IOS Pushnotification in Arabic language

Question

Please let me know how to send push notification in non-English language.

I am following this for sending push notification. English push notifications are OK.

But when I am trying with non English language getting notification as ???????????????????.

After searching in google getting suggestions to change the length in payload. Can any one help me out where to change size length in following method?

private static byte[] GeneratePayload(NotificationPayload payload)
    {
      try
      {
        //convert Devide token to HEX value.
        byte[] deviceToken = new byte[payload.DeviceToken.Length / 2];
        for (int i = 0; i < deviceToken.Length; i++)
            deviceToken[i] = byte.Parse(payload.DeviceToken.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber);

        var memoryStream = new MemoryStream();

        // Command
        memoryStream.WriteByte(1); // Changed command Type 

        //Adding ID to Payload          
        memoryStream.Write(Encoding.ASCII.GetBytes(payload.PayloadId.ToString()), 0, payload.PayloadId.ToString().Length);

        //Adding ExpiryDate to Payload
        int epoch = (int) (DateTime.UtcNow.AddMinutes(300) - new DateTime(1970, 1, 1)).TotalSeconds;
        byte[] timeStamp = BitConverter.GetBytes(epoch);
        memoryStream.Write(timeStamp, 0, timeStamp.Length);

        byte[] tokenLength = BitConverter.GetBytes((Int16) 32);
        Array.Reverse(tokenLength);
        // device token length
        memoryStream.Write(tokenLength, 0, 2);

        // Token
        memoryStream.Write(deviceToken, 0, 32);

      // String length
        string apnMessage = payload.ToJson();
        Logger.Info("Payload generated for " + payload.DeviceToken + " : " + apnMessage);

        byte[] apnMessageLength = BitConverter.GetBytes((Int16) apnMessage.Length);
        Array.Reverse(apnMessageLength);

        // message length
        memoryStream.Write(apnMessageLength, 0, 2); 

        // Write the message
        memoryStream.Write(Encoding.ASCII.GetBytes(apnMessage), 0, apnMessage.Length);        
        return memoryStream.ToArray();
      }
      catch (Exception ex)
      {
        Logger.Error("Unable to generate payload - " + ex.Message);
        return null;
      }
    }

score 1 · Accepted Answer · edited May 23 '17 at 12:26

with reference to this modified GeneratePayload method and I am able to send push notifications in any non english language. Code as follows:

private static byte[] GeneratePayload(NotificationPayload payload)
    {
      try
      {
        //convert Devide token to HEX value.
        byte[] deviceToken = new byte[payload.DeviceToken.Length / 2];
        for (int i = 0; i < deviceToken.Length; i++)
            deviceToken[i] = byte.Parse(payload.DeviceToken.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber);

        var 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)

        writer.Write(deviceToken);       

        writer.Write((byte)0); //First byte of payload length; (big-endian first byte)        
        byte[] b1 = System.Text.Encoding.UTF8.GetBytes(payload.ToJson());
        writer.Write((byte)b1.Length);       
        writer.Write(b1);
        writer.Flush();

        byte[] array = memoryStream.ToArray();

        // Command
        memoryStream.WriteByte(1); // Changed command Type 

        //Adding ID to Payload                  
        memoryStream.Write(Encoding.ASCII.GetBytes(payload.PayloadId.ToString()), 0, payload.PayloadId.ToString().Length);

        //Adding ExpiryDate to Payload
        int epoch = (int) (DateTime.UtcNow.AddMinutes(300) - new DateTime(1970, 1, 1)).TotalSeconds;
        byte[] timeStamp = BitConverter.GetBytes(epoch);
        memoryStream.Write(timeStamp, 0, timeStamp.Length);

        byte[] tokenLength = BitConverter.GetBytes((Int16) 32); 
        Array.Reverse(tokenLength);
        // device token length
        memoryStream.Write(tokenLength, 0, 2);

        // Token
        memoryStream.Write(deviceToken, 0, 32);

      // String length
        string apnMessage = payload.ToJson(); 
        Logger.Info("Payload generated for " + payload.DeviceToken + " : " + apnMessage);

        byte[] apnMessageLength = BitConverter.GetBytes((Int16)apnMessage.Length);
        Array.Reverse(apnMessageLength);

        // message length
        memoryStream.Write(apnMessageLength, 0, 2); 

        // Write the message        
        memoryStream.Write(Encoding.ASCII.GetBytes(apnMessage), 0, apnMessage.Length);
        return array;
      }
      catch (Exception ex)
      {
        Logger.Error("Unable to generate payload - " + ex.Message);
        return null;
      }
    }

IOS Pushnotification in Arabic language

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