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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 "base/bind.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/sequenced_task_runner.h"
#include "base/single_thread_task_runner.h"
#include "base/values.h"
#include "base/version.h"
// TODO(ddorwin): Find a better place for ReadManifest.
#include "components/component_updater/component_unpacker.h"
#include "components/component_updater/component_updater_configurator.h"
#include "components/component_updater/default_component_installer.h"
namespace component_updater {
namespace {
// Version "0" corresponds to no installed version. By the server's conventions,
// we represent it as a dotted quad.
const char kNullVersion[] = "0.0.0.0";
} // namespace
ComponentInstallerTraits::~ComponentInstallerTraits() {
}
DefaultComponentInstaller::DefaultComponentInstaller(
scoped_ptr<ComponentInstallerTraits> installer_traits)
: current_version_(kNullVersion),
main_task_runner_(base::MessageLoopProxy::current()) {
installer_traits_ = installer_traits.Pass();
}
DefaultComponentInstaller::~DefaultComponentInstaller() {
DCHECK(thread_checker_.CalledOnValidThread());
}
void DefaultComponentInstaller::Register(ComponentUpdateService* cus) {
DCHECK(thread_checker_.CalledOnValidThread());
task_runner_ = cus->GetSequencedTaskRunner();
if (!installer_traits_) {
NOTREACHED() << "A DefaultComponentInstaller has been created but "
<< "has no installer traits.";
return;
}
task_runner_->PostTask(
FROM_HERE,
base::Bind(&DefaultComponentInstaller::StartRegistration,
base::Unretained(this),
cus));
}
void DefaultComponentInstaller::OnUpdateError(int error) {
NOTREACHED() << "Component update error: " << error;
}
bool DefaultComponentInstaller::InstallHelper(
const base::DictionaryValue& manifest,
const base::FilePath& unpack_path,
const base::FilePath& install_path) {
if (!base::Move(unpack_path, install_path))
return false;
if (!installer_traits_->OnCustomInstall(manifest, install_path))
return false;
if (!installer_traits_->VerifyInstallation(install_path))
return false;
return true;
}
bool DefaultComponentInstaller::Install(const base::DictionaryValue& manifest,
const base::FilePath& unpack_path) {
std::string manifest_version;
manifest.GetStringASCII("version", &manifest_version);
base::Version version(manifest_version.c_str());
if (!version.IsValid())
return false;
if (current_version_.CompareTo(version) > 0)
return false;
base::FilePath install_path =
installer_traits_->GetBaseDirectory().AppendASCII(version.GetString());
if (base::PathExists(install_path)) {
if (!base::DeleteFile(install_path, true))
return false;
}
if (!InstallHelper(manifest, unpack_path, install_path)) {
base::DeleteFile(install_path, true);
return false;
}
current_version_ = version;
// TODO(ddorwin): Change the parameter to scoped_ptr<base::DictionaryValue>
// so we can avoid this DeepCopy.
current_manifest_.reset(manifest.DeepCopy());
scoped_ptr<base::DictionaryValue> manifest_copy(
current_manifest_->DeepCopy());
main_task_runner_->PostTask(
FROM_HERE,
base::Bind(&ComponentInstallerTraits::ComponentReady,
base::Unretained(installer_traits_.get()),
current_version_,
GetInstallDirectory(),
base::Passed(&manifest_copy)));
return true;
}
bool DefaultComponentInstaller::GetInstalledFile(
const std::string& file,
base::FilePath* installed_file) {
if (current_version_.Equals(base::Version(kNullVersion)))
return false; // No component has been installed yet.
*installed_file = installer_traits_->GetBaseDirectory()
.AppendASCII(current_version_.GetString())
.AppendASCII(file);
return true;
}
void DefaultComponentInstaller::StartRegistration(ComponentUpdateService* cus) {
DCHECK(task_runner_.get());
DCHECK(task_runner_->RunsTasksOnCurrentThread());
base::FilePath base_dir = installer_traits_->GetBaseDirectory();
if (!base::PathExists(base_dir) && !base::CreateDirectory(base_dir)) {
NOTREACHED() << "Could not create the base directory for "
<< installer_traits_->GetName() << " ("
<< base_dir.MaybeAsASCII() << ").";
return;
}
base::FilePath latest_dir;
base::Version latest_version(kNullVersion);
std::vector<base::FilePath> older_dirs;
bool found = false;
base::FileEnumerator file_enumerator(
base_dir, false, base::FileEnumerator::DIRECTORIES);
for (base::FilePath path = file_enumerator.Next();
!path.value().empty();
path = file_enumerator.Next()) {
base::Version version(path.BaseName().MaybeAsASCII());
// Ignore folders that don't have valid version names. These folders are not
// managed by component installer so do not try to remove them.
if (!version.IsValid())
continue;
if (!installer_traits_->VerifyInstallation(path)) {
older_dirs.push_back(path);
continue;
}
if (found) {
if (version.CompareTo(latest_version) > 0) {
older_dirs.push_back(latest_dir);
latest_dir = path;
latest_version = version;
} else {
older_dirs.push_back(path);
}
} else {
latest_dir = path;
latest_version = version;
found = true;
}
}
if (found) {
current_manifest_ = ReadManifest(latest_dir);
if (current_manifest_) {
current_version_ = latest_version;
// TODO(ddorwin): Remove these members and pass them directly to
// FinishRegistration().
base::ReadFileToString(latest_dir.AppendASCII("manifest.fingerprint"),
¤t_fingerprint_);
} else {
// If the manifest can't be read, mark the directory for deletion and
// continue as if there were no versioned directories at all.
DLOG(ERROR) << "Failed to read manifest for "
<< installer_traits_->GetName() << " ("
<< base_dir.MaybeAsASCII() << ").";
older_dirs.push_back(latest_dir);
}
}
// Remove older versions of the component. None should be in use during
// browser startup.
for (std::vector<base::FilePath>::iterator iter = older_dirs.begin();
iter != older_dirs.end();
++iter) {
base::DeleteFile(*iter, true);
}
main_task_runner_->PostTask(
FROM_HERE,
base::Bind(&DefaultComponentInstaller::FinishRegistration,
base::Unretained(this),
cus));
}
base::FilePath DefaultComponentInstaller::GetInstallDirectory() {
return installer_traits_->GetBaseDirectory()
.AppendASCII(current_version_.GetString());
}
void DefaultComponentInstaller::FinishRegistration(
ComponentUpdateService* cus) {
DCHECK(thread_checker_.CalledOnValidThread());
if (installer_traits_->CanAutoUpdate()) {
CrxComponent crx;
crx.name = installer_traits_->GetName();
crx.installer = this;
crx.version = current_version_;
crx.fingerprint = current_fingerprint_;
installer_traits_->GetHash(&crx.pk_hash);
ComponentUpdateService::Status status = cus->RegisterComponent(crx);
if (status != ComponentUpdateService::kOk &&
status != ComponentUpdateService::kReplaced) {
NOTREACHED() << "Component registration failed for "
<< installer_traits_->GetName();
return;
}
}
if (current_version_.CompareTo(base::Version(kNullVersion)) > 0) {
scoped_ptr<base::DictionaryValue> manifest_copy(
current_manifest_->DeepCopy());
installer_traits_->ComponentReady(
current_version_, GetInstallDirectory(), manifest_copy.Pass());
}
}
} // namespace component_updater
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