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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/apps/ephemeral_app_launcher.h"
#include "base/command_line.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/extensions/extension_install_checker.h"
#include "chrome/browser/extensions/extension_install_prompt.h"
#include "chrome/browser/extensions/extension_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/browser/ui/extensions/app_launch_params.h"
#include "chrome/browser/ui/extensions/application_launch.h"
#include "chrome/browser/ui/extensions/extension_enable_flow.h"
#include "chrome/browser/ui/native_window_tracker.h"
#include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_system.h"
#include "extensions/browser/management_policy.h"
#include "extensions/common/constants.h"
#include "extensions/common/permissions/permissions_data.h"
#include "ui/app_list/app_list_switches.h"
using content::WebContents;
using extensions::Extension;
using extensions::ExtensionInstallChecker;
using extensions::ExtensionPrefs;
using extensions::ExtensionRegistry;
using extensions::ExtensionSystem;
using extensions::ManagementPolicy;
using extensions::WebstoreInstaller;
namespace webstore_install = extensions::webstore_install;
namespace {
const char kInvalidManifestError[] = "Invalid manifest";
const char kExtensionTypeError[] = "Not an app";
const char kAppTypeError[] = "Ephemeral legacy packaged apps not supported";
const char kUserCancelledError[] = "Launch cancelled by the user";
const char kBlacklistedError[] = "App is blacklisted for malware";
const char kRequirementsError[] = "App has missing requirements";
const char kFeatureDisabledError[] = "Launching ephemeral apps is not enabled";
const char kMissingAppError[] = "App is not installed";
const char kAppDisabledError[] = "App is disabled";
Profile* ProfileForWebContents(content::WebContents* contents) {
if (!contents)
return NULL;
return Profile::FromBrowserContext(contents->GetBrowserContext());
}
gfx::NativeWindow NativeWindowForWebContents(content::WebContents* contents) {
if (!contents)
return NULL;
return contents->GetTopLevelNativeWindow();
}
// Check whether an extension can be launched. The extension does not need to
// be currently installed.
bool CheckCommonLaunchCriteria(Profile* profile,
const Extension* extension,
webstore_install::Result* reason,
std::string* error) {
// Only apps can be launched.
if (!extension->is_app()) {
*reason = webstore_install::LAUNCH_UNSUPPORTED_EXTENSION_TYPE;
*error = kExtensionTypeError;
return false;
}
// Do not launch apps blocked by management policies.
ManagementPolicy* management_policy =
ExtensionSystem::Get(profile)->management_policy();
base::string16 policy_error;
if (!management_policy->UserMayLoad(extension, &policy_error)) {
*reason = webstore_install::BLOCKED_BY_POLICY;
*error = base::UTF16ToUTF8(policy_error);
return false;
}
return true;
}
} // namespace
// static
bool EphemeralAppLauncher::IsFeatureEnabled() {
return base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableEphemeralAppsInWebstore);
}
// static
scoped_refptr<EphemeralAppLauncher> EphemeralAppLauncher::CreateForLauncher(
const std::string& webstore_item_id,
Profile* profile,
gfx::NativeWindow parent_window,
const LaunchCallback& callback) {
scoped_refptr<EphemeralAppLauncher> installer =
new EphemeralAppLauncher(webstore_item_id,
profile,
parent_window,
callback);
installer->set_install_source(WebstoreInstaller::INSTALL_SOURCE_APP_LAUNCHER);
return installer;
}
// static
scoped_refptr<EphemeralAppLauncher> EphemeralAppLauncher::CreateForWebContents(
const std::string& webstore_item_id,
content::WebContents* web_contents,
const LaunchCallback& callback) {
scoped_refptr<EphemeralAppLauncher> installer =
new EphemeralAppLauncher(webstore_item_id, web_contents, callback);
installer->set_install_source(WebstoreInstaller::INSTALL_SOURCE_OTHER);
return installer;
}
void EphemeralAppLauncher::Start() {
if (!IsFeatureEnabled()) {
InvokeCallback(webstore_install::LAUNCH_FEATURE_DISABLED,
kFeatureDisabledError);
return;
}
// Check whether the app already exists in extension system before downloading
// from the webstore.
const Extension* extension =
ExtensionRegistry::Get(profile())
->GetExtensionById(id(), ExtensionRegistry::EVERYTHING);
if (extension) {
webstore_install::Result result = webstore_install::OTHER_ERROR;
std::string error;
if (!CanLaunchInstalledApp(extension, &result, &error)) {
InvokeCallback(result, error);
return;
}
if (extensions::util::IsAppLaunchableWithoutEnabling(extension->id(),
profile())) {
LaunchApp(extension);
InvokeCallback(webstore_install::SUCCESS, std::string());
return;
}
EnableInstalledApp(extension);
return;
}
// Install the app ephemerally and launch when complete.
BeginInstall();
}
EphemeralAppLauncher::EphemeralAppLauncher(const std::string& webstore_item_id,
Profile* profile,
gfx::NativeWindow parent_window,
const LaunchCallback& callback)
: WebstoreStandaloneInstaller(webstore_item_id, profile, Callback()),
launch_callback_(callback),
parent_window_(parent_window),
dummy_web_contents_(
WebContents::Create(WebContents::CreateParams(profile))) {
if (parent_window_)
parent_window_tracker_ = NativeWindowTracker::Create(parent_window);
}
EphemeralAppLauncher::EphemeralAppLauncher(const std::string& webstore_item_id,
content::WebContents* web_contents,
const LaunchCallback& callback)
: WebstoreStandaloneInstaller(webstore_item_id,
ProfileForWebContents(web_contents),
Callback()),
content::WebContentsObserver(web_contents),
launch_callback_(callback),
parent_window_(NativeWindowForWebContents(web_contents)) {
}
EphemeralAppLauncher::~EphemeralAppLauncher() {}
scoped_ptr<extensions::ExtensionInstallChecker>
EphemeralAppLauncher::CreateInstallChecker() {
return make_scoped_ptr(new ExtensionInstallChecker(profile()));
}
scoped_ptr<ExtensionInstallPrompt> EphemeralAppLauncher::CreateInstallUI() {
if (web_contents())
return make_scoped_ptr(new ExtensionInstallPrompt(web_contents()));
return make_scoped_ptr(new ExtensionInstallPrompt(profile(), parent_window_));
}
scoped_ptr<WebstoreInstaller::Approval> EphemeralAppLauncher::CreateApproval()
const {
scoped_ptr<WebstoreInstaller::Approval> approval =
WebstoreStandaloneInstaller::CreateApproval();
approval->is_ephemeral = true;
return approval.Pass();
}
bool EphemeralAppLauncher::CanLaunchInstalledApp(
const extensions::Extension* extension,
webstore_install::Result* reason,
std::string* error) {
if (!CheckCommonLaunchCriteria(profile(), extension, reason, error))
return false;
// Do not launch blacklisted apps.
if (ExtensionPrefs::Get(profile())->IsExtensionBlacklisted(extension->id())) {
*reason = webstore_install::BLACKLISTED;
*error = kBlacklistedError;
return false;
}
// If the app has missing requirements, it cannot be launched.
if (!extensions::util::IsAppLaunchable(extension->id(), profile())) {
*reason = webstore_install::REQUIREMENT_VIOLATIONS;
*error = kRequirementsError;
return false;
}
return true;
}
void EphemeralAppLauncher::EnableInstalledApp(const Extension* extension) {
// Check whether an install is already in progress.
webstore_install::Result result = webstore_install::OTHER_ERROR;
std::string error;
if (!EnsureUniqueInstall(&result, &error)) {
InvokeCallback(result, error);
return;
}
// Keep this object alive until the enable flow is complete. Either
// ExtensionEnableFlowFinished() or ExtensionEnableFlowAborted() will be
// called.
AddRef();
extension_enable_flow_.reset(
new ExtensionEnableFlow(profile(), extension->id(), this));
if (web_contents())
extension_enable_flow_->StartForWebContents(web_contents());
else
extension_enable_flow_->StartForNativeWindow(parent_window_);
}
void EphemeralAppLauncher::MaybeLaunchApp() {
webstore_install::Result result = webstore_install::OTHER_ERROR;
std::string error;
ExtensionRegistry* registry = ExtensionRegistry::Get(profile());
const Extension* extension =
registry->GetExtensionById(id(), ExtensionRegistry::EVERYTHING);
if (extension) {
// Although the installation was successful, the app may not be
// launchable.
if (registry->enabled_extensions().Contains(extension->id())) {
result = webstore_install::SUCCESS;
LaunchApp(extension);
} else {
error = kAppDisabledError;
// Determine why the app cannot be launched.
CanLaunchInstalledApp(extension, &result, &error);
}
} else {
// The extension must be present in the registry if installed.
NOTREACHED();
error = kMissingAppError;
}
InvokeCallback(result, error);
}
void EphemeralAppLauncher::LaunchApp(const Extension* extension) const {
DCHECK(extension && extension->is_app() &&
ExtensionRegistry::Get(profile())
->GetExtensionById(extension->id(), ExtensionRegistry::ENABLED));
AppLaunchParams params(profile(), extension, NEW_FOREGROUND_TAB,
extensions::SOURCE_EPHEMERAL_APP);
params.desktop_type =
chrome::GetHostDesktopTypeForNativeWindow(parent_window_);
OpenApplication(params);
}
bool EphemeralAppLauncher::LaunchHostedApp(const Extension* extension) const {
GURL launch_url = extensions::AppLaunchInfo::GetLaunchWebURL(extension);
if (!launch_url.is_valid())
return false;
chrome::ScopedTabbedBrowserDisplayer displayer(
profile(), chrome::GetHostDesktopTypeForNativeWindow(parent_window_));
chrome::NavigateParams params(
displayer.browser(), launch_url, ui::PAGE_TRANSITION_AUTO_TOPLEVEL);
params.disposition = NEW_FOREGROUND_TAB;
chrome::Navigate(¶ms);
return true;
}
void EphemeralAppLauncher::InvokeCallback(webstore_install::Result result,
const std::string& error) {
if (!launch_callback_.is_null()) {
LaunchCallback callback = launch_callback_;
launch_callback_.Reset();
callback.Run(result, error);
}
}
void EphemeralAppLauncher::AbortLaunch(webstore_install::Result result,
const std::string& error) {
InvokeCallback(result, error);
WebstoreStandaloneInstaller::CompleteInstall(result, error);
}
void EphemeralAppLauncher::CheckEphemeralInstallPermitted() {
scoped_refptr<const Extension> extension = GetLocalizedExtensionForDisplay();
DCHECK(extension.get()); // Checked in OnManifestParsed().
install_checker_ = CreateInstallChecker();
DCHECK(install_checker_.get());
install_checker_->set_extension(extension);
install_checker_->Start(ExtensionInstallChecker::CHECK_BLACKLIST |
ExtensionInstallChecker::CHECK_REQUIREMENTS,
true,
base::Bind(&EphemeralAppLauncher::OnInstallChecked,
base::Unretained(this)));
}
void EphemeralAppLauncher::OnInstallChecked(int check_failures) {
if (!CheckRequestorAlive()) {
AbortLaunch(webstore_install::OTHER_ERROR, std::string());
return;
}
if (install_checker_->blacklist_state() == extensions::BLACKLISTED_MALWARE) {
AbortLaunch(webstore_install::BLACKLISTED, kBlacklistedError);
return;
}
if (!install_checker_->requirement_errors().empty()) {
AbortLaunch(webstore_install::REQUIREMENT_VIOLATIONS,
install_checker_->requirement_errors().front());
return;
}
// Proceed with the normal install flow.
ProceedWithInstallPrompt();
}
void EphemeralAppLauncher::InitInstallData(
extensions::ActiveInstallData* install_data) const {
install_data->is_ephemeral = true;
}
bool EphemeralAppLauncher::CheckRequestorAlive() const {
if (!parent_window_) {
// Assume the requestor is always alive if |parent_window_| is null.
return true;
}
return (web_contents() != nullptr ||
(parent_window_tracker_ &&
!parent_window_tracker_->WasNativeWindowClosed()));
}
const GURL& EphemeralAppLauncher::GetRequestorURL() const {
return GURL::EmptyGURL();
}
bool EphemeralAppLauncher::ShouldShowPostInstallUI() const {
return false;
}
bool EphemeralAppLauncher::ShouldShowAppInstalledBubble() const {
return false;
}
WebContents* EphemeralAppLauncher::GetWebContents() const {
return web_contents() ? web_contents() : dummy_web_contents_.get();
}
scoped_refptr<ExtensionInstallPrompt::Prompt>
EphemeralAppLauncher::CreateInstallPrompt() const {
const Extension* extension = localized_extension_for_display();
DCHECK(extension); // Checked in OnManifestParsed().
// Skip the prompt by returning null if the app does not need to display
// permission warnings.
extensions::PermissionMessages permissions =
extension->permissions_data()->GetPermissionMessages();
if (permissions.empty())
return NULL;
return make_scoped_refptr(new ExtensionInstallPrompt::Prompt(
ExtensionInstallPrompt::LAUNCH_PROMPT));
}
bool EphemeralAppLauncher::CheckInlineInstallPermitted(
const base::DictionaryValue& webstore_data,
std::string* error) const {
*error = "";
return true;
}
bool EphemeralAppLauncher::CheckRequestorPermitted(
const base::DictionaryValue& webstore_data,
std::string* error) const {
*error = "";
return true;
}
void EphemeralAppLauncher::OnManifestParsed() {
scoped_refptr<const Extension> extension = GetLocalizedExtensionForDisplay();
if (!extension.get()) {
AbortLaunch(webstore_install::INVALID_MANIFEST, kInvalidManifestError);
return;
}
webstore_install::Result result = webstore_install::OTHER_ERROR;
std::string error;
if (!CheckCommonLaunchCriteria(profile(), extension.get(), &result, &error)) {
AbortLaunch(result, error);
return;
}
if (extension->is_legacy_packaged_app()) {
AbortLaunch(webstore_install::LAUNCH_UNSUPPORTED_EXTENSION_TYPE,
kAppTypeError);
return;
}
if (extension->is_hosted_app()) {
// Hosted apps do not need to be installed ephemerally. Just navigate to
// their launch url.
if (LaunchHostedApp(extension.get()))
AbortLaunch(webstore_install::SUCCESS, std::string());
else
AbortLaunch(webstore_install::INVALID_MANIFEST, kInvalidManifestError);
return;
}
CheckEphemeralInstallPermitted();
}
void EphemeralAppLauncher::CompleteInstall(webstore_install::Result result,
const std::string& error) {
if (result == webstore_install::SUCCESS)
MaybeLaunchApp();
else if (!launch_callback_.is_null())
InvokeCallback(result, error);
WebstoreStandaloneInstaller::CompleteInstall(result, error);
}
void EphemeralAppLauncher::WebContentsDestroyed() {
launch_callback_.Reset();
AbortInstall();
}
void EphemeralAppLauncher::ExtensionEnableFlowFinished() {
MaybeLaunchApp();
// CompleteInstall will call Release.
WebstoreStandaloneInstaller::CompleteInstall(webstore_install::SUCCESS,
std::string());
}
void EphemeralAppLauncher::ExtensionEnableFlowAborted(bool user_initiated) {
// CompleteInstall will call Release.
CompleteInstall(webstore_install::USER_CANCELLED, kUserCancelledError);
}
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