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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/ui/auto_login_prompter.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/string_split.h"
#include "chrome/browser/google/google_url_tracker.h"
#include "chrome/browser/infobars/infobar_tab_helper.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/signin/signin_manager.h"
#include "chrome/browser/signin/signin_manager_factory.h"
#include "chrome/browser/signin/token_service.h"
#include "chrome/browser/signin/token_service_factory.h"
#include "chrome/browser/sync/profile_sync_service.h"
#include "chrome/browser/sync/profile_sync_service_factory.h"
#include "chrome/browser/tab_contents/tab_util.h"
#include "chrome/browser/ui/auto_login_info_bar_delegate.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/chrome_switches.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_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/web_contents.h"
#include "googleurl/src/gurl.h"
#include "net/base/escape.h"
#include "net/url_request/url_request.h"
using content::BrowserThread;
using content::NavigationController;
using content::WebContents;
namespace {
bool FetchUsernameThroughSigninManager(Profile* profile, std::string* output) {
// In an incognito window, there may not be a profile sync service and/or
// signin manager.
if (!ProfileSyncServiceFactory::GetInstance()->HasProfileSyncService(
profile)) {
return false;
}
if (!TokenServiceFactory::GetForProfile(profile)->AreCredentialsValid())
return false;
SigninManager* signin_manager =
SigninManagerFactory::GetInstance()->GetForProfile(profile);
if (!signin_manager)
return false;
*output = signin_manager->GetAuthenticatedUsername();
return true;
}
} // namespace
AutoLoginPrompter::AutoLoginPrompter(
WebContents* web_contents,
const Params& params)
: web_contents_(web_contents),
params_(params) {
registrar_.Add(this, content::NOTIFICATION_LOAD_STOP,
content::Source<NavigationController>(
&web_contents_->GetController()));
registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
content::Source<WebContents>(web_contents_));
}
AutoLoginPrompter::~AutoLoginPrompter() {
}
// static
void AutoLoginPrompter::ShowInfoBarIfPossible(net::URLRequest* request,
int child_id,
int route_id) {
if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableAutologin))
return;
// See if the response contains the X-Auto-Login header. If so, this was
// a request for a login page, and the server is allowing the browser to
// suggest auto-login, if available.
std::string value;
request->GetResponseHeaderByName("X-Auto-Login", &value);
Params params;
if (!ParseAutoLoginHeader(value, ¶ms))
return;
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&ShowInfoBarUIThread,
params, request->url(), child_id, route_id));
}
// static
bool AutoLoginPrompter::ParseAutoLoginHeader(const std::string& input,
Params* output) {
// TODO(pliard): Investigate/fix potential internationalization issue. It
// seems that "account" from the x-auto-login header might contain non-ASCII
// characters.
if (input.empty())
return false;
std::vector<std::pair<std::string, std::string> > pairs;
if (!base::SplitStringIntoKeyValuePairs(input, '=', '&', &pairs))
return false;
// Parse the information from the |input| string.
Params params;
for (size_t i = 0; i < pairs.size(); ++i) {
const std::pair<std::string, std::string>& pair = pairs[i];
std::string unescaped_value(net::UnescapeURLComponent(
pair.second, net::UnescapeRule::URL_SPECIAL_CHARS));
if (pair.first == "realm") {
// Currently we only accept GAIA credentials.
if (unescaped_value != "com.google")
return false;
params.realm = unescaped_value;
} else if (pair.first == "account") {
params.account = unescaped_value;
} else if (pair.first == "args") {
params.args = unescaped_value;
}
}
if (params.realm.empty() || params.args.empty())
return false;
*output = params;
return true;
}
// static
void AutoLoginPrompter::ShowInfoBarUIThread(Params params,
const GURL& url,
int child_id,
int route_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
WebContents* web_contents = tab_util::GetWebContentsByID(child_id, route_id);
if (!web_contents)
return;
Profile* profile =
Profile::FromBrowserContext(web_contents->GetBrowserContext());
if (!profile->GetPrefs()->GetBoolean(prefs::kAutologinEnabled))
return;
#if !defined(OS_ANDROID)
// On Android, the username is fetched on the Java side from the
// AccountManager provided by the platform.
if (!FetchUsernameThroughSigninManager(profile, ¶ms.username))
return;
#endif
// Make sure that |account|, if specified, matches the logged in user.
// However, |account| is usually empty.
if (!params.username.empty() && !params.account.empty() &&
params.username != params.account)
return;
// We can't add the infobar just yet, since we need to wait for the tab to
// finish loading. If we don't, the info bar appears and then disappears
// immediately. Create an AutoLoginPrompter instance to listen for the
// relevant notifications; it will delete itself.
new AutoLoginPrompter(web_contents, params);
}
void AutoLoginPrompter::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
if (type == content::NOTIFICATION_LOAD_STOP) {
InfoBarTabHelper* infobar_helper =
InfoBarTabHelper::FromWebContents(web_contents_);
// |infobar_helper| is NULL for WebContents hosted in WebDialog.
if (infobar_helper) {
infobar_helper->AddInfoBar(
new AutoLoginInfoBarDelegate(infobar_helper, params_));
}
}
// Either we couldn't add the infobar, we added the infobar, or the tab
// contents was destroyed before the navigation completed. In any case
// there's no reason to live further.
delete this;
}
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