1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
// Copyright (c) 2012 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/browser/chromeos/policy/app_pack_updater.h"
#include "base/bind.h"
#include "base/memory/ref_counted.h"
#include "base/sequenced_task_runner.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/values.h"
#include "chrome/browser/chromeos/policy/enterprise_install_attributes.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "chrome/browser/extensions/external_loader.h"
#include "chrome/browser/extensions/external_provider_impl.h"
#include "chromeos/settings/cros_settings_names.h"
#include "content/public/browser/browser_thread.h"
using content::BrowserThread;
namespace policy {
namespace {
// Directory where the AppPack extensions are cached.
const char kAppPackCacheDir[] = "/var/cache/app_pack";
} // namespace
// A custom extensions::ExternalLoader that the AppPackUpdater creates and uses
// to publish AppPack updates to the extensions system.
class AppPackExternalLoader
: public extensions::ExternalLoader,
public base::SupportsWeakPtr<AppPackExternalLoader> {
public:
AppPackExternalLoader() {}
// Used by the AppPackUpdater to update the current list of extensions.
// The format of |prefs| is detailed in the extensions::ExternalLoader/
// Provider headers.
void SetCurrentAppPackExtensions(scoped_ptr<base::DictionaryValue> prefs) {
app_pack_prefs_.Swap(prefs.get());
StartLoading();
}
// Implementation of extensions::ExternalLoader:
virtual void StartLoading() OVERRIDE {
prefs_.reset(app_pack_prefs_.DeepCopy());
VLOG(1) << "AppPack extension loader publishing "
<< app_pack_prefs_.size() << " crx files.";
LoadFinished();
}
protected:
virtual ~AppPackExternalLoader() {}
private:
base::DictionaryValue app_pack_prefs_;
DISALLOW_COPY_AND_ASSIGN(AppPackExternalLoader);
};
AppPackUpdater::AppPackUpdater(net::URLRequestContextGetter* request_context,
EnterpriseInstallAttributes* install_attributes)
: weak_ptr_factory_(this),
created_extension_loader_(false),
install_attributes_(install_attributes),
external_cache_(base::FilePath(kAppPackCacheDir),
request_context,
content::BrowserThread::GetBlockingPool()->
GetSequencedTaskRunnerWithShutdownBehavior(
content::BrowserThread::GetBlockingPool()->
GetSequenceToken(),
base::SequencedWorkerPool::SKIP_ON_SHUTDOWN),
this,
false,
false) {
app_pack_subscription_ = chromeos::CrosSettings::Get()->AddSettingsObserver(
chromeos::kAppPack,
base::Bind(&AppPackUpdater::AppPackChanged, base::Unretained(this)));
if (install_attributes_->GetMode() == DEVICE_MODE_RETAIL_KIOSK) {
// Already in Kiosk mode, start loading.
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&AppPackUpdater::LoadPolicy,
weak_ptr_factory_.GetWeakPtr()));
} else {
// Linger until the device switches to DEVICE_MODE_RETAIL_KIOSK and the
// app pack device setting appears.
}
}
AppPackUpdater::~AppPackUpdater() {
}
extensions::ExternalLoader* AppPackUpdater::CreateExternalLoader() {
if (created_extension_loader_) {
NOTREACHED();
return NULL;
}
created_extension_loader_ = true;
AppPackExternalLoader* loader = new AppPackExternalLoader();
extension_loader_ = loader->AsWeakPtr();
// The cache may have been already checked. In that case, load the current
// extensions into the loader immediately.
UpdateExtensionLoader();
return loader;
}
void AppPackUpdater::SetScreenSaverUpdateCallback(
const AppPackUpdater::ScreenSaverUpdateCallback& callback) {
screen_saver_update_callback_ = callback;
if (!screen_saver_update_callback_.is_null() && !screen_saver_path_.empty()) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(screen_saver_update_callback_, screen_saver_path_));
}
}
void AppPackUpdater::AppPackChanged() {
if (install_attributes_->GetMode() == DEVICE_MODE_RETAIL_KIOSK)
LoadPolicy();
}
void AppPackUpdater::LoadPolicy() {
chromeos::CrosSettings* settings = chromeos::CrosSettings::Get();
if (chromeos::CrosSettingsProvider::TRUSTED != settings->PrepareTrustedValues(
base::Bind(&AppPackUpdater::LoadPolicy,
weak_ptr_factory_.GetWeakPtr()))) {
return;
}
scoped_ptr<base::DictionaryValue> prefs(new base::DictionaryValue());
const base::Value* value = settings->GetPref(chromeos::kAppPack);
const base::ListValue* list = NULL;
if (value && value->GetAsList(&list)) {
for (base::ListValue::const_iterator it = list->begin();
it != list->end(); ++it) {
base::DictionaryValue* dict = NULL;
if (!(*it)->GetAsDictionary(&dict)) {
LOG(WARNING) << "AppPack entry is not a dictionary, ignoring.";
continue;
}
std::string id;
std::string update_url;
if (dict->GetString(chromeos::kAppPackKeyExtensionId, &id) &&
dict->GetString(chromeos::kAppPackKeyUpdateUrl, &update_url)) {
base::DictionaryValue* entry = new base::DictionaryValue();
entry->SetString(extensions::ExternalProviderImpl::kExternalUpdateUrl,
update_url);
prefs->Set(id, entry);
} else {
LOG(WARNING) << "Failed to read required fields for an AppPack entry, "
<< "ignoring.";
}
}
}
VLOG(1) << "Refreshed AppPack policy, got " << prefs->size()
<< " entries.";
value = settings->GetPref(chromeos::kScreenSaverExtensionId);
if (!value || !value->GetAsString(&screen_saver_id_)) {
screen_saver_id_.clear();
SetScreenSaverPath(base::FilePath());
}
external_cache_.UpdateExtensionsList(prefs.Pass());
}
void AppPackUpdater::OnExtensionListsUpdated(
const base::DictionaryValue* prefs) {
std::string crx_path;
const base::DictionaryValue* screen_saver = NULL;
if (prefs->GetDictionary(screen_saver_id_, &screen_saver)) {
screen_saver->GetString(extensions::ExternalProviderImpl::kExternalCrx,
&crx_path);
}
if (!crx_path.empty())
SetScreenSaverPath(base::FilePath(crx_path));
else
SetScreenSaverPath(base::FilePath());
UpdateExtensionLoader();
}
void AppPackUpdater::UpdateExtensionLoader() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!extension_loader_) {
VLOG(1) << "No AppPack loader created yet, not pushing extensions.";
return;
}
scoped_ptr<base::DictionaryValue> prefs(
external_cache_.cached_extensions()->DeepCopy());
// The screensaver isn't installed into the Profile.
prefs->Remove(screen_saver_id_, NULL);
extension_loader_->SetCurrentAppPackExtensions(prefs.Pass());
}
void AppPackUpdater::OnDamagedFileDetected(const base::FilePath& path) {
external_cache_.OnDamagedFileDetected(path);
}
void AppPackUpdater::SetScreenSaverPath(const base::FilePath& path) {
// Don't invoke the callback if the path isn't changing.
if (path != screen_saver_path_) {
screen_saver_path_ = path;
if (!screen_saver_update_callback_.is_null())
screen_saver_update_callback_.Run(screen_saver_path_);
}
}
} // namespace policy
|
