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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.
//
// Download code which handles CRX files (extensions, themes, apps, ...).
#include "chrome/browser/download/download_crx_util.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/crx_installer.h"
#include "chrome/browser/extensions/extension_install_prompt.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/webstore_installer.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/host_desktop.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "content/public/browser/download_item.h"
#include "content/public/browser/notification_service.h"
#include "extensions/browser/extension_system.h"
#include "extensions/common/user_script.h"
using content::BrowserThread;
using content::DownloadItem;
using extensions::WebstoreInstaller;
namespace download_crx_util {
namespace {
// Hold a mock ExtensionInstallPrompt object that will be used when the
// download system opens a CRX.
ExtensionInstallPrompt* mock_install_prompt_for_testing = NULL;
// Called to get an extension install UI object. In tests, will return
// a mock if the test calls download_util::SetMockInstallPromptForTesting()
// to set one.
scoped_ptr<ExtensionInstallPrompt> CreateExtensionInstallPrompt(
Profile* profile,
const DownloadItem& download_item) {
// Use a mock if one is present. Otherwise, create a real extensions
// install UI.
if (mock_install_prompt_for_testing) {
ExtensionInstallPrompt* result = mock_install_prompt_for_testing;
mock_install_prompt_for_testing = NULL;
return scoped_ptr<ExtensionInstallPrompt>(result);
} else {
content::WebContents* web_contents = download_item.GetWebContents();
if (!web_contents) {
chrome::HostDesktopType active_desktop = chrome::GetActiveDesktop();
Browser* browser = chrome::FindLastActiveWithProfile(profile,
active_desktop);
if (!browser)
browser = new Browser(Browser::CreateParams(Browser::TYPE_TABBED,
profile, active_desktop));
web_contents = browser->tab_strip_model()->GetActiveWebContents();
}
return scoped_ptr<ExtensionInstallPrompt>(
new ExtensionInstallPrompt(web_contents));
}
}
} // namespace
// Tests can call this method to inject a mock ExtensionInstallPrompt
// to be used to confirm permissions on a downloaded CRX.
void SetMockInstallPromptForTesting(
scoped_ptr<ExtensionInstallPrompt> mock_prompt) {
mock_install_prompt_for_testing = mock_prompt.release();
}
scoped_refptr<extensions::CrxInstaller> OpenChromeExtension(
Profile* profile,
const DownloadItem& download_item) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
ExtensionService* service = extensions::ExtensionSystem::Get(profile)->
extension_service();
CHECK(service);
scoped_refptr<extensions::CrxInstaller> installer(
extensions::CrxInstaller::Create(
service,
CreateExtensionInstallPrompt(profile, download_item),
WebstoreInstaller::GetAssociatedApproval(download_item)));
installer->set_error_on_unsupported_requirements(true);
installer->set_delete_source(true);
installer->set_install_cause(extension_misc::INSTALL_CAUSE_USER_DOWNLOAD);
if (OffStoreInstallAllowedByPrefs(profile, download_item)) {
installer->set_off_store_install_allow_reason(
extensions::CrxInstaller::OffStoreInstallAllowedBecausePref);
}
if (extensions::UserScript::IsURLUserScript(download_item.GetURL(),
download_item.GetMimeType())) {
installer->InstallUserScript(download_item.GetFullPath(),
download_item.GetURL());
} else {
bool is_gallery_download =
WebstoreInstaller::GetAssociatedApproval(download_item) != NULL;
installer->set_original_mime_type(download_item.GetOriginalMimeType());
installer->set_apps_require_extension_mime_type(true);
installer->set_download_url(download_item.GetURL());
installer->set_is_gallery_install(is_gallery_download);
if (is_gallery_download)
installer->set_original_download_url(download_item.GetOriginalUrl());
installer->set_allow_silent_install(is_gallery_download);
installer->InstallCrx(download_item.GetFullPath());
}
return installer;
}
bool IsExtensionDownload(const DownloadItem& download_item) {
if (download_item.GetTargetDisposition() ==
DownloadItem::TARGET_DISPOSITION_PROMPT)
return false;
if (download_item.GetMimeType() == extensions::Extension::kMimeType ||
extensions::UserScript::IsURLUserScript(download_item.GetURL(),
download_item.GetMimeType())) {
return true;
} else {
return false;
}
}
bool OffStoreInstallAllowedByPrefs(Profile* profile, const DownloadItem& item) {
ExtensionService* service = extensions::ExtensionSystem::Get(
profile)->extension_service();
if (!service)
return false;
extensions::ExtensionPrefs* prefs = service->extension_prefs();
CHECK(prefs);
extensions::URLPatternSet url_patterns = prefs->GetAllowedInstallSites();
if (!url_patterns.MatchesURL(item.GetURL()))
return false;
// The referrer URL must also be whitelisted, unless the URL has the file
// scheme (there's no referrer for those URLs).
// TODO(aa): RefererURL is cleared in some cases, for example when going
// between secure and non-secure URLs. It would be better if DownloadItem
// tracked the initiating page explicitly.
return url_patterns.MatchesURL(item.GetReferrerUrl()) ||
item.GetURL().SchemeIsFile();
}
} // namespace download_crx_util
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