After successfully compress the folder, here is my situation :
If append = true and overWrite = false I have to check whether if the target zip file exists or not if existed I will check the existed zip file which files it doesn't contain and append new file from the source folder to it.
My question is:
How can I open the zip file and put it to the compress object? or which others library in Poco should I use to open zip stream? I'm trying to use std::ifstream but Poco::zip::Compress doesn't seem to receive an std::ifstream
I surely have to modify the Poco source code itself to match with my requirement. Thanks in advance.
void ZipFile(string source, string target, List extensions, bool append, bool overWrite)
{
Poco::File tempFile(source);
if (tempFile.exists())
{
if (Poco::File(target).exists() && append && !overWrite) {
fs::path targetPath = fs::path(target);
std::ifstream targetFileStream(targetPath.string(), std::ios::binary);
std::ofstream outStream(target, ios::binary);
CompressEx compress(outStream, false, false);
if (tempFile.isDirectory())
{
Poco::Path sourceDir(source);
sourceDir.makeDirectory();
compress.addRecursive(sourceDir, Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
Poco::Zip::ZipCommon::CL_NORMAL, false);
}
else if (tempFile.isFile())
{
Poco::Path path(tempFile.path());
compress.addFile(path, path.getFileName(), Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
Poco::Zip::ZipCommon::CL_NORMAL);
}
compress.close(); // MUST be done to finalize the Zip file
outStream.close();
}
}
No need to modify the Poco source code. Poco allows you to get the contents of an archive and add files to it.
First, open the target archive to check which files are already in there:
Poco::ZipArchive archive(targetFileStream);
Then collect all files you want to add, that are not in the archive, yet:
std::vector<fs::path> files;
if (fs::is_directory(source)) {
for(auto &entry : fs::recursive_directory_iterator())
// if entry is file and not in zip
if (fs::is_regular_file(entry)
&& archive.findHeader(fs::relative(entry.path, source)) == archive.headerEnd()) {
files.push_back(entry.path);
}
} else if (fs::is_regular_file(entry)
&& archive.findHeader(source) == archive.headerEnd()) {
files.push_back(source);
}
Finally, add the files to your zip
Poco::Zip::ZipManipulator manipulator(target, false);
for(auto &file : files)
manipulator.addFile(fs::relative(file, source), file,
Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
Poco::Zip::ZipCommon::CL_NORMAL);
I had no opportunity to test this. So try it out and see what needs to be done to make it work.
Related
I am creating a windows service that periodically copies the contents of a folder to an archive. I've searched for archiving libraries and found suggestions to use XZip.
Now I can create a new archive using code like this:
HZIP arch = CreateZip((void*)Archive.c_str(), 0, ZIP_FILENAME);
if (arch == nullptr)
return addLogMessage("Unable to open archive.");
for (const auto& file : std::filesystem::directory_iterator(Directory)) {
const std::wstring filePath = file.path().wstring();
const std::wstring nameInArchive = file.path().filename().wstring();
if (ZipAdd(arch, (TCHAR*)nameInArchive.c_str(), (TCHAR*)filePath.c_str(), 0, ZIP_FILENAME) != ZR_OK) {
std::string what = "Error: Adding '" + std::string(filePath.begin(), filePath.end()) + "' to the archive.";
addLogMessage(what.c_str());
}
}
CloseZip(arch);
I also want to add files to an existing archive. When I run the code below, I get a ZR_ZMODE error from the ZipAdd function, which means tried to mix create / open zip archive:
if (std::filesystem::exists(Archive)) {
HZIP arch = OpenZip((void*)Archive.c_str(), 0, ZIP_FILENAME);
if (arch == nullptr)
return addLogMessage("Unable to re-open existing archive.");
for (const auto& file : std::filesystem::directory_iterator(Directory)) {
const std::wstring filePath = file.path().wstring();
const std::wstring nameInArchive = file.path().filename().wstring();
if (ZipAdd(arch, (TCHAR*)nameInArchive.c_str(), (TCHAR*)filePath.c_str(), 0, ZIP_FILENAME) != ZR_OK) {
std::string what = "Error: Adding '" + std::string(filePath.begin(), filePath.end()) + "' to the archive.";
addLogMessage(what.c_str());
}
}
CloseZip(arch);
}
I assume that in XZip library, I'm not able to add files to the existing archive. Is it true?
EDIT: I've solved the problem with different library, libzip. Now I can add new files to the old archive, and everything works fine. I've posted source code and compiling/linking instruction here.
I am still interested, if there is an option for adding files to the existing archive in XZip library, so I will not close the question for now.
After successfully compress the zip file, I want to add extensions list in order to only zip any files that have extensions within the Extensions List.
set <string> extensionsSet;
std::ofstream fos(target, ios::binary);
Poco::Zip::Compress c(fos, true);
extensionsSet.insert("txt");
c.setStoreExtensions(extensionsSet);//set extensions List
set <string> a = c.getStoreExtensions();//a contains 1 string which is txt
Poco::File aFile(source);
if (aFile.exists())
{
if (aFile.isDirectory())
{
Poco::Path sourceDir(source);
sourceDir.makeDirectory();
c.addRecursive(sourceDir, Poco::Zip::ZipCommon::CompressionMethod::CM_DEFLATE,
Poco::Zip::ZipCommon::CL_NORMAL, false);
}
else if (aFile.isFile())
{
Poco::Path p(aFile.path());
c.addFile(p, p.getFileName(), Poco::Zip::ZipCommon::CompressionMethod::CM_AUTO,
Poco::Zip::ZipCommon::CL_NORMAL);
}
}
else {
_log.EndMethod();
throw new FileNotFoundException("File Not Found");
}
c.close(); // MUST be done to finalize the Zip file
fos.close();
Can anyone help me to find out what's wrong within my code, because I don't see any difference when I set the extensions List? I want to zip a file(e.g test.txt), following my code should "test.txt" be included in the zip file?
I want to read a xml file or text file in zip archive without extracting it from the archive. Can I do it directly without extracting it from the zip archive?
Yes you can, wxZipInputStream should be what you are looking for.
wxZipInputStream zip(in);
while (entry.reset(zip.GetNextEntry()), entry.get() != NULL) {
wxString name = entry->GetName();
name = strPageName.BeforeLast('\\') + wxFileName::GetPathSeparator() + name;
zip.OpenEntry(*entry.get());
wxFileOutputStream file(name);
if (!file) {
wxLogError(_T("Can not create file '") + name + _T("'."));
break;
}
zip.Read(file);
I tried using wxZipInputStream. Yes, I can read files after extracting from the archive. I like to know whether I can read those files without extracting from the zip archive.
wxFileSystem::AddHandler(new wxZipFSHandler);
wxFileSystem fs;
wxFSFile *zip = fs.OpenFile( "d:\\test.zip#zip:test.txt");
if(zip!=NULL)
{
wxInputStream *in = zip->GetStream();
if ( in != NULL )
{
wxFileOutputStream out( "d:\\testout.txt" );
out.Write(*in);
out.Close();
}
delete zip;
}
Yes, we can read the zip file directly from the archive. The above is the sample code.
I'm trying to rename the entries of an archive using the libarchive library.
In particular I'm using the function archive_entry_set_pathname.
Files and empty directories are correctly renamed, but unfortunately this is not working if a directory is not empty: instead of being renamed, a new empty directory with the new name is created as sibling of the target directory, which has the old name.
Relevant code snippet:
...
while (archive_read_next_header(inputArchive, &entry) == ARCHIVE_OK) {
if (file == QFile::decodeName(archive_entry_pathname(entry))) {
// FIXME: not working with non-empty directories
archive_entry_set_pathname(entry, QFile::encodeName(newPath));
}
int header_response;
if ((header_response = archive_write_header(outputArchive, entry)) == ARCHIVE_OK) {
... // write the (new) outputArchive on disk
}
}
What's wrong with non-empty directories?
In an archive, the files are stored with their full path names relative to the root of the archive. Your code only matches the directory entry, you also need to match all entries below that directory and rename them. I'm no Qt expert and I haven't tried this code, but you will get the idea.
QStringLiteral oldPath("foo/");
QStringLiteral newPath("bar/");
while (archive_read_next_header(inputArchive, &entry) == ARCHIVE_OK) {
QString arEntryPath = QFile::decodeName(archive_entry_pathname(entry));
if(arEntryPath.startsWith(oldPath) {
arEntryPath.replace(0, oldPath.length(), newPath);
archive_entry_set_pathname(entry, QFile::encodeName(arEntryPath));
}
int header_response;
if ((header_response = archive_write_header(outputArchive, entry)) == ARCHIVE_OK) {
... // write the (new) outputArchive on disk
}
}
I'm using the following code, using the SharpZipLib library, to add files to a .zip file, but each file is being stored with its full path. I need to only store the file, in the 'root' of the .zip file.
string[] files = Directory.GetFiles(folderPath);
using (ZipFile zipFile = ZipFile.Create(zipFilePath))
{
zipFile.BeginUpdate();
foreach (string file in files)
{
zipFile.Add(file);
}
zipFile.CommitUpdate();
}
I can't find anything about an option for this in the supplied documentation. As this is a very popular library, I hope someone reading this may know something.
My solution was to set the NameTransform object property of the ZipFile to a ZipNameTransform with its TrimPrefix set to the directory of the file. This causes the directory part of the entry names, which are full file paths, to be removed.
public static void ZipFolderContents(string folderPath, string zipFilePath)
{
string[] files = Directory.GetFiles(folderPath);
using (ZipFile zipFile = ZipFile.Create(zipFilePath))
{
zipFile.NameTransform = new ZipNameTransform(folderPath);
foreach (string file in files)
{
zipFile.BeginUpdate();
zipFile.Add(file);
zipFile.CommitUpdate();
}
}
}
What's cool is the the NameTransform property is of type INameTransform, allowing customisation of the name transforms.
How about using System.IO.Path.GetFileName() combined with the entryName parameter of ZipFile.Add()?
string[] files = Directory.GetFiles(folderPath);
using (ZipFile zipFile = ZipFile.Create(zipFilePath))
{
zipFile.BeginUpdate();
foreach (string file in files)
{
zipFile.Add(file, System.IO.Path.GetFileName(file));
}
zipFile.CommitUpdate();
}
The MSDN entry for Directory.GetFiles() states that The returned file names are appended to the supplied path parameter. (http://msdn.microsoft.com/en-us/library/07wt70x2.aspx), so the strings you are passing to zipFile.Add() contain the path.
According to the SharpZipLib documentation, there is an overload of the Add method,
public void Add(string fileName, string entryName)
Parameters:
fileName(String) The name of the file to add.
entryName (String) The name to use for the ZipEntry on the Zip file created.
Try this approach:
string[] files = Directory.GetFiles(folderPath);
using (ZipFile zipFile = ZipFile.Create(zipFilePath))
{
zipFile.BeginUpdate();
foreach (string file in files)
{
zipFile.Add(file, Path.GetFileName(file));
}
zipFile.CommitUpdate();
}