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// Copyright (c) 2011 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 "chrome/common/zip.h"
#include "base/bind.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/string16.h"
#include "base/string_util.h"
#include "chrome/common/zip_internal.h"
#include "chrome/common/zip_reader.h"
#include "net/base/file_stream.h"
#include "third_party/zlib/contrib/minizip/unzip.h"
#include "third_party/zlib/contrib/minizip/zip.h"
namespace {
bool AddFileToZip(zipFile zip_file, const FilePath& src_dir) {
net::FileStream stream;
int flags = base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ;
if (stream.Open(src_dir, flags) != 0) {
DLOG(ERROR) << "Could not open stream for path "
<< src_dir.value();
return false;
}
int num_bytes;
char buf[zip::internal::kZipBufSize];
do {
num_bytes = stream.Read(buf, zip::internal::kZipBufSize,
net::CompletionCallback());
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 FilePath& path,
const FilePath& root_path) {
std::string str_path =
path.AsUTF8Unsafe().substr(root_path.value().length() + 1);
#if defined(OS_WIN)
ReplaceSubstringsAfterOffset(&str_path, 0u, "\\", "/");
#endif
bool is_directory = file_util::DirectoryExists(path);
if (is_directory)
str_path += "/";
if (ZIP_OK != zipOpenNewFileInZip(
zip_file, str_path.c_str(),
NULL, NULL, 0u, NULL, 0u, NULL, // file info, extrafield local, length,
// extrafield global, length, comment
Z_DEFLATED, Z_DEFAULT_COMPRESSION)) {
DLOG(ERROR) << "Could not open zip file entry " << str_path;
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 FilePath& file_path) {
return true;
}
bool ExcludeHiddenFilesFilter(const FilePath& file_path) {
return file_path.BaseName().value()[0] != '.';
}
} // namespace
namespace zip {
bool Unzip(const FilePath& src_file, const 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 FilePath& src_dir, const FilePath& dest_file,
const FilterCallback& filter_cb) {
DCHECK(file_util::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;
file_util::FileEnumerator file_enumerator(
src_dir, true, // recursive
static_cast<file_util::FileEnumerator::FileType>(
file_util::FileEnumerator::FILES |
file_util::FileEnumerator::DIRECTORIES));
for (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;
return false;
}
}
if (ZIP_OK != zipClose(zip_file, NULL)) { // global comment
DLOG(ERROR) << "Error closing zip file " << dest_file.value();
return false;
}
return success;
}
bool Zip(const FilePath& src_dir, const 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));
}
}
} // namespace zip
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