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// 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/extensions/external_policy_loader.h"
#include "base/logging.h"
#include "base/values.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "googleurl/src/gurl.h"
namespace extensions {
namespace {
// Check an extension ID and an URL to be syntactically correct.
bool CheckExtension(const std::string& id, const std::string& update_url) {
GURL url(update_url);
if (!url.is_valid()) {
LOG(WARNING) << "Policy specifies invalid update URL for external "
<< "extension: " << update_url;
return false;
}
if (!Extension::IdIsValid(id)) {
LOG(WARNING) << "Policy specifies invalid ID for external "
<< "extension: " << id;
return false;
}
return true;
}
} // namespace
ExternalPolicyLoader::ExternalPolicyLoader(Profile* profile)
: profile_(profile) {
pref_change_registrar_.Init(profile_->GetPrefs());
pref_change_registrar_.Add(prefs::kExtensionInstallForceList,
base::Bind(&ExternalPolicyLoader::StartLoading,
base::Unretained(this)));
notification_registrar_.Add(this,
chrome::NOTIFICATION_PROFILE_DESTROYED,
content::Source<Profile>(profile_));
}
void ExternalPolicyLoader::StartLoading() {
const ListValue* forcelist =
profile_->GetPrefs()->GetList(prefs::kExtensionInstallForceList);
DictionaryValue* result = new DictionaryValue();
if (forcelist != NULL) {
std::string extension_desc;
for (ListValue::const_iterator it = forcelist->begin();
it != forcelist->end(); ++it) {
if (!(*it)->GetAsString(&extension_desc)) {
LOG(WARNING) << "Failed to read forcelist string.";
} else {
// Each string item of the list has the following form:
// extension_id_code;extension_update_url
// The update URL might also contain semicolons.
size_t pos = extension_desc.find(';');
std::string id = extension_desc.substr(0, pos);
std::string update_url = extension_desc.substr(pos+1);
if (CheckExtension(id, update_url)) {
result->SetString(id + ".external_update_url", update_url);
}
}
}
}
prefs_.reset(result);
LoadFinished();
}
void ExternalPolicyLoader::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
if (profile_ == NULL) return;
DCHECK(type == chrome::NOTIFICATION_PROFILE_DESTROYED) <<
"Unexpected notification type.";
if (content::Source<Profile>(source).ptr() == profile_) {
notification_registrar_.RemoveAll();
pref_change_registrar_.RemoveAll();
profile_ = NULL;
}
}
} // namespace extensions
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