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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
#include "xml_base.h"
#include <zen/file_handling.h>
#include <zen/file_io.h>
using namespace zen;
//loadXmlDocument vs loadStream:
//1. better error reporting
//2. quick exit if (potentially large) input file is not an XML
void xmlAccess::loadXmlDocument(const Zstring& filename, XmlDoc& doc) //throw FfsXmlError
{
std::string stream;
try
{
{
//quick test whether input is an XML: avoid loading large binary files up front!
const std::string xmlBegin = "<?xml version=";
std::vector<char> buffer(xmlBegin.size() + sizeof(zen::BYTE_ORDER_MARK_UTF8));
FileInput inputFile(filename); //throw FileError;
const size_t bytesRead = inputFile.read(&buffer[0], buffer.size()); //throw FileError
const std::string fileBegin(&buffer[0], bytesRead);
if (!startsWith(fileBegin, xmlBegin) &&
!startsWith(fileBegin, zen::BYTE_ORDER_MARK_UTF8 + xmlBegin)) //respect BOM!
throw FfsXmlError(_("Error parsing configuration file:") + "\n\"" + filename + "\"");
}
const zen::UInt64 fs = zen::getFilesize(filename); //throw FileError
stream.resize(to<size_t>(fs));
FileInput inputFile(filename); //throw FileError
const size_t bytesRead = inputFile.read(&stream[0], stream.size()); //throw FileError
if (bytesRead < to<size_t>(fs))
throw FfsXmlError(_("Error reading file:") + "\n\"" + filename + "\"");
}
catch (const FileError& error)
{
if (!fileExists(filename))
throw FfsXmlError(_("File does not exist:") + "\n\"" + filename+ "\"");
throw FfsXmlError(error.msg());
}
try
{
zen::parse(stream, doc); //throw XmlParsingError
}
catch (const XmlParsingError&)
{
throw FfsXmlError(_("Error parsing configuration file:") + "\n\"" + filename + "\"");
}
}
const std::wstring xmlAccess::getErrorMessageFormatted(const XmlIn& in)
{
std::wstring errorMessage = _("Could not read values for the following XML nodes:") + "\n";
std::vector<std::wstring> failedNodes = in.getErrorsAs<std::wstring>();
std::for_each(failedNodes.begin(), failedNodes.end(),
[&](const std::wstring& str) { errorMessage += str + L'\n'; });
return errorMessage;
}
void xmlAccess::saveXmlDocument(const zen::XmlDoc& doc, const Zstring& filename) //throw (FfsXmlError)
{
std::string stream = serialize(doc); //throw ()
bool saveNecessary = true;
try
{
if (zen::getFilesize(filename) == stream.size()) //throw FileError
try
{
if (zen::loadStream(filename) == stream) //throw XmlFileError
saveNecessary = false;
}
catch (const zen::XmlFileError&) {}
}
catch (FileError&) {}
if (saveNecessary)
try
{
FileOutput outputFile(filename, FileOutput::ACC_OVERWRITE); //throw FileError
outputFile.write(stream.c_str(), stream.length()); //
}
catch (const FileError& error) //more detailed error messages than with wxWidgets
{
throw FfsXmlError(error.msg());
}
}
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