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// Copyright (c) 2010 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.
// Implementation of the geolocation content settings map. Styled on
// HostContentSettingsMap however unlike that class, this one does not hold
// an additional in-memory copy of the settings as it does not need to support
// thread safe synchronous access to the settings; all geolocation permissions
// are read and written in the UI thread. (If in future this is no longer the
// case, refer to http://codereview.chromium.org/1525018 for a previous version
// with caching. Note that as we must observe the prefs store for settings
// changes, e.g. coming from the sync engine, the simplest design would be to
// always write-through changes straight to the prefs store, and rely on the
// notification observer to subsequently update any cached copy).
#include "chrome/browser/geolocation/geolocation_content_settings_map.h"
#include <string>
#include "base/string_piece.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/content_settings/content_settings_details.h"
#include "chrome/browser/content_settings/content_settings_pattern.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/prefs/scoped_pref_update.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/notification_source.h"
#include "chrome/common/notification_type.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "net/base/dns_util.h"
#include "net/base/static_cookie_policy.h"
// static
const ContentSetting
GeolocationContentSettingsMap::kDefaultSetting = CONTENT_SETTING_ASK;
GeolocationContentSettingsMap::GeolocationContentSettingsMap(Profile* profile)
: profile_(profile) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
prefs_registrar_.Init(profile_->GetPrefs());
prefs_registrar_.Add(prefs::kGeolocationDefaultContentSetting, this);
prefs_registrar_.Add(prefs::kGeolocationContentSettings, this);
notification_registrar_.Add(this, NotificationType::PROFILE_DESTROYED,
Source<Profile>(profile_));
}
// static
void GeolocationContentSettingsMap::RegisterUserPrefs(PrefService* prefs) {
prefs->RegisterIntegerPref(prefs::kGeolocationDefaultContentSetting,
CONTENT_SETTING_ASK);
prefs->RegisterDictionaryPref(prefs::kGeolocationContentSettings);
}
ContentSetting GeolocationContentSettingsMap::GetDefaultContentSetting() const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// If the profile is destroyed (and set to NULL) return CONTENT_SETTING_BLOCK.
if (!profile_)
return CONTENT_SETTING_BLOCK;
const PrefService* prefs = profile_->GetPrefs();
const ContentSetting default_content_setting = IntToContentSetting(
prefs->GetInteger(prefs::kGeolocationDefaultContentSetting));
return default_content_setting == CONTENT_SETTING_DEFAULT ?
kDefaultSetting : default_content_setting;
}
bool GeolocationContentSettingsMap::IsDefaultContentSettingManaged() const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// If the profile is destroyed (and set to NULL) return true.
if (!profile_)
return true;
return profile_->GetPrefs()->IsManagedPreference(
prefs::kGeolocationDefaultContentSetting);
}
ContentSetting GeolocationContentSettingsMap::GetContentSetting(
const GURL& requesting_url,
const GURL& embedding_url) const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(requesting_url.is_valid() && embedding_url.is_valid());
GURL requesting_origin(requesting_url.GetOrigin());
GURL embedding_origin(embedding_url.GetOrigin());
DCHECK(requesting_origin.is_valid() && embedding_origin.is_valid());
// If the profile is destroyed (and set to NULL) return CONTENT_SETTING_BLOCK.
if (!profile_)
return CONTENT_SETTING_BLOCK;
const DictionaryValue* all_settings_dictionary =
profile_->GetPrefs()->GetDictionary(prefs::kGeolocationContentSettings);
// Careful: The returned value could be NULL if the pref has never been set.
if (all_settings_dictionary != NULL) {
DictionaryValue* requesting_origin_settings;
if (all_settings_dictionary->GetDictionaryWithoutPathExpansion(
requesting_origin.spec(), &requesting_origin_settings)) {
int setting;
if (requesting_origin_settings->GetIntegerWithoutPathExpansion(
embedding_origin.spec(), &setting))
return IntToContentSetting(setting);
// Check for any-embedder setting
if (requesting_origin != embedding_origin &&
requesting_origin_settings->GetIntegerWithoutPathExpansion(
"", &setting))
return IntToContentSetting(setting);
}
}
return GetDefaultContentSetting();
}
GeolocationContentSettingsMap::AllOriginsSettings
GeolocationContentSettingsMap::GetAllOriginsSettings() const {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
AllOriginsSettings content_settings;
const DictionaryValue* all_settings_dictionary =
profile_->GetPrefs()->GetDictionary(prefs::kGeolocationContentSettings);
// Careful: The returned value could be NULL if the pref has never been set.
if (all_settings_dictionary != NULL) {
for (DictionaryValue::key_iterator i(all_settings_dictionary->begin_keys());
i != all_settings_dictionary->end_keys(); ++i) {
const std::string& origin(*i);
GURL origin_as_url(origin);
if (!origin_as_url.is_valid())
continue;
DictionaryValue* requesting_origin_settings_dictionary = NULL;
bool found = all_settings_dictionary->GetDictionaryWithoutPathExpansion(
origin, &requesting_origin_settings_dictionary);
DCHECK(found);
if (!requesting_origin_settings_dictionary)
continue;
GetOneOriginSettingsFromDictionary(
requesting_origin_settings_dictionary,
&content_settings[origin_as_url]);
}
}
return content_settings;
}
void GeolocationContentSettingsMap::SetDefaultContentSetting(
ContentSetting setting) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!profile_)
return;
profile_->GetPrefs()->SetInteger(prefs::kGeolocationDefaultContentSetting,
setting == CONTENT_SETTING_DEFAULT ?
kDefaultSetting : setting);
}
void GeolocationContentSettingsMap::SetContentSetting(
const GURL& requesting_url,
const GURL& embedding_url,
ContentSetting setting) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(requesting_url.is_valid());
DCHECK(embedding_url.is_valid() || embedding_url.is_empty());
GURL requesting_origin(requesting_url.GetOrigin());
GURL embedding_origin(embedding_url.GetOrigin());
DCHECK(requesting_origin.is_valid());
DCHECK(embedding_origin.is_valid() || embedding_url.is_empty());
if (!profile_)
return;
PrefService* prefs = profile_->GetPrefs();
DictionaryValue* all_settings_dictionary = prefs->GetMutableDictionary(
prefs::kGeolocationContentSettings);
DCHECK(all_settings_dictionary);
ScopedPrefUpdate update(prefs, prefs::kGeolocationContentSettings);
DictionaryValue* requesting_origin_settings_dictionary = NULL;
all_settings_dictionary->GetDictionaryWithoutPathExpansion(
requesting_origin.spec(), &requesting_origin_settings_dictionary);
if (setting == CONTENT_SETTING_DEFAULT) {
if (requesting_origin_settings_dictionary) {
requesting_origin_settings_dictionary->RemoveWithoutPathExpansion(
embedding_origin.spec(), NULL);
if (requesting_origin_settings_dictionary->empty())
all_settings_dictionary->RemoveWithoutPathExpansion(
requesting_origin.spec(), NULL);
}
} else {
if (!requesting_origin_settings_dictionary) {
requesting_origin_settings_dictionary = new DictionaryValue;
all_settings_dictionary->SetWithoutPathExpansion(
requesting_origin.spec(), requesting_origin_settings_dictionary);
}
DCHECK(requesting_origin_settings_dictionary);
requesting_origin_settings_dictionary->SetWithoutPathExpansion(
embedding_origin.spec(), Value::CreateIntegerValue(setting));
}
}
void GeolocationContentSettingsMap::ResetToDefault() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!profile_)
return;
PrefService* prefs = profile_->GetPrefs();
prefs->ClearPref(prefs::kGeolocationDefaultContentSetting);
prefs->ClearPref(prefs::kGeolocationContentSettings);
}
void GeolocationContentSettingsMap::NotifyObservers(
const ContentSettingsDetails& details) {
NotificationService::current()->Notify(
NotificationType::GEOLOCATION_SETTINGS_CHANGED,
Source<GeolocationContentSettingsMap>(this),
Details<const ContentSettingsDetails>(&details));
}
void GeolocationContentSettingsMap::Observe(
NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == NotificationType::PREF_CHANGED) {
const std::string& name = *Details<std::string>(details).ptr();
if (name == prefs::kGeolocationDefaultContentSetting) {
NotifyObservers(ContentSettingsDetails(
ContentSettingsPattern(),
CONTENT_SETTINGS_TYPE_DEFAULT,
""));
}
} else if (NotificationType::PROFILE_DESTROYED == type) {
UnregisterObservers();
} else {
NOTREACHED();
}
}
void GeolocationContentSettingsMap::UnregisterObservers() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (!profile_)
return;
prefs_registrar_.RemoveAll();
notification_registrar_.Remove(this, NotificationType::PROFILE_DESTROYED,
Source<Profile>(profile_));
profile_ = NULL;
}
GeolocationContentSettingsMap::~GeolocationContentSettingsMap() {
UnregisterObservers();
}
// static
void GeolocationContentSettingsMap::GetOneOriginSettingsFromDictionary(
const DictionaryValue* dictionary,
OneOriginSettings* one_origin_settings) {
for (DictionaryValue::key_iterator i(dictionary->begin_keys());
i != dictionary->end_keys(); ++i) {
const std::string& target(*i);
int setting = kDefaultSetting;
bool found = dictionary->GetIntegerWithoutPathExpansion(target, &setting);
DCHECK(found);
GURL target_url(target);
// An empty URL has a special meaning (wildcard), so only accept invalid
// URLs if the original version was empty (avoids treating corrupted prefs
// as the wildcard entry; see http://crbug.com/39685)
if (target_url.is_valid() || target.empty())
(*one_origin_settings)[target_url] = IntToContentSetting(setting);
}
}
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