1 // Copyright 2013 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/file_util.h"
7 #include "base/files/file_enumerator.h"
8 #include "base/files/file_path.h"
9 #include "base/values.h"
10 #include "base/version.h"
11 // TODO(ddorwin): Find a better place for ReadManifest.
12 #include "chrome/browser/component_updater/component_unpacker.h"
13 #include "chrome/browser/component_updater/default_component_installer.h"
14 #include "content/public/browser/browser_thread.h"
16 namespace component_updater {
19 // Version "0" corresponds to no installed version. By the server's conventions,
20 // we represent it as a dotted quad.
21 const char kNullVersion[] = "0.0.0.0";
24 ComponentInstallerTraits::~ComponentInstallerTraits() {
27 DefaultComponentInstaller::DefaultComponentInstaller(
28 scoped_ptr<ComponentInstallerTraits> installer_traits)
29 : current_version_(kNullVersion) {
30 installer_traits_ = installer_traits.Pass();
33 DefaultComponentInstaller::~DefaultComponentInstaller() {
36 void DefaultComponentInstaller::Register(ComponentUpdateService* cus) {
37 if (!installer_traits_) {
38 NOTREACHED() << "A DefaultComponentInstaller has been created but "
39 << "has no installer traits.";
42 content::BrowserThread::PostBlockingPoolTask(
44 base::Bind(&DefaultComponentInstaller::StartRegistration,
45 base::Unretained(this),
49 void DefaultComponentInstaller::OnUpdateError(int error) {
50 NOTREACHED() << "Component update error: " << error;
53 bool DefaultComponentInstaller::InstallHelper(
54 const base::DictionaryValue& manifest,
55 const base::FilePath& unpack_path,
56 const base::FilePath& install_path) {
57 if (!base::Move(unpack_path, install_path))
59 if (!installer_traits_->OnCustomInstall(manifest, install_path))
61 if (!installer_traits_->VerifyInstallation(install_path))
66 bool DefaultComponentInstaller::Install(const base::DictionaryValue& manifest,
67 const base::FilePath& unpack_path) {
68 std::string manifest_version;
69 manifest.GetStringASCII("version", &manifest_version);
70 base::Version version(manifest_version.c_str());
71 if (!version.IsValid())
73 if (current_version_.CompareTo(version) > 0)
75 base::FilePath install_path =
76 installer_traits_->GetBaseDirectory().AppendASCII(version.GetString());
77 if (base::PathExists(install_path)) {
78 if (!base::DeleteFile(install_path, true))
81 if (!InstallHelper(manifest, unpack_path, install_path)) {
82 base::DeleteFile(install_path, true);
85 current_version_ = version;
86 // TODO(ddorwin): Change the parameter to scoped_ptr<base::DictionaryValue>
87 // so we can avoid this DeepCopy.
88 current_manifest_.reset(manifest.DeepCopy());
89 scoped_ptr<base::DictionaryValue> manifest_copy(
90 current_manifest_->DeepCopy());
91 content::BrowserThread::PostTask(
92 content::BrowserThread::UI,
94 base::Bind(&ComponentInstallerTraits::ComponentReady,
95 base::Unretained(installer_traits_.get()),
97 GetInstallDirectory(),
98 base::Passed(&manifest_copy)));
102 bool DefaultComponentInstaller::GetInstalledFile(
103 const std::string& file,
104 base::FilePath* installed_file) {
105 if (current_version_.Equals(base::Version(kNullVersion)))
106 return false; // No component has been installed yet.
108 *installed_file = installer_traits_->GetBaseDirectory()
109 .AppendASCII(current_version_.GetString())
114 void DefaultComponentInstaller::StartRegistration(ComponentUpdateService* cus) {
115 base::FilePath base_dir = installer_traits_->GetBaseDirectory();
116 if (!base::PathExists(base_dir) && !base::CreateDirectory(base_dir)) {
117 NOTREACHED() << "Could not create the base directory for "
118 << installer_traits_->GetName() << " ("
119 << base_dir.MaybeAsASCII() << ").";
123 base::FilePath latest_dir;
124 base::Version latest_version(kNullVersion);
125 std::vector<base::FilePath> older_dirs;
127 base::FileEnumerator file_enumerator(
128 base_dir, false, base::FileEnumerator::DIRECTORIES);
129 for (base::FilePath path = file_enumerator.Next();
130 !path.value().empty();
131 path = file_enumerator.Next()) {
132 base::Version version(path.BaseName().MaybeAsASCII());
133 // Ignore folders that don't have valid version names. These folders are not
134 // managed by component installer so do not try to remove them.
135 if (!version.IsValid())
137 if (!installer_traits_->VerifyInstallation(path)) {
138 older_dirs.push_back(path);
142 if (version.CompareTo(latest_version) > 0) {
143 older_dirs.push_back(latest_dir);
145 latest_version = version;
147 older_dirs.push_back(path);
151 latest_version = version;
157 current_manifest_ = ReadManifest(latest_dir);
158 if (current_manifest_) {
159 current_version_ = latest_version;
160 // TODO(ddorwin): Remove these members and pass them directly to
161 // FinishRegistration().
162 base::ReadFileToString(latest_dir.AppendASCII("manifest.fingerprint"),
163 ¤t_fingerprint_);
165 // If the manifest can't be read, mark the directory for deletion and
166 // continue as if there were no versioned directories at all.
167 DLOG(ERROR) << "Failed to read manifest for "
168 << installer_traits_->GetName() << " ("
169 << base_dir.MaybeAsASCII() << ").";
170 older_dirs.push_back(latest_dir);
174 // Remove older versions of the component. None should be in use during
176 for (std::vector<base::FilePath>::iterator iter = older_dirs.begin();
177 iter != older_dirs.end();
179 base::DeleteFile(*iter, true);
182 content::BrowserThread::PostTask(
183 content::BrowserThread::UI,
185 base::Bind(&DefaultComponentInstaller::FinishRegistration,
186 base::Unretained(this),
190 base::FilePath DefaultComponentInstaller::GetInstallDirectory() {
191 return installer_traits_->GetBaseDirectory()
192 .AppendASCII(current_version_.GetString());
195 void DefaultComponentInstaller::FinishRegistration(
196 ComponentUpdateService* cus) {
197 DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
198 if (installer_traits_->CanAutoUpdate()) {
200 crx.name = installer_traits_->GetName();
201 crx.installer = this;
202 crx.version = current_version_;
203 crx.fingerprint = current_fingerprint_;
204 installer_traits_->GetHash(&crx.pk_hash);
205 ComponentUpdateService::Status status = cus->RegisterComponent(crx);
206 if (status != ComponentUpdateService::kOk &&
207 status != ComponentUpdateService::kReplaced) {
208 NOTREACHED() << "Component registration failed for "
209 << installer_traits_->GetName();
214 if (current_version_.CompareTo(base::Version(kNullVersion)) > 0) {
215 scoped_ptr<base::DictionaryValue> manifest_copy(
216 current_manifest_->DeepCopy());
217 installer_traits_->ComponentReady(
218 current_version_, GetInstallDirectory(), manifest_copy.Pass());
222 } // namespace component_updater