1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
6 #include "base/bind_helpers.h"
7 #include "base/files/file_enumerator.h"
8 #include "base/files/file_path.h"
9 #include "base/files/file_util.h"
10 #include "base/location.h"
11 #include "base/message_loop/message_loop_proxy.h"
12 #include "base/sequenced_task_runner.h"
13 #include "base/single_thread_task_runner.h"
14 #include "base/values.h"
15 #include "base/version.h"
16 // TODO(ddorwin): Find a better place for ReadManifest.
17 #include "components/component_updater/component_unpacker.h"
18 #include "components/component_updater/component_updater_configurator.h"
19 #include "components/component_updater/default_component_installer.h"
21 namespace component_updater {
24 // Version "0" corresponds to no installed version. By the server's conventions,
25 // we represent it as a dotted quad.
26 const char kNullVersion[] = "0.0.0.0";
29 ComponentInstallerTraits::~ComponentInstallerTraits() {
32 DefaultComponentInstaller::DefaultComponentInstaller(
33 scoped_ptr<ComponentInstallerTraits> installer_traits)
34 : current_version_(kNullVersion),
35 main_task_runner_(base::MessageLoopProxy::current()) {
36 installer_traits_ = installer_traits.Pass();
39 DefaultComponentInstaller::~DefaultComponentInstaller() {
40 DCHECK(thread_checker_.CalledOnValidThread());
43 void DefaultComponentInstaller::Register(ComponentUpdateService* cus) {
44 DCHECK(thread_checker_.CalledOnValidThread());
45 task_runner_ = cus->GetSequencedTaskRunner();
47 if (!installer_traits_) {
48 NOTREACHED() << "A DefaultComponentInstaller has been created but "
49 << "has no installer traits.";
52 task_runner_->PostTask(
54 base::Bind(&DefaultComponentInstaller::StartRegistration,
55 base::Unretained(this),
59 void DefaultComponentInstaller::OnUpdateError(int error) {
60 NOTREACHED() << "Component update error: " << error;
63 bool DefaultComponentInstaller::InstallHelper(
64 const base::DictionaryValue& manifest,
65 const base::FilePath& unpack_path,
66 const base::FilePath& install_path) {
67 if (!base::Move(unpack_path, install_path))
69 if (!installer_traits_->OnCustomInstall(manifest, install_path))
71 if (!installer_traits_->VerifyInstallation(install_path))
76 bool DefaultComponentInstaller::Install(const base::DictionaryValue& manifest,
77 const base::FilePath& unpack_path) {
78 std::string manifest_version;
79 manifest.GetStringASCII("version", &manifest_version);
80 base::Version version(manifest_version.c_str());
81 if (!version.IsValid())
83 if (current_version_.CompareTo(version) > 0)
85 base::FilePath install_path =
86 installer_traits_->GetBaseDirectory().AppendASCII(version.GetString());
87 if (base::PathExists(install_path)) {
88 if (!base::DeleteFile(install_path, true))
91 if (!InstallHelper(manifest, unpack_path, install_path)) {
92 base::DeleteFile(install_path, true);
95 current_version_ = version;
96 // TODO(ddorwin): Change the parameter to scoped_ptr<base::DictionaryValue>
97 // so we can avoid this DeepCopy.
98 current_manifest_.reset(manifest.DeepCopy());
99 scoped_ptr<base::DictionaryValue> manifest_copy(
100 current_manifest_->DeepCopy());
101 main_task_runner_->PostTask(
103 base::Bind(&ComponentInstallerTraits::ComponentReady,
104 base::Unretained(installer_traits_.get()),
106 GetInstallDirectory(),
107 base::Passed(&manifest_copy)));
111 bool DefaultComponentInstaller::GetInstalledFile(
112 const std::string& file,
113 base::FilePath* installed_file) {
114 if (current_version_.Equals(base::Version(kNullVersion)))
115 return false; // No component has been installed yet.
117 *installed_file = installer_traits_->GetBaseDirectory()
118 .AppendASCII(current_version_.GetString())
123 void DefaultComponentInstaller::StartRegistration(ComponentUpdateService* cus) {
124 DCHECK(task_runner_.get());
125 DCHECK(task_runner_->RunsTasksOnCurrentThread());
126 base::FilePath base_dir = installer_traits_->GetBaseDirectory();
127 if (!base::PathExists(base_dir) && !base::CreateDirectory(base_dir)) {
128 NOTREACHED() << "Could not create the base directory for "
129 << installer_traits_->GetName() << " ("
130 << base_dir.MaybeAsASCII() << ").";
134 base::FilePath latest_dir;
135 base::Version latest_version(kNullVersion);
136 std::vector<base::FilePath> older_dirs;
138 base::FileEnumerator file_enumerator(
139 base_dir, false, base::FileEnumerator::DIRECTORIES);
140 for (base::FilePath path = file_enumerator.Next();
141 !path.value().empty();
142 path = file_enumerator.Next()) {
143 base::Version version(path.BaseName().MaybeAsASCII());
144 // Ignore folders that don't have valid version names. These folders are not
145 // managed by component installer so do not try to remove them.
146 if (!version.IsValid())
148 if (!installer_traits_->VerifyInstallation(path)) {
149 older_dirs.push_back(path);
153 if (version.CompareTo(latest_version) > 0) {
154 older_dirs.push_back(latest_dir);
156 latest_version = version;
158 older_dirs.push_back(path);
162 latest_version = version;
168 current_manifest_ = ReadManifest(latest_dir);
169 if (current_manifest_) {
170 current_version_ = latest_version;
171 // TODO(ddorwin): Remove these members and pass them directly to
172 // FinishRegistration().
173 base::ReadFileToString(latest_dir.AppendASCII("manifest.fingerprint"),
174 ¤t_fingerprint_);
176 // If the manifest can't be read, mark the directory for deletion and
177 // continue as if there were no versioned directories at all.
178 DLOG(ERROR) << "Failed to read manifest for "
179 << installer_traits_->GetName() << " ("
180 << base_dir.MaybeAsASCII() << ").";
181 older_dirs.push_back(latest_dir);
185 // Remove older versions of the component. None should be in use during
187 for (std::vector<base::FilePath>::iterator iter = older_dirs.begin();
188 iter != older_dirs.end();
190 base::DeleteFile(*iter, true);
193 main_task_runner_->PostTask(
195 base::Bind(&DefaultComponentInstaller::FinishRegistration,
196 base::Unretained(this),
200 base::FilePath DefaultComponentInstaller::GetInstallDirectory() {
201 return installer_traits_->GetBaseDirectory()
202 .AppendASCII(current_version_.GetString());
205 void DefaultComponentInstaller::FinishRegistration(
206 ComponentUpdateService* cus) {
207 DCHECK(thread_checker_.CalledOnValidThread());
208 if (installer_traits_->CanAutoUpdate()) {
210 crx.name = installer_traits_->GetName();
211 crx.installer = this;
212 crx.version = current_version_;
213 crx.fingerprint = current_fingerprint_;
214 installer_traits_->GetHash(&crx.pk_hash);
215 ComponentUpdateService::Status status = cus->RegisterComponent(crx);
216 if (status != ComponentUpdateService::kOk &&
217 status != ComponentUpdateService::kReplaced) {
218 NOTREACHED() << "Component registration failed for "
219 << installer_traits_->GetName();
224 if (current_version_.CompareTo(base::Version(kNullVersion)) > 0) {
225 scoped_ptr<base::DictionaryValue> manifest_copy(
226 current_manifest_->DeepCopy());
227 installer_traits_->ComponentReady(
228 current_version_, GetInstallDirectory(), manifest_copy.Pass());
232 } // namespace component_updater