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ZipManipulator.cpp
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//
// ZipManipulator.cpp
//
// Library: Zip
// Package: Manipulation
// Module: ZipManipulator
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Zip/ZipManipulator.h"
#include "Poco/Zip/ZipException.h"
#include "Poco/Zip/ZipUtil.h"
#include "Poco/Zip/Add.h"
#include "Poco/Zip/Delete.h"
#include "Poco/Zip/Keep.h"
#include "Poco/Zip/Rename.h"
#include "Poco/Zip/Replace.h"
#include "Poco/Zip/Compress.h"
#include "Poco/Delegate.h"
#include "Poco/File.h"
#include "Poco/FileStream.h"
namespace Poco {
namespace Zip {
ZipManipulator::ZipManipulator(const std::string& zipFile, bool backupOriginalFile):
_zipFile(zipFile),
_backupOriginalFile(backupOriginalFile),
_changes(),
_in(0)
{
Poco::FileInputStream in(zipFile);
_in = new ZipArchive(in);
}
ZipManipulator::~ZipManipulator()
{
}
void ZipManipulator::deleteFile(const std::string& zipPath)
{
const ZipLocalFileHeader& entry = getForChange(zipPath);
addOperation(zipPath, new Delete(entry));
}
void ZipManipulator::replaceFile(const std::string& zipPath, const std::string& localPath)
{
const ZipLocalFileHeader& entry = getForChange(zipPath);
addOperation(zipPath, new Replace(entry, localPath));
}
void ZipManipulator::renameFile(const std::string& zipPath, const std::string& newZipPath)
{
const ZipLocalFileHeader& entry = getForChange(zipPath);
// checked later in Compress too but the earlier one gets the error the better
std::string fn = ZipUtil::validZipEntryFileName(newZipPath);
addOperation(zipPath, new Rename(entry, fn));
}
void ZipManipulator::addFile(const std::string& zipPath, const std::string& localPath, ZipCommon::CompressionMethod cm, ZipCommon::CompressionLevel cl)
{
addOperation(zipPath, new Add(zipPath, localPath, cm, cl));
}
ZipArchive ZipManipulator::commit()
{
// write to a tmp file
std::string outFile(_zipFile + ".tmp");
ZipArchive retVal(compress(outFile));
//renaming
{
Poco::File aFile(_zipFile);
if (_backupOriginalFile)
{
Poco::File tmp(_zipFile+".bak");
if (tmp.exists())
tmp.remove();
aFile.renameTo(_zipFile+".bak");
}
else
aFile.remove();
}
{
Poco::File resFile(outFile);
Poco::File zipFile(_zipFile);
if (zipFile.exists())
zipFile.remove();
resFile.renameTo(_zipFile);
}
return retVal;
}
const ZipLocalFileHeader& ZipManipulator::getForChange(const std::string& zipPath) const
{
ZipArchive::FileHeaders::const_iterator it = _in->findHeader(zipPath);
if (it == _in->headerEnd())
throw ZipManipulationException("Entry not found: " + zipPath);
if (_changes.find(zipPath) != _changes.end())
throw ZipManipulationException("A change request exists already for entry " + zipPath);
return it->second;
}
void ZipManipulator::addOperation(const std::string& zipPath, ZipOperation::Ptr ptrOp)
{
std::pair<Changes::iterator, bool> result = _changes.insert(std::make_pair(zipPath, ptrOp));
if (!result.second)
throw ZipManipulationException("A change request exists already for entry " + zipPath);
}
void ZipManipulator::onEDone(const void*, const ZipLocalFileHeader& hdr)
{
EDone(this, hdr);
}
ZipArchive ZipManipulator::compress(const std::string& outFile)
{
// write to a tmp file
Poco::FileInputStream in(_zipFile);
Poco::FileOutputStream out(outFile);
Compress c(out, true);
c.EDone += Poco::Delegate<ZipManipulator, const ZipLocalFileHeader>(this, &ZipManipulator::onEDone);
ZipArchive::FileHeaders::const_iterator it = _in->headerBegin();
for (; it != _in->headerEnd(); ++it)
{
Changes::iterator itC = _changes.find(it->first);
if (itC != _changes.end())
{
itC->second->execute(c, in);
_changes.erase(itC);
}
else
{
Keep k(it->second);
k.execute(c, in);
}
}
//Remaining files are add operations!
Changes::iterator itC = _changes.begin();
for (; itC != _changes.end(); ++itC)
{
itC->second->execute(c, in);
}
_changes.clear();
c.EDone -= Poco::Delegate<ZipManipulator, const ZipLocalFileHeader>(this, &ZipManipulator::onEDone);
in.close();
return c.close();
}
} } // namespace Poco::Zip