/// <summary>
/// 开始异步接收，同时处理传入的事件参数，里面可能有接收到的数据
/// </summary>
/// <param name="e"></param>
internal new void ReceiveAsync(DME_NetEventArgs e)
{
if (e.BytesTransferred > 0)
OnReceive(e);
else
base.ReceiveAsync(e);
}
void server_Accepted(object sender, DME_NetEventArgs e)
{
DME_TcpClient session = e.UserToken as DME_TcpClient;
if (session == null) return;
//session.NoDelay = false;
SetEvent(session);
}
/// <summary>
/// 接受连接时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected virtual void OnAccepted(Object sender, DME_NetEventArgs e)
{
DME_TcpClient session = e.UserToken as DME_TcpClient;
if (session == null) return;
session.Received += OnReceived;
session.Error += new EventHandler<DME_NetEventArgs>(OnError);
}
/// <summary>
/// 异步接收
/// </summary>
/// <param name="e"></param>
protected override void ReceiveAsync(DME_NetEventArgs e)
{
if (!Client.IsBound) Bind();
// 如果没有传入网络事件参数，从对象池借用
if (e == null) e = Pop();
e.RemoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
if (!Client.ReceiveFromAsync(e)) RaiseCompleteAsync(e);
}
/// <summary>
/// 接收数据。已重载。接收到0字节表示连接断开！
/// </summary>
/// <param name="e"></param>
protected override void OnReceive(DME_NetEventArgs e)
{
if (e.BytesTransferred > 0)
base.OnReceive(e);
else
{
//// 关闭前回收
//Push(e);
//Close();
OnError(e, null);
}
}
/// <summary>
/// 已重载。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected override void OnReceived(object sender, DME_NetEventArgs e)
{
if (e.BytesTransferred > 1024)
{
WriteLog("{0}的数据包大于1k，抛弃！", e.RemoteEndPoint);
return;
}
//WriteLog("{0} {1}", e.RemoteEndPoint, Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred));
WriteLog("{0} [{1}] {2}", e.RemoteEndPoint, e.BytesTransferred, e.GetString());
if ((e.RemoteEndPoint as IPEndPoint).Address != IPAddress.Any)
{
DME_UdpServer us = sender as DME_UdpServer;
us.Send(e.Buffer, e.Offset, e.BytesTransferred, e.RemoteEndPoint);
// 这里发送完成后不需要关闭Socket，因为这是UdpServer的Socket
}
}
/// <summary>
/// 已重载。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected override void OnReceived(object sender, DME_NetEventArgs e)
{
DME_TcpClient tc = sender as DME_TcpClient;
try
{
if (e.BytesTransferred > 1024)
{
WriteLog("{0}的数据包大于1k，抛弃！", tc.RemoteEndPoint);
}
else
{
WriteLog("{0} [{1}] {2}", tc.RemoteEndPoint, e.BytesTransferred, e.GetString());
if (tc != null && tc.Client.Connected) tc.Send(e.Buffer, e.Offset, e.BytesTransferred);
}
}
finally
{
tc.Close();
}
}
/// <summary>
/// 创建会话
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
protected virtual DME_TcpSession CreateSession(DME_NetEventArgs e)
{
DME_TcpSession session = new DME_TcpSession();
session.Socket = e.AcceptSocket;
session.RemoteEndPoint = e.AcceptSocket.RemoteEndPoint as IPEndPoint;
Sessions.Add(session);
return session;
}
/// <summary>
/// 已重载。
/// </summary>
/// <param name="e"></param>
protected override void OnComplete(DME_NetEventArgs e)
{
switch (e.LastOperation)
{
case SocketAsyncOperation.Accept:
break;
case SocketAsyncOperation.Connect:
break;
case SocketAsyncOperation.Disconnect:
break;
case SocketAsyncOperation.None:
break;
case SocketAsyncOperation.Receive:
case SocketAsyncOperation.ReceiveFrom:
case SocketAsyncOperation.ReceiveMessageFrom:
OnReceive(e);
return;
case SocketAsyncOperation.Send:
break;
case SocketAsyncOperation.SendPackets:
break;
case SocketAsyncOperation.SendTo:
break;
default:
break;
}
base.OnComplete(e);
}
/// <summary>
/// 在线程池里面执行指定委托。内部会处理异常并调用OnError
/// </summary>
/// <param name="callback"></param>
/// <param name="e"></param>
protected void ThreadPoolCallback(Action<DME_NetEventArgs> callback, DME_NetEventArgs e)
{
if (UseThreadPool)
{
ThreadPool.QueueUserWorkItem(delegate(Object state)
{
try
{
callback(state as DME_NetEventArgs);
}
catch (Exception ex)
{
try
{
OnError(state as DME_NetEventArgs, ex);
}
catch { }
// 都是在线程池线程里面了，不要往外抛出异常
//throw;
}
}, e);
}
else
{
callback(e);
}
}
/// <summary>
/// 新客户端到达
/// </summary>
/// <param name="e"></param>
protected virtual void OnAccept(DME_NetEventArgs e)
{
// 再次开始
if (e.SocketError != SocketError.OperationAborted) StartAccept();
// Socket错误由各个处理器来处理
if (e.SocketError != SocketError.Success)
{
OnError(e, null);
return;
}
// 建立会话
DME_TcpSession session = CreateSession(e);
session.NoDelay = this.NoDelay;
e.UserToken = session;
if (Accepted != null) Accepted(this, e);
if (session.Socket != null && session.Socket.Connected) session.ReceiveAsync(e);
}
/// <summary>
/// 收到数据时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected virtual void OnReceived(Object sender, DME_NetEventArgs e)
{
}
/// <summary>
/// 异步触发完成事件处理程序
/// </summary>
/// <param name="e"></param>
protected void RaiseCompleteAsync(DME_NetEventArgs e)
{
if (UseThreadPool)
{
ThreadPool.QueueUserWorkItem(delegate(Object state)
{
RaiseComplete(state as DME_NetEventArgs);
}, e);
}
else
{
RaiseComplete(e);
}
}
/// <summary>
/// 错误发生时。负责调用Error事件以及回收网络事件参数
/// </summary>
/// <remarks>OnError除了会调用ProcessError外，还会关闭Socket</remarks>
/// <param name="e"></param>
/// <param name="ex"></param>
protected virtual void OnError(DME_NetEventArgs e, Exception ex)
{
try
{
ProcessError(e, ex);
}
finally
{
Close();
}
}
/// <summary>
/// 处理接收
/// </summary>
/// <param name="e"></param>
private void ProcessReceive(DME_NetEventArgs e)
{
if (NoDelay) ReceiveAsync();
if (Received != null) Received(this, e);
if (NoDelay)
Push(e);
else
ReceiveAsync(e);
}
/// <summary>
/// 把对象归还到池里
/// </summary>
/// <remarks>
/// 网络事件参数使用原则：
/// 1，得到者负责回收（通过方法参数得到）
/// 2，正常执行时自己负责回收，异常时顶级负责回收
/// 3，把回收责任交给别的方法
/// </remarks>
/// <param name="e"></param>
public void Push(DME_NetEventArgs e)
{
if (e == null) return;
if (!e.Used) throw new Exception("准备回炉，怎么可能已经不再使用呢？");
e.UserToken = null;
e.AcceptSocket = null;
e.Completed -= OnCompleted;
e.Used = false;
Pool.Push(e);
}
/// <summary>
/// 接收到数据时
/// </summary>
/// <param name="e"></param>
protected virtual void OnReceive(DME_NetEventArgs e)
{
// Socket错误由各个处理器来处理
if (e.SocketError == SocketError.OperationAborted)
{
OnError(e, null);
return;
}
// 没有接收事件时，马上开始处理重建委托
if (Received == null)
{
ReceiveAsync(e);
return;
}
//ProcessReceive(e);
// 这里可以改造为使用多线程处理事件
ThreadPoolCallback(ProcessReceive, e);
}
/// <summary>
/// 断开连接/发生错误
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected virtual void OnError(object sender, DME_NetEventArgs e)
{
if (e.SocketError != SocketError.Success || e.UserToken is Exception)
WriteLog("{2}错误 {0} {1}", e.SocketError, e.UserToken as Exception, e.LastOperation);
else
WriteLog("{0}断开！", e.LastOperation);
}
/// <summary>
/// 已重载。服务器不会因为普通错误而关闭Socket停止服务
/// </summary>
/// <param name="e"></param>
/// <param name="ex"></param>
protected override void OnError(DME_NetEventArgs e, Exception ex)
{
//base.OnError(e, ex);
try
{
ProcessError(e, ex);
}
finally
{
if (e.SocketError == SocketError.OperationAborted) Close();
}
}
/// <summary>
/// 已重载。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected override void OnReceived(object sender, DME_NetEventArgs e)
{
if (e.BytesTransferred > 0) DME_StreamHandlerFactory.Process(StreamHandlerFactoryName, e.GetStream());
}
/// <summary>
/// 接收到数据时
/// </summary>
/// <remarks>
/// 网络事件参数使用原则：
/// 1，得到者负责回收（通过方法参数得到）
/// 2，正常执行时自己负责回收，异常时顶级负责回收
/// 3，把回收责任交给别的方法
/// </remarks>
/// <param name="e"></param>
protected virtual void OnReceive(DME_NetEventArgs e)
{
// Socket错误由各个处理器来处理
if (e.SocketError != SocketError.Success)
{
OnError(e, null);
return;
}
// 没有接收事件时，马上开始处理重建委托
if (Received == null)
{
// 3，把回收责任交给别的方法
ReceiveAsync(e);
return;
}
//ProcessReceive(e);
// 这里可以改造为使用多线程处理事件
// 3，把回收责任交给别的方法
ThreadPoolCallback(ProcessReceive, e);
}
/// <summary>
/// 错误发生/断开连接时。拦截Error事件中的所有异常，不外抛，防止因为Error异常导致多次调用OnError
/// </summary>
/// <param name="e"></param>
/// <param name="ex"></param>
protected void ProcessError(DME_NetEventArgs e, Exception ex)
{
if (Error != null)
{
if (ex != null)
{
if (e == null) e = Pop();
e.UserToken = ex;
}
try
{
Error(this, e);
}
catch (Exception ex2)
{
WriteLog(ex2.ToString());
}
}
// 不管有没有外部事件，都要归还网络事件参数，那是对象池的东西，不是你的
if (e != null) Push(e);
}
/// <summary>
/// 开始异步接收数据
/// </summary>
/// <param name="e"></param>
protected virtual void ReceiveAsync(DME_NetEventArgs e)
{
if (!Client.IsBound) Bind();
// 如果没有传入网络事件参数，从对象池借用
if (e == null) e = Pop();
if (!Client.ReceiveAsync(e)) RaiseCompleteAsync(e);
}
/// <summary>
/// 触发完成事件。
/// 可能由工作线程（事件触发）调用，也可能由用户线程通过线程池线程调用。
/// 作为顶级，将会处理所有异常并调用OnError，其中OnError有能力回收参数e。
/// </summary>
/// <param name="e"></param>
protected void RaiseComplete(DME_NetEventArgs e)
{
try
{
if (Completed != null) Completed(this, e);
OnComplete(e);
// 这里可以改造为使用多线程处理事件
//ThreadPoolCallback(OnCompleted, e);
}
catch (Exception ex)
{
OnError(e, ex);
// 都是在线程池线程里面了，不要往外抛出异常
//throw;
}
}
/// <summary>
/// 完成事件分发中心。
/// 正常执行时OnComplete必须保证回收参数e，异常时RaiseComplete将能够代为回收
/// </summary>
/// <param name="e"></param>
protected virtual void OnComplete(DME_NetEventArgs e)
{
}
/// <summary>
/// 处理接收
/// </summary>
/// <param name="e"></param>
private void ProcessReceive(DME_NetEventArgs e)
{
if (NoDelay && e.SocketError != SocketError.OperationAborted) ReceiveAsync();
try
{
// Socket错误由各个处理器来处理
if (e.SocketError != SocketError.Success)
{
OnError(e, null);
// OnError里面已经被回收，赋值为null，否则后面finally里面的Push会出错
e = null;
return;
}
if (Received != null) Received(this, e);
}
finally
{
if (NoDelay)
Push(e);
else
ReceiveAsync(e);
}
}
