Support manual (white|black)list, previewing and allowing after interstitial

chrome/browser/managed_mode/managed_mode_navigation_observer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/managed_mode/managed_mode_navigation_observer.h"
 
+#include "base/bind.h"
+#include "base/i18n/rtl.h"
+#include "base/string_number_conversions.h"
 #include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
 #include "chrome/browser/api/infobars/infobar_service.h"
+#include "chrome/browser/api/infobars/simple_alert_infobar_delegate.h"
 #include "chrome/browser/managed_mode/managed_mode.h"
+#include "chrome/browser/managed_mode/managed_mode_interstitial.h"
+#include "chrome/browser/managed_mode/managed_mode_resource_throttle.h"
 #include "chrome/browser/managed_mode/managed_mode_url_filter.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_list.h"
+#include "chrome/common/jstemplate_builder.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "grit/generated_resources.h"
+#include "grit/locale_settings.h"
 #include "ui/base/l10n/l10n_util.h"
 
+using content::BrowserThread;
+
 namespace {
 
 class ManagedModeWarningInfobarDelegate : public ConfirmInfoBarDelegate {
  public:
-  explicit ManagedModeWarningInfobarDelegate(InfoBarService* infobar_service);
+  explicit ManagedModeWarningInfobarDelegate(
+      InfoBarService* infobar_service,
+      int last_allowed_page);
 
  private:
   virtual ~ManagedModeWarningInfobarDelegate();
 
   // ConfirmInfoBarDelegate overrides:
   virtual string16 GetMessageText() const OVERRIDE;
   virtual int GetButtons() const OVERRIDE;
   virtual string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
   virtual bool Accept() OVERRIDE;
   virtual bool Cancel() OVERRIDE;
 
   // InfoBarDelegate override:
   virtual bool ShouldExpire(
       const content::LoadCommittedDetails& details) const OVERRIDE;
   virtual void InfoBarDismissed() OVERRIDE;
 
+  int last_allowed_page_;
+
   DISALLOW_COPY_AND_ASSIGN(ManagedModeWarningInfobarDelegate);
 };
 
 void GoBackToSafety(content::WebContents* web_contents) {
   // For now, just go back one page (the user didn't retreat from that page,
   // so it should be okay).
   content::NavigationController* controller =
       &web_contents->GetController();
   if (controller->CanGoBack()) {
     controller->GoBack();
     return;
   }
 
   // If we can't go back (because we opened a new tab), try to close the tab.
   // If this is the last tab, open a new window.
   if (BrowserList::size() == 1) {
     Browser* browser = *(BrowserList::begin());
     DCHECK(browser == chrome::FindBrowserWithWebContents(web_contents));
     if (browser->tab_count() == 1)
       chrome::NewEmptyWindow(browser->profile());
   }
 
   web_contents->GetDelegate()->CloseContents(web_contents);
 }
 
 ManagedModeWarningInfobarDelegate::ManagedModeWarningInfobarDelegate(
-    InfoBarService* infobar_service)
-    : ConfirmInfoBarDelegate(infobar_service) {}
+    InfoBarService* infobar_service,
+    int last_allowed_page)
+    : ConfirmInfoBarDelegate(infobar_service),
+      last_allowed_page_(last_allowed_page) {}
 
 ManagedModeWarningInfobarDelegate::~ManagedModeWarningInfobarDelegate() {}
 
 string16 ManagedModeWarningInfobarDelegate::GetMessageText() const {
   return l10n_util::GetStringUTF16(IDS_MANAGED_MODE_WARNING_MESSAGE);
 }
 
 int ManagedModeWarningInfobarDelegate::GetButtons() const {
   return BUTTON_OK;
 }
@@ skipping 20 matching lines @@
   // ManagedModeNavigationObserver removes us below.
   return false;
 }
 
 void ManagedModeWarningInfobarDelegate::InfoBarDismissed() {
   ManagedModeNavigationObserver* observer =
       ManagedModeNavigationObserver::FromWebContents(owner()->GetWebContents());
   observer->WarnInfobarDismissed();
 }
 
+class ManagedModePreviewInfobarDelegate : public ConfirmInfoBarDelegate {
+ public:
+  explicit ManagedModePreviewInfobarDelegate(
+      InfoBarService* infobar_service);
+
+ private:
+  virtual ~ManagedModePreviewInfobarDelegate();
+
+  // ConfirmInfoBarDelegate overrides:
+  virtual string16 GetMessageText() const OVERRIDE;
+  virtual int GetButtons() const OVERRIDE;
+  virtual string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
+  virtual bool Accept() OVERRIDE;
+  virtual bool Cancel() OVERRIDE;
+
+  // InfoBarDelegate override:
+  virtual bool ShouldExpire(
+      const content::LoadCommittedDetails& details) const OVERRIDE;
+  virtual void InfoBarDismissed() OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(ManagedModePreviewInfobarDelegate);
+};
+
+ManagedModePreviewInfobarDelegate::ManagedModePreviewInfobarDelegate(
+    InfoBarService* infobar_service)
+    : ConfirmInfoBarDelegate(infobar_service) {}
+
+ManagedModePreviewInfobarDelegate::~ManagedModePreviewInfobarDelegate() {}
+
+string16 ManagedModePreviewInfobarDelegate::GetMessageText() const {
+  return l10n_util::GetStringUTF16(IDS_MANAGED_MODE_PREVIEW_MESSAGE);
+}
+
+int ManagedModePreviewInfobarDelegate::GetButtons() const {
+  return BUTTON_OK | BUTTON_CANCEL;
+}
+
+string16 ManagedModePreviewInfobarDelegate::GetButtonLabel(
+    InfoBarButton button) const {
+  return l10n_util::GetStringUTF16(
+      (button == BUTTON_OK) ? IDS_MANAGED_MODE_PREVIEW_ACCEPT
+                            : IDS_MANAGED_MODE_GO_BACK_ACTION);
+}
+
+bool ManagedModePreviewInfobarDelegate::Accept() {
+  ManagedModeNavigationObserver* observer =
+      ManagedModeNavigationObserver::FromWebContents(
+          owner()->GetWebContents());
+  observer->AddSavedURLsToWhitelistAndClearState();
+  return true;
+}
+
+bool ManagedModePreviewInfobarDelegate::Cancel() {
+  GoBackToSafety(owner()->GetWebContents());
+  return false;
+}
+
+bool ManagedModePreviewInfobarDelegate::ShouldExpire(
+    const content::LoadCommittedDetails& details) const {
+  // ManagedModeNavigationObserver removes us below.
+  return false;
+}
+
+void ManagedModePreviewInfobarDelegate::InfoBarDismissed() {
+  ManagedModeNavigationObserver* observer =
+      ManagedModeNavigationObserver::FromWebContents(
+          owner()->GetWebContents());
+  observer->PreviewInfobarDismissed();
+}
+
 }  // namespace
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(ManagedModeNavigationObserver)
 
-ManagedModeNavigationObserver::~ManagedModeNavigationObserver() {}
+ManagedModeNavigationObserver::~ManagedModeNavigationObserver() {
+  RemoveTemporaryException();
+}
 
 ManagedModeNavigationObserver::ManagedModeNavigationObserver(
     content::WebContents* web_contents)
     : WebContentsObserver(web_contents),
       url_filter_(ManagedMode::GetURLFilterForUIThread()),
-      warn_infobar_delegate_(NULL) {}
+      warn_infobar_delegate_(NULL),
+      preview_infobar_delegate_(NULL),
+      state_(RECORDING_URLS_BEFORE_PREVIEW),
+      last_allowed_page_(-1) {}
+
+void ManagedModeNavigationObserver::AddTemporaryException() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(web_contents());
+
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&ManagedModeResourceThrottle::AddTemporaryException,
+                 web_contents()->GetRenderProcessHost()->GetID(),
+                 web_contents()->GetRenderViewHost()->GetRoutingID(),
+                 last_url_));
+}
+
+void ManagedModeNavigationObserver::RemoveTemporaryException() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  // When closing the browser web_contents() may return NULL so guard against
+  // that.
+  if (!web_contents())
+    return;
+
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&ManagedModeResourceThrottle::RemoveTemporaryException,
+                 web_contents()->GetRenderProcessHost()->GetID(),
+                 web_contents()->GetRenderViewHost()->GetRoutingID()));
+}
 
 void ManagedModeNavigationObserver::WarnInfobarDismissed() {
   DCHECK(warn_infobar_delegate_);
   warn_infobar_delegate_ = NULL;
 }
 
+void ManagedModeNavigationObserver::PreviewInfobarDismissed() {
+  DCHECK(preview_infobar_delegate_);
+  preview_infobar_delegate_ = NULL;
+}
+
+void ManagedModeNavigationObserver::AddSavedURLsToWhitelistAndClearState() {
+  ListValue whitelist;
+  for (std::set<GURL>::const_iterator it = navigated_urls_.begin();
+       it != navigated_urls_.end();
+       ++it) {
+    whitelist.AppendString(it->scheme() + "://." + it->host() + it->path());
+  }
+  if (last_url_.is_valid()) {
+    if (last_url_.SchemeIs("https")) {
+      whitelist.AppendString("https://" + last_url_.host());
+    } else {
+      whitelist.AppendString(last_url_.host());
+    }
+  }
+  ManagedMode::AddToManualList(true, whitelist);
+  ClearObserverState();
+}
+
+void ManagedModeNavigationObserver::AddURLToPatternList(const GURL& url) {
+  DCHECK(state_ != NOT_RECORDING_URLS);
+  navigated_urls_.insert(url);
+}
+
+void ManagedModeNavigationObserver::AddURLAsLastPattern(const GURL& url) {
+  DCHECK(state_ != NOT_RECORDING_URLS);
+
+  // Erase the last |url| if it is present in the |navigated_urls_|. This stops
+  // us from having both http://.www.google.com (exact URL from the pattern
+  // list) and www.google.com (hostname from the last URL pattern) in the list.
+  navigated_urls_.erase(url);
+  last_url_ = url;
+}
+
+void ManagedModeNavigationObserver::SetStateToRecordingAfterPreview() {
+  state_ = RECORDING_URLS_AFTER_PREVIEW;
+}
+
+bool ManagedModeNavigationObserver::CanTemporarilyNavigateHost(
+    const GURL& url) {
+  if (last_url_.scheme() == "https") {
+    return url.scheme() == "https" && last_url_.host() == url.host();
+  }
+  return last_url_.host() == url.host();
+}
+
+void ManagedModeNavigationObserver::ClearObserverState() {
+  if (state_ == NOT_RECORDING_URLS && preview_infobar_delegate_) {
+    InfoBarService* infobar_service =
+        InfoBarService::FromWebContents(web_contents());
+    infobar_service->RemoveInfoBar(preview_infobar_delegate_);
+    preview_infobar_delegate_ = NULL;
+  }
+  navigated_urls_.clear();
+  last_url_ = GURL();
+  state_ = RECORDING_URLS_BEFORE_PREVIEW;
+  RemoveTemporaryException();
+}
+
+void ManagedModeNavigationObserver::NavigateToPendingEntry(
+    const GURL& url,
+    content::NavigationController::ReloadType reload_type) {
+
+  // This method gets called first when a user navigates to a (new) URL.
+  // This means that the data related to the list of URLs needs to be cleared
+  // in certain circumstances.
+  if (web_contents()->GetController().GetCurrentEntryIndex() <
+          last_allowed_page_ || !CanTemporarilyNavigateHost(url)) {
+    ClearObserverState();
+  }
+}
+
+void ManagedModeNavigationObserver::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+
+  ManagedModeURLFilter::FilteringBehavior behavior =
+      url_filter_->GetFilteringBehaviorForURL(params.url);
+
+  // If the user just saw an interstitial this is the final URL so it is
+  // recorded. Checking for filtering behavior here isn't useful because
+  // although this specific URL can be allowed the hostname will be added which
+  // is more general. The hostname will be checked later when it is
+  // added to the actual whitelist to see if it is already present.
+  if (behavior == ManagedModeURLFilter::BLOCK && state_ != NOT_RECORDING_URLS)
+    AddURLAsLastPattern(params.url);
+
+  if (behavior == ManagedModeURLFilter::ALLOW &&
+      state_ != RECORDING_URLS_BEFORE_PREVIEW) {
+    // The initial page that triggered the interstitial was blocked but the
+    // final page is already in the whitelist so add the series of URLs
+    // which lead to the final page to the whitelist as well.
+    AddSavedURLsToWhitelistAndClearState();
+    InfoBarService* infobar_service =
+        InfoBarService::FromWebContents(web_contents());
+    infobar_service->AddInfoBar(new SimpleAlertInfoBarDelegate(
+        infobar_service,
+        NULL,
+        l10n_util::GetStringUTF16(IDS_MANAGED_MODE_ALREADY_ADDED_MESSAGE),
+        true));
+    return;
+  }
+
+  if (state_ == RECORDING_URLS_AFTER_PREVIEW) {
+    // A temporary exception should be added only if an interstitial was shown,
+    // the user clicked preview and the final page was not allowed. This
+    // temporary exception stops the interstitial from showing on further
+    // navigations to that host so that the user can navigate around to
+    // inspect it.
+    state_ = NOT_RECORDING_URLS;
+    AddTemporaryException();
+  }
+}
+
+void ManagedModeNavigationObserver::DidStartProvisionalLoadForFrame(
+    int64 frame_id,
+    int64 parent_frame_id,
+    bool is_main_frame,
+    const GURL& url,
+    bool is_error_page,
+    content::RenderViewHost* render_view_host) {
+  if (!is_main_frame)
+    return;
+}
+
+void ManagedModeNavigationObserver::ProvisionalChangeToMainFrameUrl(
+    const GURL& url,
+    content::RenderViewHost* render_view_host) {
+  // This function is the last one to be called before the resource throttle
+  // shows the interstitial if the URL must be blocked.
+  ManagedModeURLFilter::FilteringBehavior behavior =
+      url_filter_->GetFilteringBehaviorForURL(url);
+
+  if (state_ == NOT_RECORDING_URLS && !CanTemporarilyNavigateHost(url))
+    ClearObserverState();
+
+  if (behavior == ManagedModeURLFilter::BLOCK && state_ != NOT_RECORDING_URLS)
+    AddURLToPatternList(url);
+}
+
 void ManagedModeNavigationObserver::DidCommitProvisionalLoadForFrame(
     int64 frame_id,
     bool is_main_frame,
     const GURL& url,
     content::PageTransition transition_type,
     content::RenderViewHost* render_view_host) {
   if (!is_main_frame)
     return;
 
   ManagedModeURLFilter::FilteringBehavior behavior =
       url_filter_->GetFilteringBehaviorForURL(url);
 
   if (behavior == ManagedModeURLFilter::WARN) {
     if (!warn_infobar_delegate_) {
       InfoBarService* infobar_service =
           InfoBarService::FromWebContents(web_contents());
       warn_infobar_delegate_ =
-          new ManagedModeWarningInfobarDelegate(infobar_service);
+          new ManagedModeWarningInfobarDelegate(infobar_service,
+                                                last_allowed_page_);
       infobar_service->AddInfoBar(warn_infobar_delegate_);
     }
   } else {
     if (warn_infobar_delegate_) {
       InfoBarService* infobar_service =
           InfoBarService::FromWebContents(web_contents());
       infobar_service->RemoveInfoBar(warn_infobar_delegate_);
-      warn_infobar_delegate_= NULL;
+      warn_infobar_delegate_ = NULL;
     }
   }
 
+  if (behavior == ManagedModeURLFilter::BLOCK) {
+    switch (state_) {
+      case RECORDING_URLS_BEFORE_PREVIEW:
+        // Should not be in this state with a blocked URL.
+        NOTREACHED();
+        break;
+      case RECORDING_URLS_AFTER_PREVIEW:
+        // Add the infobar.
+        if (!preview_infobar_delegate_) {
+          InfoBarService* infobar_service =
+              InfoBarService::FromWebContents(web_contents());
+          preview_infobar_delegate_ =
+              new ManagedModePreviewInfobarDelegate(infobar_service);
+          infobar_service->AddInfoBar(preview_infobar_delegate_);
+        }
+        break;
+      case NOT_RECORDING_URLS:
+        // Check that the infobar is present.
+        DCHECK(preview_infobar_delegate_);
+        break;
+    }
+  }
+
+  if (behavior == ManagedModeURLFilter::ALLOW)
+    last_allowed_page_ = web_contents()->GetController().GetCurrentEntryIndex();
 }