1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
6 #define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
14 #include "base/callback_forward.h"
15 #include "base/compiler_specific.h"
16 #include "base/files/file_path.h"
17 #include "base/gtest_prod_util.h"
18 #include "base/memory/scoped_ptr.h"
19 #include "base/memory/weak_ptr.h"
20 #include "base/scoped_observer.h"
21 #include "base/time/time.h"
22 #include "base/timer/timer.h"
23 #include "chrome/browser/extensions/updater/extension_downloader.h"
24 #include "chrome/browser/extensions/updater/extension_downloader_delegate.h"
25 #include "chrome/browser/extensions/updater/manifest_fetch_data.h"
26 #include "content/public/browser/notification_observer.h"
27 #include "content/public/browser/notification_registrar.h"
28 #include "extensions/browser/extension_registry_observer.h"
31 class ExtensionServiceInterface;
39 namespace extensions {
43 class ExtensionRegistry;
45 class ExtensionUpdaterTest;
47 // A class for doing auto-updates of installed Extensions. Used like this:
49 // ExtensionUpdater* updater = new ExtensionUpdater(my_extensions_service,
53 // update_frequency_secs,
54 // downloader_factory);
58 class ExtensionUpdater : public ExtensionDownloaderDelegate,
59 public ExtensionRegistryObserver,
60 public content::NotificationObserver {
62 typedef base::Closure FinishedCallback;
65 // Creates a default CheckParams instance that checks for all extensions.
69 // The set of extensions that should be checked for updates. If empty
70 // all extensions will be included in the update check.
71 std::list<std::string> ids;
73 // Normally extension updates get installed only when the extension is idle.
74 // Setting this to true causes any updates that are found to be installed
76 bool install_immediately;
78 // Callback to call when the update check is complete. Can be null, if
79 // you're not interested in when this happens.
80 FinishedCallback callback;
83 // Holds a pointer to the passed |service|, using it for querying installed
84 // extensions and installing updated ones. The |frequency_seconds| parameter
85 // controls how often update checks are scheduled.
86 ExtensionUpdater(ExtensionServiceInterface* service,
87 ExtensionPrefs* extension_prefs,
90 int frequency_seconds,
91 ExtensionCache* cache,
92 const ExtensionDownloader::Factory& downloader_factory);
94 virtual ~ExtensionUpdater();
96 // Starts the updater running. Should be called at most once.
99 // Stops the updater running, cancelling any outstanding update manifest and
100 // crx downloads. Does not cancel any in-progress installs.
103 // Posts a task to do an update check. Does nothing if there is
104 // already a pending task that has not yet run.
107 // Starts an update check for the specified extension soon. If a check
108 // is already running, or finished too recently without an update being
109 // installed, this method returns false and the check won't be scheduled.
110 bool CheckExtensionSoon(const std::string& extension_id,
111 const FinishedCallback& callback);
113 // Starts an update check right now, instead of waiting for the next
114 // regularly scheduled check or a pending check from CheckSoon().
115 void CheckNow(const CheckParams& params);
117 // Returns true iff CheckSoon() has been called but the update check
118 // hasn't been performed yet. This is used mostly by tests; calling
119 // code should just call CheckSoon().
120 bool WillCheckSoon() const;
122 // Changes the params that are used for the automatic periodic update checks,
123 // as well as for explicit calls to CheckSoon.
124 void set_default_check_params(const CheckParams& params) {
125 default_params_ = params;
129 friend class ExtensionUpdaterTest;
130 friend class ExtensionUpdaterFileHandler;
132 // FetchedCRXFile holds information about a CRX file we fetched to disk,
133 // but have not yet installed.
134 struct FetchedCRXFile {
136 FetchedCRXFile(const std::string& id,
137 const base::FilePath& path,
138 bool file_ownership_passed,
139 const std::set<int>& request_ids);
142 std::string extension_id;
144 bool file_ownership_passed;
145 std::set<int> request_ids;
148 struct InProgressCheck {
152 bool install_immediately;
153 FinishedCallback callback;
154 // The ids of extensions that have in-progress update checks.
155 std::list<std::string> in_progress_ids_;
160 // Callback used to continue CheckNow after determining which extensions
161 // should be force-updated.
162 void OnForcedUpdatesDetermined(const CheckParams& params,
163 const std::set<std::string>& forced_updates);
165 // Ensure that we have a valid ExtensionDownloader instance referenced by
167 void EnsureDownloaderCreated();
169 // Computes when to schedule the first update check.
170 base::TimeDelta DetermineFirstCheckDelay();
172 // Sets the timer to call TimerFired after roughly |target_delay| from now.
173 // To help spread load evenly on servers, this method adds some random
174 // jitter. It also saves the scheduled time so it can be reloaded on
176 void ScheduleNextCheck(const base::TimeDelta& target_delay);
178 // Add fetch records for extensions that are installed to the downloader,
179 // ignoring |pending_ids| so the extension isn't fetched again.
180 void AddToDownloader(const ExtensionSet* extensions,
181 const std::list<std::string>& pending_ids,
184 // BaseTimer::ReceiverMethod callback.
187 // Posted by CheckSoon().
190 // Implementation of ExtensionDownloaderDelegate.
191 virtual void OnExtensionDownloadFailed(
192 const std::string& id,
194 const PingResult& ping,
195 const std::set<int>& request_ids) OVERRIDE;
196 virtual void OnExtensionDownloadFinished(
197 const std::string& id,
198 const base::FilePath& path,
199 bool file_ownership_passed,
200 const GURL& download_url,
201 const std::string& version,
202 const PingResult& ping,
203 const std::set<int>& request_id) OVERRIDE;
204 virtual bool GetPingDataForExtension(
205 const std::string& id,
206 ManifestFetchData::PingData* ping_data) OVERRIDE;
207 virtual std::string GetUpdateUrlData(const std::string& id) OVERRIDE;
208 virtual bool IsExtensionPending(const std::string& id) OVERRIDE;
209 virtual bool GetExtensionExistingVersion(const std::string& id,
210 std::string* version) OVERRIDE;
211 virtual bool ShouldForceUpdate(const std::string& extension_id,
212 std::string* source) OVERRIDE;
214 void UpdatePingData(const std::string& id, const PingResult& ping_result);
216 // Starts installing a crx file that has been fetched but not installed yet.
217 void MaybeInstallCRXFile();
219 // content::NotificationObserver implementation.
220 virtual void Observe(int type,
221 const content::NotificationSource& source,
222 const content::NotificationDetails& details) OVERRIDE;
224 // Implementation of ExtensionRegistryObserver.
225 virtual void OnExtensionWillBeInstalled(
226 content::BrowserContext* browser_context,
227 const Extension* extension,
230 const std::string& old_name) OVERRIDE;
232 // Send a notification that update checks are starting.
233 void NotifyStarted();
235 // Send a notification if we're finished updating.
236 void NotifyIfFinished(int request_id);
238 void ExtensionCheckFinished(const std::string& extension_id,
239 const FinishedCallback& callback);
241 // Whether Start() has been called but not Stop().
244 base::WeakPtrFactory<ExtensionUpdater> weak_ptr_factory_;
246 // Pointer back to the service that owns this ExtensionUpdater.
247 ExtensionServiceInterface* service_;
249 // A closure passed into the ExtensionUpdater to teach it how to construct
250 // new ExtensionDownloader instances.
251 const ExtensionDownloader::Factory downloader_factory_;
253 // Fetches the crx files for the extensions that have an available update.
254 scoped_ptr<ExtensionDownloader> downloader_;
256 base::OneShotTimer<ExtensionUpdater> timer_;
257 int frequency_seconds_;
258 bool will_check_soon_;
260 ExtensionPrefs* extension_prefs_;
264 std::map<int, InProgressCheck> requests_in_progress_;
265 int next_request_id_;
267 // Observes CRX installs we initiate.
268 content::NotificationRegistrar registrar_;
270 ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
271 extension_registry_observer_;
273 // True when a CrxInstaller is doing an install. Used in MaybeUpdateCrxFile()
274 // to keep more than one install from running at once.
275 bool crx_install_is_running_;
277 // Fetched CRX files waiting to be installed.
278 std::stack<FetchedCRXFile> fetched_crx_files_;
279 FetchedCRXFile current_crx_file_;
281 CheckParams default_params_;
283 ExtensionCache* extension_cache_;
285 // Keeps track of when an extension tried to update itself, so we can throttle
286 // checks to prevent too many requests from being made.
287 std::map<std::string, ThrottleInfo> throttle_info_;
289 // Keeps track of extensions (by ID) whose update should be forced during the
290 // next update check.
291 std::set<std::string> forced_updates_;
293 DISALLOW_COPY_AND_ASSIGN(ExtensionUpdater);
296 } // namespace extensions
298 #endif // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_