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// 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/upgrade_detector_impl.h"
#include <string>
#include "base/bind.h"
#include "base/build_time.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/singleton.h"
#include "base/path_service.h"
#include "base/process/launch.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "base/version.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/google/google_util.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/chrome_version_info.h"
#include "content/public/browser/browser_thread.h"
#include "ui/base/resource/resource_bundle.h"
#if defined(OS_WIN)
#include "chrome/installer/util/browser_distribution.h"
#include "chrome/installer/util/google_update_settings.h"
#include "chrome/installer/util/helper.h"
#include "chrome/installer/util/install_util.h"
#elif defined(OS_MACOSX)
#include "chrome/browser/mac/keystone_glue.h"
#elif defined(OS_POSIX)
#include "base/process/launch.h"
#endif
using content::BrowserThread;
namespace {
// How long (in milliseconds) to wait (each cycle) before checking whether
// Chrome's been upgraded behind our back.
const int kCheckForUpgradeMs = 2 * 60 * 60 * 1000; // 2 hours.
// How long to wait (each cycle) before checking which severity level we should
// be at. Once we reach the highest severity, the timer will stop.
const int kNotifyCycleTimeMs = 20 * 60 * 1000; // 20 minutes.
// Same as kNotifyCycleTimeMs but only used during testing.
const int kNotifyCycleTimeForTestingMs = 500; // Half a second.
// The number of days after which we identify a build/install as outdated.
const uint64 kOutdatedBuildAgeInDays = 12 * 7;
std::string CmdLineInterval() {
const CommandLine& cmd_line = *CommandLine::ForCurrentProcess();
return cmd_line.GetSwitchValueASCII(switches::kCheckForUpdateIntervalSec);
}
bool IsTesting() {
const CommandLine& cmd_line = *CommandLine::ForCurrentProcess();
return cmd_line.HasSwitch(switches::kSimulateUpgrade) ||
cmd_line.HasSwitch(switches::kCheckForUpdateIntervalSec) ||
cmd_line.HasSwitch(switches::kSimulateCriticalUpdate) ||
cmd_line.HasSwitch(switches::kSimulateOutdated);
}
// How often to check for an upgrade.
int GetCheckForUpgradeEveryMs() {
// Check for a value passed via the command line.
int interval_ms;
std::string interval = CmdLineInterval();
if (!interval.empty() && base::StringToInt(interval, &interval_ms))
return interval_ms * 1000; // Command line value is in seconds.
return kCheckForUpgradeMs;
}
bool IsUnstableChannel() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
return channel == chrome::VersionInfo::CHANNEL_DEV ||
channel == chrome::VersionInfo::CHANNEL_CANARY;
}
// This task identifies whether we are running an unstable version. And then
// it unconditionally calls back the provided task.
void CheckForUnstableChannel(const base::Closure& callback_task,
bool* is_unstable_channel) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
*is_unstable_channel = IsUnstableChannel();
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE, callback_task);
}
#if defined(OS_WIN)
bool IsSystemInstall() {
// Get the version of the currently *installed* instance of Chrome,
// which might be newer than the *running* instance if we have been
// upgraded in the background.
base::FilePath exe_path;
if (!PathService::Get(base::DIR_EXE, &exe_path)) {
NOTREACHED() << "Failed to find executable path";
return false;
}
return !InstallUtil::IsPerUserInstall(exe_path.value().c_str());
}
// This task checks the update policy and calls back the task only if automatic
// updates are allowed. It also identifies whether we are running an unstable
// channel.
void DetectUpdatability(const base::Closure& callback_task,
bool* is_unstable_channel) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::string16 app_guid = installer::GetAppGuidForUpdates(IsSystemInstall());
DCHECK(!app_guid.empty());
if (GoogleUpdateSettings::AUTOMATIC_UPDATES ==
GoogleUpdateSettings::GetAppUpdatePolicy(app_guid, NULL)) {
CheckForUnstableChannel(callback_task, is_unstable_channel);
}
}
#endif // defined(OS_WIN)
} // namespace
UpgradeDetectorImpl::UpgradeDetectorImpl()
: weak_factory_(this),
is_unstable_channel_(false),
build_date_(base::GetBuildTime()) {
CommandLine command_line(*CommandLine::ForCurrentProcess());
// The different command line switches that affect testing can't be used
// simultaneously, if they do, here's the precedence order, based on the order
// of the if statements below:
// - kDisableBackgroundNetworking prevents any of the other command line
// switch from being taken into account.
// - kSimulateUpgrade supersedes critical or outdated upgrade switches.
// - kSimulateCriticalUpdate has precedence over kSimulateOutdated.
// - kSimulateOutdated can work on its own, or with a specified date.
if (command_line.HasSwitch(switches::kDisableBackgroundNetworking))
return;
if (command_line.HasSwitch(switches::kSimulateUpgrade)) {
UpgradeDetected(UPGRADE_AVAILABLE_REGULAR);
return;
}
if (command_line.HasSwitch(switches::kSimulateCriticalUpdate)) {
UpgradeDetected(UPGRADE_AVAILABLE_CRITICAL);
return;
}
if (command_line.HasSwitch(switches::kSimulateOutdated)) {
// The outdated simulation can work without a value, which means outdated
// now, or with a value that must be a well formed date/time string that
// overrides the build date.
// Also note that to test with a given time/date, until the network time
// tracking moves off of the VariationsService, the "variations-server-url"
// command line switch must also be specified for the service to be
// available on non GOOGLE_CHROME_BUILD.
std::string build_date = command_line.GetSwitchValueASCII(
switches::kSimulateOutdated);
base::Time maybe_build_time;
bool result = base::Time::FromString(build_date.c_str(), &maybe_build_time);
if (result && !maybe_build_time.is_null()) {
// We got a valid build date simulation so use it and check for upgrades.
build_date_ = maybe_build_time;
StartTimerForUpgradeCheck();
} else {
// Without a valid date, we simulate that we are already outdated...
UpgradeDetected(UPGRADE_NEEDED_OUTDATED_INSTALL);
}
return;
}
// Windows: only enable upgrade notifications for official builds.
// Mac: only enable them if the updater (Keystone) is present.
// Linux (and other POSIX): always enable regardless of branding.
base::Closure start_upgrade_check_timer_task =
base::Bind(&UpgradeDetectorImpl::StartTimerForUpgradeCheck,
weak_factory_.GetWeakPtr());
#if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
// On Windows, there might be a policy preventing updates, so validate
// updatability, and then call StartTimerForUpgradeCheck appropriately.
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&DetectUpdatability,
start_upgrade_check_timer_task,
&is_unstable_channel_));
return;
#elif defined(OS_WIN) && !defined(GOOGLE_CHROME_BUILD)
return; // Chromium has no upgrade channel.
#elif defined(OS_MACOSX)
if (!keystone_glue::KeystoneEnabled())
return; // Keystone updater not enabled.
#elif !defined(OS_POSIX)
return;
#endif
// Check whether the build is an unstable channel before starting the timer.
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&CheckForUnstableChannel,
start_upgrade_check_timer_task,
&is_unstable_channel_));
// Start tracking network time updates.
network_time_tracker_.Start();
}
UpgradeDetectorImpl::~UpgradeDetectorImpl() {
}
// Static
// This task checks the currently running version of Chrome against the
// installed version. If the installed version is newer, it calls back
// UpgradeDetectorImpl::UpgradeDetected using a weak pointer so that it can
// be interrupted from the UI thread.
void UpgradeDetectorImpl::DetectUpgradeTask(
base::WeakPtr<UpgradeDetectorImpl> upgrade_detector) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
Version installed_version;
Version critical_update;
#if defined(OS_WIN)
// Get the version of the currently *installed* instance of Chrome,
// which might be newer than the *running* instance if we have been
// upgraded in the background.
bool system_install = IsSystemInstall();
// TODO(tommi): Check if using the default distribution is always the right
// thing to do.
BrowserDistribution* dist = BrowserDistribution::GetDistribution();
InstallUtil::GetChromeVersion(dist, system_install, &installed_version);
if (installed_version.IsValid()) {
InstallUtil::GetCriticalUpdateVersion(dist, system_install,
&critical_update);
}
#elif defined(OS_MACOSX)
installed_version =
Version(base::UTF16ToASCII(keystone_glue::CurrentlyInstalledVersion()));
#elif defined(OS_POSIX)
// POSIX but not Mac OS X: Linux, etc.
CommandLine command_line(*CommandLine::ForCurrentProcess());
command_line.AppendSwitch(switches::kProductVersion);
std::string reply;
if (!base::GetAppOutput(command_line, &reply)) {
DLOG(ERROR) << "Failed to get current file version";
return;
}
installed_version = Version(reply);
#endif
// Get the version of the currently *running* instance of Chrome.
chrome::VersionInfo version_info;
if (!version_info.is_valid()) {
NOTREACHED() << "Failed to get current file version";
return;
}
Version running_version(version_info.Version());
if (!running_version.IsValid()) {
NOTREACHED();
return;
}
// |installed_version| may be NULL when the user downgrades on Linux (by
// switching from dev to beta channel, for example). The user needs a
// restart in this case as well. See http://crbug.com/46547
if (!installed_version.IsValid() ||
(installed_version.CompareTo(running_version) > 0)) {
// If a more recent version is available, it might be that we are lacking
// a critical update, such as a zero-day fix.
UpgradeAvailable upgrade_available = UPGRADE_AVAILABLE_REGULAR;
if (critical_update.IsValid() &&
critical_update.CompareTo(running_version) > 0) {
upgrade_available = UPGRADE_AVAILABLE_CRITICAL;
}
// Fire off the upgrade detected task.
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(&UpgradeDetectorImpl::UpgradeDetected,
upgrade_detector,
upgrade_available));
}
}
void UpgradeDetectorImpl::StartTimerForUpgradeCheck() {
detect_upgrade_timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(GetCheckForUpgradeEveryMs()),
this, &UpgradeDetectorImpl::CheckForUpgrade);
}
void UpgradeDetectorImpl::CheckForUpgrade() {
// Interrupt any (unlikely) unfinished execution of DetectUpgradeTask, or at
// least prevent the callback from being executed, because we will potentially
// call it from within DetectOutdatedInstall() or will post
// DetectUpgradeTask again below anyway.
weak_factory_.InvalidateWeakPtrs();
// No need to look for upgrades if the install is outdated.
if (DetectOutdatedInstall())
return;
// We use FILE as the thread to run the upgrade detection code on all
// platforms. For Linux, this is because we don't want to block the UI thread
// while launching a background process and reading its output; on the Mac and
// on Windows checking for an upgrade requires reading a file.
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
base::Bind(&UpgradeDetectorImpl::DetectUpgradeTask,
weak_factory_.GetWeakPtr()));
}
bool UpgradeDetectorImpl::DetectOutdatedInstall() {
// Only enable the outdated install check if we are running the trial for it,
// unless we are simulating an outdated isntall.
static bool simulate_outdated = CommandLine::ForCurrentProcess()->HasSwitch(
switches::kSimulateOutdated);
if (!simulate_outdated) {
// Also don't show the bubble if we have a brand code that is NOT organic.
std::string brand;
if (google_util::GetBrand(&brand) && !google_util::IsOrganic(brand))
return false;
}
base::Time network_time;
base::TimeDelta uncertainty;
if (!network_time_tracker_.GetNetworkTime(base::TimeTicks::Now(),
&network_time,
&uncertainty)) {
return false;
}
if (network_time.is_null() || build_date_.is_null() ||
build_date_ > network_time) {
NOTREACHED();
return false;
}
if (network_time - build_date_ >
base::TimeDelta::FromDays(kOutdatedBuildAgeInDays)) {
UpgradeDetected(UPGRADE_NEEDED_OUTDATED_INSTALL);
return true;
}
// If we simlated an outdated install with a date, we don't want to keep
// checking for version upgrades, which happens on non-official builds.
return simulate_outdated;
}
void UpgradeDetectorImpl::UpgradeDetected(UpgradeAvailable upgrade_available) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
upgrade_available_ = upgrade_available;
// Stop the recurring timer (that is checking for changes).
detect_upgrade_timer_.Stop();
NotifyUpgradeDetected();
// Start the repeating timer for notifying the user after a certain period.
// The called function will eventually figure out that enough time has passed
// and stop the timer.
int cycle_time = IsTesting() ?
kNotifyCycleTimeForTestingMs : kNotifyCycleTimeMs;
upgrade_notification_timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(cycle_time),
this, &UpgradeDetectorImpl::NotifyOnUpgrade);
}
void UpgradeDetectorImpl::NotifyOnUpgrade() {
base::TimeDelta delta = base::Time::Now() - upgrade_detected_time();
// We'll make testing more convenient by switching to seconds of waiting
// instead of days between flipping severity.
bool is_testing = IsTesting();
int64 time_passed = is_testing ? delta.InSeconds() : delta.InHours();
bool is_critical_or_outdated = upgrade_available_ > UPGRADE_AVAILABLE_REGULAR;
if (is_unstable_channel_) {
// There's only one threat level for unstable channels like dev and
// canary, and it hits after one hour. During testing, it hits after one
// second.
const int kUnstableThreshold = 1;
if (is_critical_or_outdated)
set_upgrade_notification_stage(UPGRADE_ANNOYANCE_CRITICAL);
else if (time_passed >= kUnstableThreshold) {
set_upgrade_notification_stage(UPGRADE_ANNOYANCE_LOW);
// That's as high as it goes.
upgrade_notification_timer_.Stop();
} else {
return; // Not ready to recommend upgrade.
}
} else {
const int kMultiplier = is_testing ? 10 : 24;
// 14 days when not testing, otherwise 14 seconds.
const int kSevereThreshold = 14 * kMultiplier;
const int kHighThreshold = 7 * kMultiplier;
const int kElevatedThreshold = 4 * kMultiplier;
const int kLowThreshold = 2 * kMultiplier;
// These if statements must be sorted (highest interval first).
if (time_passed >= kSevereThreshold || is_critical_or_outdated) {
set_upgrade_notification_stage(
is_critical_or_outdated ? UPGRADE_ANNOYANCE_CRITICAL :
UPGRADE_ANNOYANCE_SEVERE);
// We can't get any higher, baby.
upgrade_notification_timer_.Stop();
} else if (time_passed >= kHighThreshold) {
set_upgrade_notification_stage(UPGRADE_ANNOYANCE_HIGH);
} else if (time_passed >= kElevatedThreshold) {
set_upgrade_notification_stage(UPGRADE_ANNOYANCE_ELEVATED);
} else if (time_passed >= kLowThreshold) {
set_upgrade_notification_stage(UPGRADE_ANNOYANCE_LOW);
} else {
return; // Not ready to recommend upgrade.
}
}
NotifyUpgradeRecommended();
}
// static
UpgradeDetectorImpl* UpgradeDetectorImpl::GetInstance() {
return Singleton<UpgradeDetectorImpl>::get();
}
// static
UpgradeDetector* UpgradeDetector::GetInstance() {
return UpgradeDetectorImpl::GetInstance();
}
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