src/chrome/browser/extensions/api/identity/web_auth_flow.cc

   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 #include "chrome/browser/extensions/api/identity/web_auth_flow.h"
   6
   7 #include "apps/app_window.h"
   8 #include "base/base64.h"
   9 #include "base/debug/trace_event.h"
  10 #include "base/location.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "chrome/browser/extensions/component_loader.h"
  15 #include "chrome/browser/extensions/extension_service.h"
  16 #include "chrome/browser/profiles/profile.h"
  17 #include "chrome/common/extensions/api/identity_private.h"
  18 #include "chrome/common/extensions/extension_constants.h"
  19 #include "content/public/browser/navigation_details.h"
  20 #include "content/public/browser/navigation_entry.h"
  21 #include "content/public/browser/notification_details.h"
  22 #include "content/public/browser/notification_service.h"
  23 #include "content/public/browser/notification_source.h"
  24 #include "content/public/browser/notification_types.h"
  25 #include "content/public/browser/render_frame_host.h"
  26 #include "content/public/browser/resource_request_details.h"
  27 #include "content/public/browser/web_contents.h"
  28 #include "crypto/random.h"
  29 #include "extensions/browser/event_router.h"
  30 #include "extensions/browser/extension_system.h"
  31 #include "extensions/browser/guest_view/guest_view_base.h"
  32 #include "grit/browser_resources.h"
  33 #include "url/gurl.h"
  34
  35 using apps::AppWindow;
  36 using content::RenderViewHost;
  37 using content::ResourceRedirectDetails;
  38 using content::WebContents;
  39 using content::WebContentsObserver;
  40
  41 namespace extensions {
  42
  43 namespace identity_private = api::identity_private;
  44
  45 WebAuthFlow::WebAuthFlow(
  46     Delegate* delegate,
  47     Profile* profile,
  48     const GURL& provider_url,
  49     Mode mode)
  50     : delegate_(delegate),
  51       profile_(profile),
  52       provider_url_(provider_url),
  53       mode_(mode),
  54       embedded_window_created_(false) {
  55 }
  56
  57 WebAuthFlow::~WebAuthFlow() {
  58   DCHECK(delegate_ == NULL);
  59
  60   // Stop listening to notifications first since some of the code
  61   // below may generate notifications.
  62   registrar_.RemoveAll();
  63   WebContentsObserver::Observe(NULL);
  64
  65   if (!app_window_key_.empty()) {
  66     apps::AppWindowRegistry::Get(profile_)->RemoveObserver(this);
  67
  68     if (app_window_ && app_window_->web_contents())
  69       app_window_->web_contents()->Close();
  70   }
  71 }
  72
  73 void WebAuthFlow::Start() {
  74   apps::AppWindowRegistry::Get(profile_)->AddObserver(this);
  75
  76   // Attach a random ID string to the window so we can recoginize it
  77   // in OnAppWindowAdded.
  78   std::string random_bytes;
  79   crypto::RandBytes(WriteInto(&random_bytes, 33), 32);
  80   base::Base64Encode(random_bytes, &app_window_key_);
  81
  82   // identityPrivate.onWebFlowRequest(app_window_key, provider_url_, mode_)
  83   scoped_ptr<base::ListValue> args(new base::ListValue());
  84   args->AppendString(app_window_key_);
  85   args->AppendString(provider_url_.spec());
  86   if (mode_ == WebAuthFlow::INTERACTIVE)
  87     args->AppendString("interactive");
  88   else
  89     args->AppendString("silent");
  90
  91   scoped_ptr<Event> event(
  92       new Event(identity_private::OnWebFlowRequest::kEventName, args.Pass()));
  93   event->restrict_to_browser_context = profile_;
  94   ExtensionSystem* system = ExtensionSystem::Get(profile_);
  95
  96   extensions::ComponentLoader* component_loader =
  97       system->extension_service()->component_loader();
  98   if (!component_loader->Exists(extension_misc::kIdentityApiUiAppId)) {
  99     component_loader->Add(
 100         IDR_IDENTITY_API_SCOPE_APPROVAL_MANIFEST,
 101         base::FilePath(FILE_PATH_LITERAL("identity_scope_approval_dialog")));
 102   }
 103
 104   system->event_router()->DispatchEventWithLazyListener(
 105       extension_misc::kIdentityApiUiAppId, event.Pass());
 106 }
 107
 108 void WebAuthFlow::DetachDelegateAndDelete() {
 109   delegate_ = NULL;
 110   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 111 }
 112
 113 void WebAuthFlow::OnAppWindowAdded(AppWindow* app_window) {
 114   if (app_window->window_key() == app_window_key_ &&
 115       app_window->extension_id() == extension_misc::kIdentityApiUiAppId) {
 116     app_window_ = app_window;
 117     WebContentsObserver::Observe(app_window->web_contents());
 118
 119     registrar_.Add(
 120         this,
 121         content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
 122         content::NotificationService::AllBrowserContextsAndSources());
 123   }
 124 }
 125
 126 void WebAuthFlow::OnAppWindowRemoved(AppWindow* app_window) {
 127   if (app_window->window_key() == app_window_key_ &&
 128       app_window->extension_id() == extension_misc::kIdentityApiUiAppId) {
 129     app_window_ = NULL;
 130     registrar_.RemoveAll();
 131
 132     if (delegate_)
 133       delegate_->OnAuthFlowFailure(WebAuthFlow::WINDOW_CLOSED);
 134   }
 135 }
 136
 137 void WebAuthFlow::BeforeUrlLoaded(const GURL& url) {
 138   if (delegate_ && embedded_window_created_)
 139     delegate_->OnAuthFlowURLChange(url);
 140 }
 141
 142 void WebAuthFlow::AfterUrlLoaded() {
 143   if (delegate_ && embedded_window_created_ && mode_ == WebAuthFlow::SILENT)
 144     delegate_->OnAuthFlowFailure(WebAuthFlow::INTERACTION_REQUIRED);
 145 }
 146
 147 void WebAuthFlow::Observe(int type,
 148                           const content::NotificationSource& source,
 149                           const content::NotificationDetails& details) {
 150   DCHECK(app_window_);
 151
 152   if (!delegate_)
 153     return;
 154
 155   if (!embedded_window_created_) {
 156     DCHECK(type == content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED);
 157
 158     RenderViewHost* render_view(
 159         content::Details<RenderViewHost>(details).ptr());
 160     WebContents* web_contents = WebContents::FromRenderViewHost(render_view);
 161     GuestViewBase* guest = GuestViewBase::FromWebContents(web_contents);
 162     WebContents* embedder = guest ? guest->embedder_web_contents() : NULL;
 163     if (web_contents &&
 164         (embedder == WebContentsObserver::web_contents())) {
 165       // Switch from watching the app window to the guest inside it.
 166       embedded_window_created_ = true;
 167       WebContentsObserver::Observe(web_contents);
 168
 169       registrar_.RemoveAll();
 170       registrar_.Add(this,
 171                      content::NOTIFICATION_RESOURCE_RECEIVED_REDIRECT,
 172                      content::Source<WebContents>(web_contents));
 173       registrar_.Add(this,
 174                      content::NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
 175                      content::Source<WebContents>(web_contents));
 176     }
 177   } else {
 178     // embedded_window_created_
 179     switch (type) {
 180       case content::NOTIFICATION_RESOURCE_RECEIVED_REDIRECT: {
 181         ResourceRedirectDetails* redirect_details =
 182             content::Details<ResourceRedirectDetails>(details).ptr();
 183         if (redirect_details != NULL)
 184           BeforeUrlLoaded(redirect_details->new_url);
 185         break;
 186       }
 187       case content::NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED: {
 188         std::pair<content::NavigationEntry*, bool>* title =
 189             content::Details<std::pair<content::NavigationEntry*, bool> >(
 190                 details).ptr();
 191
 192         if (title->first) {
 193           delegate_->OnAuthFlowTitleChange(
 194               base::UTF16ToUTF8(title->first->GetTitle()));
 195         }
 196         break;
 197       }
 198       default:
 199         NOTREACHED()
 200             << "Got a notification that we did not register for: " << type;
 201         break;
 202     }
 203   }
 204 }
 205
 206 void WebAuthFlow::RenderProcessGone(base::TerminationStatus status) {
 207   if (delegate_)
 208     delegate_->OnAuthFlowFailure(WebAuthFlow::WINDOW_CLOSED);
 209 }
 210
 211 void WebAuthFlow::DidStartProvisionalLoadForFrame(
 212     content::RenderFrameHost* render_frame_host,
 213     const GURL& validated_url,
 214     bool is_error_page,
 215     bool is_iframe_srcdoc) {
 216   if (!render_frame_host->GetParent())
 217     BeforeUrlLoaded(validated_url);
 218 }
 219
 220 void WebAuthFlow::DidFailProvisionalLoad(
 221     content::RenderFrameHost* render_frame_host,
 222     const GURL& validated_url,
 223     int error_code,
 224     const base::string16& error_description) {
 225   TRACE_EVENT_ASYNC_STEP_PAST1("identity",
 226                                "WebAuthFlow",
 227                                this,
 228                                "DidFailProvisionalLoad",
 229                                "error_code",
 230                                error_code);
 231   if (delegate_)
 232     delegate_->OnAuthFlowFailure(LOAD_FAILED);
 233 }
 234
 235 void WebAuthFlow::DidStopLoading(RenderViewHost* render_view_host) {
 236   AfterUrlLoaded();
 237 }
 238
 239 void WebAuthFlow::DidNavigateMainFrame(
 240     const content::LoadCommittedDetails& details,
 241     const content::FrameNavigateParams& params) {
 242   if (delegate_ && details.http_status_code >= 400)
 243     delegate_->OnAuthFlowFailure(LOAD_FAILED);
 244 }
 245
 246 }  // namespace extensions