void asynService_OnSendErrorHandler(NetServiceErrorReason reason)
{
LogManger.Error(reason,this.GetType());
if (SendMessageError != null)
{
SendMessageError(reason);
}
}
/// <summary>
/// 发包失败事件
/// </summary>
/// <param name="reason"></param>
private void SendErrorHandler(NetServiceErrorReason reason)
{
SendErrorHandler handler = OnSendErrorHandler;
if (handler != null) handler(reason);
}
/// <summary>
///
/// </summary>
/// <param name="reason"></param>
private void ReceiveErrorHandler(NetServiceErrorReason reason)
{
ReceiveErrorHandler handler = OnReceiveErrorHandler;
if (handler != null) handler(reason);
}
/// <summary>
/// 写入网络流异步回调函数
/// </summary>
/// <param name="result"></param>
private void AsyncCallbackWriteToNetStream(IAsyncResult result)
{
WriteNetStreamASyncCallbackParam p = (WriteNetStreamASyncCallbackParam)result.AsyncState;
try
{
p.NetStream.EndWrite(result);
}
catch (Exception e)
{
NetServiceErrorReason reason = new NetServiceErrorReason();
reason.Exception = e.InnerException ?? e;
reason.SendData = p.Packet.Command.Data;
this.SendErrorHandler(reason);
LogManger.Warn(e, this.GetType());
p.NetStream.Close();
return;
}
if (OnAfterSendPacket != null)
OnAfterSendPacket(p.Packet.PacketHead);
}
/// <summary>
/// 从网络流异步读取数据回调函数
/// </summary>
/// <param name="result"></param>
private void AsyncCallbackReadFromNetStream(IAsyncResult result)
{
int readLen;
try
{
NetworkStream netStream = (NetworkStream)result.AsyncState;
readLen = netStream.EndRead(result);
//判断读取的字节数+缓冲区已有字节数是否超过缓冲区总大小
if (readLen + _netDataOffset > _netDataBuffer.Length)
{
if (IsFullNetPacketHead())//如果缓冲区数据满足一个包头数据大小,则可以计算出本次接收的包需要的缓冲区大小,从而实现一次调整大小
{
Array.Resize<Byte>(ref _netDataBuffer, FullNetPacketSize);
}
else //不满足一个完整的网络封包的大小
{
Array.Resize<Byte>(ref _netDataBuffer, _netDataBuffer.Length + BUFFER_SIZE * 2);
}
}
if (_netDataBuffer.Length < _netDataOffset + readLen) // 特殊处理
{
Array.Resize<Byte>(ref _netDataBuffer, _netDataBuffer.Length + BUFFER_SIZE);
}
//将新读取的数据拷贝到缓冲区
Array.Copy(_tempBuffer, 0, _netDataBuffer, _netDataOffset, readLen);
//修改"网络数据实际长度"
_netDataOffset += readLen;
//PickMessage();
}
catch (Exception e)
{
NetServiceErrorReason reason = new NetServiceErrorReason();
reason.Exception = e.InnerException ?? e;
this.ReceiveErrorHandler(reason);
}
finally
{
PickMessage();
}
}
/// <summary>
/// 发包
/// </summary>
/// <param name="packet"></param>
public override void SendMessage(NetPacket packet)
{
if (packet == null || packet.Command == null || packet.PacketHead == null)
return;
if (OnBeforeSendPacket != null)
OnBeforeSendPacket(packet);
MemoryStream mStream = new MemoryStream();
try
{
#region【计算包体长度】
if (packet.PacketHead.Len == 0)
{
packet.PacketHead.Len = GetCanSerializableObjectSize(packet.Command);
}
#endregion
#region【写入包头】
mStream.Write(BitConverter.GetBytes(packet.PacketHead.Version), 0, Marshal.SizeOf(packet.PacketHead.Version));
mStream.Write(BitConverter.GetBytes((Int32)packet.PacketHead.PType), 0, sizeof(Int32));
mStream.Write(BitConverter.GetBytes(packet.PacketHead.Len), 0, Marshal.SizeOf(packet.PacketHead.Len));
#endregion
#region【写入包体】
byte[] buffer = null;
using (MemoryStream m = new MemoryStream())
{
SerializeHelper<BinarySerializeHelper>().Serialize(m, packet.Command);
m.Position = 0;
buffer = new byte[m.Length];
m.Read(buffer, 0, (Int32)m.Length);
}
mStream.Write(buffer, 0, buffer.Length);
#endregion
#region【将内存流一次写入网络流,异步写入】
mStream.Seek(0, SeekOrigin.Begin);
_netStream.BeginWrite(mStream.GetBuffer(), 0, (Int32)mStream.Length, new AsyncCallback(AsyncCallbackWriteToNetStream), new WriteNetStreamASyncCallbackParam { NetStream = _netStream, Packet = packet });
#endregion
}
catch (Exception e)
{
NetServiceErrorReason reason = new NetServiceErrorReason();
reason.Exception = e.InnerException ?? e;
reason.SendData = packet.Command.Data;
this.SendErrorHandler(reason);
}
mStream.Close();
}
/// <summary>
/// 该方法的返回值总是为空.提取一个完整网络包然后返回,返回的封包需要通过注册OnReceivedPacket事件的函数获取
/// </summary>
/// <returns></returns>
public override NetPacket PickMessage()
{
try
{
//判断是否满足一个完整封包大小
if (IsFullNetPacket())//如果有完整封包就返回
{
NetPacket packet = PickNetPacket();
if (OnReceivedPacket != null) //判断事件是否注册,如果注册调用回调函数传递收到的封包
{
OnReceivedPacket(packet);
}
//return null;//提取到一个封包后应该及时返回
}
if (_netStream.CanRead)
{
//【缓冲区不满足一个完整封包大小则继续从网络流读取数据,异步读取】
_netStream.BeginRead(_tempBuffer, 0, BUFFER_SIZE, new AsyncCallback(AsyncCallbackReadFromNetStream), _netStream);
}
return null;
}
catch (Exception e)
{
NetServiceErrorReason reason = new NetServiceErrorReason();
reason.Exception = e.InnerException ?? e;
this.ReceiveErrorHandler(reason);
return null;
}
}
void _subscriber_OnReceiveErrorHandler(NetServiceErrorReason reason)
{
if (_subscriber.IsClientConnected == false)
{
_subscriber.ReConnectServer();
_subscriber.Subscribe(this.txtTopicName.Text);
}
if (this._showErrorMsgCount < 3) // 只提示三次
{
MessageBox.Show(string.Format("订阅者接受数据失败:{0}", reason.Message));
}
_showErrorMsgCount++;
}
/// <summary>
/// 发包服务失败
/// </summary>
/// <param name="reason"></param>
void _product_OnSendErrorHandler(NetServiceErrorReason reason)
{
MessageBox.Show(string.Format("发包失败:{0}", reason.Message));
}