Adding CookieSettings for storing cookie content settings.

chrome/browser/content_settings/cookie_settings.cc

+// Copyright (c) 2011 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/content_settings/cookie_settings.h"
+
+#include "base/command_line.h"
+#include "chrome/browser/content_settings/content_settings_utils.h"
+#include "chrome/browser/content_settings/host_content_settings_map.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_dependency_manager.h"
+#include "chrome/browser/profiles/profile_keyed_service.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/content_settings_pattern.h"
+#include "chrome/common/pref_names.h"
+#include "content/browser/browser_thread.h"
+#include "content/browser/user_metrics.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_source.h"
+#include "googleurl/src/gurl.h"
+#include "net/base/net_errors.h"
+#include "net/base/static_cookie_policy.h"
+
+namespace {
+
+bool IsValidSetting(ContentSetting setting) {
+  return (setting == CONTENT_SETTING_ALLOW ||
+          setting == CONTENT_SETTING_SESSION_ONLY ||
+          setting == CONTENT_SETTING_BLOCK);
+}
+
+bool IsAllowed(ContentSetting setting) {
+  DCHECK(IsValidSetting(setting));
+  return (setting == CONTENT_SETTING_ALLOW ||
+          setting == CONTENT_SETTING_SESSION_ONLY);
+}
+
+}  // namespace
+
+// |ProfileKeyedFactory| is the owner of the |ProfileKeyedService|s. This
+// wrapper class allows others to hold shared pointers to CookieSettings.
+class CookieSettingsWrapper : public ProfileKeyedService {
+ public:
+  explicit CookieSettingsWrapper(scoped_refptr<CookieSettings> cookie_settings)
+      : cookie_settings_(cookie_settings) {}
+  virtual ~CookieSettingsWrapper() {}
+
+  CookieSettings* cookie_settings() { return cookie_settings_.get(); }
+
+ private:
+  // ProfileKeyedService methods:
+  virtual void Shutdown() OVERRIDE {
+    cookie_settings_->ShutdownOnUIThread();
+  }
+
+  scoped_refptr<CookieSettings> cookie_settings_;
+};
+
+// static
+CookieSettings::Factory* CookieSettings::Factory::GetInstance() {
+  return Singleton<CookieSettings::Factory>::get();
+}
+
+CookieSettingsWrapper* CookieSettings::Factory::GetWrapperForProfile(
+    Profile* profile) {
+  return static_cast<CookieSettingsWrapper*>(
+      GetServiceForProfile(profile,true));
+}
+
+CookieSettings::Factory::Factory()
+    : ProfileKeyedServiceFactory(ProfileDependencyManager::GetInstance()) {
+}
+
+ProfileKeyedService* CookieSettings::Factory::BuildServiceInstanceFor(
+      Profile* profile) const {
+  scoped_refptr<CookieSettings> cookie_settings = new CookieSettings(
+      profile->GetHostContentSettingsMap(),
+      profile->GetPrefs());
+  return new CookieSettingsWrapper(cookie_settings);
+}
+
+CookieSettings::CookieSettings(
+    HostContentSettingsMap* host_content_settings_map,
+    PrefService* prefs)
+    : host_content_settings_map_(host_content_settings_map),
+      block_third_party_cookies_(
+          prefs->GetBoolean(prefs::kBlockThirdPartyCookies)) {
+  if (block_third_party_cookies_) {
+    UserMetrics::RecordAction(
+        UserMetricsAction("ThirdPartyCookieBlockingEnabled"));
+  } else {
+    UserMetrics::RecordAction(
+        UserMetricsAction("ThirdPartyCookieBlockingDisabled"));
+  }
+
+  pref_change_registrar_.Init(prefs);
+  pref_change_registrar_.Add(prefs::kBlockThirdPartyCookies, this);
+}
+
+CookieSettings::~CookieSettings() {
+}
+
+// static
+CookieSettings* CookieSettings::GetForProfile(Profile* profile) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  CookieSettings* cookie_settings =
+      Factory::GetInstance()->GetWrapperForProfile(profile)->cookie_settings();
+  DCHECK(cookie_settings);
+  return cookie_settings;
+}
+
+ContentSetting
+CookieSettings::GetDefaultCookieSetting(std::string* provider_id) const {
+  return host_content_settings_map_->GetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_COOKIES, provider_id);
+}
+
+bool CookieSettings::IsReadingCookieAllowed(const GURL& url,
+                                            const GURL& first_party_url) const {
+  ContentSetting setting = GetCookieSetting(url, first_party_url, false);
+  return IsAllowed(setting);
+}
+
+bool CookieSettings::IsSettingCookieAllowed(const GURL& url,
+                                            const GURL& first_party_url) const {
+  ContentSetting setting = GetCookieSetting(url, first_party_url, true);
+  return IsAllowed(setting);
+}
+
+bool CookieSettings::IsCookieSessionOnly(const GURL& origin) const {
+  ContentSetting setting = GetCookieSetting(origin, origin, true);
+  DCHECK(IsValidSetting(setting));
+  return (setting == CONTENT_SETTING_SESSION_ONLY);
+}
+
+void CookieSettings::GetCookieSettings(
+    ContentSettingsForOneType* settings) const {
+  return host_content_settings_map_->GetSettingsForOneType(
+      CONTENT_SETTINGS_TYPE_COOKIES, "", settings);
+}
+
+void CookieSettings::SetDefaultCookieSetting(ContentSetting setting) {
+  DCHECK(IsValidSetting(setting));
+  host_content_settings_map_->SetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_COOKIES, setting);
+}
+
+void CookieSettings::SetCookieSetting(
+    const ContentSettingsPattern& primary_pattern,
+    const ContentSettingsPattern& secondary_pattern,
+    ContentSetting setting) {
+  DCHECK(IsValidSetting(setting));
+  if (setting == CONTENT_SETTING_SESSION_ONLY) {
+    DCHECK(secondary_pattern == ContentSettingsPattern::Wildcard());
+  }
+  host_content_settings_map_->SetContentSetting(
+      primary_pattern, secondary_pattern, CONTENT_SETTINGS_TYPE_COOKIES, "",
+      setting);
+}
+
+void CookieSettings::ResetCookieSetting(
+    const ContentSettingsPattern& primary_pattern,
+    const ContentSettingsPattern& secondary_pattern) {
+  host_content_settings_map_->SetContentSetting(
+      primary_pattern, secondary_pattern, CONTENT_SETTINGS_TYPE_COOKIES, "",
+      CONTENT_SETTING_DEFAULT);
+}
+
+void CookieSettings::Observe(int type,
+                             const content::NotificationSource& source,
+                             const content::NotificationDetails& details) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  if (type == chrome::NOTIFICATION_PREF_CHANGED) {
+    PrefService* prefs = content::Source<PrefService>(source).ptr();
+    std::string* name = content::Details<std::string>(details).ptr();
+    if (*name == prefs::kBlockThirdPartyCookies) {
+      base::AutoLock auto_lock(lock_);
+      block_third_party_cookies_ = prefs->GetBoolean(
+          prefs::kBlockThirdPartyCookies);
+    } else {
+      NOTREACHED() << "Unexpected preference observed";
+      return;
+    }
+  } else {
+    NOTREACHED() << "Unexpected notification";
+  }
+}
+
+void CookieSettings::ShutdownOnUIThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  pref_change_registrar_.RemoveAll();
+}
+
+ContentSetting CookieSettings::GetCookieSetting(
+    const GURL& url,
+    const GURL& first_party_url,
+    bool setting_cookie) const {
+  if (HostContentSettingsMap::ShouldAllowAllContent(
+          first_party_url,
+          CONTENT_SETTINGS_TYPE_COOKIES)) {
+    return CONTENT_SETTING_ALLOW;
+  }
+
+  ContentSettingsPattern primary_pattern;
+  ContentSettingsPattern secondary_pattern;
+  // First get any host-specific settings.
+  scoped_ptr<base::Value> value(
+      host_content_settings_map_->GetContentSettingValue(
+          url, first_party_url, CONTENT_SETTINGS_TYPE_COOKIES, "",
+          &primary_pattern, &secondary_pattern));
+
+  // If no explicit exception has been made and third-party cookies are blocked
+  // by default, apply that rule.
+  if (primary_pattern == ContentSettingsPattern::Wildcard() &&
+      secondary_pattern == ContentSettingsPattern::Wildcard() &&
+      ShouldBlockThirdPartyCookies()) {
+    bool strict = CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kBlockReadingThirdPartyCookies);
+    net::StaticCookiePolicy policy(strict ?
+        net::StaticCookiePolicy::BLOCK_ALL_THIRD_PARTY_COOKIES :
+        net::StaticCookiePolicy::BLOCK_SETTING_THIRD_PARTY_COOKIES);
+    int rv;
+    if (setting_cookie)
+      rv = policy.CanSetCookie(url, first_party_url);
+    else
+      rv = policy.CanGetCookies(url, first_party_url);
+    DCHECK_NE(net::ERR_IO_PENDING, rv);
+    if (rv != net::OK)
+      return CONTENT_SETTING_BLOCK;
+  }
+
+  // We should always have a value, at least from the default provider.
+  DCHECK(value.get());
+  return content_settings::ValueToContentSetting(value.get());
+}
+
+// static
+void CookieSettings::RegisterUserPrefs(PrefService* prefs) {
+  prefs->RegisterBooleanPref(prefs::kBlockThirdPartyCookies,
+                             false,
+                             PrefService::SYNCABLE_PREF);
+}
+
+bool CookieSettings::ShouldBlockThirdPartyCookies() const {
+  base::AutoLock auto_lock(lock_);
+  return block_third_party_cookies_;
+}