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// Copyright (c) 2009 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/crx_installer.h"
#include "app/l10n_util.h"
#include "base/file_util.h"
#include "base/scoped_temp_dir.h"
#include "base/string_util.h"
#include "base/task.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/extension_file_util.h"
#include "chrome/common/extensions/extension_error_reporter.h"
#include "grit/chromium_strings.h"
#if defined(OS_WIN)
#include "app/win_util.h"
#elif defined(OS_MACOSX)
#include "base/scoped_cftyperef.h"
#include "base/sys_string_conversions.h"
#include <CoreFoundation/CFUserNotification.h>
#endif
CrxInstaller::CrxInstaller(const FilePath& crx_path,
const FilePath& install_directory,
Extension::Location install_source,
const std::string& expected_id,
bool extensions_enabled,
bool is_from_gallery,
bool show_prompts,
bool delete_crx,
MessageLoop* file_loop,
ExtensionsService* frontend)
: crx_path_(crx_path),
install_directory_(install_directory),
install_source_(install_source),
expected_id_(expected_id),
extensions_enabled_(extensions_enabled),
is_from_gallery_(is_from_gallery),
show_prompts_(show_prompts),
delete_crx_(delete_crx),
file_loop_(file_loop),
ui_loop_(MessageLoop::current()) {
// Note: this is a refptr so that we keep the frontend alive long enough to
// get our response.
frontend_ = frontend;
unpacker_ = new SandboxedExtensionUnpacker(
crx_path, g_browser_process->resource_dispatcher_host(), this);
file_loop->PostTask(FROM_HERE, NewRunnableMethod(unpacker_,
&SandboxedExtensionUnpacker::Start));
}
void CrxInstaller::OnUnpackFailure(const std::string& error_message) {
ReportFailureFromFileThread(error_message);
}
void CrxInstaller::OnUnpackSuccess(const FilePath& temp_dir,
const FilePath& extension_dir,
Extension* extension) {
// Note: We take ownership of |extension| and |temp_dir|.
extension_.reset(extension);
temp_dir_ = temp_dir;
// temp_dir_deleter is stack allocated instead of a member of CrxInstaller, so
// that delete always happens on the file thread.
ScopedTempDir temp_dir_deleter;
temp_dir_deleter.Set(temp_dir);
// The unpack dir we don't have to delete explicity since it is a child of
// the temp dir.
unpacked_extension_root_ = extension_dir;
DCHECK(file_util::ContainsPath(temp_dir_, unpacked_extension_root_));
// If we were supposed to delete the source file, we can do that now.
if (delete_crx_)
file_util::Delete(crx_path_, false); // non-recursive
// Determine whether to allow installation. We always allow themes and
// external installs.
if (!extensions_enabled_ && !extension->IsTheme() &&
!Extension::IsExternalLocation(install_source_)) {
ReportFailureFromFileThread("Extensions are not enabled.");
return;
}
// Make sure the expected id matches.
// TODO(aa): Also support expected version?
if (!expected_id_.empty() && expected_id_ != extension->id()) {
ReportFailureFromFileThread(
StringPrintf("ID in new extension manifest (%s) does not match "
"expected id (%s)",
extension->id().c_str(),
expected_id_.c_str()));
return;
}
// Show the confirm UI if necessary.
// NOTE: We also special case themes to not have a dialog, because we show
// a special infobar UI for them instead.
if (show_prompts_ && !extension->IsTheme()) {
if (!ConfirmInstall())
return; // error reported by ConfirmInstall()
}
CompleteInstall();
}
bool CrxInstaller::ConfirmInstall() {
#if defined(OS_WIN)
if (win_util::MessageBox(GetForegroundWindow(),
L"Are you sure you want to install this extension?\n\n"
L"You should only install extensions from sources you trust.",
l10n_util::GetString(IDS_PRODUCT_NAME).c_str(),
MB_OKCANCEL) != IDOK) {
ReportFailureFromFileThread("User did not allow extension to be "
"installed.");
return false;
}
#elif defined(OS_MACOSX)
// Using CoreFoundation to do this dialog is unimaginably lame but will do
// until the UI is redone.
scoped_cftyperef<CFStringRef> product_name(
base::SysWideToCFStringRef(l10n_util::GetString(IDS_PRODUCT_NAME)));
CFOptionFlags response;
if (kCFUserNotificationAlternateResponse == CFUserNotificationDisplayAlert(
0, kCFUserNotificationCautionAlertLevel, NULL, NULL, NULL,
product_name,
CFSTR("Are you sure you want to install this extension?\n\n"
"This is a temporary message and it will be removed when "
"extensions UI is finalized."),
NULL, CFSTR("Cancel"), NULL, &response)) {
ReportFailureFromFileThread("User did not allow extension to be "
"installed.");
return false;
}
#endif // OS_*
return true;
}
void CrxInstaller::CompleteInstall() {
FilePath version_dir;
Extension::InstallType install_type = Extension::INSTALL_ERROR;
std::string error_msg;
if (!extension_file_util::InstallExtension(unpacked_extension_root_,
install_directory_,
extension_->id(),
extension_->VersionString(),
&version_dir,
&install_type, &error_msg)) {
ReportFailureFromFileThread(error_msg);
return;
}
if (install_type == Extension::DOWNGRADE) {
ReportFailureFromFileThread("Attempted to downgrade extension.");
return;
}
extension_->set_path(version_dir);
extension_->set_location(install_source_);
if (install_type == Extension::REINSTALL) {
// We use this as a signal to switch themes.
ReportOverinstallFromFileThread();
return;
}
ReportSuccessFromFileThread();
}
void CrxInstaller::ReportFailureFromFileThread(const std::string& error) {
ui_loop_->PostTask(FROM_HERE, NewRunnableMethod(this,
&CrxInstaller::ReportFailureFromUIThread, error));
}
void CrxInstaller::ReportFailureFromUIThread(const std::string& error) {
ExtensionErrorReporter::GetInstance()->ReportError(error, show_prompts_);
}
void CrxInstaller::ReportOverinstallFromFileThread() {
ui_loop_->PostTask(FROM_HERE, NewRunnableMethod(frontend_.get(),
&ExtensionsService::OnExtensionOverinstallAttempted, extension_->id()));
}
void CrxInstaller::ReportSuccessFromFileThread() {
// Tell the frontend about the installation and hand off ownership of
// extension_ to it.
ui_loop_->PostTask(FROM_HERE, NewRunnableMethod(frontend_.get(),
&ExtensionsService::OnExtensionInstalled, extension_.release()));
}
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