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// Copyright 2014 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/supervised_user/supervised_user_interstitial.h"
#include "base/i18n/rtl.h"
#include "base/metrics/histogram.h"
#include "base/prefs/pref_service.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/infobars/infobar_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/supervised_user/supervised_user_service.h"
#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
#include "chrome/common/pref_names.h"
#include "components/infobars/core/infobar.h"
#include "components/infobars/core/infobar_delegate.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/interstitial_page.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "grit/browser_resources.h"
#include "grit/generated_resources.h"
#include "net/base/net_util.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/webui/jstemplate_builder.h"
#include "ui/base/webui/web_ui_util.h"
using content::BrowserThread;
// static
void SupervisedUserInterstitial::Show(content::WebContents* web_contents,
const GURL& url,
const base::Callback<void(bool)>& callback) {
SupervisedUserInterstitial* interstitial =
new SupervisedUserInterstitial(web_contents, url, callback);
// If Init() does not complete fully, immediately delete the interstitial.
if (!interstitial->Init())
delete interstitial;
// Otherwise |interstitial_page_| is responsible for deleting it.
}
SupervisedUserInterstitial::SupervisedUserInterstitial(
content::WebContents* web_contents,
const GURL& url,
const base::Callback<void(bool)>& callback)
: web_contents_(web_contents),
interstitial_page_(NULL),
url_(url),
callback_(callback) {}
SupervisedUserInterstitial::~SupervisedUserInterstitial() {}
bool SupervisedUserInterstitial::Init() {
if (ShouldProceed()) {
// It can happen that the site was only allowed very recently and the URL
// filter on the IO thread had not been updated yet. Proceed with the
// request without showing the interstitial.
DispatchContinueRequest(true);
return false;
}
InfoBarService* service = InfoBarService::FromWebContents(web_contents_);
if (service) {
// Remove all the infobars which are attached to |web_contents_| and for
// which ShouldExpire() returns true.
content::LoadCommittedDetails details;
// |details.is_in_page| is default false, and |details.is_main_frame| is
// default true. This results in is_navigation_to_different_page() returning
// true.
DCHECK(details.is_navigation_to_different_page());
const content::NavigationController& controller =
web_contents_->GetController();
details.entry = controller.GetActiveEntry();
if (controller.GetLastCommittedEntry()) {
details.previous_entry_index = controller.GetLastCommittedEntryIndex();
details.previous_url = controller.GetLastCommittedEntry()->GetURL();
}
details.type = content::NAVIGATION_TYPE_NEW_PAGE;
for (int i = service->infobar_count() - 1; i >= 0; --i) {
infobars::InfoBar* infobar = service->infobar_at(i);
if (infobar->delegate()->ShouldExpire(
InfoBarService::NavigationDetailsFromLoadCommittedDetails(
details)))
service->RemoveInfoBar(infobar);
}
}
// TODO(bauerb): Extract an observer callback on SupervisedUserService for
// this.
Profile* profile =
Profile::FromBrowserContext(web_contents_->GetBrowserContext());
PrefService* prefs = profile->GetPrefs();
pref_change_registrar_.Init(prefs);
pref_change_registrar_.Add(
prefs::kDefaultSupervisedUserFilteringBehavior,
base::Bind(&SupervisedUserInterstitial::OnFilteringPrefsChanged,
base::Unretained(this)));
pref_change_registrar_.Add(
prefs::kSupervisedUserManualHosts,
base::Bind(&SupervisedUserInterstitial::OnFilteringPrefsChanged,
base::Unretained(this)));
pref_change_registrar_.Add(
prefs::kSupervisedUserManualURLs,
base::Bind(&SupervisedUserInterstitial::OnFilteringPrefsChanged,
base::Unretained(this)));
languages_ = prefs->GetString(prefs::kAcceptLanguages);
interstitial_page_ =
content::InterstitialPage::Create(web_contents_, true, url_, this);
interstitial_page_->Show();
return true;
}
std::string SupervisedUserInterstitial::GetHTMLContents() {
base::DictionaryValue strings;
strings.SetString("blockPageTitle",
l10n_util::GetStringUTF16(IDS_BLOCK_INTERSTITIAL_TITLE));
Profile* profile =
Profile::FromBrowserContext(web_contents_->GetBrowserContext());
SupervisedUserService* supervised_user_service =
SupervisedUserServiceFactory::GetForProfile(profile);
bool allow_access_requests = supervised_user_service->AccessRequestsEnabled();
strings.SetBoolean("allowAccessRequests", allow_access_requests);
base::string16 custodian =
base::UTF8ToUTF16(supervised_user_service->GetCustodianName());
strings.SetString(
"blockPageMessage",
allow_access_requests
? l10n_util::GetStringFUTF16(IDS_BLOCK_INTERSTITIAL_MESSAGE,
custodian)
: l10n_util::GetStringUTF16(
IDS_BLOCK_INTERSTITIAL_MESSAGE_ACCESS_REQUESTS_DISABLED));
strings.SetString("backButton", l10n_util::GetStringUTF16(IDS_BACK_BUTTON));
strings.SetString(
"requestAccessButton",
l10n_util::GetStringUTF16(IDS_BLOCK_INTERSTITIAL_REQUEST_ACCESS_BUTTON));
strings.SetString(
"requestSentMessage",
l10n_util::GetStringFUTF16(IDS_BLOCK_INTERSTITIAL_REQUEST_SENT_MESSAGE,
custodian));
webui::SetFontAndTextDirection(&strings);
base::StringPiece html(ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_SUPERVISED_USER_BLOCK_INTERSTITIAL_HTML));
webui::UseVersion2 version;
return webui::GetI18nTemplateHtml(html, &strings);
}
void SupervisedUserInterstitial::CommandReceived(const std::string& command) {
// For use in histograms.
enum Commands {
PREVIEW,
BACK,
NTP,
ACCESS_REQUEST,
HISTOGRAM_BOUNDING_VALUE
};
if (command == "\"back\"") {
UMA_HISTOGRAM_ENUMERATION("ManagedMode.BlockingInterstitialCommand",
BACK,
HISTOGRAM_BOUNDING_VALUE);
interstitial_page_->DontProceed();
return;
}
if (command == "\"request\"") {
UMA_HISTOGRAM_ENUMERATION("ManagedMode.BlockingInterstitialCommand",
ACCESS_REQUEST,
HISTOGRAM_BOUNDING_VALUE);
Profile* profile =
Profile::FromBrowserContext(web_contents_->GetBrowserContext());
SupervisedUserService* supervised_user_service =
SupervisedUserServiceFactory::GetForProfile(profile);
supervised_user_service->AddAccessRequest(url_);
DVLOG(1) << "Sent access request for " << url_.spec();
return;
}
NOTREACHED();
}
void SupervisedUserInterstitial::OnProceed() {
// CHECK instead of DCHECK as defense in depth in case we'd accidentally
// proceed on a blocked page.
CHECK(ShouldProceed());
DispatchContinueRequest(true);
}
void SupervisedUserInterstitial::OnDontProceed() {
DispatchContinueRequest(false);
}
bool SupervisedUserInterstitial::ShouldProceed() {
Profile* profile =
Profile::FromBrowserContext(web_contents_->GetBrowserContext());
SupervisedUserService* supervised_user_service =
SupervisedUserServiceFactory::GetForProfile(profile);
SupervisedUserURLFilter* url_filter =
supervised_user_service->GetURLFilterForUIThread();
return url_filter->GetFilteringBehaviorForURL(url_) !=
SupervisedUserURLFilter::BLOCK;
}
void SupervisedUserInterstitial::OnFilteringPrefsChanged() {
if (ShouldProceed())
interstitial_page_->Proceed();
}
void SupervisedUserInterstitial::DispatchContinueRequest(
bool continue_request) {
// If there is no history entry to go back to, close the tab instead.
int nav_entry_count = web_contents_->GetController().GetEntryCount();
if (!continue_request && nav_entry_count == 0)
web_contents_->Close();
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE, base::Bind(callback_, continue_request));
}
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