blob: 9dafd982b3594509e165a8ca5eced5642508b46c [file] [log] [blame]
// Copyright 2018 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 <memory>
#include <set>
#include <string>
#include <tuple>
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "base/values.h"
#include "services/data_decoder/public/mojom/json_parser.mojom.h"
#include "services/service_manager/public/cpp/service_filter.h"
namespace service_manager {
class Connector;
namespace extensions {
// This class takes potentially unsafe JSON files, decodes them in a sandboxed
// process, then reencodes them so that they can later be parsed safely from the
// browser process.
// Note that at this time it this is limited to JSON files that contain a
// unique dictionary as their root and will fail with a kDecodingError if that
// is not the case.
class JsonFileSanitizer {
enum class Status {
kSuccess = 0,
// Callback invoked when the JSON sanitization is is done. If status is an
// error, |error_msg| contains the error message.
using Callback =
base::OnceCallback<void(Status status, const std::string& error_msg)>;
// Creates a JsonFileSanitizer and starts the sanitization of the JSON files
// in |file_paths|.
// |connector| should be a connector to the ServiceManager usable on the
// current thread. |identity| is used when accessing the data decoder service
// which is used internally to parse JSON. It lets callers indicate they'd
// like to use a sahred process for the data decoder service with some
// potentially unrelated data decoding operations.
// |callback| is invoked asynchronously when all JSON files have been
// sanitized or if an error occurred.
// If the returned JsonFileSanitizer instance is deleted before |callback| was
// invoked, then |callback| is never invoked and the sanitization stops
// promptly (some background tasks may still run).
static std::unique_ptr<JsonFileSanitizer> CreateAndStart(
service_manager::Connector* connector,
const service_manager::ServiceFilter& service_filter,
const std::set<base::FilePath>& file_paths,
Callback callback);
JsonFileSanitizer(const std::set<base::FilePath>& file_paths,
Callback callback);
void Start(service_manager::Connector* connector,
const service_manager::ServiceFilter& service_filter);
void JsonFileRead(const base::FilePath& file_path,
std::tuple<std::string, bool, bool> read_and_delete_result);
void JsonParsingDone(const base::FilePath& file_path,
base::Optional<base::Value> json_value,
const base::Optional<std::string>& error);
void JsonFileWritten(const base::FilePath& file_path,
int expected_size,
int actual_size);
void ReportSuccess();
void ReportError(Status status, const std::string& path);
std::set<base::FilePath> file_paths_;
Callback callback_;
data_decoder::mojom::JsonParserPtr json_parser_ptr_;
base::WeakPtrFactory<JsonFileSanitizer> weak_factory_;
} // namespace extensions