ArchiveWriter.cc
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/*
* ArchiveWriter.cc
*
* Created on: 26 sept. 2013
* Author: CS
*/
#include "ArchiveWriter.hh"
#include "archive.h"
#include <archive.h>
#include <archive_entry.h>
#include <boost/filesystem.hpp>
#include <boost/scope_exit.hpp>
#include <boost/filesystem/path.hpp>
#include <stdexcept>
#include <fstream>
#include <sstream>
#include <sys/stat.h>
namespace postprocessing {
log4cxx::LoggerPtr ArchiveWriter::_logger = log4cxx::Logger::getLogger(
"AMDA-Kernel.ArchiveWriter");
ArchiveWriter::ArchiveWriter(const std::string& pArchiveFileName,
const Formats& pFormat) :
_open(true), _archive(archive_write_new()), _entry(archive_entry_new()), _archiveFileName(
pArchiveFileName), _format(pFormat) {
switch (pFormat) {
case TAR:
checkError(archive_write_set_format_gnutar(_archive), true);
break;
case ZIP:
checkError(archive_write_set_format_zip(_archive), true);
break;
}
checkError(archive_write_open_filename(_archive, pArchiveFileName.c_str()),
true);
}
ArchiveWriter::~ArchiveWriter() {
close();
}
void ArchiveWriter::checkError(const int pErrCode,
const bool pCloseBeforeThrow) {
if (pCloseBeforeThrow && pErrCode == ARCHIVE_FATAL)
close();
if (pErrCode != ARCHIVE_OK && pErrCode != ARCHIVE_WARN)
throw std::runtime_error(archive_error_string(_archive));
}
void ArchiveWriter::addHeader(const std::string& pFilePath,
const std::string& pEntryName) {
struct archive* a = archive_read_disk_new();
BOOST_SCOPE_EXIT(&a) {
if (a != NULL) {
archive_read_close(a);
archive_read_free(a);
}
}
BOOST_SCOPE_EXIT_END
_entry = archive_entry_clear(_entry);
archive_entry_set_pathname(_entry, pEntryName.c_str());
archive_entry_copy_sourcepath(_entry, pFilePath.c_str());
checkError(archive_read_disk_entry_from_file(a, _entry, -1, 0));
checkError(archive_write_header(_archive, _entry));
}
void ArchiveWriter::addFinish() {
archive_write_finish_entry(_archive);
}
void ArchiveWriter::addFile(const std::string& pFilePath,
const std::string& pEntryName) {
if (boost::filesystem::exists(pFilePath)) {
boost::filesystem::file_status file_stat = boost::filesystem::status(
pFilePath);
addHeader(pFilePath, pEntryName.empty() ? pFilePath : pEntryName);
if (file_stat.type() == boost::filesystem::regular_file) {
std::fstream entry_file(pFilePath.c_str(), std::ios::in);
char buff[8192];
while (entry_file.good()) {
entry_file.read(buff, 8192);
archive_write_data(_archive, buff,
static_cast<size_t>(entry_file.gcount()));
}
entry_file.close();
} else
throw std::runtime_error("Entry file type not yet supported.");
addFinish();
} else
throw std::runtime_error("Entry file not found.");
}
void ArchiveWriter::close() {
if (_open) {
if (_archive != NULL) {
archive_write_close(_archive);
archive_write_free(_archive);
LOG4CXX_INFO(_logger, "Written archive " + _archiveFileName);
}
if (_entry != NULL)
archive_entry_free(_entry);
_open = false;
}
}
std::string ArchiveWriter::createArchive(const Formats& pFormat,
const std::string& pExtension, const std::vector<std::string>& pFiles,
const std::string& pPrefix, const std::string& pOutDir) {
if (pFiles.empty()) {
LOG4CXX_WARN(_logger, "No file to archive or compress.");
return std::string();
}
// calculate out file name (timestamp)
std::ostringstream archiveFileName;
if (!pPrefix.empty()) {
archiveFileName << pPrefix << "_";
}
archiveFileName << std::time(0) << pExtension;
std::string archiveCompletePath;
// calculate out file path
if (!pOutDir.empty()) {
// user path
archiveCompletePath = pOutDir + "/" + archiveFileName.str();
} else {
// default path is first file parent path
std::string firstFile = pFiles.front();
if(boost::filesystem::path(firstFile).parent_path().string().empty()){
archiveCompletePath = archiveFileName.str();
}
else {
archiveCompletePath =
boost::filesystem::path(firstFile).parent_path().string()
+ "/" + archiveFileName.str();
}
}
// create archive
ArchiveWriter writer(archiveCompletePath, pFormat);
// add each file to the archive
for (auto file : pFiles) {
// Remove "./" at the begining of the filename
if (file.compare (0, 2, "./") == 0)
file = file.substr(2);
boost::filesystem::path path(file);
writer.addFile(file, path.c_str());
boost::filesystem::remove(path);
}
// close the archive
writer.close();
return archiveCompletePath;
}
} /* namespace postprocessing */