Supervised user blacklist: Add downloader class to download a blacklist if needed.

chrome/browser/supervised_user/supervised_user_service.h

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_SERVICE_H_
 #define CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 17 matching lines @@
 
 #if defined(ENABLE_EXTENSIONS)
 #include "extensions/browser/extension_registry_observer.h"
 #include "extensions/browser/management_policy.h"
 #endif
 
 class Browser;
 class GoogleServiceAuthError;
 class PermissionRequestCreator;
 class Profile;
+class SupervisedUserBlacklistDownloader;
 class SupervisedUserRegistrationUtility;
 class SupervisedUserServiceObserver;
 class SupervisedUserSettingsService;
 class SupervisedUserSiteList;
 class SupervisedUserURLFilter;
 
 namespace base {
 class FilePath;
 }
 
@@ skipping 29 matching lines @@
 
   class Delegate {
    public:
     virtual ~Delegate() {}
     // Returns true to indicate that the delegate handled the (de)activation, or
     // false to indicate that the SupervisedUserService itself should handle it.
     virtual bool SetActive(bool active) = 0;
     // Returns the path to a blacklist file to load, or an empty path to
     // indicate "none".
     virtual base::FilePath GetBlacklistPath() const = 0;
+    // Returns the URL from which to download a blacklist if no local one exists
+    // yet. The blacklist file will be stored at |GetBlacklistPath()|.
+    virtual GURL GetBlacklistURL() const = 0;
   };
 
   virtual ~SupervisedUserService();
 
   // ProfileKeyedService override:
   virtual void Shutdown() OVERRIDE;
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   void SetDelegate(Delegate* delegate);
@@ skipping 177 matching lines @@
 #endif
 
   SupervisedUserSettingsService* GetSettingsService();
 
   void OnSupervisedUserIdChanged();
 
   void OnDefaultFilteringBehaviorChanged();
 
   void UpdateSiteLists();
 
+  // Asynchronously downloads a static blacklist file from |url|, stores it at
+  // |path|, loads it, and applies it to the URL filters. If |url| is not valid
+  // (e.g. empty), directly tries to load from |path|.
+  void LoadBlacklist(const base::FilePath& path, const GURL& url);
+
   // Asynchronously loads a static blacklist from a binary file at |path| and
   // applies it to the URL filters.
-  void LoadBlacklist(const base::FilePath& path);
+  void LoadBlacklistFromFile(const base::FilePath& path);
+
+  void OnBlacklistDownloadDone(const base::FilePath& path, bool success);
 
   // Updates the manual overrides for hosts in the URL filters when the
   // corresponding preference is changed.
   void UpdateManualHosts();
 
   // Updates the manual overrides for URLs in the URL filters when the
   // corresponding preference is changed.
   void UpdateManualURLs();
 
   // Returns the human readable name of the supervised user.
@@ skipping 23 matching lines @@
   // Sets a profile in elevated state for testing if set to true.
   bool elevated_for_testing_;
 
   // True only when |Init()| method has been called.
   bool did_init_;
 
   // True only when |Shutdown()| method has been called.
   bool did_shutdown_;
 
   URLFilterContext url_filter_context_;
+  scoped_ptr<SupervisedUserBlacklistDownloader> blacklist_downloader_;
 
   // Used to create permission requests.
   scoped_ptr<PermissionRequestCreator> permissions_creator_;
 
   ObserverList<SupervisedUserServiceObserver> observer_list_;
 
   base::WeakPtrFactory<SupervisedUserService> weak_ptr_factory_;
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_SERVICE_H_