chrome/updater/updater.cc

// Copyright 2019 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/updater/updater.h"

#include <iterator>
#include <memory>
#include <string>
#include <utility>
#include <vector>

#include "base/at_exit.h"
#include "base/callback_forward.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_refptr.h"
#include "base/message_loop/message_loop.h"
#include "base/optional.h"
#include "base/run_loop.h"
#include "base/stl_util.h"
#include "base/task/post_task.h"
#include "base/task/task_scheduler/initialization_util.h"
#include "base/task/task_scheduler/task_scheduler.h"
#include "base/task_runner.h"
#include "base/threading/platform_thread.h"
#include "base/threading/thread_restrictions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "chrome/updater/configurator.h"
#include "components/services/patch/public/cpp/manifest.h"
#include "components/services/patch/public/interfaces/constants.mojom.h"
#include "components/services/unzip/public/cpp/manifest.h"
#include "components/services/unzip/public/interfaces/constants.mojom.h"
#include "components/update_client/crx_update_item.h"
#include "components/update_client/update_client.h"
#include "mojo/core/embedder/embedder.h"
#include "services/service_manager/background_service_manager.h"
#include "services/service_manager/public/cpp/manifest_builder.h"
#include "services/service_manager/public/cpp/service.h"
#include "services/service_manager/public/cpp/service_binding.h"
#include "services/service_manager/public/mojom/service.mojom.h"

namespace updater {

namespace {

// For now, use the Flash CRX for testing.
// CRX id is mimojjlkmoijpicakmndhoigimigcmbb.
const uint8_t mimo_hash[] = {0xc8, 0xce, 0x99, 0xba, 0xce, 0x89, 0xf8, 0x20,
                             0xac, 0xd3, 0x7e, 0x86, 0x8c, 0x86, 0x2c, 0x11,
                             0xb9, 0x40, 0xc5, 0x55, 0xaf, 0x08, 0x63, 0x70,
                             0x54, 0xf9, 0x56, 0xd3, 0xe7, 0x88, 0xba, 0x8c};

void TaskSchedulerStart() {
  base::TaskScheduler::Create("Updater");
  const auto task_scheduler_init_params =
      std::make_unique<base::TaskScheduler::InitParams>(
          base::SchedulerWorkerPoolParams(
              base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.1, 0),
              base::TimeDelta::FromSeconds(30)),
          base::SchedulerWorkerPoolParams(
              base::RecommendedMaxNumberOfThreadsInPool(8, 32, 0.3, 0),
              base::TimeDelta::FromSeconds(30)));
  base::TaskScheduler::GetInstance()->Start(*task_scheduler_init_params);
}

void TaskSchedulerStop() {
  base::TaskScheduler::GetInstance()->Shutdown();
}

void QuitLoop(base::OnceClosure quit_closure) {
  std::move(quit_closure).Run();
}

// An EmbedderService is a no-op service that represents the updater main (the
// embedder of the service_manager). It exposes its Connector for use in the
// configurator, and owns the service_manager itself.
class EmbedderService : public service_manager::Service {
 public:
  EmbedderService(service_manager::mojom::ServiceRequest request,
                  std::unique_ptr<service_manager::BackgroundServiceManager>
                      service_manager)
      : binding_(this, std::move(request)),
        service_manager_(std::move(service_manager)) {}
  ~EmbedderService() override {}
  std::unique_ptr<service_manager::Connector> Connector() {
    return binding_.GetConnector()->Clone();
  }

 private:
  service_manager::ServiceBinding binding_;
  std::unique_ptr<service_manager::BackgroundServiceManager> service_manager_;
  DISALLOW_COPY_AND_ASSIGN(EmbedderService);
};

std::unique_ptr<EmbedderService> CreateEmbedderService() {
  const char* kEmbedderServiceName = "embedder_updater";
  auto service_manager =
      std::make_unique<service_manager::BackgroundServiceManager>(
          std::vector<service_manager::Manifest>(
              {patch::GetManifest(), unzip::GetManifest(),
               service_manager::ManifestBuilder()
                   .WithServiceName(kEmbedderServiceName)
                   .RequireCapability(patch::mojom::kServiceName, "patch_file")
                   .RequireCapability(unzip::mojom::kServiceName, "unzip_file")
                   .Build()}));
  service_manager::mojom::ServicePtr service;
  service_manager::mojom::ServiceRequest request = mojo::MakeRequest(&service);
  service_manager->RegisterService(
      service_manager::Identity{kEmbedderServiceName,
                                base::Token::CreateRandom(), base::Token{},
                                base::Token::CreateRandom()},
      std::move(service), nullptr);
  return std::make_unique<EmbedderService>(std::move(request),
                                           std::move(service_manager));
}

class Observer : public update_client::UpdateClient::Observer {
 public:
  explicit Observer(scoped_refptr<update_client::UpdateClient> update_client)
      : update_client_(update_client) {}

  // Overrides for update_client::UpdateClient::Observer.
  void OnEvent(Events event, const std::string& id) override {
    update_client::CrxUpdateItem item;
    update_client_->GetCrxUpdateState(id, &item);
  }

 private:
  scoped_refptr<update_client::UpdateClient> update_client_;
  DISALLOW_COPY_AND_ASSIGN(Observer);
};

void InitLogging(const base::CommandLine& command_line) {
  logging::LoggingSettings settings;
  settings.logging_dest = logging::LOG_TO_ALL;
  settings.log_file = FILE_PATH_LITERAL("updater.log");
  logging::InitLogging(settings);
  logging::SetLogItems(true,    // enable_process_id
                       true,    // enable_thread_id
                       true,    // enable_timestamp
                       false);  // enable_tickcount
}

}  // namespace

int UpdaterMain(int argc, const char* const* argv) {
  base::CommandLine::Init(argc, argv);
  const base::CommandLine* command_line =
      base::CommandLine::ForCurrentProcess();
  if (command_line->HasSwitch("test"))
    return 0;

  base::DisallowBlocking();

  InitLogging(*command_line);

  base::PlatformThread::SetName("UpdaterMain");

  base::AtExitManager exit_manager;

  mojo::core::Init();

  TaskSchedulerStart();

  base::MessageLoopForUI message_loop;
  base::RunLoop runloop;
  DCHECK(base::ThreadTaskRunnerHandle::IsSet());

  auto embedder_service = CreateEmbedderService();
  auto config =
      base::MakeRefCounted<Configurator>(embedder_service->Connector());
  auto update_client = update_client::UpdateClientFactory(config);

  Observer observer(update_client);
  update_client->AddObserver(&observer);

  const std::vector<std::string> ids = {"mimojjlkmoijpicakmndhoigimigcmbb"};
  update_client->Update(
      ids,
      base::BindOnce(
          [](const std::vector<std::string>& ids)
              -> std::vector<base::Optional<update_client::CrxComponent>> {
            update_client::CrxComponent component;
            component.name = "mimo";
            component.pk_hash.assign(std::begin(mimo_hash),
                                     std::end(mimo_hash));
            component.version = base::Version("0.0");
            component.requires_network_encryption = false;
            return {component};
          }),
      true,
      base::BindOnce(
          [](base::OnceClosure closure, update_client::Error error) {
            base::ThreadTaskRunnerHandle::Get()->PostTask(
                FROM_HERE, base::BindOnce(&QuitLoop, std::move(closure)));
          },
          runloop.QuitWhenIdleClosure()));

  runloop.Run();

  update_client->RemoveObserver(&observer);
  update_client = nullptr;
  TaskSchedulerStop();
  return 0;
}

}  // namespace updater