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 CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_NAVIGATION_THROTTLE_H_
6 #define CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_NAVIGATION_THROTTLE_H_
7 
8 #include <memory>
9 
10 #include "base/compiler_specific.h"
11 #include "base/macros.h"
12 #include "base/memory/weak_ptr.h"
13 #include "chrome/browser/supervised_user/supervised_user_error_page/supervised_user_error_page.h"
14 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
15 #include "chrome/browser/supervised_user/supervised_users.h"
16 #include "content/public/browser/navigation_throttle.h"
17 
18 class SupervisedUserNavigationThrottle : public content::NavigationThrottle {
19  public:
20   enum CallbackActions { kCancelNavigation = 0, kCancelWithInterstitial };
21 
22   // Returns a new throttle for the given navigation, or nullptr if no
23   // throttling is required.
24   static std::unique_ptr<SupervisedUserNavigationThrottle>
25   MaybeCreateThrottleFor(content::NavigationHandle* navigation_handle);
26 
27   ~SupervisedUserNavigationThrottle() override;
28 
29   // content::NavigationThrottle implementation:
30   ThrottleCheckResult WillStartRequest() override;
31   ThrottleCheckResult WillRedirectRequest() override;
32   const char* GetNameForLogging() override;
33 
34  private:
35   SupervisedUserNavigationThrottle(
36       content::NavigationHandle* navigation_handle);
37 
38   // Checks the current URL for the navigation. If called from
39   // WillRedirectRequest, checks the URL being redirected to, not the original
40   // URL.
41   ThrottleCheckResult CheckURL();
42 
43   void ShowInterstitial(
44       const GURL& url,
45       supervised_user_error_page::FilteringBehaviorReason reason);
46 
47   void ShowInterstitialAsync(
48       supervised_user_error_page::FilteringBehaviorReason reason);
49 
50   void OnCheckDone(const GURL& url,
51                    SupervisedUserURLFilter::FilteringBehavior behavior,
52                    supervised_user_error_page::FilteringBehaviorReason reason,
53                    bool uncertain);
54 
55   void OnInterstitialResult(CallbackActions continue_request,
56                             bool already_requested_permission,
57                             bool is_main_frame);
58 
59   const SupervisedUserURLFilter* url_filter_;
60   bool deferred_;
61   supervised_user_error_page::FilteringBehaviorReason reason_;
62   SupervisedUserURLFilter::FilteringBehavior behavior_;
63   base::WeakPtrFactory<SupervisedUserNavigationThrottle> weak_ptr_factory_{
64       this};
65 
66   DISALLOW_COPY_AND_ASSIGN(SupervisedUserNavigationThrottle);
67 };
68 
69 #endif  // CHROME_BROWSER_SUPERVISED_USER_SUPERVISED_USER_NAVIGATION_THROTTLE_H_
70