c# 中的 Apple 推送通知服务代码服务器端

Question

查看下面的编辑，我发现问题出在 c# 代码上，但无法找到！

我知道以前最大有效负载大小为 256b，但现在使用 ios8 我们可以发送高达 2kb 的有效负载，但它不适合我。

这里说： APN (Apple Push Notification) payload size limit

例子：

如果我发送此有效负载工作正常（我收到通知）：

{"aps":{"alert":"New negotiation opened from (idOperation: 5) pablo.gomez","sound":"default"},"data":{"notificationType":"2","idOperation":"5","link":"http://localhost:7000/Login.aspx?idInstance=9&forward=VE9fVHJhZGluZy5hc3B4P2lkT3BlcmF0aW9uPTU="}}

但如果我再发送一个，它就不起作用（我的手机上没有收到），例如：

"{"aps":{"alert":"New negotiation test test test test test test test opened from (idOperation: 5) pablo.gomez","sound":"default"},"data":{"notificationType":"2","idOperation":"5","link":"http://localhost:7000/Login.aspx?idInstance=9&forward=VE9fVHJhZGluZy5hc3B4P2lkT3BlcmF0aW9uPTU="}}"

我也在开发和生产中尝试过这个。第二个都失败了。我已经用 iPhone 5 iOS 8.1.3 对此进行了测试

我的应用的 iOS 部署目标是 iOS 8.0，但我上传到商店的版本部署目标是 iOS 7.0，所以这可能是我在生产环境中测试时的问题？

我在这里阅读了有关通知类别的信息： iOS8 and iOS7 Push Notification Payload

也许这可以解决它？

这就是我使用 c# 将有效负载发送到苹果的方式

        ...
        try
            {
                memoryStream = new MemoryStream();
                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)
                //bw.Write(new byte[] { 0, 0, 32 }); Other way of doing this.
                writer.Write(this.HexStringToByteArray(token.ToUpper()));

                writer.Write((byte)0);
                writer.Write((byte)payload.Length);
                writer.Write(System.Text.Encoding.UTF8.GetBytes(payload));
                writer.Flush();

                sslStream.Write(memoryStream.ToArray());
                sslStream.Flush();
                responseString += " SENT TO: " + token + "<br />";
            }
        ...


private byte[] HexStringToByteArray(string hexString)
    {
        if (hexString == null)
            return null;

        if (hexString.Length % 2 == 1)
            hexString = '0' + hexString; // Up to you whether to pad the first or last byte

        byte[] data = new byte[hexString.Length / 2];

        for (int i = 0; i < data.Length; i++)
            data[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);

        return data;
    }

编辑：我尝试在 PHP 中使用脚本推送通知，但工作正常，所以问题是为什么我的 c# 代码..但在这里找不到问题..

Answer 1

好的，所以终于弄清楚了问题所在。 正如您在代码中看到的，我发送的命令是0，它是通知服务的旧版本。

新的通知版本是2，如下所述： https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/CommunicatingWIthAPS.html#//apple_ref/doc/uid/TP40008194-CH101-SW4

所以我做了一个重构来支持这个新版本，现在所有的通知都可以正常接收了。

工作代码是这样的：

        ...
        try
            {
                memoryStream = new MemoryStream();
                writer = new BinaryWriter(memoryStream);

                writer.Write((byte)2);  // The command (version 2)

                // 4 bytes for the frameLength (this includes all the items ids listed below)
                int frameLength = 1 + 2 + 32 + 1 + 2 + payload.Length; // (tokenCommand + tokenLength + token) + (payloadCommand + payloadLength + payload) 
                this.writeIntBytesAsBigEndian(writer, frameLength, 4);

                // DEVICE ID
                writer.Write((byte)1);  // Command for Item ID: deviceId
                byte[] tokenBytes = this.HexStringToByteArray(token);
                this.writeIntBytesAsBigEndian(writer, tokenBytes.Length, 2);
                writer.Write(tokenBytes);

                // PAYLOAD
                writer.Write((byte)2); // Command for Item ID: payload
                this.writeIntBytesAsBigEndian(writer, payload.Length, 2);
                writer.Write(Encoding.ASCII.GetBytes(payload), 0, payload.Length);

                writer.Flush();

                sslStream.Write(memoryStream.ToArray());
                sslStream.Flush();
                responseString += " SENT TO: " + token + "<br />";
            }
            ...


    private void writeIntBytesAsBigEndian(BinaryWriter writer, int value, int bytesCount)
    {
        byte[] bytes = null;
        if (bytesCount == 2)
            bytes = BitConverter.GetBytes((Int16)value);
        else if (bytesCount == 4)
            bytes = BitConverter.GetBytes((Int32)value);
        else if (bytesCount == 8)
            bytes = BitConverter.GetBytes((Int64)value);

        if (bytes != null)
        {
            Array.Reverse(bytes);
            writer.Write(bytes, 0, bytesCount);
        }
    }