socket传输protobuf字节流的实例介绍

上一篇讲到了数据的处理，这一篇主要讲使用多线程收发消息

//创建消息数据模型  2
//正式项目中，消息的结构一般是消息长度+消息id+消息主体内容  3 
public class Message  4
 {     
 public IExtensible protobuf;
 
  public int messageId;  7 }  8   9 public class SocketClientTemp : MonoBehaviour 10 { 11     
  const int packageMaxLength = 1024; 12  13     Socket mSocket; 14     Thread threadSend; 15     
  Thread threadRecive; 16     Queue<Message> allMessages = new Queue<Message>(); 17     
  Queue<byte[]> sendQueue = new Queue<byte[]>();
  public bool Init() 20     
  { 21         //创建一个socket对象 22        
   mSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 23         
   return SocketConnection("此处是ip", 1111); 24     } 25  26     void Update() 27     { 28        
   AnalysisMessage(); 29     } 30  31     /// <summary> 32     /// 建立服务器连接 33     /// </summary> 34     
   /// <param name="ip">服务器的ip地址</param> 35     /// <param name="port">端口</param> 36     
   bool SocketConnection(string ip, int port) 37     { 38         try 39         { 40             
   IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(ip), port); 41            
   //同步连接服务器，实际使用时推荐使用异步连接，处理方式会在下一篇讲断线重连时讲到 42            
   mSocket.Connect(ipep); 43             //连接成功后，创建两个线程，分别用于发送和接收消息 44            
   threadSend = new Thread(new ThreadStart(SendMessage)); 45             threadSend.Start(); 46            
   threadRecive = new Thread(new ThreadStart(ReceiveMessage)); 47             threadRecive.Start(); 48            
   return true; 49         } 50         catch (Exception e) 51         { 52            
   Debug.Log(e.ToString()); 53             Close(); 54             return false; 55       
    }      }
         #region ...发送消息 59     
 /// <summary> 60     /// 添加数据到发送队列 61     
 /// </summary> 62     /// <param name="protobufModel"></param> 63     
 /// <param name="messageId"></param> 64    
 public void AddSendMessageQueue(IExtensible protobufModel, int messageId) 65     
{ 66         sendQueue.Enqueue(BuildPackage(protobufModel, messageId)); 67     } 
void SendMessage() 70     { 71         //循环获取发送队列中第一个数据，然后发送到服务器 72         
 while (true) 73         { 74             if (sendQueue.Count == 0) 75             { 76                 
 Thread.Sleep(100); 77                 continue; 78             } 79             
if (!mSocket.Connected) 80             { 81                 Close(); 82                 
break; 83             } 84             
else 85                 Send(sendQueue.Peek());
//发送队列中第一条数据 86         } 87     } 88  89    
 void Send(byte[] bytes) 90     { 91         try 92         
 { 93             mSocket.Send(bytes, SocketFlags.None); 94             
 //发送成功后，从发送队列中移除已发送的消息 95             sendQueue.Dequeue(); 96         
 } 97         catch (SocketException e) 98         { 99             
 //如果错误码为10035，说明服务器缓存区满了，所以等100毫秒再次发送100             
 if (e.NativeErrorCode == 10035)101             {102                
 Thread.Sleep(100);103                 Send(bytes);104             
 }105             else106                 
 Debug.Log(e.ToString());107         }108     }109     #endregion110 111     
 #region ...接收消息112     /// <summary>113     /// 解析收到的消息114     
 /// </summary>115     void AnalysisMessage()116     {117         
 while (allMessages.Count > 0)118         {119             
 int id = allMessages.Dequeue().messageId;120             
 switch (id)121             {122                
 //根据消息id做不同的处理123             }124         }125     }126 127     
 /// <summary>128     /// 接收数据129     /// </summary>130     
 void ReceiveMessage()131     {132         while (true)133         
 {134             if (!mSocket.Connected)135                 
 break;136             byte[] recvBytesHead = GetBytesReceive(4);137             
 int bodyLength = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(recvBytesHead, 0));138             
 byte[] recvBytesBody = GetBytesReceive(bodyLength);139 140             
 byte[] messageId = new byte[4];141             
 Array.Copy(recvBytesBody, 0, messageId, 0, 4);142             
 byte[] messageBody = new byte[bodyLength - 4];143             
 Array.Copy(recvBytesBody, 4, messageBody, 0, bodyLength - 4);144 145             
 if (BitConverter.IsLittleEndian)146                 
 Array.Reverse(messageId);147             
 FillAllPackages(BitConverter.ToInt32(messageId, 0), messageBody);148         
 }    
 }
  /// <summary>152    
   /// 填充接收消息队列153     /// </summary>154     
   /// <param name="messageId"></param>155     /// <param name="messageBody"></param>156     void FillAllPackages(int messageId, byte[] messageBody)157     {158         switch (messageId)159         {160             //根据消息id处理消息，并添加到接收消息队列161             case 1:162                 allMessages.Enqueue(new Message() 
163                 
{164                     
protobuf = ProtobufSerilizer.DeSerialize<TestTemp>(messageBody), 
165                     
messageId = messageId 
166                 });167                
 break;168         }169     }170 171     
/// <summary>172     /// 接收数据并处理173     
/// </summary>174     /// <param name="length"></param>175     
/// <returns></returns>176     byte[] GetBytesReceive(int length)177     
{178         byte[] recvBytes = new byte[length];179         while (length > 0)180         
{181             
byte[] receiveBytes = new byte[length < packageMaxLength ? length : packageMaxLength];182             
int iBytesBody = 0;183             if (length >= receiveBytes.Length)184                 
iBytesBody = mSocket.Receive(receiveBytes, receiveBytes.Length, 0);185             
else186                 iBytesBody = mSocket.Receive(receiveBytes, length, 0);187             
receiveBytes.CopyTo(recvBytes, recvBytes.Length - length);188             length -= iBytesBody;189         
}190         return recvBytes;191     }192     #endregion193 194     /// <summary>195     /// 构建消息数据包196     
/// </summary>197     /// <param name="protobufModel"></param>198     /// <param name="messageId"></param>199     
byte[] BuildPackage(IExtensible protobufModel, int messageId)200     {201         byte[] b;202         
if (protobufModel != null)203             b = ProtobufSerilizer.Serialize(protobufModel);204         
else205             b = new byte[0];206         //消息长度(int数据，长度4) + 消息id(int数据，长度4) + 消息主体内容207         
ByteBuffer buf = ByteBuffer.Allocate(b.Length + 4 + 4);208         //消息长度 = 消息主体内容长度 + 消息id长度209         
buf.WriteInt(b.Length + 4);210         buf.WriteInt(messageId);211 212         if (protobufModel != null)213            
 buf.WriteBytes(b);214         return buf.GetBytes();215     }216 217     void OnDestroy()218     {219         
 //停止运行后，如果不关闭socket多线程，再次运行时，unity会卡死220         Close();221     }222 223     
 /// <summary>224     /// 关闭socket,终止线程225     /// </summary>226     public void Close()227     
 {228         if (mSocket != null)229         {230             
 //微软官方推荐在关闭socket前先shutdown，但是经过测试，发现网络断开后，shutdown会无法执行231             
 if (mSocket.Connected)232                 mSocket.Shutdown(SocketShutdown.Both);233             
 mSocket.Close();234             mSocket = null;235         }236         //关闭线程237         
 if (threadSend != null)238             threadSend.Abort();239         if (threadRecive != null)240            
 threadRecive.Abort();241         threadSend = null;242         threadRecive = null;243     }244 }

到这里，使用socket处理消息的收发就基本结束了，但是，某些项目为了增强体验，可能还会增加断线重连的功能，这个功能会在下一篇讲到

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