chrome/browser/extensions/api/identity/web_auth_flow.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_EXTENSIONS_API_IDENTITY_WEB_AUTH_FLOW_H_
   6 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_WEB_AUTH_FLOW_H_
   7
   8 #include <string>
   9
  10 #include "apps/app_window_registry.h"
  11 #include "content/public/browser/notification_observer.h"
  12 #include "content/public/browser/notification_registrar.h"
  13 #include "content/public/browser/web_contents_observer.h"
  14 #include "ui/gfx/rect.h"
  15 #include "url/gurl.h"
  16
  17 class Profile;
  18 class WebAuthFlowTest;
  19
  20 namespace content {
  21 class NotificationDetails;
  22 class NotificationSource;
  23 class RenderViewHost;
  24 class WebContents;
  25 }
  26
  27 namespace extensions {
  28
  29 // Controller class for web based auth flows. The WebAuthFlow creates
  30 // a dialog window in the scope approval component app by firing an
  31 // event. A webview embedded in the dialog will navigate to the
  32 // |provider_url| passed to the WebAuthFlow constructor.
  33 //
  34 // The WebAuthFlow monitors the WebContents of the webview, and
  35 // notifies its delegate interface any time the WebContents navigates
  36 // to a new URL or changes title. The delegate is expected to delete
  37 // the flow when navigation reaches a known target location.
  38 //
  39 // The window is not displayed until the first page load
  40 // completes. This allows the flow to complete without flashing a
  41 // window on screen if the provider immediately redirects to the
  42 // target URL.
  43 //
  44 // A WebAuthFlow can be started in Mode::SILENT, which never displays
  45 // a window. If a window would be required, the flow fails.
  46 class WebAuthFlow : public content::NotificationObserver,
  47                     public content::WebContentsObserver,
  48                     public apps::AppWindowRegistry::Observer {
  49  public:
  50   enum Mode {
  51     INTERACTIVE,  // Show UI to the user if necessary.
  52     SILENT        // No UI should be shown.
  53   };
  54
  55   enum Failure {
  56     WINDOW_CLOSED,  // Window closed by user.
  57     INTERACTION_REQUIRED,  // Non-redirect page load in silent mode.
  58     LOAD_FAILED
  59   };
  60
  61   class Delegate {
  62    public:
  63     // Called when the auth flow fails. This means that the flow did not result
  64     // in a successful redirect to a valid redirect URL.
  65     virtual void OnAuthFlowFailure(Failure failure) = 0;
  66     // Called on redirects and other navigations to see if the URL should stop
  67     // the flow.
  68     virtual void OnAuthFlowURLChange(const GURL& redirect_url) = 0;
  69     // Called when the title of the current page changes.
  70     virtual void OnAuthFlowTitleChange(const std::string& title) = 0;
  71
  72    protected:
  73     virtual ~Delegate() {}
  74   };
  75
  76   // Creates an instance with the given parameters.
  77   // Caller owns |delegate|.
  78   WebAuthFlow(Delegate* delegate,
  79               Profile* profile,
  80               const GURL& provider_url,
  81               Mode mode);
  82
  83   virtual ~WebAuthFlow();
  84
  85   // Starts the flow.
  86   virtual void Start();
  87
  88   // Prevents further calls to the delegate and deletes the flow.
  89   void DetachDelegateAndDelete();
  90
  91  private:
  92   friend class ::WebAuthFlowTest;
  93
  94   // ::AppWindowRegistry::Observer implementation.
  95   virtual void OnAppWindowAdded(apps::AppWindow* app_window) OVERRIDE;
  96   virtual void OnAppWindowRemoved(apps::AppWindow* app_window) OVERRIDE;
  97
  98   // NotificationObserver implementation.
  99   virtual void Observe(int type,
 100                        const content::NotificationSource& source,
 101                        const content::NotificationDetails& details) OVERRIDE;
 102
 103   // WebContentsObserver implementation.
 104   virtual void DidStopLoading(content::RenderViewHost* render_view_host)
 105       OVERRIDE;
 106   virtual void DidNavigateMainFrame(
 107       const content::LoadCommittedDetails& details,
 108       const content::FrameNavigateParams& params) OVERRIDE;
 109   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
 110   virtual void DidStartProvisionalLoadForFrame(
 111       content::RenderFrameHost* render_frame_host,
 112       const GURL& validated_url,
 113       bool is_error_page,
 114       bool is_iframe_srcdoc) OVERRIDE;
 115   virtual void DidFailProvisionalLoad(
 116       content::RenderFrameHost* render_frame_host,
 117       const GURL& validated_url,
 118       int error_code,
 119       const base::string16& error_description) OVERRIDE;
 120
 121   void BeforeUrlLoaded(const GURL& url);
 122   void AfterUrlLoaded();
 123
 124   Delegate* delegate_;
 125   Profile* profile_;
 126   GURL provider_url_;
 127   Mode mode_;
 128
 129   apps::AppWindow* app_window_;
 130   std::string app_window_key_;
 131   bool embedded_window_created_;
 132
 133   content::NotificationRegistrar registrar_;
 134
 135   DISALLOW_COPY_AND_ASSIGN(WebAuthFlow);
 136 };
 137
 138 }  // namespace extensions
 139
 140 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_WEB_AUTH_FLOW_H_