我使用Unity时，BeginConnect和套接字上的其他异步方法遇到了一些问题。
有些事情我不了解，但是之前的代码示例对我不起作用。
因此，我编写了这段代码以使其起作用。我在带有android和pc的即席网络上进行了测试，也可以在我的计算机上进行本地测试。希望能有所帮助。
using System.Net.Sockets;
using System.Threading;
using System.Net;
using System;
using System.Diagnostics;
class ConnexionParameter : Guardian
{
public TcpClient client;
public string address;
public int port;
public Thread principale;
public Thread thisthread = null;
public int timeout;
private EventWaitHandle wh = new AutoResetEvent(false);
public ConnexionParameter(TcpClient client, string address, int port, int timeout, Thread principale)
{
this.client = client;
this.address = address;
this.port = port;
this.principale = principale;
this.timeout = timeout;
thisthread = new Thread(Connect);
}
public void Connect()
{
WatchDog.Start(timeout, this);
try
{
client.Connect(IPAddress.Parse(address), port);
}
catch (Exception)
{
UnityEngine.Debug.LogWarning("Unable to connect service (Training mode? Or not running?)");
}
OnTimeOver();
//principale.Resume();
}
public bool IsConnected = true;
public void OnTimeOver()
{
try
{
if (!client.Connected)
{
/*there is the trick. The abort method from thread doesn't
make the connection stop immediately(I think it's because it rise an exception
that make time to stop). Instead I close the socket while it's trying to
connect , that make the connection method return faster*/
IsConnected = false;
client.Close();
}
wh.Set();
}
catch(Exception)
{
UnityEngine.Debug.LogWarning("Connexion already closed, or forcing connexion thread to end. Ignore.");
}
}
public void Start()
{
thisthread.Start();
wh.WaitOne();
//principale.Suspend();
}
public bool Get()
{
Start();
return IsConnected;
}
}
public static class Connexion
{
public static bool Connect(this TcpClient client, string address, int port, int timeout)
{
ConnexionParameter cp = new ConnexionParameter(client, address, port, timeout, Thread.CurrentThread);
return cp.Get();
}
//http://stackoverflow.com/questions/19653588/timeout-at-acceptsocket
public static Socket AcceptSocket(this TcpListener tcpListener, int timeoutms, int pollInterval = 10)
{
TimeSpan timeout = TimeSpan.FromMilliseconds(timeoutms);
var stopWatch = new Stopwatch();
stopWatch.Start();
while (stopWatch.Elapsed < timeout)
{
if (tcpListener.Pending())
return tcpListener.AcceptSocket();
Thread.Sleep(pollInterval);
}
return null;
}
}
在C＃上有一个非常简单的看门狗可以使其工作：
using System.Threading;
public interface Guardian
{
void OnTimeOver();
}
public class WatchDog {
int m_iMs;
Guardian m_guardian;
public WatchDog(int a_iMs, Guardian a_guardian)
{
m_iMs = a_iMs;
m_guardian = a_guardian;
Thread thread = new Thread(body);
thread.Start(this);
}
private void body(object o)
{
WatchDog watchdog = (WatchDog)o;
Thread.Sleep(watchdog.m_iMs);
watchdog.m_guardian.OnTimeOver();
}
public static void Start(int a_iMs, Guardian a_guardian)
{
new WatchDog(a_iMs, a_guardian);
}
}