#include <xercesc/framework/Wrapper4InputSource.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/sax2/SAX2XMLReader.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/dom/DOMLSParser.hpp>
#include <xercesc/dom/DOMImplementation.hpp>
#include <xercesc/sax2/XMLReaderFactory.hpp>
#include <xercesc/framework/MemBufInputSource.hpp>
#include <xercesc/framework/LocalFileInputSource.hpp>
#include <xercesc/sax/ErrorHandler.hpp>
#include <xercesc/sax/SAXParseException.hpp>
#include <xercesc/sax/Parser.hpp>
#include <xercesc/validators/common/Grammar.hpp>
class CErrorHandler : public xercesc::DefaultHandler
{
public:
CErrorHandler();
virtual ~CErrorHandler();
void startElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname,
const XERCES_CPP_NAMESPACE::Attributes& attrs
);
void endElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname
);
void characters(const XMLCh* const chars,
const XMLSize_t length
);
void fatalError(const xercesc::SAXParseException&);
};
CErrorHandler::CErrorHandler()
{
}
CErrorHandler::~CErrorHandler()
{
}
void CErrorHandler::startElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname,
const xercesc::Attributes& attrs)
{
char* name = xercesc::XMLString::transcode(localname);
std::cout << name;
xercesc::XMLString::release(&name);
}
void CErrorHandler::endElement(const XMLCh* const uri,
const XMLCh* const localname,
const XMLCh* const qname)
{
char* name = xercesc::XMLString::transcode(localname);
xercesc::XMLString::release(&name);
}
void CErrorHandler::fatalError(const xercesc::SAXParseException& exception)
{
char* message = xercesc::XMLString::transcode(exception.getMessage());
std::cout << "Error: " << message << " at line: " << exception.getLineNumber() << std::endl;
xercesc::XMLString::release(&message);
}
void CErrorHandler::characters(const XMLCh* const chars,
const XMLSize_t length
)
{
}
bool validateSchema()
{
std::string XSD_SHEMA ="<?xml version=\"1.0\" encoding=\"UTF-8\" ?>...";
try
{
xercesc::XMLPlatformUtils::Initialize();
}
catch (const XERCES_CPP_NAMESPACE::XMLException& toCatch)
{
char* message = xercesc::XMLString::transcode(toCatch.getMessage());
std::cout << "Error during initialization!" << std::endl;
std::cout << "Exception message is: " << message;
XERCES_CPP_NAMESPACE::XMLString::release(&message);
return false;
}
xercesc::SAX2XMLReader* parser = xercesc::XMLReaderFactory::createXMLReader();
parser->setFeature( xercesc::XMLUni::fgSAX2CoreValidation, true);
parser->setFeature( xercesc::XMLUni::fgSAX2CoreNameSpaces, true);
xercesc::DefaultHandler* defaultHandler = new CErrorHandler();
xercesc::ContentHandler* h = new CErrorHandler();
xercesc::MemBufInputSource mis(reinterpret_cast< const XMLByte* >(XSD_SHEMA.c_str() ), XSD_SHEMA.size (), "/schema.xsd");
xercesc::Wrapper4InputSource wmis (&mis, false);
parser->loadGrammar (&wmis, xercesc::Grammar::SchemaGrammarType, true);
parser->setFeature (xercesc::XMLUni::fgXercesUseCachedGrammarInParse, true);
void* id = (void*)("file:///schema.xsd");
parser->setProperty (xercesc::XMLUni::fgXercesSchemaExternalNoNameSpaceSchemaLocation, id);
parser->setContentHandler(h);
parser->setErrorHandler(defaultHandler);
try
{
parser->parse(mXMLFilePath.c_str());
}
catch (const xercesc::XMLException& toCatch)
{
char* message = xercesc::XMLString::transcode(toCatch.getMessage());
std::cout << "Exception message is: "<< message << std::endl;;
xercesc::XMLString::release(&message);
return false;
}
catch (const xercesc::SAXParseException& toCatch)
{
char* message = xercesc::XMLString::transcode(toCatch.getMessage());
std::cout << "Exception message is: " << message << std::endl;;
xercesc::XMLString::release(&message);
return false;
}
catch (...)
{
std::cout << "Unexpected Exception" ;
return false;
}
delete parser;
delete defaultHandler;
return true;
}
我正在尝试使用 Xerces lib 在 C++ 中验证具有路径 mXMLFilePath 和字符串 XSD_SHEMA 中的 xsd 架构的 xml 文件。 我创建了 CErrorHandler 类并对其进行了初始化,设置了模式 nolocation 参数,以便不在模式的 xml 路径中设置。 它构建,但不工作。有人有什么想法吗?
最佳答案
Xerces 库(用于解析和加载语法)可以处理输入源(也称为实现 InputSource 接口(interface)的类)。 MemBufInputSource 将是某些内容仅存在于内存中的情况的类。
XMLPlatformUtils::Initialize();
XercesDOMParser* domParser;
domParser = new XercesDOMParser();
char *str = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<xs:schema xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" elementFormDefault=\"qualified\" attributeFormDefault=\"unqualified\"> \r\n </xs:schema>";
std::string strContent = str;
xercesc::MemBufInputSource pMemBufIS((XMLByte*)strContent.c_str(),
strContent.size(), "xsd");
if (domParser->loadGrammar(pMemBufIS, Grammar::SchemaGrammarType) == NULL)
{
fprintf(stderr, "couldn't load schema\n");
return false;
}
domParser->setValidationScheme(XercesDOMParser::Val_Auto);
domParser->setDoNamespaces(true);
domParser->setDoSchema(true);
domParser->setValidationConstraintFatal(true);
domParser->setExternalNoNamespaceSchemaLocation("C:\\User\\b.xsd");
domParser->setValidationConstraintFatal(true);
domParser->parse("file.xml");
if (domParser->getErrorCount() == 0)
printf("XML file validated against the schema successfully\n");
else
printf("XML file doesn't conform to the schema\n");
关于c++ - 在 xerces C++ 中使用内存模式验证 xml 文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22565157/