/// <summary>
/// 协议第一个字节是协议标识，因此在接收到第一个字节的时候需要绑定协议解析对象
/// </summary>
/// <param name="userToken"></param>
private void BuildingSocketInvokeElement(AsyncSocketUserToken userToken)
{
byte flag = userToken.ReceiveEventArgs.Buffer[userToken.ReceiveEventArgs.Offset];
if (flag == (byte)ProtocolFlag.Upload)
{
userToken.AsyncSocketInvokeElement = new UploadSocketProtocol(this, userToken);
}
else if (flag == (byte)ProtocolFlag.Download)
{
userToken.AsyncSocketInvokeElement = new DownloadSocketProtocol(this, userToken);
}
else if (flag == (byte)ProtocolFlag.RemoteStream)
{
userToken.AsyncSocketInvokeElement = new RemoteStreamSocketProtocol(this, userToken);
}
else if (flag == (byte)ProtocolFlag.Throughput)
{
userToken.AsyncSocketInvokeElement = new ThroughputSocketProtocol(this, userToken);
}
else if (flag == (byte)ProtocolFlag.Control)
{
userToken.AsyncSocketInvokeElement = new ControlSocketProtocol(this, userToken);
}
else if (flag == (byte)ProtocolFlag.LogOutput)
{
userToken.AsyncSocketInvokeElement = new LogOutputSocketProtocol(this, userToken);
}
if (userToken.AsyncSocketInvokeElement != null)
{
Program.Logger.InfoFormat("Building socket invoke element {0}.Local Address: {1}, Remote Address: {2}",
userToken.AsyncSocketInvokeElement, userToken.ConnectSocket.LocalEndPoint, userToken.ConnectSocket.RemoteEndPoint);
}
}
public BaseSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_userName = "";
m_logined = false;
m_socketFlag = "";
}
public void Add(AsyncSocketUserToken userToken)
{
lock (m_list)
{
m_list.Add(userToken);
}
}
public void Remove(AsyncSocketUserToken userToken)
{
lock (m_list)
{
m_list.Remove(userToken);
}
}
/// <summary>
/// 当一个SocketAsyncEventArgs断开后，我们需要断开对应的Socket连接，并释放对应资源
/// </summary>
/// <param name="userToken"></param>
public void CloseClientSocket(AsyncSocketUserToken userToken)
{
if (userToken.ConnectSocket == null)
{
return;
}
string socketInfo = string.Format("Local Address: {0} Remote Address: {1}", userToken.ConnectSocket.LocalEndPoint,
userToken.ConnectSocket.RemoteEndPoint);
Program.Logger.InfoFormat("Client connection disconnected. {0}", socketInfo);
try
{
userToken.ConnectSocket.Shutdown(SocketShutdown.Both);
}
catch (Exception E)
{
Program.Logger.ErrorFormat("CloseClientSocket Disconnect client {0} error, message: {1}", socketInfo, E.Message);
}
userToken.ConnectSocket.Close();
userToken.ConnectSocket = null; //释放引用，并清理缓存，包括释放协议对象等资源
m_maxNumberAcceptedClients.Release();
m_asyncSocketUserTokenPool.Push(userToken);
m_asyncSocketUserTokenList.Remove(userToken);
}
/// <summary>
/// NET底层IO线程也是每个异步事件都是由不同的线程返回到Completed事件，
/// 因此在Completed事件需要对用户对象进行加锁，
/// 避免同一个用户对象同时触发两个Completed事件。
/// </summary>
/// <param name="sender"></param>
/// <param name="asyncEventArgs"></param>
void IO_Completed(object sender, SocketAsyncEventArgs asyncEventArgs)
{
AsyncSocketUserToken userToken = asyncEventArgs.UserToken as AsyncSocketUserToken;
userToken.ActiveDateTime = DateTime.Now;
try
{
lock (userToken)
{//避免同一个userToken同时有多个线程操作
if (asyncEventArgs.LastOperation == SocketAsyncOperation.Receive)
{
ProcessReceive(asyncEventArgs);
}
else if (asyncEventArgs.LastOperation == SocketAsyncOperation.Send)
{
ProcessSend(asyncEventArgs);
}
else
{
throw new ArgumentException("The last operation completed on the socket was not a receive or send");
}
}
}
catch (Exception E)
{
Program.Logger.ErrorFormat("IO_Completed {0} error, message: {1}", userToken.ConnectSocket, E.Message);
Program.Logger.Error(E.StackTrace);
}
}
private void ProcessAccept(SocketAsyncEventArgs acceptEventArgs)
{
Program.Logger.InfoFormat("Client connection accepted. Local Address: {0}, Remote Address: {1}",
acceptEventArgs.AcceptSocket.LocalEndPoint, acceptEventArgs.AcceptSocket.RemoteEndPoint);
AsyncSocketUserToken userToken = m_asyncSocketUserTokenPool.Pop();
m_asyncSocketUserTokenList.Add(userToken); //添加到正在连接列表
userToken.ConnectSocket = acceptEventArgs.AcceptSocket;
userToken.ConnectDateTime = DateTime.Now;
try
{
bool willRaiseEvent = userToken.ConnectSocket.ReceiveAsync(userToken.ReceiveEventArgs); //投递接收请求
if (!willRaiseEvent)
{
lock (userToken)
{
ProcessReceive(userToken.ReceiveEventArgs);
}
}
}
catch (Exception E)
{
Program.Logger.ErrorFormat("Accept client {0} error, message: {1}", userToken.ConnectSocket, E.Message);
Program.Logger.Error(E.StackTrace);
}
StartAccept(acceptEventArgs); //把当前异步事件释放，等待下次连接
}
public void CopyList(ref AsyncSocketUserToken[] array)
{
lock (m_list)
{
array = new AsyncSocketUserToken[m_list.Count];
m_list.CopyTo(array);
}
}
/// <summary>
/// 接收事件响应函数,接收的逻辑
/// </summary>
/// <param name="receiveEventArgs"></param>
private void ProcessReceive(SocketAsyncEventArgs receiveEventArgs)
{
AsyncSocketUserToken userToken = receiveEventArgs.UserToken as AsyncSocketUserToken;
if (userToken.ConnectSocket == null)
{
return;
}
userToken.ActiveDateTime = DateTime.Now;
if (userToken.ReceiveEventArgs.BytesTransferred > 0 && userToken.ReceiveEventArgs.SocketError == SocketError.Success)
{
int offset = userToken.ReceiveEventArgs.Offset;
int count = userToken.ReceiveEventArgs.BytesTransferred;
if ((userToken.AsyncSocketInvokeElement == null) & (userToken.ConnectSocket != null)) //存在Socket对象，并且没有绑定协议对象，则进行协议对象绑定
{
BuildingSocketInvokeElement(userToken);
offset = offset + 1;
count = count - 1;
}
if (userToken.AsyncSocketInvokeElement == null) //如果没有解析对象，提示非法连接并关闭连接
{
Program.Logger.WarnFormat("Illegal client connection. Local Address: {0}, Remote Address: {1}", userToken.ConnectSocket.LocalEndPoint,
userToken.ConnectSocket.RemoteEndPoint);
CloseClientSocket(userToken);
}
else
{
if (count > 0) //处理接收数据
{
if (!userToken.AsyncSocketInvokeElement.ProcessReceive(userToken.ReceiveEventArgs.Buffer, offset, count))
{ //如果处理数据返回失败，则断开连接
CloseClientSocket(userToken);
}
else //否则投递下次介绍数据请求
{
bool willRaiseEvent = userToken.ConnectSocket.ReceiveAsync(userToken.ReceiveEventArgs); //投递接收请求
if (!willRaiseEvent)
{
ProcessReceive(userToken.ReceiveEventArgs);
}
}
}
else
{
bool willRaiseEvent = userToken.ConnectSocket.ReceiveAsync(userToken.ReceiveEventArgs); //投递接收请求
if (!willRaiseEvent)
{
ProcessReceive(userToken.ReceiveEventArgs);
}
}
}
}
else
{
CloseClientSocket(userToken);
}
}
public UploadSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_socketFlag = "Upload";
m_fileName = "";
m_fileStream = null;
lock (m_asyncSocketServer.UploadSocketProtocolMgr)
{
m_asyncSocketServer.UploadSocketProtocolMgr.Add(this);
}
}
/// <summary>
///
/// </summary>
/// <param name="item"></param>
public void Push(AsyncSocketUserToken item)
{
if (item == null)
{
throw new ArgumentException("Items added to a AsyncSocketUserToken cannot be null");
}
lock (m_pool)
{//对m_asyncSocketUserTokenPool和m_asyncSocketUserTokenList进行处理的时候都有加锁
m_pool.Push(item);
}
}
public LogOutputSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_socketFlag = "LogOutput";
m_logFixedBuffer = new LogFixedBuffer();
lock (Program.AsyncSocketSvr.LogOutputSocketProtocolMgr)
{
Program.AsyncSocketSvr.LogOutputSocketProtocolMgr.Add(this);
}
SendResponse();
}
/// <summary>
/// 按照连接数建立读写对象
/// </summary>
public void Init()
{
AsyncSocketUserToken userToken;
for (int i = 0; i < m_numConnections; i++)
{
userToken = new AsyncSocketUserToken(m_receiveBufferSize);
userToken.ReceiveEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
userToken.SendEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
m_asyncSocketUserTokenPool.Push(userToken);
}
}
public DownloadSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_socketFlag = "Download";
m_fileName = "";
m_fileStream = null;
m_sendFile = false;
m_packetSize = 64 * 1024;
lock (m_asyncSocketServer.DownloadSocketProtocolMgr)
{
m_asyncSocketServer.DownloadSocketProtocolMgr.Add(this);
}
}
public AsyncSocketInvokeElement(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
{
m_asyncSocketServer = asyncSocketServer;
m_asyncSocketUserToken = asyncSocketUserToken;
m_netByteOrder = false;
m_incomingDataParser = new IncomingDataParser();
m_outgoingDataAssembler = new OutgoingDataAssembler();
m_sendAsync = false;
m_connectDT = DateTime.UtcNow;
m_activeDT = DateTime.UtcNow;
}
/// <summary>
/// 发送事件响应函数,发送的逻辑,把发送数据放到一个列表中，当上一个发送事件完成响应Completed事件，
/// 这时我们需要检测发送队列中是否存在未发送的数据，如果存在则继续发送
/// </summary>
/// <param name="sendEventArgs"></param>
/// <returns></returns>
private bool ProcessSend(SocketAsyncEventArgs sendEventArgs)
{
AsyncSocketUserToken userToken = sendEventArgs.UserToken as AsyncSocketUserToken;
if (userToken.AsyncSocketInvokeElement == null)
{
return(false);
}
userToken.ActiveDateTime = DateTime.Now;
if (sendEventArgs.SocketError == SocketError.Success)
{
return(userToken.AsyncSocketInvokeElement.SendCompleted()); //调用子类回调函数
}
else
{
CloseClientSocket(userToken);
return(false);
}
}
public ControlSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_socketFlag = "Control";
}
public ThroughputSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_socketFlag = "Throughput";
}
public RemoteStreamSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
: base(asyncSocketServer, asyncSocketUserToken)
{
m_socketFlag = "RemoteStream";
m_fileStream = null;
}
