chrome/browser/captive_portal/captive_portal_tab_helper.h

   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.
   4
   5 #ifndef CHROME_BROWSER_CAPTIVE_PORTAL_CAPTIVE_PORTAL_TAB_HELPER_H_
   6 #define CHROME_BROWSER_CAPTIVE_PORTAL_CAPTIVE_PORTAL_TAB_HELPER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/threading/non_thread_safe.h"
  12 #include "chrome/browser/captive_portal/captive_portal_service.h"
  13 #include "content/public/browser/notification_observer.h"
  14 #include "content/public/browser/notification_registrar.h"
  15 #include "content/public/browser/web_contents_observer.h"
  16 #include "content/public/browser/web_contents_user_data.h"
  17 #include "content/public/common/resource_type.h"
  18
  19 class GURL;
  20 class Profile;
  21
  22 namespace content {
  23   class WebContents;
  24 }
  25
  26 namespace net {
  27 class SSLInfo;
  28 }
  29
  30 class CaptivePortalLoginDetector;
  31 class CaptivePortalTabReloader;
  32
  33 // Along with the classes it owns, responsible for detecting page loads broken
  34 // by a captive portal, triggering captive portal checks on navigation events
  35 // that may indicate a captive portal is present, or has been removed / logged
  36 // in to, and taking any correcting actions.
  37 //
  38 // It acts as a WebContentsObserver for its CaptivePortalLoginDetector and
  39 // CaptivePortalTabReloader.  It filters out non-main-frame resource loads, and
  40 // treats the commit of an error page as a single event, rather than as 3
  41 // (ProvisionalLoadFail, DidStartProvisionalLoad, DidCommit), which simplifies
  42 // the CaptivePortalTabReloader.  It is also needed by CaptivePortalTabReloaders
  43 // to inform the tab's CaptivePortalLoginDetector when the tab is at a captive
  44 // portal's login page.
  45 //
  46 // The TabHelper assumes that a WebContents can only have one RenderViewHost
  47 // with a provisional load at a time, and tracks only that navigation.  This
  48 // assumption can be violated in rare cases, for example, a same-site
  49 // navigation interrupted by a cross-process navigation started from the
  50 // omnibox, may commit before it can be cancelled.  In these cases, this class
  51 // may pass incorrect messages to the TabReloader, which will, at worst, result
  52 // in not opening up a login tab until a second load fails or not automatically
  53 // reloading a tab after logging in.
  54 //
  55 // For the design doc, see:
  56 // https://docs.google.com/document/d/1k-gP2sswzYNvryu9NcgN7q5XrsMlUdlUdoW9WRaEmfM/edit
  57 class CaptivePortalTabHelper
  58     : public content::WebContentsObserver,
  59       public content::NotificationObserver,
  60       public base::NonThreadSafe,
  61       public content::WebContentsUserData<CaptivePortalTabHelper> {
  62  public:
  63   virtual ~CaptivePortalTabHelper();
  64
  65   // content::WebContentsObserver:
  66   virtual void RenderViewDeleted(
  67       content::RenderViewHost* render_view_host) OVERRIDE;
  68
  69   virtual void DidStartProvisionalLoadForFrame(
  70       content::RenderFrameHost* render_frame_host,
  71       const GURL& validated_url,
  72       bool is_error_page,
  73       bool is_iframe_srcdoc) OVERRIDE;
  74
  75   virtual void DidCommitProvisionalLoadForFrame(
  76       content::RenderFrameHost* render_frame_host,
  77       const GURL& url,
  78       content::PageTransition transition_type) OVERRIDE;
  79
  80   virtual void DidFailProvisionalLoad(
  81       content::RenderFrameHost* render_frame_host,
  82       const GURL& validated_url,
  83       int error_code,
  84       const base::string16& error_description) OVERRIDE;
  85
  86   virtual void DidStopLoading(
  87       content::RenderViewHost* render_view_host) OVERRIDE;
  88
  89   // content::NotificationObserver:
  90   virtual void Observe(
  91       int type,
  92       const content::NotificationSource& source,
  93       const content::NotificationDetails& details) OVERRIDE;
  94
  95   // Called when a certificate interstitial error page is about to be shown.
  96   void OnSSLCertError(const net::SSLInfo& ssl_info);
  97
  98   // A "Login Tab" is a tab that was originally at a captive portal login
  99   // page.  This is set to false when a captive portal is no longer detected.
 100   bool IsLoginTab() const;
 101
 102  private:
 103   friend class CaptivePortalBrowserTest;
 104   friend class CaptivePortalTabHelperTest;
 105
 106   friend class content::WebContentsUserData<CaptivePortalTabHelper>;
 107   explicit CaptivePortalTabHelper(content::WebContents* web_contents);
 108
 109   // Called by Observe in response to the corresponding event.
 110   void OnRedirect(int child_id,
 111                   content::ResourceType resource_type,
 112                   const GURL& new_url);
 113
 114   // Called by Observe in response to the corresponding event.
 115   void OnCaptivePortalResults(
 116       captive_portal::CaptivePortalResult previous_result,
 117       captive_portal::CaptivePortalResult result);
 118
 119   void OnLoadAborted();
 120
 121   // Called to indicate a tab is at, or is navigating to, the captive portal
 122   // login page.
 123   void SetIsLoginTab();
 124
 125   // |this| takes ownership of |tab_reloader|.
 126   void SetTabReloaderForTest(CaptivePortalTabReloader* tab_reloader);
 127
 128   const content::RenderViewHost* provisional_render_view_host() const {
 129     return provisional_render_view_host_;
 130   }
 131
 132   CaptivePortalTabReloader* GetTabReloaderForTest();
 133
 134   // Opens a login tab if the profile's active window doesn't have one already.
 135   void OpenLoginTab();
 136
 137   Profile* profile_;
 138
 139   // Neither of these will ever be NULL.
 140   scoped_ptr<CaptivePortalTabReloader> tab_reloader_;
 141   scoped_ptr<CaptivePortalLoginDetector> login_detector_;
 142
 143   content::WebContents* web_contents_;
 144
 145   // If a provisional load has failed, and the tab is loading an error page, the
 146   // error code associated with the error page we're loading.
 147   // net::OK, otherwise.
 148   int pending_error_code_;
 149
 150   // The RenderViewHost with a provisional load, if any.  Can either be
 151   // the currently displayed RenderViewHost or a pending RenderViewHost for
 152   // cross-process navitations.  NULL when there's currently no provisional
 153   // load.
 154   content::RenderViewHost* provisional_render_view_host_;
 155
 156   content::NotificationRegistrar registrar_;
 157
 158   DISALLOW_COPY_AND_ASSIGN(CaptivePortalTabHelper);
 159 };
 160
 161 #endif  // CHROME_BROWSER_CAPTIVE_PORTAL_CAPTIVE_PORTAL_TAB_HELPER_H_