从 C# 代码向苹果手机发送推送通知时，我收到此错误。我搜索了这个问题，但这些答案无法解决这个问题。任何人都可以给我建议来解决这个问题。
protected void Page_Load(object sender, EventArgs e)
{
string deviceID = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
string certificateFilePath ="XXXXXXX.cer";
pushMessage(deviceID, certificateFilePath);
}
public void pushMessage(string deviceID, string certificateFilePath)
{
try
{
int port = 2195;
String hostname = "gateway.sandbox.push.apple.com";
String certificatePath = HttpContext.Current.Server.MapPath(certificateFilePath);
X509Certificate2 clientCertificate = new X509Certificate2(certificatePath);
X509Certificate2Collection certificatesCollection = new X509Certificate2Collection(clientCertificate);
TcpClient client = new TcpClient(hostname, port);
SslStream sslStream = new SslStream(
client.GetStream(),
false,
new RemoteCertificateValidationCallback(ValidateServerCertificate),
null
);
try
{
sslStream.AuthenticateAsClient(hostname, certificatesCollection, System.Security.Authentication.SslProtocols.Default, true);
//sslStream.AuthenticateAsClient(hostname, certificatesCollection, System.Security.Authentication.SslProtocols.Default, false);
//sslStream.AuthenticateAsClient(hostname, certificatesCollection, System.Security.Authentication.SslProtocols.Tls, true);
}
catch (AuthenticationException ex)
{
client.Close();
return;
}
MemoryStream memoryStream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(memoryStream);
writer.Write((byte)0);
writer.Write((byte)0);
writer.Write((byte)32);
String deviceId = deviceID;
writer.Write(HexStringToByteArray(deviceId.ToUpper()));
String payload = "{\"aps\":{\"alert\":\"Test...\",\"badge\":1}}";
writer.Write((byte)0);
writer.Write((byte)payload.Length);
byte[] b1 = System.Text.Encoding.UTF8.GetBytes(payload);
writer.Write(b1);
writer.Flush();
byte[] array = memoryStream.ToArray();
sslStream.Write(array);
sslStream.Flush();
client.Close();
}
catch { }
}