Save binary data into XML file

[squidge]

Yes, I'm going to assume you know how to read/write/delete disk files, so for the XML part, Qt has XML classes. You can read the binary file into memory, encode as Base64 (using QByteArray::toBase64) and then place the data into a CDATA section of the XML using QDomDocument::createCDATASection, QXmlStreamWriter::writeCDATA, or even just QXmlStreamWriter::writeCharacters.

[SudanBoy]

You can read the binary file into memory, encode as Base64 (using QByteArray::toBase64) and then place the data into a CDATA section of the XML using QDomDocument::createCDATASection, QXmlStreamWriter::writeCDATA, or even just QXmlStreamWriter::writeCharacters.

I have similar issue.

I have a pointer to a buffer contains Binary-data .. I want to pull the values inside the buffer and encoding them before putting them in my xml format .. so I though of this:

QByteArray text;
for (int i=0; i<len_of_my_buffer; i++){
text[i] = *pointer_to_buffer[i];
}
create_xml_function(text.toBase64, "encoded data")

is this right ?

[d_stranz]

is this right ?

No. A QByteArray is created empty with no size, so accessing text[ i ] on an empty array will cause a crash. Do this:

QByteArray text64 = QByteArray::fromRawData( pointer_to_buffer, len_of_my_buffer ).toBase64();
create_xml_function( text64, "encoded_data" );  // spaces not allowed in XML tags!

QByteArray text64 = QByteArray::fromRawData( pointer_to_buffer, len_of_my_buffer ).toBase64();
create_xml_function( text64, "encoded_data" );  // spaces not allowed in XML tags!

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Of course, you will want to add some error checking...

[SudanBoy]

No. A QByteArray is created empty with no size, so accessing text[ i ] on an empty array will cause a crash. Do this:

QByteArray text64 = QByteArray::fromRawData( pointer_to_buffer, len_of_my_buffer ).toBase64();
create_xml_function( text64, "encoded_data" );  // spaces not allowed in XML tags!

QByteArray text64 = QByteArray::fromRawData( pointer_to_buffer, len_of_my_buffer ).toBase64();
create_xml_function( text64, "encoded_data" );  // spaces not allowed in XML tags!

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Of course, you will want to add some error checking...

Thanks, it works now and I am passing it to my xml. you were right, my Qbytearray was "empty with no size"