307 lines
7.9 KiB
C++
307 lines
7.9 KiB
C++
// Copyright (c) 2014 GitHub, Inc.
|
|
// Use of this source code is governed by the MIT license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "atom/common/asar/archive.h"
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "atom/common/asar/scoped_temporary_file.h"
|
|
#include "base/files/file.h"
|
|
#include "base/files/file_util.h"
|
|
#include "base/json/json_reader.h"
|
|
#include "base/logging.h"
|
|
#include "base/pickle.h"
|
|
#include "base/strings/string_number_conversions.h"
|
|
#include "base/values.h"
|
|
|
|
#if defined(OS_WIN)
|
|
#include "atom/node/osfhandle.h"
|
|
#endif
|
|
|
|
namespace asar {
|
|
|
|
namespace {
|
|
|
|
#if defined(OS_WIN)
|
|
const char kSeparators[] = "\\/";
|
|
#else
|
|
const char kSeparators[] = "/";
|
|
#endif
|
|
|
|
bool GetNodeFromPath(std::string path,
|
|
const base::DictionaryValue* root,
|
|
const base::DictionaryValue** out);
|
|
|
|
// Gets the "files" from "dir".
|
|
bool GetFilesNode(const base::DictionaryValue* root,
|
|
const base::DictionaryValue* dir,
|
|
const base::DictionaryValue** out) {
|
|
// Test for symbol linked directory.
|
|
std::string link;
|
|
if (dir->GetStringWithoutPathExpansion("link", &link)) {
|
|
const base::DictionaryValue* linked_node = nullptr;
|
|
if (!GetNodeFromPath(link, root, &linked_node))
|
|
return false;
|
|
dir = linked_node;
|
|
}
|
|
|
|
return dir->GetDictionaryWithoutPathExpansion("files", out);
|
|
}
|
|
|
|
// Gets sub-file "name" from "dir".
|
|
bool GetChildNode(const base::DictionaryValue* root,
|
|
const std::string& name,
|
|
const base::DictionaryValue* dir,
|
|
const base::DictionaryValue** out) {
|
|
if (name == "") {
|
|
*out = root;
|
|
return true;
|
|
}
|
|
|
|
const base::DictionaryValue* files = nullptr;
|
|
return GetFilesNode(root, dir, &files) &&
|
|
files->GetDictionaryWithoutPathExpansion(name, out);
|
|
}
|
|
|
|
// Gets the node of "path" from "root".
|
|
bool GetNodeFromPath(std::string path,
|
|
const base::DictionaryValue* root,
|
|
const base::DictionaryValue** out) {
|
|
if (path == "") {
|
|
*out = root;
|
|
return true;
|
|
}
|
|
|
|
const base::DictionaryValue* dir = root;
|
|
for (size_t delimiter_position = path.find_first_of(kSeparators);
|
|
delimiter_position != std::string::npos;
|
|
delimiter_position = path.find_first_of(kSeparators)) {
|
|
const base::DictionaryValue* child = nullptr;
|
|
if (!GetChildNode(root, path.substr(0, delimiter_position), dir, &child))
|
|
return false;
|
|
|
|
dir = child;
|
|
path.erase(0, delimiter_position + 1);
|
|
}
|
|
|
|
return GetChildNode(root, path, dir, out);
|
|
}
|
|
|
|
bool FillFileInfoWithNode(Archive::FileInfo* info,
|
|
uint32_t header_size,
|
|
const base::DictionaryValue* node) {
|
|
int size;
|
|
if (!node->GetInteger("size", &size))
|
|
return false;
|
|
info->size = static_cast<uint32_t>(size);
|
|
|
|
if (node->GetBoolean("unpacked", &info->unpacked) && info->unpacked)
|
|
return true;
|
|
|
|
std::string offset;
|
|
if (!node->GetString("offset", &offset))
|
|
return false;
|
|
if (!base::StringToUint64(offset, &info->offset))
|
|
return false;
|
|
info->offset += header_size;
|
|
|
|
node->GetBoolean("executable", &info->executable);
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
Archive::Archive(const base::FilePath& path)
|
|
: path_(path),
|
|
file_(path_, base::File::FLAG_OPEN | base::File::FLAG_READ),
|
|
#if defined(OS_WIN)
|
|
fd_(node::open_osfhandle(
|
|
reinterpret_cast<intptr_t>(file_.GetPlatformFile()), 0)),
|
|
#elif defined(OS_POSIX)
|
|
fd_(file_.GetPlatformFile()),
|
|
#else
|
|
fd_(-1),
|
|
#endif
|
|
header_size_(0) {
|
|
}
|
|
|
|
Archive::~Archive() {
|
|
#if defined(OS_WIN)
|
|
if (fd_ != -1) {
|
|
node::close(fd_);
|
|
// Don't close the handle since we already closed the fd.
|
|
file_.TakePlatformFile();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
bool Archive::Init() {
|
|
if (!file_.IsValid()) {
|
|
if (file_.error_details() != base::File::FILE_ERROR_NOT_FOUND) {
|
|
LOG(WARNING) << "Opening " << path_.value()
|
|
<< ": " << base::File::ErrorToString(file_.error_details());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
std::vector<char> buf;
|
|
int len;
|
|
|
|
buf.resize(8);
|
|
len = file_.ReadAtCurrentPos(buf.data(), buf.size());
|
|
if (len != static_cast<int>(buf.size())) {
|
|
PLOG(ERROR) << "Failed to read header size from " << path_.value();
|
|
return false;
|
|
}
|
|
|
|
uint32_t size;
|
|
if (!base::PickleIterator(base::Pickle(buf.data(), buf.size())).ReadUInt32(
|
|
&size)) {
|
|
LOG(ERROR) << "Failed to parse header size from " << path_.value();
|
|
return false;
|
|
}
|
|
|
|
buf.resize(size);
|
|
len = file_.ReadAtCurrentPos(buf.data(), buf.size());
|
|
if (len != static_cast<int>(buf.size())) {
|
|
PLOG(ERROR) << "Failed to read header from " << path_.value();
|
|
return false;
|
|
}
|
|
|
|
std::string header;
|
|
if (!base::PickleIterator(base::Pickle(buf.data(), buf.size())).ReadString(
|
|
&header)) {
|
|
LOG(ERROR) << "Failed to parse header from " << path_.value();
|
|
return false;
|
|
}
|
|
|
|
std::string error;
|
|
base::JSONReader reader;
|
|
std::unique_ptr<base::Value> value(reader.ReadToValue(header));
|
|
if (!value || !value->IsType(base::Value::TYPE_DICTIONARY)) {
|
|
LOG(ERROR) << "Failed to parse header: " << error;
|
|
return false;
|
|
}
|
|
|
|
header_size_ = 8 + size;
|
|
header_.reset(static_cast<base::DictionaryValue*>(value.release()));
|
|
return true;
|
|
}
|
|
|
|
bool Archive::GetFileInfo(const base::FilePath& path, FileInfo* info) {
|
|
if (!header_)
|
|
return false;
|
|
|
|
const base::DictionaryValue* node;
|
|
if (!GetNodeFromPath(path.AsUTF8Unsafe(), header_.get(), &node))
|
|
return false;
|
|
|
|
std::string link;
|
|
if (node->GetString("link", &link))
|
|
return GetFileInfo(base::FilePath::FromUTF8Unsafe(link), info);
|
|
|
|
return FillFileInfoWithNode(info, header_size_, node);
|
|
}
|
|
|
|
bool Archive::Stat(const base::FilePath& path, Stats* stats) {
|
|
if (!header_)
|
|
return false;
|
|
|
|
const base::DictionaryValue* node;
|
|
if (!GetNodeFromPath(path.AsUTF8Unsafe(), header_.get(), &node))
|
|
return false;
|
|
|
|
if (node->HasKey("link")) {
|
|
stats->is_file = false;
|
|
stats->is_link = true;
|
|
return true;
|
|
}
|
|
|
|
if (node->HasKey("files")) {
|
|
stats->is_file = false;
|
|
stats->is_directory = true;
|
|
return true;
|
|
}
|
|
|
|
return FillFileInfoWithNode(stats, header_size_, node);
|
|
}
|
|
|
|
bool Archive::Readdir(const base::FilePath& path,
|
|
std::vector<base::FilePath>* list) {
|
|
if (!header_)
|
|
return false;
|
|
|
|
const base::DictionaryValue* node;
|
|
if (!GetNodeFromPath(path.AsUTF8Unsafe(), header_.get(), &node))
|
|
return false;
|
|
|
|
const base::DictionaryValue* files;
|
|
if (!GetFilesNode(header_.get(), node, &files))
|
|
return false;
|
|
|
|
base::DictionaryValue::Iterator iter(*files);
|
|
while (!iter.IsAtEnd()) {
|
|
list->push_back(base::FilePath::FromUTF8Unsafe(iter.key()));
|
|
iter.Advance();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool Archive::Realpath(const base::FilePath& path, base::FilePath* realpath) {
|
|
if (!header_)
|
|
return false;
|
|
|
|
const base::DictionaryValue* node;
|
|
if (!GetNodeFromPath(path.AsUTF8Unsafe(), header_.get(), &node))
|
|
return false;
|
|
|
|
std::string link;
|
|
if (node->GetString("link", &link)) {
|
|
*realpath = base::FilePath::FromUTF8Unsafe(link);
|
|
return true;
|
|
}
|
|
|
|
*realpath = path;
|
|
return true;
|
|
}
|
|
|
|
bool Archive::CopyFileOut(const base::FilePath& path, base::FilePath* out) {
|
|
if (external_files_.contains(path)) {
|
|
*out = external_files_.get(path)->path();
|
|
return true;
|
|
}
|
|
|
|
FileInfo info;
|
|
if (!GetFileInfo(path, &info))
|
|
return false;
|
|
|
|
if (info.unpacked) {
|
|
*out = path_.AddExtension(FILE_PATH_LITERAL("unpacked")).Append(path);
|
|
return true;
|
|
}
|
|
|
|
std::unique_ptr<ScopedTemporaryFile> temp_file(new ScopedTemporaryFile);
|
|
base::FilePath::StringType ext = path.Extension();
|
|
if (!temp_file->InitFromFile(&file_, ext, info.offset, info.size))
|
|
return false;
|
|
|
|
#if defined(OS_POSIX)
|
|
if (info.executable) {
|
|
// chmod a+x temp_file;
|
|
base::SetPosixFilePermissions(temp_file->path(), 0755);
|
|
}
|
|
#endif
|
|
|
|
*out = temp_file->path();
|
|
external_files_.set(path, std::move(temp_file));
|
|
return true;
|
|
}
|
|
|
|
int Archive::GetFD() const {
|
|
return fd_;
|
|
}
|
|
|
|
} // namespace asar
|