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// Copyright (c) 2011 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/alternate_nav_url_fetcher.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/intranet_redirect_detector.h"
#include "chrome/browser/profiles/profile.h"
#include "content/browser/tab_contents/navigation_controller.h"
#include "content/browser/tab_contents/navigation_entry.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "content/common/notification_service.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "net/base/registry_controlled_domain.h"
#include "net/url_request/url_request.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
AlternateNavURLFetcher::AlternateNavURLFetcher(
const GURL& alternate_nav_url)
: LinkInfoBarDelegate(NULL),
alternate_nav_url_(alternate_nav_url),
controller_(NULL),
state_(NOT_STARTED),
navigated_to_entry_(false),
infobar_contents_(NULL) {
registrar_.Add(this, NotificationType::NAV_ENTRY_PENDING,
NotificationService::AllSources());
}
AlternateNavURLFetcher::~AlternateNavURLFetcher() {}
void AlternateNavURLFetcher::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
switch (type.value) {
case NotificationType::NAV_ENTRY_PENDING:
// If we've already received a notification for the same controller, we
// should delete ourselves as that indicates that the page is being
// re-loaded so this instance is now stale.
// http://crbug.com/43378
if (!infobar_contents_ &&
controller_ == Source<NavigationController>(source).ptr()) {
delete this;
} else if (!controller_) {
controller_ = Source<NavigationController>(source).ptr();
DCHECK(controller_->pending_entry());
// Start listening for the commit notification. We also need to listen
// for the tab close command since that means the load will never
// commit!
registrar_.Add(this, NotificationType::NAV_ENTRY_COMMITTED,
Source<NavigationController>(controller_));
registrar_.Add(this, NotificationType::TAB_CLOSED,
Source<NavigationController>(controller_));
DCHECK_EQ(NOT_STARTED, state_);
state_ = IN_PROGRESS;
fetcher_.reset(new URLFetcher(GURL(alternate_nav_url_),
URLFetcher::HEAD, this));
fetcher_->set_request_context(
controller_->profile()->GetRequestContext());
fetcher_->Start();
}
break;
case NotificationType::NAV_ENTRY_COMMITTED:
// The page was navigated, we can show the infobar now if necessary.
registrar_.Remove(this, NotificationType::NAV_ENTRY_COMMITTED,
Source<NavigationController>(controller_));
navigated_to_entry_ = true;
ShowInfobarIfPossible();
break;
case NotificationType::TAB_CLOSED:
// We have been closed. In order to prevent the URLFetcher from trying to
// access the controller that will be invalid, we delete ourselves.
// This deletes the URLFetcher and insures its callback won't be called.
delete this;
break;
default:
NOTREACHED();
}
}
void AlternateNavURLFetcher::OnURLFetchComplete(
const URLFetcher* source,
const GURL& url,
const net::URLRequestStatus& status,
int response_code,
const ResponseCookies& cookies,
const std::string& data) {
DCHECK_EQ(fetcher_.get(), source);
SetStatusFromURLFetch(url, status, response_code);
ShowInfobarIfPossible();
}
SkBitmap* AlternateNavURLFetcher::GetIcon() const {
return ResourceBundle::GetSharedInstance().GetBitmapNamed(
IDR_INFOBAR_ALT_NAV_URL);
}
InfoBarDelegate::Type AlternateNavURLFetcher::GetInfoBarType() const {
return PAGE_ACTION_TYPE;
}
string16 AlternateNavURLFetcher::GetMessageTextWithOffset(
size_t* link_offset) const {
const string16 label = l10n_util::GetStringFUTF16(
IDS_ALTERNATE_NAV_URL_VIEW_LABEL, string16(), link_offset);
return label;
}
string16 AlternateNavURLFetcher::GetLinkText() const {
return UTF8ToUTF16(alternate_nav_url_.spec());
}
bool AlternateNavURLFetcher::LinkClicked(WindowOpenDisposition disposition) {
infobar_contents_->OpenURL(
alternate_nav_url_, GURL(), disposition,
// Pretend the user typed this URL, so that navigating to
// it will be the default action when it's typed again in
// the future.
PageTransition::TYPED);
// We should always close, even if the navigation did not occur within this
// TabContents.
return true;
}
void AlternateNavURLFetcher::InfoBarClosed() {
delete this;
}
void AlternateNavURLFetcher::SetStatusFromURLFetch(
const GURL& url,
const net::URLRequestStatus& status,
int response_code) {
if (!status.is_success() ||
// HTTP 2xx, 401, and 407 all indicate that the target address exists.
(((response_code / 100) != 2) &&
(response_code != 401) && (response_code != 407)) ||
// Fail if we're redirected to a common location.
// This happens for ISPs/DNS providers/etc. who return
// provider-controlled pages to arbitrary user navigation attempts.
// Because this can result in infobars on large fractions of user
// searches, we don't show automatic infobars for these. Note that users
// can still choose to explicitly navigate to or search for pages in
// these domains, and can still get infobars for cases that wind up on
// other domains (e.g. legit intranet sites), we're just trying to avoid
// erroneously harassing the user with our own UI prompts.
net::RegistryControlledDomainService::SameDomainOrHost(url,
IntranetRedirectDetector::RedirectOrigin())) {
state_ = FAILED;
return;
}
state_ = SUCCEEDED;
}
void AlternateNavURLFetcher::ShowInfobarIfPossible() {
if (!navigated_to_entry_ || state_ != SUCCEEDED) {
if (state_ == FAILED)
delete this;
return;
}
infobar_contents_ = controller_->tab_contents();
StoreActiveEntryUniqueID(infobar_contents_);
infobar_contents_->AddInfoBar(this);
}
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