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#include "external_command.h"
#include <xalanc/XSLT/XSLTInputSource.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <boost/process.hpp>
#include <boost/optional.hpp>
#include <sstream>
#include "support/xerces_string_guard.h"
#include "support/dom/result_node_facade.h"
namespace {
using InputXSLT::XercesStringGuard;
inline bool isWrappedOutput(const XMLCh* nodeName) {
return xercesc::XMLString::equals(
nodeName,
*XercesStringGuard<XMLCh>("inputxslt_wrapper")
);
}
std::unique_ptr<std::stringstream> readOutput(
boost::process::ipstream& outputStream) {
const std::string rawOutput(
(std::istreambuf_iterator<char>(outputStream)),
(std::istreambuf_iterator<char>())
);
if ( rawOutput.substr(0, 5) == "<?xml"
|| rawOutput.substr(0,2) == "<!" ) {
return std::make_unique<std::stringstream>(
rawOutput
);
} else {
return std::make_unique<std::stringstream>(
"<inputxslt_wrapper>" + rawOutput + "</inputxslt_wrapper>"
);
}
}
boost::optional<xercesc::DOMNode*> importDocumentElement(
std::stringstream* const outputStream,
xercesc::DOMDocument* const domDocument
) {
xercesc::XercesDOMParser parser;
parser.setDoNamespaces(true);
parser.parse(xalan::XSLTInputSource(*outputStream));
if ( parser.getErrorCount() == 0 ) {
return boost::make_optional(
domDocument->importNode(
parser.getDocument()->getDocumentElement(),
true
)
);
} else {
return boost::optional<xercesc::DOMNode*>();
}
}
}
namespace InputXSLT {
DomDocumentCache::document_ptr FunctionExternalCommand::constructDocument(
const FilesystemContext& fsContext,
std::string command,
boost::optional<std::string> input
) const {
namespace bp = boost::process;
DomDocumentCache::document_ptr domDocument{
DomDocumentCache::createDocument("content")};
ResultNodeFacade result(domDocument.get(), "command");
try {
bp::ipstream commandOutput;
bp::opstream commandInput;
bp::child commandProcess{
command,
bp::start_dir = boost::filesystem::canonical(fsContext.getBase().parent_path()),
bp::std_out = commandOutput,
bp::std_in = commandInput
};
if ( input ) {
commandInput << *input;
commandInput.flush();
}
commandInput.pipe().close();
std::unique_ptr<std::stringstream> outputStream{
readOutput(commandOutput)};
commandProcess.wait();
result.setAttribute("executed", command);
result.setAttribute("code", std::to_string(commandProcess.exit_code()));
if ( boost::optional<xercesc::DOMNode*> documentElement{
importDocumentElement(outputStream.get(), domDocument.get())
} ) {
if ( isWrappedOutput((*documentElement)->getNodeName()) ) {
result.setContent(
(*documentElement)->getChildNodes()
);
} else {
result.setContent(*documentElement);
}
result.setAttribute("result", "success");
} else {
result.setAttribute("result", "error");
}
}
catch ( const std::system_error& exception ) {
result.setAttribute("result", "error");
}
catch ( const xercesc::DOMException& exception ) {
result.setAttribute("result", "error");
result.setValueNode(
"error",
*XercesStringGuard<char>(exception.msg)
);
}
return domDocument;
}
}
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