/// <summary>
/// 关闭一个与客户端之间的会话
/// </summary>
/// <param name="state">需要关闭的客户端会话对象</param>
public void Close(AsyncSocketState state)
{
if (state != null)
{
state.Datagram = null;
state.RecvDataBuffer = null;
_clients.Remove(state);
_clientCount--;
//TODO 触发关闭事件
state.Close();
}
}
/// <summary>
/// 处理客户端数据
/// </summary>
/// <param name="ar"></param>
private void HandleDataReceived(IAsyncResult ar)
{
if (IsRunning)
{
AsyncSocketState state = (AsyncSocketState)ar.AsyncState;
Socket client = state.ClientSocket;
try
{
//如果两次开始了异步的接收,所以当客户端退出的时候
//会两次执行EndReceive
int recv = client.EndReceive(ar);
if (recv == 0)
{
//C- TODO 触发事件 (关闭客户端)
Close(state);
RaiseNetError(state);
return;
}
//TODO 处理已经读取的数据 ps:数据在state的RecvDataBuffer中
if (recv > 0)
{
var _bReceiveData = new byte[recv]; //存放已经接收返回的数据
Array.Copy(state.RecvDataBuffer, 0, _bReceiveData, 0, _bReceiveData.Length);
//C- TODO 触发数据接收事件
RaiseDataReceived(state, _bReceiveData);
}
}
catch (SocketException)
{
//C- TODO 异常处理
RaiseNetError(state);
}
finally
{
if (state.RecvDataBuffer != null)
{
//继续接收来自来客户端的数据
client.BeginReceive(state.RecvDataBuffer, 0, state.RecvDataBuffer.Length, SocketFlags.None,
new AsyncCallback(HandleDataReceived), state);
}
}
}
}
private void RaiseOtherException(AsyncSocketState state)
{
RaiseOtherException(state, "");
}
/// <summary>
/// 触发异常事件
/// </summary>
/// <param name="state"></param>
private void RaiseOtherException(AsyncSocketState state, string descrip)
{
OtherException?.Invoke(this, new AsyncSocketEventArgs(descrip, state));
}
/// <summary>
/// 触发网络错误事件
/// </summary>
/// <param name="state"></param>
private void RaiseNetError(AsyncSocketState state)
{
NetError?.Invoke(this, new AsyncSocketEventArgs(state));
}
/// <summary>
/// 触发数据发送完毕的事件
/// </summary>
/// <param name="state"></param>
private void RaiseCompletedSend(int num, AsyncSocketState state)
{
CompletedSend?.Invoke(this, new AsyncSocketEventArgs(num.ToString(), state));
}
/// <summary>
/// 触发发送数据前的事件
/// </summary>
/// <param name="state"></param>
private void RaisePrepareSend(AsyncSocketState state)
{
PrepareSend?.Invoke(this, new AsyncSocketEventArgs(state));
}
private void RaiseDataReceived(AsyncSocketState state, byte[] _bReceiveData)
{
DataReceived?.Invoke(_bReceiveData, new AsyncSocketEventArgs(state));
}
/// <summary>
/// 触发客户端连接事件
/// </summary>
/// <param name="state"></param>
private void RaiseClientConnected(AsyncSocketState state)
{
ClientConnected?.Invoke(this, new AsyncSocketEventArgs(state));
}
/// <summary>
/// 发送数据
/// </summary>
/// <param name="state">接收数据的客户端会话</param>
/// <param name="data">数据报文</param>
public void Send(AsyncSocketState state, byte[] data)
{
RaisePrepareSend(state);
Send(state.ClientSocket, data);
}
public AsyncSocketEventArgs(string msg, AsyncSocketState state)
{
this._msg = msg;
this._state = state;
IsHandled = false;
}
public AsyncSocketEventArgs(AsyncSocketState state)
{
this._state = state;
IsHandled = false;
}