rapidxml parses just one whole node - c++

Question

I am using RapidXML to parse a string of xml.
There is my string:
std::string str("<?xml version=\"1.0\" encoding=\"UTF-8\"
standalone=\"yes\"?><protocol version=\"1.5\"><srvResponse>
<dateTime>2016-10-18T08:51:50.657+01:00</dateTime><responseFrom ag=\"1\"
/><idMessage>0</idMessage><rejectionCode>0</rejectionCode>
</srvResponse></protocol>");
And here is how I try to parse:
XML::xml_document<> doc;
doc.parse<0>((char*) str.c_str());
XML::xml_node<>* firstNode = doc.first_node();
However, what I get is that it is parsed as with just one node: protocol, ie, siblings, children of protocol are null, simply it does not have.
I think I am missing one principal thing.
Could you find and tell me?
Thank you.

Answer 1

You can save XML data to file, such as "1.xml", then you can do as following:
<?xml version="1.0" encoding="utf-8"?>
<protocol version="1.5">
<srvResponse>
<dateTime>2016-10-18T08:51:50.657+01:00</dateTime>
<responseFrom ag="1"/>
<idMessage>0</idMessage>
<rejectionCode>0</rejectionCode>
</srvResponse>
</protocol>
void ParseWithAtrribute(std::string strFilePath /*= "1.xml"*/)
{
rapidxml::file<> docFile(strFilePath.c_str());
rapidxml::xml_document<> doc;
doc.parse<0>(docFile.data());
rapidxml::xml_node<> *pRootNode = doc.first_node();
if (pRootNode != NULL)
{
std::cout << pRootNode->name() << " " << pRootNode->value()<< std::endl; // protocol
rapidxml::xml_attribute<> *pAttr = pRootNode->first_attribute();
if (pAttr != NULL)
{
std::cout << pAttr->name() << " " << pAttr->value() << std::endl; // version
}
rapidxml::xml_node<> *pChildNode = pRootNode->first_node();
if (pChildNode != NULL)
{
std::cout << pChildNode->name() << " " << pChildNode->value() << std::endl;
rapidxml::xml_node<> * pSonNode = pChildNode->first_node();
for(; pSonNode != NULL; pSonNode = pSonNode->next_sibling())
{
std::cout << pSonNode->name() << " " << pSonNode->value() << std::endl;
rapidxml::xml_attribute<> *pSonAttr = pSonNode->first_attribute();
if (pSonAttr != NULL)
{
std::cout << " " << pSonAttr->name() << ":" << pSonAttr->value() << std::endl;
}
}
}
}
}
Now we do not need to save xml data to file:
void ParseWithAtrribute()
{
std::string str("<?xml version=\"1.0\" encoding=\"utf-8\"?> <protocol version=\"1.5\"> <srvResponse> <dateTime>2016-10-18T08:51:50.657+01:00</dateTime> <responseFrom ag=\"1\"/> <idMessage>0</idMessage> <rejectionCode>0</rejectionCode> </srvResponse> </protocol>");
rapidxml::xml_document<> doc;
doc.parse<0>((char *)(str.c_str()));
rapidxml::xml_node<> *pRootNode = doc.first_node();
if (pRootNode != NULL)
{
std::cout << pRootNode->name() << " " << pRootNode->value() << std::endl; // protocol
rapidxml::xml_attribute<> *pAttr = pRootNode->first_attribute();
if (pAttr != NULL)
{
std::cout << pAttr->name() << " " << pAttr->value() << std::endl; // version
}
rapidxml::xml_node<> *pChildNode = pRootNode->first_node();
if (pChildNode != NULL)
{
std::cout << pChildNode->name() << " " << pChildNode->value() << std::endl;
rapidxml::xml_node<> * pSonNode = pChildNode->first_node();
for (; pSonNode != NULL; pSonNode = pSonNode->next_sibling())
{
std::cout << pSonNode->name() << " " << pSonNode->value() << std::endl;
rapidxml::xml_attribute<> *pSonAttr = pSonNode->first_attribute();
if (pSonAttr != NULL)
{
std::cout << " " << pSonAttr->name() << ":" << pSonAttr->value() << std::endl;
}
}
}
}
}