如何在 C# 中编写 Apple 推送通知提供程序？

How to write an Apple Push Notification Provider in C#?

提问by Phobis

Apple really had bad documentation about how the provider connects and communicates to their service (at the time of writing - 2009). I am confused about the protocol. How is this done in C#?

Apple 确实有关于提供商如何连接和通信其服务的糟糕文档（在撰写本文时 - 2009 年）。我对协议感到困惑。这是如何在 C# 中完成的？

采纳答案by shader

Working code example:

工作代码示例：

int port = 2195;
String hostname = "gateway.sandbox.push.apple.com";

//load certificate
string certificatePath = @"cert.p12";
string certificatePassword = "";
X509Certificate2 clientCertificate = new X509Certificate2(certificatePath, certificatePassword);
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, SslProtocols.Tls, true);
}
catch (AuthenticationException ex)
{
    client.Close();
    return;
}

// Encode a test message into a byte array.
MemoryStream memoryStream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(memoryStream);

writer.Write((byte)0);  //The command
writer.Write((byte)0);  //The first byte of the deviceId length (big-endian first byte)
writer.Write((byte)32); //The deviceId length (big-endian second byte)

String deviceId = "DEVICEIDGOESHERE";
writer.Write(ToByteArray(deviceId.ToUpper()));

String payload = "{\"aps\":{\"alert\":\"I like spoons also\",\"badge\":14}}";

writer.Write((byte)0); //First byte of payload length; (big-endian first byte)
writer.Write((byte)payload.Length); //payload length (big-endian second byte)

byte[] b1 = System.Text.Encoding.UTF8.GetBytes(payload);
writer.Write(b1);
writer.Flush();

byte[] array = memoryStream.ToArray();
sslStream.Write(array);
sslStream.Flush();

// Close the client connection.
client.Close();

回答by Chaos

I hope this is relevant (slightly), but I have just successfully created one for Java, so conceptually quite similar to C# (except perhaps the SSL stuff, but that shouldn't be too hard to modify. Below is a sample message payload and crypto setup:

我希望这是相关的（稍微），但我刚刚成功地为 Java 创建了一个，所以在概念上与 C# 非常相似（除了 SSL 的东西，但这不应该太难修改。下面是一个示例消息有效负载和加密设置：

    int port = 2195;
    String hostname = "gateway.sandbox.push.apple.com";


    char []passwKey = "<keystorePassword>".toCharArray();
    KeyStore ts = KeyStore.getInstance("PKCS12");
    ts.load(new FileInputStream("/path/to/apn_keystore/cert.p12"), passwKey);

    KeyManagerFactory tmf = KeyManagerFactory.getInstance("SunX509");
    tmf.init(ts,passwKey);
    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(tmf.getKeyManagers(), null, null);
    SSLSocketFactory factory =sslContext.getSocketFactory();
    SSLSocket socket = (SSLSocket) factory.createSocket(hostname,port); // Create the ServerSocket
    String[] suites = socket.getSupportedCipherSuites();
    socket.setEnabledCipherSuites(suites);
    //start handshake

    socket.startHandshake();


    // Create streams to securely send and receive data to the server
    InputStream in = socket.getInputStream();
    OutputStream out = socket.getOutputStream();



    // Read from in and write to out...
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    baos.write(0); //The command
    System.out.println("First byte Current size: " + baos.size());

    baos.write(0); //The first byte of the deviceId length    
    baos.write(32); //The deviceId length

    System.out.println("Second byte Current size: " + baos.size());

    String deviceId = "<heaxdecimal representation of deviceId";
    baos.write(hexStringToByteArray(deviceId.toUpperCase()));
    System.out.println("Device ID: Current size: " + baos.size());


    String payload = "{\"aps\":{\"alert\":\"I like spoons also\",\"badge\":14}}";
    System.out.println("Sending payload: " + payload);
    baos.write(0); //First byte of payload length;
    baos.write(payload.length());
    baos.write(payload.getBytes());

    out.write(baos.toByteArray());
    out.flush();

    System.out.println("Closing socket..");
    // Close the socket
    in.close();
    out.close();

}

}

Once again, not C#, but at least closer than the poor ObjC sample that Apple provides.

再一次，不是 C#，但至少比 Apple 提供的糟糕的 ObjC 示例更接近。

回答by applefreak

The best APNSSharpproject available on Github. It worked for me absolutely fine in just couple of minutes!

Github 上最好的APNSSharp项目。它在几分钟内对我来说非常好！

回答by shay

You can use the PushSharplibrary in GitHub.

您可以使用GitHub 中的PushSharp库。

I am using it in all of my projects

我在我所有的项目中都使用它

回答by Chandrashekhar Komati

  public ActionResult ios()
    {
        string message = string.Empty;

        var certi = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Certificates2.p12");
        var appleCert = System.IO.File.ReadAllBytes(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Certificates2.p12"));

        ApnsConfiguration apnsConfig = new ApnsConfiguration(ApnsConfiguration.ApnsServerEnvironment.Production, appleCert, "Password");

        var apnsBroker = new ApnsServiceBroker(apnsConfig);
        apnsBroker.OnNotificationFailed += (notification, aggregateEx) =>
        {
            aggregateEx.Handle(ex =>
            {
                if (ex is ApnsNotificationException)
                {
                    var notificationException = (ApnsNotificationException)ex;
                    var apnsNotification = notificationException.Notification;
                    var statusCode = notificationException.ErrorStatusCode;
                    var inner = notificationException.InnerException;
                    message = "IOS Push Notifications: Apple Notification Failed: ID=" + apnsNotification.Identifier + ", Code=" + statusCode + ", Inner Exception" + inner;
                }
                else
                {
                    message = "IOS Push Notifications: Apple Notification Failed for some unknown reason : " + ex.InnerException;
                }
                return true;
            });
        };

        apnsBroker.OnNotificationSucceeded += (notification) =>
        {
            message = "IOS Push Notifications: Apple Notification Sent!";
        };

        apnsBroker.Start();
        try
        {
            string deviceToken = "33c2f3a13c90dc62660281913377c22066c1567e23c2ee2c728e0f936ff3ee9b";

            apnsBroker.QueueNotification(new ApnsNotification
            {
                DeviceToken = deviceToken,
                Payload = JObject.Parse("{\"aps\":{\"alert\":\" Test Message\", \"badge\":1, \"sound\":\" default\",}}")
            });
        }
        catch (Exception ex)
        {
            Console.Write(ex);
        }
        apnsBroker.Stop();

        return View(message);
    }