0
我有一個使用deflate方法將文件壓縮成一個zip文件的另一個應用程序(用Java編寫)創建的zip文件,我證實「最後修改」等信息未修改爲當前日期,並在使用Ubuntu的默認歸檔管理器進行解壓縮時保持不變。解壓縮libzip會丟失文件元數據
但是,使用libzip解壓縮會丟失該數據。有什麼辦法可以避免這種行爲,或者其他保證元數據持久性的庫?
解壓縮代碼:
void decompress_zip(const std::string& zip, const std::string& out_dir, std::function<void(const std::string&)> fileListener) {
std::string finput = zip;
std::string foutput = out_dir;
if(!boost::filesystem::create_directories(foutput) && !fileExists(foutput))
throw "Failed to create directory for unzipping";
foutput += "/tmp.zip";
if (rename(finput.c_str(), foutput.c_str()))
throw "Failed to move zip to new dir";
finput = foutput;
struct zip *za;
struct zip_file *zf;
struct zip_stat sb;
char buf[100];
int err;
int i, len;
int fd;
long long sum;
if ((za = zip_open(finput.c_str(), 0, &err)) == NULL) {
zip_error_to_str(buf, sizeof(buf), err, errno);
throw "can't open zip! (" + finput + ")";
}
for (i = 0; i < zip_get_num_entries(za, 0); i++) {
if (zip_stat_index(za, i, 0, &sb) == 0) {
len = strlen(sb.name);
if (sb.name[len - 1] == '/') {
safe_create_dir(sb.name);
} else {
zf = zip_fopen_index(za, i, 0);
if (!zf) {
throw "failed to open file in zip! Probably corrupted!!!";
}
std::string cFile = out_dir + "/" + std::string(sb.name);
fd = open(cFile.c_str(), O_RDWR | O_TRUNC | O_CREAT, 0644);
if (fd < 0) {
throw "failed to create output file!";
}
sum = 0;
while (sum != sb.size) {
len = zip_fread(zf, buf, 100);
if (len < 0) {
throw "failed to read file in zip!";
}
write(fd, buf, len);
sum += len;
}
close(fd);
zip_fclose(zf);
fileListener(cFile);
}
}
}
if (zip_close(za) == -1) {
throw "Failed to close zip archive! " + finput;
}
if (std::remove(foutput.c_str()))
throw "Failed to remove temporary zip file! " + foutput;
}
由於沒有其他答案,我花了整整一天的時間進行研究,所以我擔心你是對的,並會將你的答案標記爲正確答案。 –