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// Copyright 2014 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 "components/update_client/component_patcher.h"
#include <string>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/location.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/sequenced_task_runner_handle.h"
#include "base/values.h"
#include "components/update_client/component_patcher_operation.h"
#include "components/update_client/update_client.h"
#include "components/update_client/update_client_errors.h"
#include "services/service_manager/public/cpp/connector.h"
namespace update_client {
namespace {
// Deserialize the commands file (present in delta update packages). The top
// level must be a list.
base::ListValue* ReadCommands(const base::FilePath& unpack_path) {
const base::FilePath commands =
unpack_path.Append(FILE_PATH_LITERAL("commands.json"));
if (!base::PathExists(commands))
return nullptr;
JSONFileValueDeserializer deserializer(commands);
std::unique_ptr<base::Value> root =
deserializer.Deserialize(nullptr, nullptr);
return (root.get() && root->is_list())
? static_cast<base::ListValue*>(root.release())
: nullptr;
}
} // namespace
ComponentPatcher::ComponentPatcher(
const base::FilePath& input_dir,
const base::FilePath& unpack_dir,
scoped_refptr<CrxInstaller> installer,
std::unique_ptr<service_manager::Connector> connector)
: input_dir_(input_dir),
unpack_dir_(unpack_dir),
installer_(installer),
connector_(std::move(connector)) {}
ComponentPatcher::~ComponentPatcher() {
}
void ComponentPatcher::Start(Callback callback) {
callback_ = std::move(callback);
base::SequencedTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(&ComponentPatcher::StartPatching,
scoped_refptr<ComponentPatcher>(this)));
}
void ComponentPatcher::StartPatching() {
commands_.reset(ReadCommands(input_dir_));
if (!commands_.get()) {
DonePatching(UnpackerError::kDeltaBadCommands, 0);
} else {
next_command_ = commands_->begin();
PatchNextFile();
}
}
void ComponentPatcher::PatchNextFile() {
if (next_command_ == commands_->end()) {
DonePatching(UnpackerError::kNone, 0);
return;
}
const base::DictionaryValue* command_args;
if (!next_command_->GetAsDictionary(&command_args)) {
DonePatching(UnpackerError::kDeltaBadCommands, 0);
return;
}
std::string operation;
if (command_args->GetString(kOp, &operation)) {
current_operation_ = CreateDeltaUpdateOp(operation, connector_.get());
}
if (!current_operation_.get()) {
DonePatching(UnpackerError::kDeltaUnsupportedCommand, 0);
return;
}
current_operation_->Run(
command_args, input_dir_, unpack_dir_, installer_,
base::BindOnce(&ComponentPatcher::DonePatchingFile,
scoped_refptr<ComponentPatcher>(this)));
}
void ComponentPatcher::DonePatchingFile(UnpackerError error,
int extended_error) {
if (error != UnpackerError::kNone) {
DonePatching(error, extended_error);
} else {
++next_command_;
PatchNextFile();
}
}
void ComponentPatcher::DonePatching(UnpackerError error, int extended_error) {
current_operation_ = nullptr;
base::SequencedTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback_), error, extended_error));
}
} // namespace update_client
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