| // 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/extensions/installed_loader.h" |
| |
| #include "base/files/file_path.h" |
| #include "base/metrics/histogram.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "base/values.h" |
| #include "chrome/browser/browser_process.h" |
| #include "chrome/browser/extensions/api/runtime/runtime_api.h" |
| #include "chrome/browser/extensions/extension_action_manager.h" |
| #include "chrome/browser/extensions/extension_prefs.h" |
| #include "chrome/browser/extensions/extension_service.h" |
| #include "chrome/browser/extensions/extension_system.h" |
| #include "chrome/browser/extensions/management_policy.h" |
| #include "chrome/browser/profiles/profile_manager.h" |
| #include "chrome/common/chrome_switches.h" |
| #include "chrome/common/extensions/api/managed_mode_private/managed_mode_handler.h" |
| #include "chrome/common/extensions/background_info.h" |
| #include "chrome/common/extensions/extension.h" |
| #include "chrome/common/extensions/extension_file_util.h" |
| #include "chrome/common/extensions/extension_l10n_util.h" |
| #include "chrome/common/extensions/extension_manifest_constants.h" |
| #include "chrome/common/extensions/manifest_url_handler.h" |
| #include "chrome/common/pref_names.h" |
| #include "content/public/browser/notification_service.h" |
| #include "content/public/browser/user_metrics.h" |
| #include "extensions/common/manifest.h" |
| |
| using content::BrowserThread; |
| using content::UserMetricsAction; |
| using extensions::Extension; |
| using extensions::ExtensionInfo; |
| using extensions::Manifest; |
| |
| namespace errors = extension_manifest_errors; |
| |
| namespace extensions { |
| |
| namespace { |
| |
| // The following enumeration is used in histograms matching |
| // Extensions.ManifestReload* . Values may be added, as long as existing |
| // values are not changed. |
| enum ManifestReloadReason { |
| NOT_NEEDED = 0, // Reload not needed. |
| UNPACKED_DIR, // Unpacked directory. |
| NEEDS_RELOCALIZATION, // The locale has changed since we read this extension. |
| CORRUPT_PREFERENCES, // The manifest in the preferences is corrupt. |
| NUM_MANIFEST_RELOAD_REASONS |
| }; |
| |
| // Used in histogram Extension.BackgroundPageType. Values may be added, as |
| // long as existing values are not changed. |
| enum BackgroundPageType { |
| NO_BACKGROUND_PAGE = 0, |
| BACKGROUND_PAGE_PERSISTENT = 1, |
| EVENT_PAGE = 2, |
| }; |
| |
| // Used in histogram Extensions.ExternalItemState. Values may be added, as |
| // long as existing values are not changed. |
| enum ExternalItemState { |
| DEPRECATED_EXTERNAL_ITEM_DISABLED = 0, |
| DEPRECATED_EXTERNAL_ITEM_ENABLED = 1, |
| EXTERNAL_ITEM_WEBSTORE_DISABLED = 2, |
| EXTERNAL_ITEM_WEBSTORE_ENABLED = 3, |
| EXTERNAL_ITEM_NONWEBSTORE_DISABLED = 4, |
| EXTERNAL_ITEM_NONWEBSTORE_ENABLED = 5, |
| EXTERNAL_ITEM_WEBSTORE_UNINSTALLED = 6, |
| EXTERNAL_ITEM_NONWEBSTORE_UNINSTALLED = 7, |
| EXTERNAL_ITEM_MAX_ITEMS = 8 |
| }; |
| |
| bool IsManifestCorrupt(const DictionaryValue* manifest) { |
| if (!manifest) |
| return false; |
| |
| // Because of bug #272524 sometimes manifests got mangled in the preferences |
| // file, one particularly bad case resulting in having both a background page |
| // and background scripts values. In those situations we want to reload the |
| // manifest from the extension to fix this. |
| const Value* background_page; |
| const Value* background_scripts; |
| return manifest->Get(manifest_keys::kBackgroundPage, &background_page) && |
| manifest->Get(manifest_keys::kBackgroundScripts, &background_scripts); |
| } |
| |
| ManifestReloadReason ShouldReloadExtensionManifest(const ExtensionInfo& info) { |
| // Always reload manifests of unpacked extensions, because they can change |
| // on disk independent of the manifest in our prefs. |
| if (Manifest::IsUnpackedLocation(info.extension_location)) |
| return UNPACKED_DIR; |
| |
| // Reload the manifest if it needs to be relocalized. |
| if (extension_l10n_util::ShouldRelocalizeManifest( |
| info.extension_manifest.get())) |
| return NEEDS_RELOCALIZATION; |
| |
| // Reload if the copy of the manifest in the preferences is corrupt. |
| if (IsManifestCorrupt(info.extension_manifest.get())) |
| return CORRUPT_PREFERENCES; |
| |
| return NOT_NEEDED; |
| } |
| |
| BackgroundPageType GetBackgroundPageType(const Extension* extension) { |
| if (!BackgroundInfo::HasBackgroundPage(extension)) |
| return NO_BACKGROUND_PAGE; |
| if (BackgroundInfo::HasPersistentBackgroundPage(extension)) |
| return BACKGROUND_PAGE_PERSISTENT; |
| return EVENT_PAGE; |
| } |
| |
| void DispatchOnInstalledEvent( |
| Profile* profile, |
| const std::string& extension_id, |
| const Version& old_version, |
| bool chrome_updated) { |
| // profile manager can be NULL in unit tests. |
| if (!g_browser_process->profile_manager()) |
| return; |
| if (!g_browser_process->profile_manager()->IsValidProfile(profile)) |
| return; |
| |
| extensions::RuntimeEventRouter::DispatchOnInstalledEvent( |
| profile, extension_id, old_version, chrome_updated); |
| } |
| |
| } // namespace |
| |
| InstalledLoader::InstalledLoader(ExtensionService* extension_service) |
| : extension_service_(extension_service), |
| extension_prefs_(extension_service->extension_prefs()) { |
| } |
| |
| InstalledLoader::~InstalledLoader() { |
| } |
| |
| void InstalledLoader::Load(const ExtensionInfo& info, bool write_to_prefs) { |
| std::string error; |
| scoped_refptr<const Extension> extension(NULL); |
| if (info.extension_manifest) { |
| extension = Extension::Create( |
| info.extension_path, |
| info.extension_location, |
| *info.extension_manifest, |
| GetCreationFlags(&info), |
| &error); |
| } else { |
| error = errors::kManifestUnreadable; |
| } |
| |
| // Once installed, non-unpacked extensions cannot change their IDs (e.g., by |
| // updating the 'key' field in their manifest). |
| // TODO(jstritar): migrate preferences when unpacked extensions change IDs. |
| if (extension.get() && !Manifest::IsUnpackedLocation(extension->location()) && |
| info.extension_id != extension->id()) { |
| error = errors::kCannotChangeExtensionID; |
| extension = NULL; |
| content::RecordAction(UserMetricsAction("Extensions.IDChangedError")); |
| } |
| |
| // Check policy on every load in case an extension was blacklisted while |
| // Chrome was not running. |
| const ManagementPolicy* policy = extensions::ExtensionSystem::Get( |
| extension_service_->profile())->management_policy(); |
| if (extension.get() && !policy->UserMayLoad(extension.get(), NULL)) { |
| // The error message from UserMayInstall() often contains the extension ID |
| // and is therefore not well suited to this UI. |
| error = errors::kDisabledByPolicy; |
| extension = NULL; |
| } |
| |
| if (!extension.get()) { |
| extension_service_->ReportExtensionLoadError( |
| info.extension_path, error, false); |
| return; |
| } |
| |
| if (write_to_prefs) |
| extension_prefs_->UpdateManifest(extension.get()); |
| |
| extension_service_->AddExtension(extension.get()); |
| } |
| |
| void InstalledLoader::LoadAllExtensions() { |
| CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
| |
| base::TimeTicks start_time = base::TimeTicks::Now(); |
| |
| scoped_ptr<ExtensionPrefs::ExtensionsInfo> extensions_info( |
| extension_prefs_->GetInstalledExtensionsInfo()); |
| |
| std::vector<int> reload_reason_counts(NUM_MANIFEST_RELOAD_REASONS, 0); |
| bool should_write_prefs = false; |
| |
| for (size_t i = 0; i < extensions_info->size(); ++i) { |
| ExtensionInfo* info = extensions_info->at(i).get(); |
| |
| // Skip extensions that were loaded from the command-line because we don't |
| // want those to persist across browser restart. |
| if (info->extension_location == Manifest::COMMAND_LINE) |
| continue; |
| |
| ManifestReloadReason reload_reason = ShouldReloadExtensionManifest(*info); |
| ++reload_reason_counts[reload_reason]; |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ManifestReloadEnumValue", |
| reload_reason, 100); |
| |
| if (reload_reason != NOT_NEEDED) { |
| // Reloading an extension reads files from disk. We do this on the |
| // UI thread because reloads should be very rare, and the complexity |
| // added by delaying the time when the extensions service knows about |
| // all extensions is significant. See crbug.com/37548 for details. |
| // |allow_io| disables tests that file operations run on the file |
| // thread. |
| base::ThreadRestrictions::ScopedAllowIO allow_io; |
| |
| std::string error; |
| scoped_refptr<const Extension> extension( |
| extension_file_util::LoadExtension( |
| info->extension_path, |
| info->extension_location, |
| GetCreationFlags(info), |
| &error)); |
| |
| if (!extension.get()) { |
| extension_service_->ReportExtensionLoadError( |
| info->extension_path, error, false); |
| continue; |
| } |
| |
| extensions_info->at(i)->extension_manifest.reset( |
| static_cast<DictionaryValue*>( |
| extension->manifest()->value()->DeepCopy())); |
| should_write_prefs = true; |
| } |
| } |
| |
| for (size_t i = 0; i < extensions_info->size(); ++i) { |
| if (extensions_info->at(i)->extension_location == Manifest::COMMAND_LINE) |
| continue; |
| Load(*extensions_info->at(i), should_write_prefs); |
| } |
| |
| extension_service_->OnLoadedInstalledExtensions(); |
| |
| // The histograms Extensions.ManifestReload* allow us to validate |
| // the assumption that reloading manifest is a rare event. |
| UMA_HISTOGRAM_COUNTS_100("Extensions.ManifestReloadNotNeeded", |
| reload_reason_counts[NOT_NEEDED]); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.ManifestReloadUnpackedDir", |
| reload_reason_counts[UNPACKED_DIR]); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.ManifestReloadNeedsRelocalization", |
| reload_reason_counts[NEEDS_RELOCALIZATION]); |
| |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadAll", |
| extension_service_->extensions()->size()); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.Disabled", |
| extension_service_->disabled_extensions()->size()); |
| |
| UMA_HISTOGRAM_TIMES("Extensions.LoadAllTime", |
| base::TimeTicks::Now() - start_time); |
| |
| int app_user_count = 0; |
| int app_external_count = 0; |
| int hosted_app_count = 0; |
| int legacy_packaged_app_count = 0; |
| int platform_app_count = 0; |
| int user_script_count = 0; |
| int content_pack_count = 0; |
| int extension_user_count = 0; |
| int extension_external_count = 0; |
| int theme_count = 0; |
| int page_action_count = 0; |
| int browser_action_count = 0; |
| int disabled_for_permissions_count = 0; |
| int item_user_count = 0; |
| int non_webstore_ntp_override_count = 0; |
| const ExtensionSet* extensions = extension_service_->extensions(); |
| ExtensionSet::const_iterator ex; |
| for (ex = extensions->begin(); ex != extensions->end(); ++ex) { |
| Manifest::Location location = (*ex)->location(); |
| Manifest::Type type = (*ex)->GetType(); |
| if ((*ex)->is_app()) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.AppLocation", |
| location, 100); |
| } else if (type == Manifest::TYPE_EXTENSION) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExtensionLocation", |
| location, 100); |
| } |
| if (!ManifestURL::UpdatesFromGallery(*ex)) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.NonWebstoreLocation", |
| location, 100); |
| } |
| if (Manifest::IsExternalLocation(location)) { |
| // See loop below for DISABLED. |
| if (ManifestURL::UpdatesFromGallery(*ex)) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExternalItemState", |
| EXTERNAL_ITEM_WEBSTORE_ENABLED, |
| EXTERNAL_ITEM_MAX_ITEMS); |
| } else { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExternalItemState", |
| EXTERNAL_ITEM_NONWEBSTORE_ENABLED, |
| EXTERNAL_ITEM_MAX_ITEMS); |
| } |
| } |
| if ((*ex)->from_webstore()) { |
| // Check for inconsistencies if the extension was supposedly installed |
| // from the webstore. |
| enum { |
| BAD_UPDATE_URL = 0, |
| // This value was a mistake. Turns out sideloaded extensions can |
| // have the from_webstore bit if they update from the webstore. |
| DEPRECATED_IS_EXTERNAL = 1, |
| }; |
| if (!ManifestURL::UpdatesFromGallery(*ex)) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.FromWebstoreInconsistency", |
| BAD_UPDATE_URL, 2); |
| } |
| } |
| |
| // Don't count component extensions, since they are only extensions as an |
| // implementation detail. |
| if (location == Manifest::COMPONENT) |
| continue; |
| // Histogram for non-webstore extensions overriding new tab page should |
| // include unpacked extensions. |
| if (!(*ex)->from_webstore()) { |
| const extensions::URLOverrides::URLOverrideMap& override_map = |
| extensions::URLOverrides::GetChromeURLOverrides(ex->get()); |
| if (override_map.find("newtab") != override_map.end()) { |
| ++non_webstore_ntp_override_count; |
| } |
| } |
| |
| // Don't count unpacked extensions, since they're a developer-specific |
| // feature. |
| if (Manifest::IsUnpackedLocation(location)) |
| continue; |
| |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ManifestVersion", |
| (*ex)->manifest_version(), 10); |
| |
| if (type == Manifest::TYPE_EXTENSION) { |
| BackgroundPageType background_page_type = |
| GetBackgroundPageType(ex->get()); |
| UMA_HISTOGRAM_ENUMERATION( |
| "Extensions.BackgroundPageType", background_page_type, 10); |
| } |
| |
| // Using an enumeration shows us the total installed ratio across all users. |
| // Using the totals per user at each startup tells us the distribution of |
| // usage for each user (e.g. 40% of users have at least one app installed). |
| UMA_HISTOGRAM_ENUMERATION("Extensions.LoadType", type, 100); |
| switch (type) { |
| case Manifest::TYPE_THEME: |
| ++theme_count; |
| break; |
| case Manifest::TYPE_USER_SCRIPT: |
| ++user_script_count; |
| break; |
| case Manifest::TYPE_HOSTED_APP: |
| ++hosted_app_count; |
| if (Manifest::IsExternalLocation(location)) { |
| ++app_external_count; |
| } else { |
| ++app_user_count; |
| } |
| break; |
| case Manifest::TYPE_LEGACY_PACKAGED_APP: |
| ++legacy_packaged_app_count; |
| if (Manifest::IsExternalLocation(location)) { |
| ++app_external_count; |
| } else { |
| ++app_user_count; |
| } |
| break; |
| case Manifest::TYPE_PLATFORM_APP: |
| ++platform_app_count; |
| if (Manifest::IsExternalLocation(location)) { |
| ++app_external_count; |
| } else { |
| ++app_user_count; |
| } |
| break; |
| case Manifest::TYPE_EXTENSION: |
| default: |
| if (Manifest::IsExternalLocation(location)) { |
| ++extension_external_count; |
| } else { |
| ++extension_user_count; |
| } |
| break; |
| } |
| if (!Manifest::IsExternalLocation((*ex)->location())) |
| ++item_user_count; |
| ExtensionActionManager* extension_action_manager = |
| ExtensionActionManager::Get(extension_service_->profile()); |
| if (extension_action_manager->GetPageAction(*ex->get())) |
| ++page_action_count; |
| if (extension_action_manager->GetBrowserAction(*ex->get())) |
| ++browser_action_count; |
| |
| if (extensions::ManagedModeInfo::IsContentPack(ex->get())) |
| ++content_pack_count; |
| |
| extension_service_->RecordPermissionMessagesHistogram( |
| ex->get(), "Extensions.Permissions_Load"); |
| } |
| |
| const ExtensionSet* disabled_extensions = |
| extension_service_->disabled_extensions(); |
| for (ex = disabled_extensions->begin(); |
| ex != disabled_extensions->end(); ++ex) { |
| if (extension_service_->extension_prefs()-> |
| DidExtensionEscalatePermissions((*ex)->id())) { |
| ++disabled_for_permissions_count; |
| } |
| if (Manifest::IsExternalLocation((*ex)->location())) { |
| // See loop above for ENABLED. |
| if (ManifestURL::UpdatesFromGallery(*ex)) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExternalItemState", |
| EXTERNAL_ITEM_WEBSTORE_DISABLED, |
| EXTERNAL_ITEM_MAX_ITEMS); |
| } else { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExternalItemState", |
| EXTERNAL_ITEM_NONWEBSTORE_DISABLED, |
| EXTERNAL_ITEM_MAX_ITEMS); |
| } |
| } |
| } |
| |
| scoped_ptr<ExtensionPrefs::ExtensionsInfo> uninstalled_extensions_info( |
| extension_prefs_->GetUninstalledExtensionsInfo()); |
| for (size_t i = 0; i < uninstalled_extensions_info->size(); ++i) { |
| ExtensionInfo* info = uninstalled_extensions_info->at(i).get(); |
| if (Manifest::IsExternalLocation(info->extension_location)) { |
| std::string update_url; |
| if (info->extension_manifest->GetString("update_url", &update_url) && |
| extension_urls::IsWebstoreUpdateUrl(GURL(update_url))) { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExternalItemState", |
| EXTERNAL_ITEM_WEBSTORE_UNINSTALLED, |
| EXTERNAL_ITEM_MAX_ITEMS); |
| } else { |
| UMA_HISTOGRAM_ENUMERATION("Extensions.ExternalItemState", |
| EXTERNAL_ITEM_NONWEBSTORE_UNINSTALLED, |
| EXTERNAL_ITEM_MAX_ITEMS); |
| } |
| } |
| } |
| |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadAllUser", item_user_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadApp", |
| app_user_count + app_external_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadAppUser", app_user_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadAppExternal", app_external_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadHostedApp", hosted_app_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadPackagedApp", |
| legacy_packaged_app_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadPlatformApp", platform_app_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadExtension", |
| extension_user_count + extension_external_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadExtensionUser", |
| extension_user_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadExtensionExternal", |
| extension_external_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadUserScript", user_script_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadTheme", theme_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadPageAction", page_action_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadBrowserAction", |
| browser_action_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.LoadContentPack", content_pack_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.DisabledForPermissions", |
| disabled_for_permissions_count); |
| UMA_HISTOGRAM_COUNTS_100("Extensions.NonWebStoreNewTabPageOverrides", |
| non_webstore_ntp_override_count); |
| } |
| |
| int InstalledLoader::GetCreationFlags(const ExtensionInfo* info) { |
| int flags = extension_prefs_->GetCreationFlags(info->extension_id); |
| if (!Manifest::IsUnpackedLocation(info->extension_location)) |
| flags |= Extension::REQUIRE_KEY; |
| if (extension_prefs_->AllowFileAccess(info->extension_id)) |
| flags |= Extension::ALLOW_FILE_ACCESS; |
| return flags; |
| } |
| |
| } // namespace extensions |
