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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.
#include "chrome/browser/extensions/external_policy_extension_provider.h"
#include "base/logging.h"
#include "base/values.h"
#include "chrome/common/pref_names.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/extensions/stateful_external_extension_provider.h"
#include "chrome/browser/prefs/pref_service.h"
namespace {
// Check an extension ID and an URL to be syntactically correct.
bool CheckExtension(std::string id, 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;
}
}
ExternalPolicyExtensionProvider::ExternalPolicyExtensionProvider(
const ListValue* forcelist)
: StatefulExternalExtensionProvider(
Extension::INVALID,
Extension::EXTERNAL_POLICY_DOWNLOAD) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
ProcessPreferences(forcelist);
}
ExternalPolicyExtensionProvider::~ExternalPolicyExtensionProvider() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
}
void ExternalPolicyExtensionProvider::SetPreferences(
const ListValue* forcelist) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
ProcessPreferences(forcelist);
}
void ExternalPolicyExtensionProvider::ProcessPreferences(
const ListValue* forcelist) {
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);
}
}
}
}
set_prefs(result);
}
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