Delete comments from xml file while parsing it using libxml - c++

Question

Following is the XML file with one of its node(i.e. <date>) being commented.
<?xml version="1.0"?>
<story>
<info>
<author>Abc Xyz</author>
<!--<date>June 2, 2017</date> -->
<keyword>example keyword</keyword>
</info>
</story>
What I want is to remove that commented line/node completely from the XML file using libxml library and it should look as below:
<?xml version="1.0"?>
<story>
<info>
<author>Abc Xyz</author>
<keyword>example keyword</keyword>
</info>
</story>
I also referred the libxml documentation but that didn't helped me much with the "comment/s" in XML file.

Answer 1

I tried in a different way and it worked. Looks like using xmlreader for modifying the xml will not help much, instead I did xmlReadMemory(), then while parsing did following check:
if(node->type == XML_COMMENT_NODE){ //node is of type xmlNodePtr
xmlUnlinkNode(node);
xmlFreeNode(node);
}
And finally xmlDocDumpFormatMemory() to store the modified xml in xmlbuffer.

Answer 2

You can use NodeType() while parsing the xml and check for each node if it’s a comment (8 means comment, see here: http://xmlsoft.org/xmlreader.html#Extracting) and then remove it with xmlUnlinkNode() and xmlFreeNode().