components/component_updater/update_checker.h

   1 // Copyright 2014 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.
   4
   5 #ifndef COMPONENTS_COMPONENT_UPDATER_UPDATE_CHECKER_H_
   6 #define COMPONENTS_COMPONENT_UPDATER_UPDATE_CHECKER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/callback.h"
  12 #include "base/macros.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "components/component_updater/update_response.h"
  15 #include "url/gurl.h"
  16
  17 class GURL;
  18
  19 namespace net {
  20 class URLRequestContextGetter;
  21 }
  22
  23 namespace component_updater {
  24
  25 class Configurator;
  26 struct CrxUpdateItem;
  27
  28 class UpdateChecker {
  29  public:
  30   typedef base::Callback<void(const GURL& original_url,
  31                               int error,
  32                               const std::string& error_message,
  33                               const UpdateResponse::Results& results)>
  34       UpdateCheckCallback;
  35
  36   virtual ~UpdateChecker() {}
  37
  38   // Initiates an update check for the |items_to_check|. |additional_attributes|
  39   // provides a way to customize the <request> element. This value is inserted
  40   // as-is, therefore it must be well-formed as an XML attribute string.
  41   virtual bool CheckForUpdates(
  42       const std::vector<CrxUpdateItem*>& items_to_check,
  43       const std::string& additional_attributes,
  44       const UpdateCheckCallback& update_check_callback) = 0;
  45
  46   static scoped_ptr<UpdateChecker> Create(const Configurator& config);
  47
  48  protected:
  49   UpdateChecker() {}
  50
  51  private:
  52   DISALLOW_COPY_AND_ASSIGN(UpdateChecker);
  53 };
  54
  55 }  // namespace component_updater
  56
  57 #endif  // COMPONENTS_COMPONENT_UPDATER_UPDATE_CHECKER_H_