QByteArray to char*, sending with libcurl

Question

I'm having trouble with saving a QPixmap to QByteArray, then writing it to char*. For example i'm trying to write to a file with ofstream.

                 QByteArray bytes;
                 QBuffer buff(&bytes);
                 buff.open(QIODevice::ReadOnly);
                 pixmap.save(&buff, "PNG");

                 QString str(bytes);

                 char *data;
                 data =  (char*)qstrdup(str.toAscii().constData());

                ofstream myfile;
                 myfile.open ("test.jpg");
                   myfile << data;
                   myfile.close();

But all i get in that file is:

‰PNG

The reason i need a char* , is because i'm having some permission problems when writing to disk, then sending with libcurl. I want to load it to a char* , then send it directly from memory.

Answer 1

You encounter a null-byte. You'll need something like write(), because the << operator doesn't allow you to tell how long the string is and stops writing at the first null byte:

const QByteArray array = str.toAscii();
myfile.write(array.constData(), array.size());

See e.g. http://www.cplusplus.com/reference/iostream/ostream/write/

Answer 2

Solved the problem using this:

 memcpy(data,bytes.constData(),bytes.size()+1);

Should have tried that at least.

Answer 3

Not directly related, but is there any reason you use libcurl instead of the integrated QNetworkAccessManager?