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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/zlib/google/zip.h"
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/files/file.h"
#include "base/files/file_enumerator.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "third_party/zlib/google/zip_internal.h"
#include "third_party/zlib/google/zip_reader.h"
#include "third_party/zlib/google/zip_writer.h"
namespace zip {
namespace {
bool IsHiddenFile(const base::FilePath& file_path) {
return file_path.BaseName().value()[0] == '.';
}
bool ExcludeNoFilesFilter(const base::FilePath& file_path) {
return true;
}
// Creates a directory at |extract_dir|/|entry_path|, including any parents.
bool CreateDirectory(const base::FilePath& extract_dir,
const base::FilePath& entry_path) {
return base::CreateDirectory(extract_dir.Append(entry_path));
}
// Creates a WriterDelegate that can write a file at |extract_dir|/|entry_path|.
std::unique_ptr<WriterDelegate> CreateFilePathWriterDelegate(
const base::FilePath& extract_dir,
const base::FilePath& entry_path) {
return std::make_unique<FilePathWriterDelegate>(
extract_dir.Append(entry_path));
}
class DirectFileAccessor : public FileAccessor {
public:
explicit DirectFileAccessor(base::FilePath src_dir)
: src_dir_(std::move(src_dir)) {}
~DirectFileAccessor() override = default;
bool Open(const Paths paths, std::vector<base::File>* const files) override {
DCHECK(files);
files->reserve(files->size() + paths.size());
for (const base::FilePath& path : paths) {
DCHECK(!path.IsAbsolute());
const base::FilePath absolute_path = src_dir_.Append(path);
if (base::DirectoryExists(absolute_path)) {
files->emplace_back();
LOG(ERROR) << "Cannot open '" << path << "': It is a directory";
} else {
files->emplace_back(absolute_path,
base::File::FLAG_OPEN | base::File::FLAG_READ);
LOG_IF(ERROR, !files->back().IsValid())
<< "Cannot open '" << path << "'";
}
}
return true;
}
bool List(const base::FilePath& path,
std::vector<base::FilePath>* const files,
std::vector<base::FilePath>* const subdirs) override {
DCHECK(!path.IsAbsolute());
DCHECK(files);
DCHECK(subdirs);
base::FileEnumerator file_enumerator(
src_dir_.Append(path), false /* recursive */,
base::FileEnumerator::FILES | base::FileEnumerator::DIRECTORIES);
while (!file_enumerator.Next().empty()) {
const base::FileEnumerator::FileInfo info = file_enumerator.GetInfo();
(info.IsDirectory() ? subdirs : files)
->push_back(path.Append(info.GetName()));
}
return true;
}
bool GetInfo(const base::FilePath& path, Info* const info) override {
DCHECK(!path.IsAbsolute());
DCHECK(info);
base::File::Info file_info;
if (!base::GetFileInfo(src_dir_.Append(path), &file_info)) {
LOG(ERROR) << "Cannot get info of '" << path << "'";
return false;
}
info->is_directory = file_info.is_directory;
info->last_modified = file_info.last_modified;
return true;
}
private:
const base::FilePath src_dir_;
};
} // namespace
std::ostream& operator<<(std::ostream& out, const Progress& progress) {
return out << progress.bytes << " bytes, " << progress.files << " files, "
<< progress.directories << " dirs";
}
bool Zip(const ZipParams& params) {
DirectFileAccessor default_accessor(params.src_dir);
FileAccessor* const file_accessor = params.file_accessor ?: &default_accessor;
std::unique_ptr<internal::ZipWriter> zip_writer;
#if defined(OS_POSIX)
if (params.dest_fd != base::kInvalidPlatformFile) {
DCHECK(params.dest_file.empty());
zip_writer =
internal::ZipWriter::CreateWithFd(params.dest_fd, file_accessor);
if (!zip_writer)
return false;
}
#endif
if (!zip_writer) {
zip_writer = internal::ZipWriter::Create(params.dest_file, file_accessor);
if (!zip_writer)
return false;
}
zip_writer->SetProgressCallback(params.progress_callback,
params.progress_period);
zip_writer->SetRecursive(params.recursive);
if (!params.include_hidden_files || params.filter_callback)
zip_writer->SetFilterCallback(base::BindRepeating(
[](const ZipParams* const params, const base::FilePath& path) -> bool {
return (params->include_hidden_files || !IsHiddenFile(path)) &&
(!params->filter_callback ||
params->filter_callback.Run(params->src_dir.Append(path)));
},
¶ms));
if (params.src_files.empty()) {
// No source items are specified. Zip the entire source directory.
zip_writer->SetRecursive(true);
if (!zip_writer->AddDirectoryContents(base::FilePath()))
return false;
} else {
// Only zip the specified source items.
if (!zip_writer->AddMixedEntries(params.src_files))
return false;
}
return zip_writer->Close();
}
bool Unzip(const base::FilePath& src_file, const base::FilePath& dest_dir) {
return UnzipWithFilterCallback(
src_file, dest_dir, base::BindRepeating(&ExcludeNoFilesFilter), true);
}
bool UnzipWithFilterCallback(const base::FilePath& src_file,
const base::FilePath& dest_dir,
FilterCallback filter_cb,
bool log_skipped_files) {
base::File file(src_file, base::File::FLAG_OPEN | base::File::FLAG_READ);
if (!file.IsValid()) {
DLOG(WARNING) << "Cannot open '" << src_file << "'";
return false;
}
return UnzipWithFilterAndWriters(
file.GetPlatformFile(),
base::BindRepeating(&CreateFilePathWriterDelegate, dest_dir),
base::BindRepeating(&CreateDirectory, dest_dir), std::move(filter_cb),
log_skipped_files);
}
bool UnzipWithFilterAndWriters(const base::PlatformFile& src_file,
WriterFactory writer_factory,
DirectoryCreator directory_creator,
FilterCallback filter_cb,
bool log_skipped_files) {
ZipReader reader;
if (!reader.OpenFromPlatformFile(src_file)) {
DLOG(WARNING) << "Cannot open '" << src_file << "'";
return false;
}
while (reader.HasMore()) {
if (!reader.OpenCurrentEntryInZip()) {
DLOG(WARNING) << "Failed to open the current file in zip";
return false;
}
const base::FilePath& entry_path = reader.current_entry_info()->file_path();
if (reader.current_entry_info()->is_unsafe()) {
DLOG(WARNING) << "Found an unsafe file in zip " << entry_path;
return false;
}
if (filter_cb.Run(entry_path)) {
if (reader.current_entry_info()->is_directory()) {
if (!directory_creator.Run(entry_path))
return false;
} else {
std::unique_ptr<WriterDelegate> writer = writer_factory.Run(entry_path);
if (!reader.ExtractCurrentEntry(writer.get(),
std::numeric_limits<uint64_t>::max())) {
DLOG(WARNING) << "Failed to extract " << entry_path;
return false;
}
}
} else if (log_skipped_files) {
DLOG(WARNING) << "Skipped file " << entry_path;
}
if (!reader.AdvanceToNextEntry()) {
DLOG(WARNING) << "Failed to advance to the next file";
return false;
}
}
return true;
}
bool ZipWithFilterCallback(const base::FilePath& src_dir,
const base::FilePath& dest_file,
FilterCallback filter_cb) {
DCHECK(base::DirectoryExists(src_dir));
return Zip({.src_dir = src_dir,
.dest_file = dest_file,
.filter_callback = std::move(filter_cb)});
}
bool Zip(const base::FilePath& src_dir,
const base::FilePath& dest_file,
bool include_hidden_files) {
return Zip({.src_dir = src_dir,
.dest_file = dest_file,
.include_hidden_files = include_hidden_files});
}
#if defined(OS_POSIX)
bool ZipFiles(const base::FilePath& src_dir,
Paths src_relative_paths,
int dest_fd) {
DCHECK(base::DirectoryExists(src_dir));
return Zip({.src_dir = src_dir,
.dest_fd = dest_fd,
.src_files = src_relative_paths});
}
#endif // defined(OS_POSIX)
} // namespace zip
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