B4J Question [SOLVED] B4XSearializator Compression type for jRDC2 C++ Client

[Binary01]

Hi,

About B4XSerializator

Hi, I wanted to investigate about this topic.. could please somebody tell me where to find some info, or tell me how does it work? I know that it's for converting complex objects to bytes.. but, is it related about encryption data? if not, what happens wrong without using it? Please, take a...

www.b4x.com

B4XSerializator doesn't encrypt the data.
It takes objects and converts them (serializes them) to bytes.
You can use your own serialization method if you want to interact with a non-B4X program.

But
I have existing working jRDC2 servers and B4X clients Apps.

Now I want to link jRDC2 Server with Computer Software that developed with Qt C++.

I also found .Net B4XSearializator for SharpLib for .NET platform and another language python code also.
I want to create a Qt C++ Client for jRDC2 Server.
My problem is to get suitable B4XSearializator' compression.

When I use data with qCompress code without zlib and send data to jRDC2 Server
jRDC2 Server shows (ZipException) java.util.zip.ZipException: unknown compression method

//Qt C++
QByteArray convertObjectToBytes(const QVariant &obj)
{       
QByteArray byteArray;       
QDataStream writer(&byteArray, QIODevice::WriteOnly);       
writeObject(writer, obj);       
QByteArray compressedData = qCompress(byteArray);       
return compressedData;   
}

I found a code in phthon.
b = zlib.compress(self._writer.getvalue())

So I change to zlib compression , jRDC2 Server shows (EOFException) java.io.EOFException

//Qt C++
QByteArray byteArray;
    QDataStream writer(&byteArray, QIODevice::WriteOnly);
    writeObject(writer, obj);

    const int compressionLevel = Z_BEST_COMPRESSION;
    uLongf compressedDataSize = compressBound(byteArray.size());
    QByteArray compressedData(compressedDataSize, 0);

    int result = compress2(reinterpret_cast<Bytef *>(compressedData.data()), &compressedDataSize,
                           reinterpret_cast<const Bytef *>(byteArray.constData()), byteArray.size(), compressionLevel);

    if (result == Z_OK) {
        compressedData.resize(compressedDataSize);
        return compressedData;
    } else {
        // Handle the error, for example, by returning an empty QByteArray
        return QByteArray();
    }

How can I fix it?

 

[Binary01]

Now I solved my problem.