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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) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#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
XmlDoc xmlAccess::loadXmlDocument(const Zstring& filename) //throw FfsXmlError
{
std::string stream;
try
{
FileInput inputFile(filename); //throw FileError
{
//quick test whether input is an XML: avoid loading large binary files up front!
const std::string xmlBegin = "<?xml version=";
stream.resize(strLength(zen::BYTE_ORDER_MARK_UTF8) + xmlBegin.size());
const size_t bytesRead = inputFile.read(&stream[0], stream.size()); //throw FileError
stream.resize(bytesRead);
if (!startsWith(stream, xmlBegin) &&
!startsWith(stream, zen::BYTE_ORDER_MARK_UTF8 + xmlBegin)) //respect BOM!
throw FfsXmlError(replaceCpy(_("File %x does not contain a valid configuration."), L"%x", fmtFileName(filename)));
}
const size_t blockSize = 128 * 1024;
do
{
stream.resize(stream.size() + blockSize);
const size_t bytesRead = inputFile.read(&*stream.begin() + stream.size() - blockSize, blockSize); //throw FileError
if (bytesRead < blockSize)
stream.resize(stream.size() - (blockSize - bytesRead)); //caveat: unsigned arithmetics
}
while (!inputFile.eof());
}
catch (const FileError& error)
{
throw FfsXmlError(error.toString());
}
try
{
return zen::parse(stream); //throw XmlParsingError
}
catch (const XmlParsingError& e)
{
throw FfsXmlError(
replaceCpy(replaceCpy(replaceCpy(_("Error parsing file %x, row %y, column %z."),
L"%x", fmtFileName(filename)),
L"%y", numberTo<std::wstring>(e.row + 1)),
L"%z", numberTo<std::wstring>(e.col + 1)));
}
}
const std::wstring xmlAccess::getErrorMessageFormatted(const std::vector<std::wstring>& failedElements)
{
std::wstring msg;
if (!failedElements.empty())
{
msg = _("Cannot read the following XML elements:") + L"\n";
std::for_each(failedElements.begin(), failedElements.end(), [&](const std::wstring& elem) { msg += L"\n" + elem; });
}
return msg;
}
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.toString());
}
}
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