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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/strings/string16.h"
#include "base/strings/string_util.h"
#include "third_party/zlib/google/zip_internal.h"
#include "third_party/zlib/google/zip_reader.h"
#if defined(USE_SYSTEM_MINIZIP)
#include <minizip/unzip.h>
#include <minizip/zip.h>
#else
#include "third_party/zlib/contrib/minizip/unzip.h"
#include "third_party/zlib/contrib/minizip/zip.h"
#endif
namespace {
bool AddFileToZip(zipFile zip_file, const base::FilePath& src_dir) {
base::File file(src_dir, base::File::FLAG_OPEN | base::File::FLAG_READ);
if (!file.IsValid()) {
DLOG(ERROR) << "Could not open file for path " << src_dir.value();
return false;
}
int num_bytes;
char buf[zip::internal::kZipBufSize];
do {
num_bytes = file.ReadAtCurrentPos(buf, zip::internal::kZipBufSize);
if (num_bytes > 0) {
if (ZIP_OK != zipWriteInFileInZip(zip_file, buf, num_bytes)) {
DLOG(ERROR) << "Could not write data to zip for path "
<< src_dir.value();
return false;
}
}
} while (num_bytes > 0);
return true;
}
bool AddEntryToZip(zipFile zip_file, const base::FilePath& path,
const base::FilePath& root_path) {
base::FilePath relative_path;
bool result = root_path.AppendRelativePath(path, &relative_path);
DCHECK(result);
std::string str_path = relative_path.AsUTF8Unsafe();
#if defined(OS_WIN)
ReplaceSubstringsAfterOffset(&str_path, 0u, "\\", "/");
#endif
bool is_directory = base::DirectoryExists(path);
if (is_directory)
str_path += "/";
zip_fileinfo file_info = zip::internal::GetFileInfoForZipping(path);
if (!zip::internal::ZipOpenNewFileInZip(zip_file, str_path, &file_info))
return false;
bool success = true;
if (!is_directory) {
success = AddFileToZip(zip_file, path);
}
if (ZIP_OK != zipCloseFileInZip(zip_file)) {
DLOG(ERROR) << "Could not close zip file entry " << str_path;
return false;
}
return success;
}
bool ExcludeNoFilesFilter(const base::FilePath& file_path) {
return true;
}
bool ExcludeHiddenFilesFilter(const base::FilePath& file_path) {
return file_path.BaseName().value()[0] != '.';
}
} // namespace
namespace zip {
bool Unzip(const base::FilePath& src_file, const base::FilePath& dest_dir) {
ZipReader reader;
if (!reader.Open(src_file)) {
DLOG(WARNING) << "Failed to open " << src_file.value();
return false;
}
while (reader.HasMore()) {
if (!reader.OpenCurrentEntryInZip()) {
DLOG(WARNING) << "Failed to open the current file in zip";
return false;
}
if (reader.current_entry_info()->is_unsafe()) {
DLOG(WARNING) << "Found an unsafe file in zip "
<< reader.current_entry_info()->file_path().value();
return false;
}
if (!reader.ExtractCurrentEntryIntoDirectory(dest_dir)) {
DLOG(WARNING) << "Failed to extract "
<< reader.current_entry_info()->file_path().value();
return false;
}
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,
const FilterCallback& filter_cb) {
DCHECK(base::DirectoryExists(src_dir));
zipFile zip_file = internal::OpenForZipping(dest_file.AsUTF8Unsafe(),
APPEND_STATUS_CREATE);
if (!zip_file) {
DLOG(WARNING) << "couldn't create file " << dest_file.value();
return false;
}
bool success = true;
base::FileEnumerator file_enumerator(src_dir, true /* recursive */,
base::FileEnumerator::FILES | base::FileEnumerator::DIRECTORIES);
for (base::FilePath path = file_enumerator.Next(); !path.value().empty();
path = file_enumerator.Next()) {
if (!filter_cb.Run(path)) {
continue;
}
if (!AddEntryToZip(zip_file, path, src_dir)) {
success = false;
break;
}
}
if (ZIP_OK != zipClose(zip_file, NULL)) {
DLOG(ERROR) << "Error closing zip file " << dest_file.value();
return false;
}
return success;
}
bool Zip(const base::FilePath& src_dir, const base::FilePath& dest_file,
bool include_hidden_files) {
if (include_hidden_files) {
return ZipWithFilterCallback(
src_dir, dest_file, base::Bind(&ExcludeNoFilesFilter));
} else {
return ZipWithFilterCallback(
src_dir, dest_file, base::Bind(&ExcludeHiddenFilesFilter));
}
}
#if defined(OS_POSIX)
bool ZipFiles(const base::FilePath& src_dir,
const std::vector<base::FilePath>& src_relative_paths,
int dest_fd) {
DCHECK(base::DirectoryExists(src_dir));
zipFile zip_file = internal::OpenFdForZipping(dest_fd, APPEND_STATUS_CREATE);
if (!zip_file) {
DLOG(ERROR) << "couldn't create file for fd " << dest_fd;
return false;
}
bool success = true;
for (std::vector<base::FilePath>::const_iterator iter =
src_relative_paths.begin();
iter != src_relative_paths.end(); ++iter) {
const base::FilePath& path = src_dir.Append(*iter);
if (!AddEntryToZip(zip_file, path, src_dir)) {
// TODO(hshi): clean up the partial zip file when error occurs.
success = false;
break;
}
}
if (ZIP_OK != zipClose(zip_file, NULL)) {
DLOG(ERROR) << "Error closing zip file for fd " << dest_fd;
success = false;
}
return success;
}
#endif // defined(OS_POSIX)
} // namespace zip
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