再用CodedOutputStream.ComputeLengthSize计算这个“包大小”占几个字节，然后就明白真实数据从哪里开始，占多少字节了。
自己写的消息注册和分发：
using Google.Protobuf;
using Google.Protobuf.WellKnownTypes;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Net.Sockets;
using UnityEngine;
using ARProto;
using pb = global::Google.Protobuf;
using System.Threading;
using System.Text;
using NIO;
public class ClientManager : MonoBehaviour
{
private static object lockObj = new object();
public static ClientManager instance;
public bool isEditIP;
public string IP = "106.2.124.243";
public int PORT = 9090;
public delegate void ResponMsgHandler(ServerMessage msg);
public delegate void BroadcastHandler(ServerMessage msg);
Queue<ServerMessage> QueueServerMessage = new Queue<ServerMessage>();
public event BroadcastHandler broadcastHandler;
private Dictionary<int, ResponMsgHandler> mDicMsgs = new Dictionary<int, ResponMsgHandler>();
private List<BroadcastHandler> BroadMsg = new List<BroadcastHandler>();
/// <summary>
/// 发送请求消息
/// </summary>
/// <param name="clientMessage">消息</param>
/// <param name="handler">被监听回调方法</param>
public void SendRequestMsg(ClientMessage clientMessage, ResponMsgHandler handler)
{
AddListener(clientMessage.Seq, handler);
SendMsg(clientMessage);
}
/// <summary>
/// 订阅广播消息 只需要注册一遍
/// </summary>
/// <param name="handler">被监听方法</param>
public void AddBroadcastListener(BroadcastHandler handler)
{
if (BroadMsg == null)
BroadMsg = new List<BroadcastHandler>();
if (BroadMsg.Contains(handler))
{
return;
}
else
{
BroadMsg.Add(handler);
broadcastHandler += handler;
}
}
/// <summary>
/// 取消对参数handler的监听
/// </summary>
/// <param name="msgType">消息类型</param>
/// <param name="handler">被监听方法</param>
public void RemoveListener(int msgType, ResponMsgHandler handler)
{
if (mDicMsgs != null && mDicMsgs.ContainsKey(msgType))
{
mDicMsgs[msgType] -= handler;
mDicMsgs.Remove(msgType);
}
}
private void AddListener(int msgType, ResponMsgHandler handler)
{
if (mDicMsgs == null)
mDicMsgs = new Dictionary<int, ResponMsgHandler>();
if (mDicMsgs.ContainsKey(msgType))
{
return;
}
else
{
mDicMsgs.Add(msgType, null);
mDicMsgs[msgType] += handler;
}
}
private void ClearAllListeners()
{
if (mDicMsgs != null)
mDicMsgs.Clear();
}
private void SendResponMsg(int msgType, ServerMessage msg)
{
ResponMsgHandler handler;
if (mDicMsgs != null && mDicMsgs.TryGetValue(msgType, out handler))
{
if (handler != null)
handler(msg);
}
}
private void SendBroadcastMsg(ServerMessage msg)
{
if (broadcastHandler != null)
broadcastHandler(msg);
}
void Awake()
{
instance = this;
}
Thread ThreadDoMessage;
bool isThreadDoMessageAbort;
void Start()
{
if (!isEditIP)
{
string str = Callback.UnityCheckEnvironment();
Debug.Log("UnityCheckEnvironment str:" + str);
if (str.Equals("dev") || str.Equals("test"))
{
IP = "106.2.124.243";
PORT = 29090;
}
if (str.Equals("online"))
{
IP = "106.2.124.243";
PORT = 9090;
}
}
StartConnect(IP, PORT);
ThreadDoMessage = new Thread(new ThreadStart(DoMessage));
//ThreadDoMessage.IsBackground = true;
//ThreadDoMessage.Priority = System.Threading.ThreadPriority.Normal;
ThreadDoMessage.Start();
isThreadDoMessageAbort = true;
InvokeRepeating("SendRepeat", 0, 2);
}
TcpClient tcpClient;
byte[] receive_buff;
byte[] data_buff;
byte[] data_buff2;
CodedOutputStream outputStream;
bool StartConnect(string IP, int PORT)
{
TcpClient client = new TcpClient();
tcpClient = client;
try
{
client.Connect(IP, PORT);
receive_buff = new byte[client.ReceiveBufferSize];
outputStream = new CodedOutputStream(client.GetStream());
client.GetStream().BeginRead(receive_buff, 0, client.ReceiveBufferSize, new AsyncCallback(ReceiveMessage), null);
}
catch (Exception e)
{
Debug.LogError("Connect Error:" + e);
}
isSuccess = client.Connected;
QueueServerMessage.Clear();
Debug.Log("StartConnect isSuccess:" + client.Connected);
heartTime = 0;
return isSuccess;
}
int heartTime = 0;
void SendRepeat()
{
SendMsg(PackMessage.PackClientHearMessage());
heartTime++;
// Debug.Log("SendMsg PackMessage.PackClientHearMessage:" + heartTime);
}
private bool SocketConnected()
{
try
{
return !tcpClient.Client.Poll(1, SelectMode.SelectRead) && (tcpClient.Client.Available == 0);
}
catch (SocketException)
{
return false;
}
catch (ObjectDisposedException)
{
return false;
}
}
void FixedUpdate()
{
if (!isSuccess)
{
Debug.Log("ReconnectUI");
ReconnectUI();
// return;
}
while (QueueServerMessage.Count > 0)
{
ServerMessageDo(QueueServerMessage.Dequeue());
}
}
void DoMessage()
{
Debug.Log("DoMessage 1");
while (true)
{
try
{
if (!isThreadDoMessageAbort)
{
Debug.Log("Exit DoMessage");
return;
}
// Debug.Log("DoMessage while (true)");
// if (((tcpClient.Client.Poll(1000, SelectMode.SelectRead) && (tcpClient.Client.Available == 0)) || !tcpClient.Client.Connected))
// {
// Debug.Log("tcpClient false");
// isSuccess = false;
// }
// isSuccess=SocketConnected();
lock (lockObj)
{
if (null != tcpClient && null != tcpClient.Client)
{
if (!tcpClient.Client.Connected || heartTime >= 2)
{
// Debug.Log("Update heartTime:" + heartTime);
isSuccess = false;
}
}
}
// if (!isSuccess)
// {
// Debug.Log("!isSuccess");
// // ReconnectUI();
// return;
// }
while (true)
{
if (data_buff != null)
{
lock (lockObj)
{
if (data_buff2 == null)
{
data_buff2 = new byte[data_buff.Length];
Array.Copy(data_buff, data_buff2, data_buff.Length);
}
else
{
byte[] temp = new byte[data_buff2.Length + data_buff.Length];
Array.Copy(data_buff2, temp, data_buff2.Length);
Array.Copy(data_buff, 0, temp, data_buff2.Length, data_buff.Length);
data_buff2 = temp;
}
data_buff = null;
}
}
else
{
break;
}
}
while (true)
{
if (data_buff2 != null)
{
CodedInputStream inputStream = new CodedInputStream(data_buff2);
int length = inputStream.ReadLength();
int lengthLength = CodedOutputStream.ComputeLengthSize(length);
if (length + lengthLength <= data_buff2.Length)
{
byte[] real_data = new byte[length];
Array.Copy(data_buff2, lengthLength, real_data, 0, length);
if (real_data.Length == 0)
{
Debug.LogError("real_data.Length==0");
}
ServerMessage sMsg = ServerMessage.Parser.ParseFrom(real_data);
// ServerMessageDo(sMsg);
QueueServerMessage.Enqueue(sMsg);
// Debug.Log("--ServerMessage:" + sMsg);
// Write.Log("--ServerMessage:" + sMsg);
if (length + lengthLength == data_buff2.Length)
{
data_buff2 = null;
}
else
{
byte[] temp = new byte[data_buff2.Length - length - lengthLength];
Array.Copy(data_buff2, lengthLength + length, temp, 0, temp.Length);
data_buff2 = temp;
}
}
else
{
break;
}
}
else
{
break;
}
}
}
catch (Exception exception)
{
Debug.Log("Socket exception: " + exception);
}
}
}
private void SendMsg(pb::IMessage message)
{
// Debug.Log("++SendMsg:" + message);
// Write.Log("++SendMsg:" + message);
if (!isSuccess)
{
Debug.Log("!isSuccess");
return;
}
try
{
if (outputStream != null)
{
outputStream.WriteMessage(message);
outputStream.Flush();
}
}
catch (Exception e)
{
Debug.LogError("SendMsg Exception:" + e);
isSuccess = false;
}
}
private void ServerMessageDo(ServerMessage sMsg)
{
if (sMsg == null)
{
Debug.LogError("ServerMessageDo sMsg==null");
return;
}
if (sMsg.MessageCategory == ServerMessageCategory.UndefinedServerMessageCategory)
{
Debug.LogError("sMsg.MessageCategory == ServerMessageCategory.UndefinedServerMessageCategory:" + sMsg);
return;
}
// Debug.Log("--sMsg:" + sMsg);
if (sMsg.MessageCategory == ServerMessageCategory.Broadcast)
{
// Debug.Log("Broadcast:" + sMsg);
// Write.Log("Broadcast:" + sMsg);
Broadcast broadcast = sMsg.Broadcast; // 广播
SendBroadcastMsg(sMsg);
}
else if (sMsg.MessageCategory == ServerMessageCategory.Response)
{
if (null == sMsg.Response)
{
Debug.LogError("ServerMessageDo null==sMsg.Response:" + sMsg);
return;
}
// 对客户端请求的响应
Response response = sMsg.Response;
// Debug.Log("response.Ack:" + response.Ack);
SendResponMsg(response.Ack, sMsg);
}
else if (sMsg.MessageCategory == ServerMessageCategory.ServerHeartbeat)
{
ServerHeartbeat serverHeartbeat = sMsg.ServerHeartbeat; // 服务端心跳
heartTime--;
// Debug.Log("PackClientHearMessage serverHeartbeat 心跳:" + heartTime);
}
}
private void ReceiveMessage(IAsyncResult ar)
{
// Debug.Log("receive_buff:" + receive_buff.Length);
try
{
// Debug.Log("ReceiveMessage id =" + Thread.CurrentThread.ManagedThreadId);
int bytesRead;
bytesRead = tcpClient.GetStream().EndRead(ar);
if (bytesRead < 1)
{
Debug.LogError("网络已断开 bytesRead < 1");
//TODO 重连
isSuccess = false;
return;
}
else
{
lock (lockObj)
{
if (data_buff == null)
{
data_buff = new byte[bytesRead];
Array.Copy(receive_buff, data_buff, bytesRead);
}
else
{
byte[] new_data = new byte[bytesRead + data_buff.Length];
Array.Copy(data_buff, new_data, data_buff.Length);
Array.Copy(receive_buff, 0, new_data, data_buff.Length, bytesRead);
data_buff = new_data;
}
// Debug.Log("ThreadId:" + Thread.CurrentThread.ManagedThreadId + "data_buff:" + data_buff.Length);
}
}
tcpClient.GetStream().BeginRead(receive_buff, 0, tcpClient.ReceiveBufferSize, new AsyncCallback(ReceiveMessage), null);
//string strbuff = Encoding.UTF8.GetString(receive_buff, 0, bytesRead);
// Debug.Log("bytesRead:" + bytesRead + "/" + receive_buff.Length + " receive_buff:" + strbuff);
// Write.Log("bytesRead:" + bytesRead + "/" + receive_buff.Length + " receive_buff:" + strbuff);
}
catch (Exception ex)
{
Debug.Log("ReceiveMessageException:" + ex);
}
}
// int reconnetTime = 0;
bool isSuccess = false;
public void ReconnectUI()
{
ARCarUIManager.Instance.ARNetPanel.SetActive(true);
}
public bool Reconnect()
{
Debug.Log("正在尝试重新连接网络...");
bool isok = StartConnect(IP, PORT);
ARCarUIManager.Instance.ARNetPanel.SetActive(false);
return isok;
}
// void Reconnect()
// {
// Debug.Log("Reconnect");
// if (!isSuccess)
// {
// tcpClient.Close();
// InvokeRepeating("InvokeReconnect", 0, 8);
// }
// }
// void InvokeReconnect()
// {
// reconnetTime++;
// Debug.LogError("正在尝试重新连接网络..." + reconnetTime);
// StartConnect(IP, PORT);
// if (isSuccess || reconnetTime >= 5)
// {
// CancelInvoke("InvokeReconnect");
// }
// }
public void OnDestroy()
{
try
{
tcpClient.GetStream().Close();
tcpClient.Close();
isSuccess = false;
ThreadDoMessage.Abort();
isThreadDoMessageAbort = false;
}
catch (Exception e)
{
Debug.Log(" tcpClient.Close e:" + e);
}
broadcastHandler = null;
mDicMsgs = null;
BroadMsg = null;
ClientManager.instance = null;
}
}
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