1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chrome/browser/google/google_url_tracker.h"
8 #include "base/command_line.h"
9 #include "base/prefs/pref_service.h"
10 #include "base/strings/string_util.h"
11 #include "chrome/browser/chrome_notification_types.h"
12 #include "chrome/browser/google/google_url_tracker_factory.h"
13 #include "chrome/browser/google/google_url_tracker_infobar_delegate.h"
14 #include "chrome/browser/google/google_url_tracker_navigation_helper.h"
15 #include "chrome/browser/google/google_util.h"
16 #include "chrome/browser/infobars/infobar_service.h"
17 #include "chrome/browser/profiles/profile.h"
18 #include "chrome/common/chrome_switches.h"
19 #include "chrome/common/pref_names.h"
20 #include "content/public/browser/navigation_controller.h"
21 #include "content/public/browser/navigation_entry.h"
22 #include "content/public/browser/notification_service.h"
23 #include "net/base/load_flags.h"
24 #include "net/base/net_util.h"
25 #include "net/url_request/url_fetcher.h"
26 #include "net/url_request/url_request_status.h"
29 const char GoogleURLTracker::kDefaultGoogleHomepage[] =
30 "http://www.google.com/";
31 const char GoogleURLTracker::kSearchDomainCheckURL[] =
32 "https://www.google.com/searchdomaincheck?format=url&type=chrome";
34 GoogleURLTracker::GoogleURLTracker(
36 scoped_ptr<GoogleURLTrackerNavigationHelper> nav_helper,
39 nav_helper_(nav_helper.Pass()),
40 infobar_creator_(base::Bind(&GoogleURLTrackerInfoBarDelegate::Create)),
41 google_url_(mode == UNIT_TEST_MODE ? kDefaultGoogleHomepage :
42 profile->GetPrefs()->GetString(prefs::kLastKnownGoogleURL)),
43 weak_ptr_factory_(this),
45 in_startup_sleep_(true),
46 already_fetched_(false),
47 need_to_fetch_(false),
48 need_to_prompt_(false),
49 search_committed_(false) {
50 net::NetworkChangeNotifier::AddIPAddressObserver(this);
51 nav_helper_->SetGoogleURLTracker(this);
53 // Because this function can be called during startup, when kicking off a URL
54 // fetch can eat up 20 ms of time, we delay five seconds, which is hopefully
55 // long enough to be after startup, but still get results back quickly.
56 // Ideally, instead of this timer, we'd do something like "check if the
57 // browser is starting up, and if so, come back later", but there is currently
58 // no function to do this.
60 // In UNIT_TEST mode, where we want to explicitly control when the tracker
61 // "wakes up", we do nothing at all.
62 if (mode == NORMAL_MODE) {
63 static const int kStartFetchDelayMS = 5000;
64 base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
65 base::Bind(&GoogleURLTracker::FinishSleep,
66 weak_ptr_factory_.GetWeakPtr()),
67 base::TimeDelta::FromMilliseconds(kStartFetchDelayMS));
71 GoogleURLTracker::~GoogleURLTracker() {
72 // We should only reach here after any tabs and their infobars have been torn
74 DCHECK(entry_map_.empty());
78 GURL GoogleURLTracker::GoogleURL(Profile* profile) {
79 const GoogleURLTracker* tracker =
80 GoogleURLTrackerFactory::GetForProfile(profile);
81 return tracker ? tracker->google_url_ : GURL(kDefaultGoogleHomepage);
85 void GoogleURLTracker::RequestServerCheck(Profile* profile, bool force) {
86 GoogleURLTracker* tracker = GoogleURLTrackerFactory::GetForProfile(profile);
87 // If the tracker already has a fetcher, SetNeedToFetch() is unnecessary, and
88 // changing |already_fetched_| is wrong.
89 if (tracker && !tracker->fetcher_) {
91 tracker->already_fetched_ = false;
92 tracker->SetNeedToFetch();
97 void GoogleURLTracker::GoogleURLSearchCommitted(Profile* profile) {
98 GoogleURLTracker* tracker = GoogleURLTrackerFactory::GetForProfile(profile);
100 tracker->SearchCommitted();
103 void GoogleURLTracker::AcceptGoogleURL(bool redo_searches) {
104 UpdatedDetails urls(google_url_, fetched_google_url_);
105 google_url_ = fetched_google_url_;
106 PrefService* prefs = profile_->GetPrefs();
107 prefs->SetString(prefs::kLastKnownGoogleURL, google_url_.spec());
108 prefs->SetString(prefs::kLastPromptedGoogleURL, google_url_.spec());
109 content::NotificationService::current()->Notify(
110 chrome::NOTIFICATION_GOOGLE_URL_UPDATED,
111 content::Source<Profile>(profile_),
112 content::Details<UpdatedDetails>(&urls));
113 need_to_prompt_ = false;
114 CloseAllEntries(redo_searches);
117 void GoogleURLTracker::CancelGoogleURL() {
118 profile_->GetPrefs()->SetString(prefs::kLastPromptedGoogleURL,
119 fetched_google_url_.spec());
120 need_to_prompt_ = false;
121 CloseAllEntries(false);
124 void GoogleURLTracker::OnURLFetchComplete(const net::URLFetcher* source) {
125 // Delete the fetcher on this function's exit.
126 scoped_ptr<net::URLFetcher> clean_up_fetcher(fetcher_.release());
128 // Don't update the URL if the request didn't succeed.
129 if (!source->GetStatus().is_success() || (source->GetResponseCode() != 200)) {
130 already_fetched_ = false;
134 // See if the response data was valid. It should be
135 // "<scheme>://[www.]google.<TLD>/".
137 source->GetResponseAsString(&url_str);
138 TrimWhitespace(url_str, TRIM_ALL, &url_str);
140 if (!url.is_valid() || (url.path().length() > 1) || url.has_query() ||
142 !google_util::IsGoogleDomainUrl(url, google_util::DISALLOW_SUBDOMAIN,
143 google_util::DISALLOW_NON_STANDARD_PORTS))
146 std::swap(url, fetched_google_url_);
147 GURL last_prompted_url(
148 profile_->GetPrefs()->GetString(prefs::kLastPromptedGoogleURL));
150 if (last_prompted_url.is_empty()) {
151 // On the very first run of Chrome, when we've never looked up the URL at
152 // all, we should just silently switch over to whatever we get immediately.
153 AcceptGoogleURL(true); // Arg is irrelevant.
157 string16 fetched_host(net::StripWWWFromHost(fetched_google_url_));
158 if (fetched_google_url_ == google_url_) {
159 // Either the user has continually been on this URL, or we prompted for a
160 // different URL but have now changed back before they responded to any of
161 // the prompts. In this latter case we want to close any infobars and stop
164 } else if (fetched_host == net::StripWWWFromHost(google_url_)) {
165 // Similar to the above case, but this time the new URL differs from the
166 // existing one, probably due to switching between HTTP and HTTPS searching.
167 // Like before we want to close any infobars and stop prompting; we also
168 // want to silently accept the change in scheme. We don't redo open
169 // searches so as to avoid suddenly changing a page the user might be
170 // interacting with; it's enough to simply get future searches right.
171 AcceptGoogleURL(false);
172 } else if (fetched_host == net::StripWWWFromHost(last_prompted_url)) {
173 // We've re-fetched a TLD the user previously turned down. Although the new
174 // URL might have a different scheme than the old, we want to preserve the
175 // user's decision. Note that it's possible that, like in the above two
176 // cases, we fetched yet another different URL in the meantime, which we
177 // have infobars prompting about; in this case, as in those above, we want
178 // to go ahead and close the infobars and stop prompting, since we've
179 // switched back away from that URL.
182 // We've fetched a URL with a different TLD than the user is currently using
183 // or was previously prompted about. This means we need to prompt again.
184 need_to_prompt_ = true;
186 // As in all the above cases, there could be infobars prompting about some
187 // URL. If these URLs have the same TLD (e.g. for scheme changes), we can
188 // simply leave the existing infobars open as their messages will still be
189 // accurate. Otherwise we go ahead and close them because we need to
190 // display a new message.
191 // Note: |url| is the previous |fetched_google_url_|.
192 if (url.is_valid() && (fetched_host != net::StripWWWFromHost(url)))
193 CloseAllEntries(false);
197 void GoogleURLTracker::OnIPAddressChanged() {
198 already_fetched_ = false;
199 StartFetchIfDesirable();
202 void GoogleURLTracker::Shutdown() {
204 weak_ptr_factory_.InvalidateWeakPtrs();
206 net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
209 void GoogleURLTracker::DeleteMapEntryForService(
210 const InfoBarService* infobar_service) {
211 // WARNING: |infobar_service| may point to a deleted object. Do not
212 // dereference it! See OnTabClosed().
213 EntryMap::iterator i(entry_map_.find(infobar_service));
214 DCHECK(i != entry_map_.end());
215 GoogleURLTrackerMapEntry* map_entry = i->second;
217 UnregisterForEntrySpecificNotifications(*map_entry, false);
222 void GoogleURLTracker::SetNeedToFetch() {
223 need_to_fetch_ = true;
224 StartFetchIfDesirable();
227 void GoogleURLTracker::FinishSleep() {
228 in_startup_sleep_ = false;
229 StartFetchIfDesirable();
232 void GoogleURLTracker::StartFetchIfDesirable() {
233 // Bail if a fetch isn't appropriate right now. This function will be called
234 // again each time one of the preconditions changes, so we'll fetch
235 // immediately once all of them are met.
237 // See comments in header on the class, on RequestServerCheck(), and on the
238 // various members here for more detail on exactly what the conditions are.
239 if (in_startup_sleep_ || already_fetched_ || !need_to_fetch_)
242 // Some switches should disable the Google URL tracker entirely. If we can't
243 // do background networking, we can't do the necessary fetch, and if the user
244 // specified a Google base URL manually, we shouldn't bother to look up any
245 // alternatives or offer to switch to them.
246 if (CommandLine::ForCurrentProcess()->HasSwitch(
247 switches::kDisableBackgroundNetworking) ||
248 CommandLine::ForCurrentProcess()->HasSwitch(switches::kGoogleBaseURL))
251 std::string fetch_url = CommandLine::ForCurrentProcess()->
252 GetSwitchValueASCII(switches::kGoogleSearchDomainCheckURL);
253 if (fetch_url.empty())
254 fetch_url = kSearchDomainCheckURL;
256 already_fetched_ = true;
257 fetcher_.reset(net::URLFetcher::Create(fetcher_id_, GURL(fetch_url),
258 net::URLFetcher::GET, this));
260 // We don't want this fetch to set new entries in the cache or cookies, lest
261 // we alarm the user.
262 fetcher_->SetLoadFlags(net::LOAD_DISABLE_CACHE |
263 net::LOAD_DO_NOT_SAVE_COOKIES);
264 fetcher_->SetRequestContext(profile_->GetRequestContext());
266 // Configure to max_retries at most kMaxRetries times for 5xx errors.
267 static const int kMaxRetries = 5;
268 fetcher_->SetMaxRetriesOn5xx(kMaxRetries);
273 void GoogleURLTracker::SearchCommitted() {
274 if (need_to_prompt_) {
275 search_committed_ = true;
276 // These notifications will fire a bit later in the same call chain we're
278 if (!nav_helper_->IsListeningForNavigationStart())
279 nav_helper_->SetListeningForNavigationStart(true);
283 void GoogleURLTracker::OnNavigationPending(
284 content::NavigationController* navigation_controller,
285 InfoBarService* infobar_service,
287 EntryMap::iterator i(entry_map_.find(infobar_service));
289 if (search_committed_) {
290 search_committed_ = false;
291 // Whether there's an existing infobar or not, we need to listen for the
292 // load to commit, so we can show and/or update the infobar when it does.
293 // (We may already be registered for this if there is an existing infobar
294 // that had a previous pending search that hasn't yet committed.)
295 if (!nav_helper_->IsListeningForNavigationCommit(navigation_controller)) {
296 nav_helper_->SetListeningForNavigationCommit(navigation_controller,
299 if (i == entry_map_.end()) {
300 // This is a search on a tab that doesn't have one of our infobars, so
301 // prepare to add one. Note that we only listen for the tab's destruction
302 // on this path; if there was already a map entry, then either it doesn't
303 // yet have an infobar and we're already registered for this, or it has an
304 // infobar and the infobar's owner will handle tearing it down when the
306 nav_helper_->SetListeningForTabDestruction(navigation_controller, true);
307 entry_map_.insert(std::make_pair(
309 new GoogleURLTrackerMapEntry(this, infobar_service,
310 navigation_controller)));
311 } else if (i->second->has_infobar_delegate()) {
312 // This is a new search on a tab where we already have an infobar.
313 i->second->infobar_delegate()->set_pending_id(pending_id);
315 } else if (i != entry_map_.end()){
316 if (i->second->has_infobar_delegate()) {
317 // This is a non-search navigation on a tab with an infobar. If there was
318 // a previous pending search on this tab, this means it won't commit, so
319 // undo anything we did in response to seeing that. Note that if there
320 // was no pending search on this tab, these statements are effectively a
323 // If this navigation actually commits, that will trigger the infobar's
324 // owner to expire the infobar if need be. If it doesn't commit, then
325 // simply leaving the infobar as-is will have been the right thing.
326 UnregisterForEntrySpecificNotifications(*i->second, false);
327 i->second->infobar_delegate()->set_pending_id(0);
329 // Non-search navigation on a tab with an entry that has not yet created
330 // an infobar. This means the original search won't commit, so delete the
332 i->second->Close(false);
335 // Non-search navigation on a tab without an infobars. This is irrelevant
340 void GoogleURLTracker::OnNavigationCommitted(InfoBarService* infobar_service,
341 const GURL& search_url) {
342 EntryMap::iterator i(entry_map_.find(infobar_service));
343 DCHECK(i != entry_map_.end());
344 GoogleURLTrackerMapEntry* map_entry = i->second;
345 DCHECK(search_url.is_valid());
347 UnregisterForEntrySpecificNotifications(*map_entry, true);
348 if (map_entry->has_infobar_delegate()) {
349 map_entry->infobar_delegate()->Update(search_url);
351 GoogleURLTrackerInfoBarDelegate* infobar =
352 infobar_creator_.Run(infobar_service, this, search_url);
354 map_entry->SetInfoBarDelegate(infobar);
356 map_entry->Close(false);
360 void GoogleURLTracker::OnTabClosed(
361 content::NavigationController* navigation_controller) {
362 // Because InfoBarService tears itself down on tab destruction, it's possible
363 // to get a non-NULL InfoBarService pointer here, depending on which order
364 // notifications fired in. Likewise, the pointer in |entry_map_| (and in its
365 // associated MapEntry) may point to deleted memory. Therefore, if we were to
366 // access the InfoBarService* we have for this tab, we'd need to ensure we
367 // just looked at the raw pointer value, and never dereferenced it. This
368 // function doesn't need to do even that, but others in the call chain from
369 // here might (and have comments pointing back here).
370 for (EntryMap::iterator i(entry_map_.begin()); i != entry_map_.end(); ++i) {
371 if (i->second->navigation_controller() == navigation_controller) {
372 i->second->Close(false);
379 void GoogleURLTracker::CloseAllEntries(bool redo_searches) {
380 // Delete all entries, whether they have infobars or not.
381 while (!entry_map_.empty())
382 entry_map_.begin()->second->Close(redo_searches);
385 void GoogleURLTracker::UnregisterForEntrySpecificNotifications(
386 const GoogleURLTrackerMapEntry& map_entry,
387 bool must_be_listening_for_commit) {
388 // For tabs with map entries but no infobars, we should always be listening
389 // for both these notifications. For tabs with infobars, we may be listening
390 // for navigation commits if the user has performed a new search on this tab.
391 if (nav_helper_->IsListeningForNavigationCommit(
392 map_entry.navigation_controller())) {
393 nav_helper_->SetListeningForNavigationCommit(
394 map_entry.navigation_controller(), false);
396 DCHECK(!must_be_listening_for_commit);
397 DCHECK(map_entry.has_infobar_delegate());
399 const bool registered_for_tab_destruction =
400 nav_helper_->IsListeningForTabDestruction(
401 map_entry.navigation_controller());
402 DCHECK_NE(registered_for_tab_destruction, map_entry.has_infobar_delegate());
403 if (registered_for_tab_destruction) {
404 nav_helper_->SetListeningForTabDestruction(
405 map_entry.navigation_controller(), false);
408 // Our global listeners for these other notifications should be in place iff
409 // we have any tabs still listening for commits. These tabs either have no
410 // infobars or have received new pending searches atop existing infobars; in
411 // either case we want to catch subsequent pending non-search navigations.
412 // See the various cases inside OnNavigationPending().
413 for (EntryMap::const_iterator i(entry_map_.begin()); i != entry_map_.end();
415 if (nav_helper_->IsListeningForNavigationCommit(
416 i->second->navigation_controller())) {
417 DCHECK(nav_helper_->IsListeningForNavigationStart());
421 if (nav_helper_->IsListeningForNavigationStart()) {
422 DCHECK(!search_committed_);
423 nav_helper_->SetListeningForNavigationStart(false);