Question

我正在尝试开发自己的Apple Push Notification Server应用程序，以向iOS设备发送推送通知。我从GitHub下载了Moon-APNS的源代码，并对其进行了修改以适应我的Web API应用程序。

以下代码行导致IIS抛出未处理的win32异常：

apnsStream.BeginRead(response, 0, 6, new AsyncCallback(ReadResponse), new MyAsyncInfo(response, apnsStream));

我查看我的计算机应用程序Windows登录事件查看器，未处理的异常来自ReadResponse方法。我有一个包含ReadResponse方法和apnsStream.BeginRead语句中包含的try-catch调用的代码，它仍然会抛出一个未处理的异常。

消息：安全句柄已关闭

堆栈跟踪：在System.Net.LazyAsyncResult.Complete（IntPtr userToken）   在System.Net.FixedSizeReader.ReadCallback（IAsyncResult   transportResult）在System.Net.LazyAsyncResult.Complete（IntPtr   userToken）   System.Threading.ExecutionContext.RunInternal（执行上下文   executionContext，ContextCallback回调，对象状态，布尔值   preserveSyncCtx）at   System.Threading.ExecutionContext.Run（执行上下文   executionContext，ContextCallback回调，对象状态，布尔值   preserveSyncCtx）at   System.Threading.ExecutionContext.Run（执行上下文   executionContext，ContextCallback回调，对象状态）at   System.Net.ContextAwareResult.Complete（IntPtr userToken）at   System.Net.Sockets.BaseOverlappedAsyncResult.CompletionPortCallback（UInt32的   errorCode，UInt32 numBytes，NativeOverlapped * nativeOverlapped）at   System.Threading._IOCompletionCallback.PerformIOCompletionCallback（UInt32的   errorCode，UInt32 numBytes，NativeOverlapped * pOVERLAP）

以下是我将TcpClient打开到Apple推送通知服务器时的完整部分来源：

using(TcpClient apnsClient = new TcpClient())
{
    //open connection to the Apple Push Notification service a TCP client connection
    apnsClient.Connect("gateway.sandbox.push.apple.com", 2195);

    //open an SSL Stream
    using(SslStream apnsStream = new SslStream(apnsClient.GetStream(), false, ValidateServerCertificate, SelectLocalCertificate))
    {
        apnsStream.AuthenticateAsClient("gateway.sandbox.push.apple.com", certificates, System.Security.Authentication.SslProtocols.Default, false);

        _CanReadStream = apnsStream.CanRead;
        _IsConnected = true;

        var response = new byte[6];

        apnsStream.BeginRead(response, 0, 6, new AsyncCallback(ReadResponse), new MyAsyncInfo(response, apnsStream));

        //put code to generate payload here           
    }
}

来自ReadResponse方法的源代码

private void ReadResponse(IAsyncResult ar)
{
    if (_IsConnected) return;

    int payLoadIndex = 0;
    string payLoadId = string.Empty;

    try
    {
        var info = ar.AsyncState as MyAsyncInfo;
        info.Stream.ReadTimeout = 100;

        if (_CanReadStream)
        {
            var command = Convert.ToInt16(info.ByteArray[0]);
            var status = Convert.ToInt16(info.ByteArray[1]);
            var id = new byte[4];
            Array.Copy(info.ByteArray, 2, id, 0, 4);

            payLoadId = Encoding.Default.GetString(id);
            payLoadIndex = int.Parse(payLoadId) - 1000;

            _RejectedDevices.Add(_NotificationPayload[payLoadIndex].DeviceToken);

             _IsConnected = false;
         }
    }
    catch(Exception ex)
    {
        throw ex;
    }
}

如何解决此问题？

安全手柄已关闭 - 月亮APNS

0 个答案: