src/chrome/browser/managed_mode/managed_mode_interstitial.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/managed_mode/managed_mode_interstitial.h"
   6
   7 #include "base/i18n/rtl.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "base/values.h"
  12 #include "chrome/browser/infobars/infobar_service.h"
  13 #include "chrome/browser/managed_mode/managed_user_service.h"
  14 #include "chrome/browser/managed_mode/managed_user_service_factory.h"
  15 #include "chrome/browser/profiles/profile.h"
  16 #include "chrome/common/pref_names.h"
  17 #include "components/infobars/core/infobar.h"
  18 #include "components/infobars/core/infobar_delegate.h"
  19 #include "content/public/browser/browser_thread.h"
  20 #include "content/public/browser/interstitial_page.h"
  21 #include "content/public/browser/navigation_controller.h"
  22 #include "content/public/browser/navigation_details.h"
  23 #include "content/public/browser/navigation_entry.h"
  24 #include "content/public/browser/web_contents.h"
  25 #include "content/public/browser/web_ui.h"
  26 #include "grit/browser_resources.h"
  27 #include "grit/generated_resources.h"
  28 #include "net/base/net_util.h"
  29 #include "ui/base/l10n/l10n_util.h"
  30 #include "ui/base/resource/resource_bundle.h"
  31 #include "ui/base/webui/jstemplate_builder.h"
  32 #include "ui/base/webui/web_ui_util.h"
  33
  34 using content::BrowserThread;
  35
  36 // static
  37 void ManagedModeInterstitial::Show(content::WebContents* web_contents,
  38                                    const GURL& url,
  39                                    const base::Callback<void(bool)>& callback) {
  40   ManagedModeInterstitial* interstitial =
  41       new ManagedModeInterstitial(web_contents, url, callback);
  42
  43   // If Init() does not complete fully, immediately delete the interstitial.
  44   if (!interstitial->Init())
  45     delete interstitial;
  46   // Otherwise |interstitial_page_| is responsible for deleting it.
  47 }
  48
  49 ManagedModeInterstitial::ManagedModeInterstitial(
  50     content::WebContents* web_contents,
  51     const GURL& url,
  52     const base::Callback<void(bool)>& callback)
  53     : web_contents_(web_contents),
  54       interstitial_page_(NULL),
  55       url_(url),
  56       callback_(callback) {}
  57
  58 ManagedModeInterstitial::~ManagedModeInterstitial() {}
  59
  60 bool ManagedModeInterstitial::Init() {
  61   if (ShouldProceed()) {
  62     // It can happen that the site was only allowed very recently and the URL
  63     // filter on the IO thread had not been updated yet. Proceed with the
  64     // request without showing the interstitial.
  65     DispatchContinueRequest(true);
  66     return false;
  67   }
  68
  69   InfoBarService* service = InfoBarService::FromWebContents(web_contents_);
  70   if (service) {
  71     // Remove all the infobars which are attached to |web_contents_| and for
  72     // which ShouldExpire() returns true.
  73     content::LoadCommittedDetails details;
  74     // |details.is_in_page| is default false, and |details.is_main_frame| is
  75     // default true. This results in is_navigation_to_different_page() returning
  76     // true.
  77     DCHECK(details.is_navigation_to_different_page());
  78     const content::NavigationController& controller =
  79         web_contents_->GetController();
  80     details.entry = controller.GetActiveEntry();
  81     if (controller.GetLastCommittedEntry()) {
  82       details.previous_entry_index = controller.GetLastCommittedEntryIndex();
  83       details.previous_url = controller.GetLastCommittedEntry()->GetURL();
  84     }
  85     details.type = content::NAVIGATION_TYPE_NEW_PAGE;
  86     for (int i = service->infobar_count() - 1; i >= 0; --i) {
  87       infobars::InfoBar* infobar = service->infobar_at(i);
  88       if (infobar->delegate()->ShouldExpire(
  89               InfoBarService::NavigationDetailsFromLoadCommittedDetails(
  90                   details)))
  91         service->RemoveInfoBar(infobar);
  92     }
  93   }
  94
  95   // TODO(bauerb): Extract an observer callback on ManagedUserService for this.
  96   Profile* profile =
  97       Profile::FromBrowserContext(web_contents_->GetBrowserContext());
  98   PrefService* prefs = profile->GetPrefs();
  99   pref_change_registrar_.Init(prefs);
 100   pref_change_registrar_.Add(
 101       prefs::kDefaultManagedModeFilteringBehavior,
 102       base::Bind(&ManagedModeInterstitial::OnFilteringPrefsChanged,
 103                  base::Unretained(this)));
 104   pref_change_registrar_.Add(
 105       prefs::kManagedModeManualHosts,
 106       base::Bind(&ManagedModeInterstitial::OnFilteringPrefsChanged,
 107                  base::Unretained(this)));
 108   pref_change_registrar_.Add(
 109       prefs::kManagedModeManualURLs,
 110       base::Bind(&ManagedModeInterstitial::OnFilteringPrefsChanged,
 111                  base::Unretained(this)));
 112
 113   languages_ = prefs->GetString(prefs::kAcceptLanguages);
 114   interstitial_page_ =
 115       content::InterstitialPage::Create(web_contents_, true, url_, this);
 116   interstitial_page_->Show();
 117
 118   return true;
 119 }
 120
 121 std::string ManagedModeInterstitial::GetHTMLContents() {
 122   base::DictionaryValue strings;
 123   strings.SetString("blockPageTitle",
 124                     l10n_util::GetStringUTF16(IDS_BLOCK_INTERSTITIAL_TITLE));
 125
 126   Profile* profile =
 127       Profile::FromBrowserContext(web_contents_->GetBrowserContext());
 128   ManagedUserService* managed_user_service =
 129       ManagedUserServiceFactory::GetForProfile(profile);
 130
 131   bool allow_access_requests = managed_user_service->AccessRequestsEnabled();
 132   strings.SetBoolean("allowAccessRequests", allow_access_requests);
 133
 134   base::string16 custodian =
 135       base::UTF8ToUTF16(managed_user_service->GetCustodianName());
 136   strings.SetString(
 137       "blockPageMessage",
 138       allow_access_requests
 139           ? l10n_util::GetStringFUTF16(IDS_BLOCK_INTERSTITIAL_MESSAGE,
 140                                        custodian)
 141           : l10n_util::GetStringUTF16(
 142                 IDS_BLOCK_INTERSTITIAL_MESSAGE_ACCESS_REQUESTS_DISABLED));
 143
 144   strings.SetString("backButton", l10n_util::GetStringUTF16(IDS_BACK_BUTTON));
 145   strings.SetString(
 146       "requestAccessButton",
 147       l10n_util::GetStringUTF16(IDS_BLOCK_INTERSTITIAL_REQUEST_ACCESS_BUTTON));
 148
 149   strings.SetString(
 150       "requestSentMessage",
 151       l10n_util::GetStringFUTF16(IDS_BLOCK_INTERSTITIAL_REQUEST_SENT_MESSAGE,
 152                                  custodian));
 153
 154   webui::SetFontAndTextDirection(&strings);
 155
 156   base::StringPiece html(ResourceBundle::GetSharedInstance().GetRawDataResource(
 157       IDR_MANAGED_MODE_BLOCK_INTERSTITIAL_HTML));
 158
 159   webui::UseVersion2 version;
 160   return webui::GetI18nTemplateHtml(html, &strings);
 161 }
 162
 163 void ManagedModeInterstitial::CommandReceived(const std::string& command) {
 164   // For use in histograms.
 165   enum Commands {
 166     PREVIEW,
 167     BACK,
 168     NTP,
 169     ACCESS_REQUEST,
 170     HISTOGRAM_BOUNDING_VALUE
 171   };
 172
 173   if (command == "\"back\"") {
 174     UMA_HISTOGRAM_ENUMERATION("ManagedMode.BlockingInterstitialCommand",
 175                               BACK,
 176                               HISTOGRAM_BOUNDING_VALUE);
 177     interstitial_page_->DontProceed();
 178     return;
 179   }
 180
 181   if (command == "\"request\"") {
 182     UMA_HISTOGRAM_ENUMERATION("ManagedMode.BlockingInterstitialCommand",
 183                               ACCESS_REQUEST,
 184                               HISTOGRAM_BOUNDING_VALUE);
 185
 186     Profile* profile =
 187         Profile::FromBrowserContext(web_contents_->GetBrowserContext());
 188     ManagedUserService* managed_user_service =
 189         ManagedUserServiceFactory::GetForProfile(profile);
 190     managed_user_service->AddAccessRequest(url_);
 191     DVLOG(1) << "Sent access request for " << url_.spec();
 192
 193     return;
 194   }
 195
 196   NOTREACHED();
 197 }
 198
 199 void ManagedModeInterstitial::OnProceed() {
 200   // CHECK instead of DCHECK as defense in depth in case we'd accidentally
 201   // proceed on a blocked page.
 202   CHECK(ShouldProceed());
 203   DispatchContinueRequest(true);
 204 }
 205
 206 void ManagedModeInterstitial::OnDontProceed() {
 207   DispatchContinueRequest(false);
 208 }
 209
 210 bool ManagedModeInterstitial::ShouldProceed() {
 211   Profile* profile =
 212       Profile::FromBrowserContext(web_contents_->GetBrowserContext());
 213   ManagedUserService* managed_user_service =
 214       ManagedUserServiceFactory::GetForProfile(profile);
 215   ManagedModeURLFilter* url_filter =
 216       managed_user_service->GetURLFilterForUIThread();
 217   return url_filter->GetFilteringBehaviorForURL(url_) !=
 218          ManagedModeURLFilter::BLOCK;
 219 }
 220
 221 void ManagedModeInterstitial::OnFilteringPrefsChanged() {
 222   if (ShouldProceed())
 223     interstitial_page_->Proceed();
 224 }
 225
 226 void ManagedModeInterstitial::DispatchContinueRequest(bool continue_request) {
 227   // If there is no history entry to go back to, close the tab instead.
 228   int nav_entry_count = web_contents_->GetController().GetEntryCount();
 229   if (!continue_request && nav_entry_count == 0)
 230     web_contents_->Close();
 231
 232   BrowserThread::PostTask(
 233       BrowserThread::IO, FROM_HERE, base::Bind(callback_, continue_request));
 234 }