static int DEFAULT_CLEAR_SECONDS = 10; // TCP 连接后，登录以前，能存活的秒数。超过这个秒数就可能被管理线程 Close 和清除
// 处理一个通道的通讯活动
public async override void HandleClient(TcpClient tcpClient,
Action close_action,
CancellationToken token)
{
SipChannel channel = _tcpChannels.Add(tcpClient, () => { return(new SipChannel()); }) as SipChannel;
channel.Timeout = TimeSpan.FromSeconds(DEFAULT_CLEAR_SECONDS); // 在登录以前，TCP 连接可以存活 DEFAULT_CLEAR_SECONDS 秒。DEFAULT_CLEAR_SECONDS 秒以后还不接到登录请求，TCP 连接会被自动清除。登录后，Timeout 则会被设置为实例参数 AutoClearSeconds 值
List <byte> cache = new List <byte>();
try
{
string ip = "";
try
{
ip = GetClientIP(tcpClient);
channel.Touch();
int i = 0;
bool running = true;
while (running)
{
if (token != null && token.IsCancellationRequested)
{
return;
}
byte[] response = null;
{
// TODO: 也可以在这里等待多少秒，然后超时以后，条件符合时，自动清除 TCP 通道。可以弥补管理线程轮次不及时的缺点
// 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
RecvResult result = await TcpChannel.SimpleRecvTcpPackage(tcpClient,
cache,
(package, start, length) =>
{
return(FindTerminator(package, start, length));
},
this.MaxPackageLength).ConfigureAwait(false); // 2018/10/10 add configure
if (result.Value == -1)
{
if (result.ErrorCode == "ConnectionAborted")
{
Console.WriteLine("client close on request " + i);
}
else
{
Console.WriteLine("recv error on request " + i + ": " + result.ErrorInfo);
}
break;
}
channel.Terminator = (byte)result.Terminator;
Console.WriteLine("request " + i);
// byte [] 转换为 string
channel.Touch();
if (token != null && token.IsCancellationRequested)
{
return;
}
ProcessSipRequestEventArgs e = new ProcessSipRequestEventArgs();
e.Request = result.Package;
this.ProcessRequest(channel, e);
response = e.Response;
}
channel.Touch();
if (token != null && token.IsCancellationRequested)
{
return;
}
{
// 注意调用返回 result.Value == -1 情况下，要及时 Close TcpClient
Result result = await TcpChannel.SimpleSendTcpPackage(tcpClient,
response,
response.Length).ConfigureAwait(false); // 2018/10/10 add configure
channel.Touch();
if (result.Value == -1 || result.Value == 1)
{
Console.WriteLine("error on response " + i + ": " + result.ErrorInfo);
break;
}
}
i++;
}
}
catch (Exception ex)
{
string strError = "ip:" + ip + " HandleClient() 异常: " + ExceptionUtil.GetExceptionText(ex);
LibraryManager.Log?.Error(strError);
// Console.WriteLine(strError);
}
finally
{
// tcpClient.Close();
// 清除全局结果集
}
}
finally
{
_tcpChannels.Remove(channel);
channel.Close();
if (close_action != null)
{
close_action.Invoke();
}
}
}