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// Copyright 2013 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/app_mode/kiosk_app_data.h"
#include <vector>
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/json/json_writer.h"
#include "base/memory/ref_counted_memory.h"
#include "base/prefs/pref_service.h"
#include "base/prefs/scoped_user_pref_update.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/app_mode/kiosk_app_data_delegate.h"
#include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_util.h"
#include "chrome/browser/extensions/webstore_data_fetcher.h"
#include "chrome/browser/extensions/webstore_install_helper.h"
#include "chrome/browser/image_decoder.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/browser_thread.h"
#include "extensions/browser/extension_system.h"
#include "extensions/browser/image_loader.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension_urls.h"
#include "extensions/common/manifest.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/icons_handler.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/image/image.h"
using content::BrowserThread;
namespace chromeos {
namespace {
// Keys for local state data. See sample layout in KioskAppManager.
const char kKeyName[] = "name";
const char kKeyIcon[] = "icon";
const char kInvalidWebstoreResponseError[] = "Invalid Chrome Web Store reponse";
// Icon file extension.
const char kIconFileExtension[] = ".png";
// Save |raw_icon| for given |app_id|.
void SaveIconToLocalOnBlockingPool(
const base::FilePath& icon_path,
scoped_refptr<base::RefCountedString> raw_icon) {
DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
base::FilePath dir = icon_path.DirName();
if (!base::PathExists(dir))
CHECK(base::CreateDirectory(dir));
CHECK_EQ(static_cast<int>(raw_icon->size()),
base::WriteFile(icon_path,
raw_icon->data().c_str(), raw_icon->size()));
}
// Returns true for valid kiosk app manifest.
bool IsValidKioskAppManifest(const extensions::Manifest& manifest) {
bool kiosk_enabled;
if (manifest.GetBoolean(extensions::manifest_keys::kKioskEnabled,
&kiosk_enabled)) {
return kiosk_enabled;
}
return false;
}
std::string ValueToString(const base::Value* value) {
std::string json;
base::JSONWriter::Write(value, &json);
return json;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// KioskAppData::IconLoader
// Loads locally stored icon data and decode it.
class KioskAppData::IconLoader : public ImageDecoder::Delegate {
public:
enum LoadResult {
SUCCESS,
FAILED_TO_LOAD,
FAILED_TO_DECODE,
};
IconLoader(const base::WeakPtr<KioskAppData>& client,
const base::FilePath& icon_path)
: client_(client),
icon_path_(icon_path),
load_result_(SUCCESS) {}
void Start() {
base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
base::SequencedWorkerPool::SequenceToken token = pool->GetSequenceToken();
task_runner_ = pool->GetSequencedTaskRunnerWithShutdownBehavior(
token,
base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
task_runner_->PostTask(FROM_HERE,
base::Bind(&IconLoader::LoadOnBlockingPool,
base::Unretained(this)));
}
private:
friend class base::RefCountedThreadSafe<IconLoader>;
virtual ~IconLoader() {}
// Loads the icon from locally stored |icon_path_| on the blocking pool
void LoadOnBlockingPool() {
DCHECK(task_runner_->RunsTasksOnCurrentThread());
std::string data;
if (!base::ReadFileToString(base::FilePath(icon_path_), &data)) {
ReportResultOnBlockingPool(FAILED_TO_LOAD);
return;
}
raw_icon_ = base::RefCountedString::TakeString(&data);
scoped_refptr<ImageDecoder> image_decoder = new ImageDecoder(
this, raw_icon_->data(), ImageDecoder::DEFAULT_CODEC);
image_decoder->Start(task_runner_);
}
void ReportResultOnBlockingPool(LoadResult result) {
DCHECK(task_runner_->RunsTasksOnCurrentThread());
load_result_ = result;
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&IconLoader::ReportResultOnUIThread,
base::Unretained(this)));
}
void NotifyClient() {
if (!client_)
return;
if (load_result_ == SUCCESS)
client_->OnIconLoadSuccess(raw_icon_, icon_);
else
client_->OnIconLoadFailure();
}
void ReportResultOnUIThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
NotifyClient();
delete this;
}
// ImageDecoder::Delegate overrides:
virtual void OnImageDecoded(const ImageDecoder* decoder,
const SkBitmap& decoded_image) override {
icon_ = gfx::ImageSkia::CreateFrom1xBitmap(decoded_image);
icon_.MakeThreadSafe();
ReportResultOnBlockingPool(SUCCESS);
}
virtual void OnDecodeImageFailed(const ImageDecoder* decoder) override {
ReportResultOnBlockingPool(FAILED_TO_DECODE);
}
base::WeakPtr<KioskAppData> client_;
base::FilePath icon_path_;
LoadResult load_result_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
gfx::ImageSkia icon_;
scoped_refptr<base::RefCountedString> raw_icon_;
DISALLOW_COPY_AND_ASSIGN(IconLoader);
};
////////////////////////////////////////////////////////////////////////////////
// KioskAppData::WebstoreDataParser
// Use WebstoreInstallHelper to parse the manifest and decode the icon.
class KioskAppData::WebstoreDataParser
: public extensions::WebstoreInstallHelper::Delegate {
public:
explicit WebstoreDataParser(const base::WeakPtr<KioskAppData>& client)
: client_(client) {}
void Start(const std::string& app_id,
const std::string& manifest,
const GURL& icon_url,
net::URLRequestContextGetter* context_getter) {
scoped_refptr<extensions::WebstoreInstallHelper> webstore_helper =
new extensions::WebstoreInstallHelper(this,
app_id,
manifest,
"", // No icon data.
icon_url,
context_getter);
webstore_helper->Start();
}
private:
friend class base::RefCounted<WebstoreDataParser>;
virtual ~WebstoreDataParser() {}
void ReportFailure() {
if (client_)
client_->OnWebstoreParseFailure();
delete this;
}
// WebstoreInstallHelper::Delegate overrides:
virtual void OnWebstoreParseSuccess(
const std::string& id,
const SkBitmap& icon,
base::DictionaryValue* parsed_manifest) override {
// Takes ownership of |parsed_manifest|.
extensions::Manifest manifest(
extensions::Manifest::INVALID_LOCATION,
scoped_ptr<base::DictionaryValue>(parsed_manifest));
if (!IsValidKioskAppManifest(manifest)) {
ReportFailure();
return;
}
if (client_)
client_->OnWebstoreParseSuccess(icon);
delete this;
}
virtual void OnWebstoreParseFailure(
const std::string& id,
InstallHelperResultCode result_code,
const std::string& error_message) override {
ReportFailure();
}
base::WeakPtr<KioskAppData> client_;
DISALLOW_COPY_AND_ASSIGN(WebstoreDataParser);
};
////////////////////////////////////////////////////////////////////////////////
// KioskAppData
KioskAppData::KioskAppData(KioskAppDataDelegate* delegate,
const std::string& app_id,
const std::string& user_id)
: delegate_(delegate),
status_(STATUS_INIT),
app_id_(app_id),
user_id_(user_id) {
}
KioskAppData::~KioskAppData() {}
void KioskAppData::Load() {
SetStatus(STATUS_LOADING);
if (LoadFromCache())
return;
StartFetch();
}
void KioskAppData::ClearCache() {
PrefService* local_state = g_browser_process->local_state();
DictionaryPrefUpdate dict_update(local_state,
KioskAppManager::kKioskDictionaryName);
std::string app_key = std::string(KioskAppManager::kKeyApps) + '.' + app_id_;
dict_update->Remove(app_key, NULL);
if (!icon_path_.empty()) {
BrowserThread::PostBlockingPoolTask(
FROM_HERE,
base::Bind(base::IgnoreResult(&base::DeleteFile), icon_path_, false));
}
}
void KioskAppData::LoadFromInstalledApp(Profile* profile,
const extensions::Extension* app) {
SetStatus(STATUS_LOADING);
if (!app) {
app = extensions::ExtensionSystem::Get(profile)
->extension_service()
->GetInstalledExtension(app_id_);
}
DCHECK_EQ(app_id_, app->id());
name_ = app->name();
const int kIconSize = extension_misc::EXTENSION_ICON_LARGE;
extensions::ExtensionResource image = extensions::IconsInfo::GetIconResource(
app, kIconSize, ExtensionIconSet::MATCH_BIGGER);
extensions::ImageLoader::Get(profile)->LoadImageAsync(
app, image, gfx::Size(kIconSize, kIconSize),
base::Bind(&KioskAppData::OnExtensionIconLoaded, AsWeakPtr()));
}
bool KioskAppData::IsLoading() const {
return status_ == STATUS_LOADING;
}
void KioskAppData::SetStatus(Status status) {
if (status_ == status)
return;
status_ = status;
if (!delegate_)
return;
switch (status_) {
case STATUS_INIT:
break;
case STATUS_LOADING:
case STATUS_LOADED:
delegate_->OnKioskAppDataChanged(app_id_);
break;
case STATUS_ERROR:
delegate_->OnKioskAppDataLoadFailure(app_id_);
break;
}
}
net::URLRequestContextGetter* KioskAppData::GetRequestContextGetter() {
return g_browser_process->system_request_context();
}
bool KioskAppData::LoadFromCache() {
std::string app_key = std::string(KioskAppManager::kKeyApps) + '.' + app_id_;
std::string name_key = app_key + '.' + kKeyName;
std::string icon_path_key = app_key + '.' + kKeyIcon;
PrefService* local_state = g_browser_process->local_state();
const base::DictionaryValue* dict =
local_state->GetDictionary(KioskAppManager::kKioskDictionaryName);
icon_path_.clear();
std::string icon_path_string;
if (!dict->GetString(name_key, &name_) ||
!dict->GetString(icon_path_key, &icon_path_string)) {
return false;
}
icon_path_ = base::FilePath(icon_path_string);
// IconLoader deletes itself when done.
(new IconLoader(AsWeakPtr(), icon_path_))->Start();
return true;
}
void KioskAppData::SetCache(const std::string& name,
const base::FilePath& icon_path) {
std::string app_key = std::string(KioskAppManager::kKeyApps) + '.' + app_id_;
std::string name_key = app_key + '.' + kKeyName;
std::string icon_path_key = app_key + '.' + kKeyIcon;
PrefService* local_state = g_browser_process->local_state();
DictionaryPrefUpdate dict_update(local_state,
KioskAppManager::kKioskDictionaryName);
dict_update->SetString(name_key, name);
dict_update->SetString(icon_path_key, icon_path.value());
icon_path_ = icon_path;
}
void KioskAppData::SetCache(const std::string& name, const SkBitmap& icon) {
icon_ = gfx::ImageSkia::CreateFrom1xBitmap(icon);
icon_.MakeThreadSafe();
std::vector<unsigned char> image_data;
CHECK(gfx::PNGCodec::EncodeBGRASkBitmap(icon, false, &image_data));
raw_icon_ = new base::RefCountedString;
raw_icon_->data().assign(image_data.begin(), image_data.end());
base::FilePath cache_dir;
if (delegate_)
delegate_->GetKioskAppIconCacheDir(&cache_dir);
base::FilePath icon_path =
cache_dir.AppendASCII(app_id_).AddExtension(kIconFileExtension);
BrowserThread::GetBlockingPool()->PostTask(
FROM_HERE,
base::Bind(&SaveIconToLocalOnBlockingPool, icon_path, raw_icon_));
SetCache(name, icon_path);
}
void KioskAppData::OnExtensionIconLoaded(const gfx::Image& icon) {
if (icon.IsEmpty()) {
LOG(WARNING) << "Failed to load icon from installed app"
<< ", id=" << app_id_;
SetCache(name_, *extensions::util::GetDefaultAppIcon().bitmap());
} else {
SetCache(name_, icon.AsBitmap());
}
SetStatus(STATUS_LOADED);
}
void KioskAppData::OnIconLoadSuccess(
const scoped_refptr<base::RefCountedString>& raw_icon,
const gfx::ImageSkia& icon) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
raw_icon_ = raw_icon;
icon_ = icon;
SetStatus(STATUS_LOADED);
}
void KioskAppData::OnIconLoadFailure() {
// Re-fetch data from web store when failed to load cached data.
StartFetch();
}
void KioskAppData::OnWebstoreParseSuccess(const SkBitmap& icon) {
SetCache(name_, icon);
SetStatus(STATUS_LOADED);
}
void KioskAppData::OnWebstoreParseFailure() {
SetStatus(STATUS_ERROR);
}
void KioskAppData::StartFetch() {
webstore_fetcher_.reset(new extensions::WebstoreDataFetcher(
this,
GetRequestContextGetter(),
GURL(),
app_id_));
webstore_fetcher_->set_max_auto_retries(3);
webstore_fetcher_->Start();
}
void KioskAppData::OnWebstoreRequestFailure() {
SetStatus(STATUS_ERROR);
}
void KioskAppData::OnWebstoreResponseParseSuccess(
scoped_ptr<base::DictionaryValue> webstore_data) {
// Takes ownership of |webstore_data|.
webstore_fetcher_.reset();
std::string manifest;
if (!CheckResponseKeyValue(webstore_data.get(), kManifestKey, &manifest))
return;
if (!CheckResponseKeyValue(webstore_data.get(), kLocalizedNameKey, &name_))
return;
std::string icon_url_string;
if (!CheckResponseKeyValue(webstore_data.get(), kIconUrlKey,
&icon_url_string))
return;
GURL icon_url = GURL(extension_urls::GetWebstoreLaunchURL()).Resolve(
icon_url_string);
if (!icon_url.is_valid()) {
LOG(ERROR) << "Webstore response error (icon url): "
<< ValueToString(webstore_data.get());
OnWebstoreResponseParseFailure(kInvalidWebstoreResponseError);
return;
}
// WebstoreDataParser deletes itself when done.
(new WebstoreDataParser(AsWeakPtr()))->Start(app_id_,
manifest,
icon_url,
GetRequestContextGetter());
}
void KioskAppData::OnWebstoreResponseParseFailure(const std::string& error) {
LOG(ERROR) << "Webstore failed for kiosk app " << app_id_
<< ", " << error;
webstore_fetcher_.reset();
SetStatus(STATUS_ERROR);
}
bool KioskAppData::CheckResponseKeyValue(const base::DictionaryValue* response,
const char* key,
std::string* value) {
if (!response->GetString(key, value)) {
LOG(ERROR) << "Webstore response error (" << key
<< "): " << ValueToString(response);
OnWebstoreResponseParseFailure(kInvalidWebstoreResponseError);
return false;
}
return true;
}
} // namespace chromeos
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