async Task <Result> ProcessAndResponse(
TcpClient tcpClient,
Action close_action,
ZServerChannel channel,
BerTree request,
CancellationToken token)
{
string name = "";
string ip = "";
bool error = false;
try
{
name = channel.GetDebugName(tcpClient);
ip = TcpServer.GetClientIP(tcpClient);
byte[] response = null;
if (this.ProcessRequest == null)
{
response = await DefaultProcessRequest(channel, request).ConfigureAwait(false); // 2018/10/10 add configure
}
else
{
ProcessRequestEventArgs e = new ProcessRequestEventArgs();
e.Request = request;
this.ProcessRequest(channel, e);
response = e.Response;
}
channel.Touch();
if (token != null && token.IsCancellationRequested)
{
error = true;
return(new Result {
Value = -1, ErrorInfo = "Cancelled"
});
}
// 注意调用返回 result.Value == -1 情况下，要及时 Close TcpClient
Result result = await ZProcessor.SendResponse(response, tcpClient).ConfigureAwait(false); // 2018/10/10 add configure
channel.Touch();
if (result.Value == -1)
{
Console.WriteLine("error on response " + name + ": " + result.ErrorInfo);
error = true;
return(result);
}
return(new Result());
}
catch (Exception ex)
{
if (ex is UnknownApduException ||
ex is BadApduException)
{
IpTable.SetInBlackList(ip, TimeSpan.FromHours(1));
LibraryManager.Log?.Info(string.Format("IP 地址 {0} 已被加入黑名单，时限一个小时", ip));
}
if (channel != null)
{
channel.Close();
if (close_action != null)
{
close_action.Invoke();
}
LogException(ex, channel, name);
channel = null;
}
else
{
LogException(ex, channel, name);
}
return(new Result {
Value = -1, ErrorInfo = "Cancelled"
});
}
finally
{
if (error == true &&
channel != null)
{
channel.Close();
if (close_action != null)
{
close_action.Invoke();
}
}
}
}
// Pipeline 版本
// 处理一个通道的通讯活动
public async override void HandleClient(TcpClient tcpClient,
Action close_action,
CancellationToken token)
{
List <byte> cache = new List <byte>();
ZServerChannel channel = _tcpChannels.Add(tcpClient, () => { return(new ZServerChannel()); }) as ZServerChannel;
// 允许对 channel 做额外的初始化
if (this.ChannelOpened != null)
{
this.ChannelOpened(channel, new EventArgs());
}
try
{
string name = "";
string ip = "";
Task <Result> task = null;
try
{
name = channel.GetDebugName(tcpClient);
ip = TcpServer.GetClientIP(tcpClient);
channel.Touch();
int i = 0;
bool running = true;
while (running)
{
if (token != null && token.IsCancellationRequested)
{
return;
}
// 注意调用返回后如果发现返回 null 或者抛出了异常，调主要主动 Close 和重新分配 TcpClient
BerTree request = await ZProcessor.GetIncomingRequest(
cache,
tcpClient,
() => channel.Touch()).ConfigureAwait(false); // 2018/10/10 add configure
if (request == null)
{
Console.WriteLine("client close on request " + i);
break;
}
Console.WriteLine("request " + i);
channel.Touch();
if (token != null && token.IsCancellationRequested)
{
return;
}
// 如果前一轮的任务还没有完成，这里等待
if (task != null)
{
Result result = task.Result;
if (result.Value == -1)
{
return;
}
task = null;
}
task = Task.Run(() =>
ProcessAndResponse(
tcpClient,
close_action,
channel,
request,
token));
i++;
}
}
catch (Exception ex)
{
#if NO
if (ex.InnerException != null && ex.InnerException is ObjectDisposedException)
{
// 这种情况一般是 server 主动清理闲置通道导致的，不记入日志
}
else if (ex is ObjectDisposedException)
{
// 这种情况一般是 client close 通道导致，不记入日志
}
#endif
#if NO
if (GetException(ex, typeof(ObjectDisposedException)) != null)
{
return;
}
SocketException socket_ex = (SocketException)GetException(ex, typeof(SocketException));
if (socket_ex != null && socket_ex.SocketErrorCode == SocketError.ConnectionReset)
{
return;
}
{
string strName = "ip:" + ip
+ channel == null ? "(null)" : " channel:" + channel.GetHashCode();
string strError = strName + " HandleClient() 异常: " + ExceptionUtil.GetExceptionText(ex);
LibraryManager.Log?.Error(strError);
// Console.WriteLine(strError);
}
#endif
if (ex is UnknownApduException ||
ex is BadApduException)
{
IpTable.SetInBlackList(ip, TimeSpan.FromHours(1));
LibraryManager.Log?.Info(string.Format("IP 地址 {0} 已被加入黑名单，时限一个小时", ip));
}
LogException(ex, channel, name);
}
finally
{
#if NO
outputStream.Flush();
outputStream.Close();
outputStream = null;
inputStream.Close();
inputStream = null;
#endif
// tcpClient.Close();
// 清除全局结果集
if (task != null)
{
// TODO: 要想办法立即终止检索和响应过程
}
}
}
finally
{
_tcpChannels.Remove(channel);
#if NO
if (this.ChannelClosed != null)
{
ChannelClosedEventArgs e = new ChannelClosedEventArgs();
e.Channel = channel;
this.ChannelClosed(channel, e);
}
#endif
channel.Close();
if (close_action != null)
{
close_action.Invoke();
}
}
}