blob: 8235e056c4f08139b9524993e0a3db65dbe0498b [file] [log] [blame]
// Copyright 2013 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.
/*
* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
* (http://www.torchmobile.com/)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "content/browser/frame_host/navigation_controller_impl.h"
#include <utility>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_number_conversions.h" // Temporary
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "cc/base/switches.h"
#include "content/browser/bad_message.h"
#include "content/browser/blob_storage/chrome_blob_storage_context.h"
#include "content/browser/browser_url_handler_impl.h"
#include "content/browser/dom_storage/dom_storage_context_wrapper.h"
#include "content/browser/dom_storage/session_storage_namespace_impl.h"
#include "content/browser/frame_host/debug_urls.h"
#include "content/browser/frame_host/interstitial_page_impl.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/frame_host/navigation_handle_impl.h"
#include "content/browser/frame_host/navigator.h"
#include "content/browser/renderer_host/render_view_host_impl.h" // Temporary
#include "content/browser/site_instance_impl.h"
#include "content/common/content_constants_internal.h"
#include "content/common/frame_messages.h"
#include "content/common/view_messages.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/invalidate_type.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/replaced_navigation_entry_data.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_features.h"
#include "content/public/common/url_utils.h"
#include "media/base/mime_util.h"
#include "net/base/escape.h"
#include "net/http/http_status_code.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#include "services/metrics/public/cpp/ukm_recorder.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/blink/public/common/blob/blob_utils.h"
#include "third_party/blink/public/common/mime_util/mime_util.h"
#include "url/url_constants.h"
namespace content {
namespace {
// Invoked when entries have been pruned, or removed. For example, if the
// current entries are [google, digg, yahoo], with the current entry google,
// and the user types in cnet, then digg and yahoo are pruned.
void NotifyPrunedEntries(NavigationControllerImpl* nav_controller,
int index,
int count) {
PrunedDetails details;
details.index = index;
details.count = count;
nav_controller->delegate()->NotifyNavigationListPruned(details);
}
// Ensure the given NavigationEntry has a valid state, so that WebKit does not
// get confused if we navigate back to it.
//
// An empty state is treated as a new navigation by WebKit, which would mean
// losing the navigation entries and generating a new navigation entry after
// this one. We don't want that. To avoid this we create a valid state which
// WebKit will not treat as a new navigation.
void SetPageStateIfEmpty(NavigationEntryImpl* entry) {
if (!entry->GetPageState().IsValid())
entry->SetPageState(PageState::CreateFromURL(entry->GetURL()));
}
// Configure all the NavigationEntries in entries for restore. This resets
// the transition type to reload and makes sure the content state isn't empty.
void ConfigureEntriesForRestore(
std::vector<std::unique_ptr<NavigationEntryImpl>>* entries,
RestoreType type) {
for (size_t i = 0; i < entries->size(); ++i) {
// Use a transition type of reload so that we don't incorrectly increase
// the typed count.
(*entries)[i]->SetTransitionType(ui::PAGE_TRANSITION_RELOAD);
(*entries)[i]->set_restore_type(type);
// NOTE(darin): This code is only needed for backwards compat.
SetPageStateIfEmpty((*entries)[i].get());
}
}
// Determines whether or not we should be carrying over a user agent override
// between two NavigationEntries.
bool ShouldKeepOverride(NavigationEntry* last_entry) {
return last_entry && last_entry->GetIsOverridingUserAgent();
}
// Determines whether to override user agent for a navigation.
bool ShouldOverrideUserAgent(
NavigationController::UserAgentOverrideOption override_user_agent,
NavigationEntry* last_committed_entry) {
switch (override_user_agent) {
case NavigationController::UA_OVERRIDE_INHERIT:
return ShouldKeepOverride(last_committed_entry);
case NavigationController::UA_OVERRIDE_TRUE:
return true;
case NavigationController::UA_OVERRIDE_FALSE:
return false;
default:
break;
}
NOTREACHED();
return false;
}
// Returns true this navigation should be treated as a reload. For e.g.
// navigating to the last committed url via the address bar or clicking on a
// link which results in a navigation to the last committed or pending
// navigation, etc.
// |url|, |virtual_url|, |base_url_for_data_url|, |transition_type| correspond
// to the new navigation (i.e. the pending NavigationEntry).
// |last_committed_entry| is the last navigation that committed.
bool ShouldTreatNavigationAsReload(const GURL& url,
const GURL& virtual_url,
const GURL& base_url_for_data_url,
ui::PageTransition transition_type,
bool is_main_frame,
bool is_post,
bool is_reload,
bool is_navigation_to_existing_entry,
bool has_interstitial,
NavigationEntryImpl* last_committed_entry) {
// Don't convert when an interstitial is showing.
if (has_interstitial)
return false;
// Only convert main frame navigations to a new entry.
if (!is_main_frame || is_reload || is_navigation_to_existing_entry)
return false;
// Only convert to reload if at least one navigation committed.
if (!last_committed_entry)
return false;
// Skip navigations initiated by external applications.
if (transition_type & ui::PAGE_TRANSITION_FROM_API)
return false;
// We treat (PAGE_TRANSITION_RELOAD | PAGE_TRANSITION_FROM_ADDRESS_BAR),
// PAGE_TRANSITION_TYPED or PAGE_TRANSITION_LINK transitions as navigations
// which should be treated as reloads.
bool transition_type_can_be_converted = false;
if (ui::PageTransitionCoreTypeIs(transition_type,
ui::PAGE_TRANSITION_RELOAD) &&
(transition_type & ui::PAGE_TRANSITION_FROM_ADDRESS_BAR)) {
transition_type_can_be_converted = true;
}
if (ui::PageTransitionCoreTypeIs(transition_type,
ui::PAGE_TRANSITION_TYPED)) {
transition_type_can_be_converted = true;
}
if (ui::PageTransitionCoreTypeIs(transition_type, ui::PAGE_TRANSITION_LINK))
transition_type_can_be_converted = true;
if (!transition_type_can_be_converted)
return false;
// This check is required for cases like view-source:, etc. Here the URL of
// the navigation entry would contain the url of the page, while the virtual
// URL contains the full URL including the view-source prefix.
if (virtual_url != last_committed_entry->GetVirtualURL())
return false;
// Check that the URL match.
if (url != last_committed_entry->GetURL())
return false;
// This check is required for Android WebView loadDataWithBaseURL. Apps
// can pass in anything in the base URL and we need to ensure that these
// match before classifying it as a reload.
if (url.SchemeIs(url::kDataScheme) && base_url_for_data_url.is_valid()) {
if (base_url_for_data_url != last_committed_entry->GetBaseURLForDataURL())
return false;
}
// Skip entries with SSL errors.
if (last_committed_entry->ssl_error())
return false;
// Don't convert to a reload when the last navigation was a POST or the new
// navigation is a POST.
if (last_committed_entry->GetHasPostData() || is_post)
return false;
return true;
}
bool DoesURLMatchOriginForNavigation(
const GURL& url,
const base::Optional<url::Origin>& origin) {
// If there is no origin supplied there is nothing to match. This can happen
// for navigations to a pending entry and therefore it should be allowed.
if (!origin)
return true;
return origin->CanBeDerivedFrom(url);
}
base::Optional<url::Origin> GetCommittedOriginForFrameEntry(
const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
// Error pages commit in an opaque origin, yet have the real URL that resulted
// in an error as the |params.url|. Since successful reload of an error page
// should commit in the correct origin, setting the opaque origin on the
// FrameNavigationEntry will be incorrect.
if (params.url_is_unreachable)
return base::nullopt;
return base::make_optional(params.origin);
}
bool IsValidURLForNavigation(bool is_main_frame,
const GURL& virtual_url,
const GURL& dest_url) {
// Don't attempt to navigate if the virtual URL is non-empty and invalid.
if (is_main_frame && !virtual_url.is_valid() && !virtual_url.is_empty()) {
LOG(WARNING) << "Refusing to load for invalid virtual URL: "
<< virtual_url.possibly_invalid_spec();
return false;
}
// Don't attempt to navigate to non-empty invalid URLs.
if (!dest_url.is_valid() && !dest_url.is_empty()) {
LOG(WARNING) << "Refusing to load invalid URL: "
<< dest_url.possibly_invalid_spec();
return false;
}
// The renderer will reject IPC messages with URLs longer than
// this limit, so don't attempt to navigate with a longer URL.
if (dest_url.spec().size() > url::kMaxURLChars) {
LOG(WARNING) << "Refusing to load URL as it exceeds " << url::kMaxURLChars
<< " characters.";
return false;
}
return true;
}
// See replaced_navigation_entry_data.h for details: this information is meant
// to ensure |*output_entry| keeps track of its original URL (landing page in
// case of server redirects) as it gets replaced (e.g. history.replaceState()),
// without overwriting it later, for main frames.
void CopyReplacedNavigationEntryDataIfPreviouslyEmpty(
NavigationEntryImpl* replaced_entry,
NavigationEntryImpl* output_entry) {
if (output_entry->GetReplacedEntryData().has_value())
return;
ReplacedNavigationEntryData data;
data.first_committed_url = replaced_entry->GetURL();
data.first_timestamp = replaced_entry->GetTimestamp();
data.first_transition_type = replaced_entry->GetTransitionType();
output_entry->set_replaced_entry_data(data);
}
mojom::NavigationType GetNavigationType(const GURL& old_url,
const GURL& new_url,
ReloadType reload_type,
NavigationEntryImpl* entry,
const FrameNavigationEntry& frame_entry,
bool is_same_document_history_load) {
// Reload navigations
switch (reload_type) {
case ReloadType::NORMAL:
return mojom::NavigationType::RELOAD;
case ReloadType::BYPASSING_CACHE:
return mojom::NavigationType::RELOAD_BYPASSING_CACHE;
case ReloadType::ORIGINAL_REQUEST_URL:
return mojom::NavigationType::RELOAD_ORIGINAL_REQUEST_URL;
case ReloadType::NONE:
break; // Fall through to rest of function.
}
if (entry->restore_type() == RestoreType::LAST_SESSION_EXITED_CLEANLY) {
if (entry->GetHasPostData())
return mojom::NavigationType::RESTORE_WITH_POST;
else
return mojom::NavigationType::RESTORE;
}
// History navigations.
if (frame_entry.page_state().IsValid()) {
if (is_same_document_history_load)
return mojom::NavigationType::HISTORY_SAME_DOCUMENT;
else
return mojom::NavigationType::HISTORY_DIFFERENT_DOCUMENT;
}
DCHECK(!is_same_document_history_load);
// A same-document fragment-navigation happens when the only part of the url
// that is modified is after the '#' character.
//
// When modifying this condition, please take a look at:
// FrameLoader::shouldPerformFragmentNavigation.
//
// Note: this check is only valid for navigations that are not history
// navigations. For instance, if the history is: 'A#bar' -> 'B' -> 'A#foo', a
// history navigation from 'A#foo' to 'A#bar' is not a same-document
// navigation, but a different-document one. This is why history navigation
// are classified before this check.
if (new_url.has_ref() && old_url.EqualsIgnoringRef(new_url) &&
frame_entry.method() == "GET") {
return mojom::NavigationType::SAME_DOCUMENT;
} else {
return mojom::NavigationType::DIFFERENT_DOCUMENT;
}
}
// Adjusts the original input URL if needed, to get the URL to actually load and
// the virtual URL, which may differ.
void RewriteUrlForNavigation(const GURL& original_url,
BrowserContext* browser_context,
GURL* url_to_load,
GURL* virtual_url,
bool* reverse_on_redirect) {
// Fix up the given URL before letting it be rewritten, so that any minor
// cleanup (e.g., removing leading dots) will not lead to a virtual URL.
*virtual_url = original_url;
BrowserURLHandlerImpl::GetInstance()->FixupURLBeforeRewrite(virtual_url,
browser_context);
// Allow the browser URL handler to rewrite the URL. This will, for example,
// remove "view-source:" from the beginning of the URL to get the URL that
// will actually be loaded. This real URL won't be shown to the user, just
// used internally.
*url_to_load = *virtual_url;
BrowserURLHandlerImpl::GetInstance()->RewriteURLIfNecessary(
url_to_load, browser_context, reverse_on_redirect);
}
#if DCHECK_IS_ON()
// Helper sanity check function used in debug mode.
void ValidateRequestMatchesEntry(NavigationRequest* request,
NavigationEntryImpl* entry) {
if (request->frame_tree_node()->IsMainFrame()) {
DCHECK_EQ(request->browser_initiated(), !entry->is_renderer_initiated());
DCHECK(ui::PageTransitionTypeIncludingQualifiersIs(
request->common_params().transition, entry->GetTransitionType()));
}
DCHECK_EQ(request->common_params().should_replace_current_entry,
entry->should_replace_entry());
DCHECK_EQ(request->commit_params().should_clear_history_list,
entry->should_clear_history_list());
DCHECK_EQ(request->common_params().has_user_gesture,
entry->has_user_gesture());
DCHECK_EQ(request->common_params().base_url_for_data_url,
entry->GetBaseURLForDataURL());
DCHECK_EQ(request->commit_params().can_load_local_resources,
entry->GetCanLoadLocalResources());
DCHECK_EQ(request->common_params().started_from_context_menu,
entry->has_started_from_context_menu());
FrameNavigationEntry* frame_entry =
entry->GetFrameEntry(request->frame_tree_node());
if (!frame_entry) {
NOTREACHED();
return;
}
DCHECK_EQ(request->common_params().url, frame_entry->url());
DCHECK_EQ(request->common_params().method, frame_entry->method());
size_t redirect_size = request->commit_params().redirects.size();
if (redirect_size == frame_entry->redirect_chain().size()) {
for (size_t i = 0; i < redirect_size; ++i) {
DCHECK_EQ(request->commit_params().redirects[i],
frame_entry->redirect_chain()[i]);
}
} else {
NOTREACHED();
}
}
#endif // DCHECK_IS_ON()
// Returns whether the session history NavigationRequests in |navigations|
// would stay within the subtree of the sandboxed iframe in
// |sandbox_frame_tree_node_id|.
bool DoesSandboxNavigationStayWithinSubtree(
int sandbox_frame_tree_node_id,
const std::vector<std::unique_ptr<NavigationRequest>>& navigations) {
for (auto& item : navigations) {
bool within_subtree = false;
// Check whether this NavigationRequest affects a frame within the
// sandboxed frame's subtree by walking up the tree looking for the
// sandboxed frame.
for (auto* frame = item->frame_tree_node(); frame;
frame = frame->parent()) {
if (frame->frame_tree_node_id() == sandbox_frame_tree_node_id) {
within_subtree = true;
break;
}
}
if (!within_subtree)
return false;
}
return true;
}
} // namespace
// NavigationControllerImpl ----------------------------------------------------
const size_t kMaxEntryCountForTestingNotSet = static_cast<size_t>(-1);
// static
size_t NavigationControllerImpl::max_entry_count_for_testing_ =
kMaxEntryCountForTestingNotSet;
// Should Reload check for post data? The default is true, but is set to false
// when testing.
static bool g_check_for_repost = true;
// static
std::unique_ptr<NavigationEntry> NavigationController::CreateNavigationEntry(
const GURL& url,
const Referrer& referrer,
const base::Optional<url::Origin>& initiator_origin,
ui::PageTransition transition,
bool is_renderer_initiated,
const std::string& extra_headers,
BrowserContext* browser_context,
scoped_refptr<network::SharedURLLoaderFactory> blob_url_loader_factory) {
GURL url_to_load;
GURL virtual_url;
bool reverse_on_redirect = false;
RewriteUrlForNavigation(url, browser_context, &url_to_load, &virtual_url,
&reverse_on_redirect);
auto entry = std::make_unique<NavigationEntryImpl>(
nullptr, // The site instance for tabs is sent on navigation
// (WebContents::GetSiteInstance).
url_to_load, referrer, initiator_origin, base::string16(), transition,
is_renderer_initiated, blob_url_loader_factory);
entry->SetVirtualURL(virtual_url);
entry->set_user_typed_url(virtual_url);
entry->set_update_virtual_url_with_url(reverse_on_redirect);
entry->set_extra_headers(extra_headers);
return entry;
}
// static
void NavigationController::DisablePromptOnRepost() {
g_check_for_repost = false;
}
base::Time NavigationControllerImpl::TimeSmoother::GetSmoothedTime(
base::Time t) {
// If |t| is between the water marks, we're in a run of duplicates
// or just getting out of it, so increase the high-water mark to get
// a time that probably hasn't been used before and return it.
if (low_water_mark_ <= t && t <= high_water_mark_) {
high_water_mark_ += base::TimeDelta::FromMicroseconds(1);
return high_water_mark_;
}
// Otherwise, we're clear of the last duplicate run, so reset the
// water marks.
low_water_mark_ = high_water_mark_ = t;
return t;
}
NavigationControllerImpl::NavigationControllerImpl(
NavigationControllerDelegate* delegate,
BrowserContext* browser_context)
: browser_context_(browser_context),
pending_entry_(nullptr),
failed_pending_entry_id_(0),
last_committed_entry_index_(-1),
pending_entry_index_(-1),
transient_entry_index_(-1),
delegate_(delegate),
ssl_manager_(this),
needs_reload_(false),
is_initial_navigation_(true),
in_navigate_to_pending_entry_(false),
pending_reload_(ReloadType::NONE),
get_timestamp_callback_(base::Bind(&base::Time::Now)) {
DCHECK(browser_context_);
}
NavigationControllerImpl::~NavigationControllerImpl() {
DiscardNonCommittedEntriesInternal();
}
WebContents* NavigationControllerImpl::GetWebContents() {
return delegate_->GetWebContents();
}
BrowserContext* NavigationControllerImpl::GetBrowserContext() {
return browser_context_;
}
void NavigationControllerImpl::Restore(
int selected_navigation,
RestoreType type,
std::vector<std::unique_ptr<NavigationEntry>>* entries) {
// Verify that this controller is unused and that the input is valid.
DCHECK(GetEntryCount() == 0 && !GetPendingEntry());
DCHECK(selected_navigation >= 0 &&
selected_navigation < static_cast<int>(entries->size()));
DCHECK_EQ(-1, pending_entry_index_);
needs_reload_ = true;
needs_reload_type_ = NeedsReloadType::kRestoreSession;
entries_.reserve(entries->size());
for (auto& entry : *entries)
entries_.push_back(
NavigationEntryImpl::FromNavigationEntry(std::move(entry)));
// At this point, the |entries| is full of empty scoped_ptrs, so it can be
// cleared out safely.
entries->clear();
// And finish the restore.
FinishRestore(selected_navigation, type);
}
void NavigationControllerImpl::Reload(ReloadType reload_type,
bool check_for_repost) {
DCHECK_NE(ReloadType::NONE, reload_type);
if (transient_entry_index_ != -1) {
// If an interstitial is showing, treat a reload as a navigation to the
// transient entry's URL.
NavigationEntryImpl* transient_entry = GetTransientEntry();
if (!transient_entry)
return;
LoadURL(transient_entry->GetURL(),
Referrer(),
ui::PAGE_TRANSITION_RELOAD,
transient_entry->extra_headers());
return;
}
NavigationEntryImpl* entry = nullptr;
int current_index = -1;
// If we are reloading the initial navigation, just use the current
// pending entry. Otherwise look up the current entry.
if (IsInitialNavigation() && pending_entry_) {
entry = pending_entry_;
// The pending entry might be in entries_ (e.g., after a Clone), so we
// should also update the current_index.
current_index = pending_entry_index_;
} else {
DiscardNonCommittedEntriesInternal();
current_index = GetCurrentEntryIndex();
if (current_index != -1) {
entry = GetEntryAtIndex(current_index);
}
}
// If we are no where, then we can't reload. TODO(darin): We should add a
// CanReload method.
if (!entry)
return;
// Set ReloadType for |entry|.
entry->set_reload_type(reload_type);
if (g_check_for_repost && check_for_repost &&
entry->GetHasPostData()) {
// The user is asking to reload a page with POST data. Prompt to make sure
// they really want to do this. If they do, the dialog will call us back
// with check_for_repost = false.
delegate_->NotifyBeforeFormRepostWarningShow();
pending_reload_ = reload_type;
delegate_->ActivateAndShowRepostFormWarningDialog();
} else {
if (!IsInitialNavigation())
DiscardNonCommittedEntriesInternal();
pending_entry_ = entry;
pending_entry_index_ = current_index;
pending_entry_->SetTransitionType(ui::PAGE_TRANSITION_RELOAD);
NavigateToExistingPendingEntry(reload_type,
FrameTreeNode::kFrameTreeNodeInvalidId);
}
}
void NavigationControllerImpl::CancelPendingReload() {
DCHECK(pending_reload_ != ReloadType::NONE);
pending_reload_ = ReloadType::NONE;
}
void NavigationControllerImpl::ContinuePendingReload() {
if (pending_reload_ == ReloadType::NONE) {
NOTREACHED();
} else {
Reload(pending_reload_, false);
pending_reload_ = ReloadType::NONE;
}
}
bool NavigationControllerImpl::IsInitialNavigation() {
return is_initial_navigation_;
}
bool NavigationControllerImpl::IsInitialBlankNavigation() {
// TODO(creis): Once we create a NavigationEntry for the initial blank page,
// we'll need to check for entry count 1 and restore_type NONE (to exclude
// the cloned tab case).
return IsInitialNavigation() && GetEntryCount() == 0;
}
NavigationEntryImpl*
NavigationControllerImpl::GetEntryWithUniqueID(int nav_entry_id) const {
int index = GetEntryIndexWithUniqueID(nav_entry_id);
return (index != -1) ? entries_[index].get() : nullptr;
}
void NavigationControllerImpl::SetPendingEntry(
std::unique_ptr<NavigationEntryImpl> entry) {
DiscardNonCommittedEntriesInternal();
pending_entry_ = entry.release();
DCHECK_EQ(-1, pending_entry_index_);
NotificationService::current()->Notify(
NOTIFICATION_NAV_ENTRY_PENDING,
Source<NavigationController>(this),
Details<NavigationEntry>(pending_entry_));
}
NavigationEntryImpl* NavigationControllerImpl::GetActiveEntry() {
if (transient_entry_index_ != -1)
return entries_[transient_entry_index_].get();
if (pending_entry_)
return pending_entry_;
return GetLastCommittedEntry();
}
NavigationEntryImpl* NavigationControllerImpl::GetVisibleEntry() {
if (transient_entry_index_ != -1)
return entries_[transient_entry_index_].get();
// The pending entry is safe to return for new (non-history), browser-
// initiated navigations. Most renderer-initiated navigations should not
// show the pending entry, to prevent URL spoof attacks.
//
// We make an exception for renderer-initiated navigations in new tabs, as
// long as no other page has tried to access the initial empty document in
// the new tab. If another page modifies this blank page, a URL spoof is
// possible, so we must stop showing the pending entry.
bool safe_to_show_pending =
pending_entry_ &&
// Require a new navigation.
pending_entry_index_ == -1 &&
// Require either browser-initiated or an unmodified new tab.
(!pending_entry_->is_renderer_initiated() || IsUnmodifiedBlankTab());
// Also allow showing the pending entry for history navigations in a new tab,
// such as Ctrl+Back. In this case, no existing page is visible and no one
// can script the new tab before it commits.
if (!safe_to_show_pending &&
pending_entry_ &&
pending_entry_index_ != -1 &&
IsInitialNavigation() &&
!pending_entry_->is_renderer_initiated())
safe_to_show_pending = true;
if (safe_to_show_pending)
return pending_entry_;
return GetLastCommittedEntry();
}
int NavigationControllerImpl::GetCurrentEntryIndex() {
if (transient_entry_index_ != -1)
return transient_entry_index_;
if (pending_entry_index_ != -1)
return pending_entry_index_;
return last_committed_entry_index_;
}
NavigationEntryImpl* NavigationControllerImpl::GetLastCommittedEntry() {
if (last_committed_entry_index_ == -1)
return nullptr;
return entries_[last_committed_entry_index_].get();
}
bool NavigationControllerImpl::CanViewSource() {
const std::string& mime_type = delegate_->GetContentsMimeType();
bool is_viewable_mime_type = blink::IsSupportedNonImageMimeType(mime_type) &&
!media::IsSupportedMediaMimeType(mime_type);
NavigationEntry* visible_entry = GetVisibleEntry();
return visible_entry && !visible_entry->IsViewSourceMode() &&
is_viewable_mime_type && !delegate_->GetInterstitialPage();
}
int NavigationControllerImpl::GetLastCommittedEntryIndex() {
// The last committed entry index must always be less than the number of
// entries. If there are no entries, it must be -1. However, there may be a
// transient entry while the last committed entry index is still -1.
DCHECK_LT(last_committed_entry_index_, GetEntryCount());
DCHECK(GetEntryCount() || last_committed_entry_index_ == -1);
return last_committed_entry_index_;
}
int NavigationControllerImpl::GetEntryCount() {
DCHECK_LE(entries_.size(),
max_entry_count() + (transient_entry_index_ == -1 ? 0 : 1));
return static_cast<int>(entries_.size());
}
NavigationEntryImpl* NavigationControllerImpl::GetEntryAtIndex(int index) {
if (index < 0 || index >= GetEntryCount())
return nullptr;
return entries_[index].get();
}
NavigationEntryImpl* NavigationControllerImpl::GetEntryAtOffset(int offset) {
return GetEntryAtIndex(GetIndexForOffset(offset));
}
int NavigationControllerImpl::GetIndexForOffset(int offset) {
return GetCurrentEntryIndex() + offset;
}
bool NavigationControllerImpl::CanGoBack() {
if (!base::FeatureList::IsEnabled(features::kHistoryManipulationIntervention))
return CanGoToOffset(-1);
for (int index = GetIndexForOffset(-1); index >= 0; index--) {
if (!GetEntryAtIndex(index)->should_skip_on_back_forward_ui())
return true;
}
return false;
}
bool NavigationControllerImpl::CanGoForward() {
return CanGoToOffset(1);
}
bool NavigationControllerImpl::CanGoToOffset(int offset) {
int index = GetIndexForOffset(offset);
return index >= 0 && index < GetEntryCount();
}
void NavigationControllerImpl::GoBack() {
int target_index = GetIndexForOffset(-1);
// Log metrics for the number of entries that are eligible for skipping on
// back button and move the target index past the skippable entries, if
// history intervention is enabled.
int count_entries_skipped = 0;
bool all_skippable_entries = true;
bool history_intervention_enabled = base::FeatureList::IsEnabled(
features::kHistoryManipulationIntervention);
for (int index = target_index; index >= 0; index--) {
if (GetEntryAtIndex(index)->should_skip_on_back_forward_ui()) {
count_entries_skipped++;
} else {
if (history_intervention_enabled)
target_index = index;
all_skippable_entries = false;
break;
}
}
UMA_HISTOGRAM_ENUMERATION("Navigation.BackForward.BackTargetSkipped",
count_entries_skipped, kMaxSessionHistoryEntries);
UMA_HISTOGRAM_BOOLEAN("Navigation.BackForward.AllBackTargetsSkippable",
all_skippable_entries);
// Do nothing if all entries are skippable. Normally this path would not
// happen as consumers would have already checked it in CanGoBack but a lot of
// tests do not do that.
if (history_intervention_enabled && all_skippable_entries)
return;
GoToIndex(target_index);
}
void NavigationControllerImpl::GoForward() {
int target_index = GetIndexForOffset(1);
// Log metrics for the number of entries that are eligible for skipping on
// forward button and move the target index past the skippable entries, if
// history intervention is enabled.
// Note that at least one entry (the last one) will be non-skippable since
// entries are marked skippable only when they add another entry because of
// redirect or pushState.
int count_entries_skipped = 0;
bool history_intervention_enabled = base::FeatureList::IsEnabled(
features::kHistoryManipulationIntervention);
for (size_t index = target_index; index < entries_.size(); index++) {
if (GetEntryAtIndex(index)->should_skip_on_back_forward_ui()) {
count_entries_skipped++;
} else {
if (history_intervention_enabled)
target_index = index;
break;
}
}
UMA_HISTOGRAM_ENUMERATION("Navigation.BackForward.ForwardTargetSkipped",
count_entries_skipped, kMaxSessionHistoryEntries);
GoToIndex(target_index);
}
void NavigationControllerImpl::GoToIndex(int index) {
GoToIndex(index, FrameTreeNode::kFrameTreeNodeInvalidId);
}
void NavigationControllerImpl::GoToIndex(int index,
int sandbox_frame_tree_node_id) {
TRACE_EVENT0("browser,navigation,benchmark",
"NavigationControllerImpl::GoToIndex");
if (index < 0 || index >= static_cast<int>(entries_.size())) {
NOTREACHED();
return;
}
if (transient_entry_index_ != -1) {
if (index == transient_entry_index_) {
// Nothing to do when navigating to the transient.
return;
}
if (index > transient_entry_index_) {
// Removing the transient is goint to shift all entries by 1.
index--;
}
}
DiscardNonCommittedEntries();
DCHECK_EQ(nullptr, pending_entry_);
DCHECK_EQ(-1, pending_entry_index_);
pending_entry_ = entries_[index].get();
pending_entry_index_ = index;
pending_entry_->SetTransitionType(ui::PageTransitionFromInt(
pending_entry_->GetTransitionType() | ui::PAGE_TRANSITION_FORWARD_BACK));
NavigateToExistingPendingEntry(ReloadType::NONE, sandbox_frame_tree_node_id);
}
void NavigationControllerImpl::GoToOffset(int offset) {
// Note: This is actually reached in unit tests.
if (!CanGoToOffset(offset))
return;
GoToIndex(GetIndexForOffset(offset));
}
bool NavigationControllerImpl::RemoveEntryAtIndex(int index) {
if (index == last_committed_entry_index_ ||
index == pending_entry_index_)
return false;
RemoveEntryAtIndexInternal(index);
return true;
}
void NavigationControllerImpl::UpdateVirtualURLToURL(
NavigationEntryImpl* entry, const GURL& new_url) {
GURL new_virtual_url(new_url);
if (BrowserURLHandlerImpl::GetInstance()->ReverseURLRewrite(
&new_virtual_url, entry->GetVirtualURL(), browser_context_)) {
entry->SetVirtualURL(new_virtual_url);
}
}
void NavigationControllerImpl::LoadURL(
const GURL& url,
const Referrer& referrer,
ui::PageTransition transition,
const std::string& extra_headers) {
LoadURLParams params(url);
params.referrer = referrer;
params.transition_type = transition;
params.extra_headers = extra_headers;
LoadURLWithParams(params);
}
void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) {
if (params.is_renderer_initiated)
DCHECK(params.initiator_origin.has_value());
TRACE_EVENT1("browser,navigation",
"NavigationControllerImpl::LoadURLWithParams",
"url", params.url.possibly_invalid_spec());
bool is_explicit_navigation =
GetContentClient()->browser()->IsExplicitNavigation(
params.transition_type);
if (HandleDebugURL(params.url, params.transition_type,
is_explicit_navigation)) {
// If Telemetry is running, allow the URL load to proceed as if it's
// unhandled, otherwise Telemetry can't tell if Navigation completed.
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
cc::switches::kEnableGpuBenchmarking))
return;
}
// Checks based on params.load_type.
switch (params.load_type) {
case LOAD_TYPE_DEFAULT:
case LOAD_TYPE_HTTP_POST:
break;
case LOAD_TYPE_DATA:
if (!params.url.SchemeIs(url::kDataScheme)) {
NOTREACHED() << "Data load must use data scheme.";
return;
}
break;
default:
NOTREACHED();
break;
}
// The user initiated a load, we don't need to reload anymore.
needs_reload_ = false;
NavigateWithoutEntry(params);
}
bool NavigationControllerImpl::PendingEntryMatchesHandle(
NavigationHandleImpl* handle) const {
return pending_entry_ &&
pending_entry_->GetUniqueID() == handle->pending_nav_entry_id();
}
bool NavigationControllerImpl::RendererDidNavigate(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
LoadCommittedDetails* details,
bool is_same_document_navigation,
bool previous_document_was_activated,
NavigationRequest* navigation_request) {
DCHECK(navigation_request);
is_initial_navigation_ = false;
// Save the previous state before we clobber it.
bool overriding_user_agent_changed = false;
if (GetLastCommittedEntry()) {
details->previous_url = GetLastCommittedEntry()->GetURL();
details->previous_entry_index = GetLastCommittedEntryIndex();
if (pending_entry_ &&
pending_entry_->GetIsOverridingUserAgent() !=
GetLastCommittedEntry()->GetIsOverridingUserAgent())
overriding_user_agent_changed = true;
} else {
details->previous_url = GURL();
details->previous_entry_index = -1;
}
// TODO(altimin, crbug.com/933147): Remove this logic after we are done with
// implementing back-forward cache.
// Create a new metrics object or reuse the previous one depending on whether
// it's a main frame navigation or not.
scoped_refptr<BackForwardCacheMetrics> back_forward_cache_metrics =
BackForwardCacheMetrics::CreateOrReuseBackForwardCacheMetrics(
GetLastCommittedEntry(), !rfh->GetParent(),
params.document_sequence_number);
// Notify the last active entry that we have navigated away.
if (!rfh->GetParent() && !is_same_document_navigation) {
if (NavigationEntryImpl* navigation_entry = GetLastCommittedEntry()) {
if (auto* metrics = navigation_entry->back_forward_cache_metrics()) {
metrics->MainFrameDidNavigateAwayFromDocument();
}
}
}
// If there is a pending entry at this point, it should have a SiteInstance,
// except for restored entries.
bool was_restored = false;
DCHECK(pending_entry_index_ == -1 || pending_entry_->site_instance() ||
pending_entry_->restore_type() != RestoreType::NONE);
if (pending_entry_ && pending_entry_->restore_type() != RestoreType::NONE) {
pending_entry_->set_restore_type(RestoreType::NONE);
was_restored = true;
}
// If this is a navigation to a matching pending_entry_ and the SiteInstance
// has changed, this must be treated as a new navigation with replacement.
// Set the replacement bit here and ClassifyNavigation will identify this
// case and return NEW_PAGE.
if (!rfh->GetParent() && pending_entry_ &&
pending_entry_->GetUniqueID() == params.nav_entry_id &&
pending_entry_->site_instance() &&
pending_entry_->site_instance() != rfh->GetSiteInstance()) {
DCHECK_NE(-1, pending_entry_index_);
// TODO(nasko,creis): Instead of setting this value here, set
// should_replace_current_entry on the parameters we send to the
// renderer process as part of CommitNavigation. The renderer should
// in turn send it back here as part of |params| and it can be just
// enforced and renderer process terminated on mismatch.
details->did_replace_entry = true;
} else {
// The renderer tells us whether the navigation replaces the current entry.
details->did_replace_entry = params.should_replace_current_entry;
}
// Do navigation-type specific actions. These will make and commit an entry.
details->type = ClassifyNavigation(rfh, params);
// is_same_document must be computed before the entry gets committed.
details->is_same_document = is_same_document_navigation;
// Make sure we do not discard the pending entry for a different ongoing
// navigation when a same document commit comes in unexpectedly from the
// renderer. Limit this to a very narrow set of conditions to avoid risks to
// other navigation types. See https://crbug.com/900036.
// TODO(crbug.com/926009): Handle history.pushState() as well.
NavigationHandleImpl* navigation_handle =
navigation_request->navigation_handle();
bool keep_pending_entry = is_same_document_navigation &&
details->type == NAVIGATION_TYPE_EXISTING_PAGE &&
pending_entry_ &&
!PendingEntryMatchesHandle(navigation_handle);
switch (details->type) {
case NAVIGATION_TYPE_NEW_PAGE:
RendererDidNavigateToNewPage(
rfh, params, details->is_same_document, details->did_replace_entry,
previous_document_was_activated, navigation_handle);
break;
case NAVIGATION_TYPE_EXISTING_PAGE:
RendererDidNavigateToExistingPage(rfh, params, details->is_same_document,
was_restored, navigation_handle,
keep_pending_entry);
break;
case NAVIGATION_TYPE_SAME_PAGE:
RendererDidNavigateToSamePage(rfh, params, details->is_same_document,
navigation_handle);
break;
case NAVIGATION_TYPE_NEW_SUBFRAME:
RendererDidNavigateNewSubframe(
rfh, params, details->is_same_document, details->did_replace_entry,
previous_document_was_activated, navigation_handle);
break;
case NAVIGATION_TYPE_AUTO_SUBFRAME:
if (!RendererDidNavigateAutoSubframe(rfh, params, navigation_handle)) {
// We don't send a notification about auto-subframe PageState during
// UpdateStateForFrame, since it looks like nothing has changed. Send
// it here at commit time instead.
NotifyEntryChanged(GetLastCommittedEntry());
return false;
}
break;
case NAVIGATION_TYPE_NAV_IGNORE:
// If a pending navigation was in progress, this canceled it. We should
// discard it and make sure it is removed from the URL bar. After that,
// there is nothing we can do with this navigation, so we just return to
// the caller that nothing has happened.
if (pending_entry_) {
DiscardNonCommittedEntries();
delegate_->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
}
return false;
default:
NOTREACHED();
}
// At this point, we know that the navigation has just completed, so
// record the time.
//
// TODO(akalin): Use "sane time" as described in
// https://www.chromium.org/developers/design-documents/sane-time .
base::Time timestamp =
time_smoother_.GetSmoothedTime(get_timestamp_callback_.Run());
DVLOG(1) << "Navigation finished at (smoothed) timestamp "
<< timestamp.ToInternalValue();
// If we aren't keeping the pending entry, there shouldn't be one at this
// point. Clear it again in case any error cases above forgot to do so.
// TODO(pbos): Consider a CHECK here that verifies that the pending entry has
// been cleared instead of protecting against it.
if (!keep_pending_entry)
DiscardNonCommittedEntriesInternal();
// All committed entries should have nonempty content state so WebKit doesn't
// get confused when we go back to them (see the function for details).
DCHECK(params.page_state.IsValid()) << "Shouldn't see an empty PageState.";
NavigationEntryImpl* active_entry = GetLastCommittedEntry();
active_entry->SetTimestamp(timestamp);
active_entry->SetHttpStatusCode(params.http_status_code);
// TODO(altimin, crbug.com/933147): Remove this logic after we are done with
// implementing back-forward cache.
if (!active_entry->back_forward_cache_metrics()) {
active_entry->set_back_forward_cache_metrics(
std::move(back_forward_cache_metrics));
}
active_entry->back_forward_cache_metrics()->DidCommitNavigation(
navigation_request->navigation_handle()->GetNavigationId(),
active_entry->GetUniqueID(), rfh->frame_tree_node()->IsMainFrame());
// Grab the corresponding FrameNavigationEntry for a few updates, but only if
// the SiteInstance matches (to avoid updating the wrong entry by mistake).
// A mismatch can occur if the renderer lies or due to a unique name collision
// after a race with an OOPIF (see https://crbug.com/616820).
FrameNavigationEntry* frame_entry =
active_entry->GetFrameEntry(rfh->frame_tree_node());
if (frame_entry && frame_entry->site_instance() != rfh->GetSiteInstance())
frame_entry = nullptr;
// Make sure we've updated the PageState in one of the helper methods.
// TODO(creis): Remove the "if" once https://crbug.com/522193 is fixed.
if (frame_entry) {
DCHECK(params.page_state == frame_entry->page_state());
}
// Once it is committed, we no longer need to track several pieces of state on
// the entry.
active_entry->ResetForCommit(frame_entry);
// It is possible that we are re-using this entry and it was marked to be
// skipped on back/forward UI in its previous navigation. Reset it here so
// that it is set afresh, if applicable, for this navigation.
active_entry->set_should_skip_on_back_forward_ui(false);
// The active entry's SiteInstance should match our SiteInstance.
// TODO(creis): This check won't pass for subframes until we create entries
// for subframe navigations.
if (!rfh->GetParent())
CHECK_EQ(active_entry->site_instance(), rfh->GetSiteInstance());
// Remember the bindings the renderer process has at this point, so that
// we do not grant this entry additional bindings if we come back to it.
active_entry->SetBindings(rfh->GetEnabledBindings());
// Now prep the rest of the details for the notification and broadcast.
details->entry = active_entry;
details->is_main_frame = !rfh->GetParent();
details->http_status_code = params.http_status_code;
NotifyNavigationEntryCommitted(details);
if (active_entry->GetURL().SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
navigation_handle->GetNetErrorCode() == net::OK) {
UMA_HISTOGRAM_BOOLEAN("Navigation.SecureSchemeHasSSLStatus",
!!active_entry->GetSSL().certificate);
}
if (overriding_user_agent_changed)
delegate_->UpdateOverridingUserAgent();
// Update the nav_entry_id for each RenderFrameHost in the tree, so that each
// one knows the latest NavigationEntry it is showing (whether it has
// committed anything in this navigation or not). This allows things like
// state and title updates from RenderFrames to apply to the latest relevant
// NavigationEntry.
int nav_entry_id = active_entry->GetUniqueID();
for (FrameTreeNode* node : delegate_->GetFrameTree()->Nodes())
node->current_frame_host()->set_nav_entry_id(nav_entry_id);
return true;
}
NavigationType NavigationControllerImpl::ClassifyNavigation(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
if (params.did_create_new_entry) {
// A new entry. We may or may not have a pending entry for the page, and
// this may or may not be the main frame.
if (!rfh->GetParent()) {
return NAVIGATION_TYPE_NEW_PAGE;
}
// When this is a new subframe navigation, we should have a committed page
// in which it's a subframe. This may not be the case when an iframe is
// navigated on a popup navigated to about:blank (the iframe would be
// written into the popup by script on the main page). For these cases,
// there isn't any navigation stuff we can do, so just ignore it.
if (!GetLastCommittedEntry())
return NAVIGATION_TYPE_NAV_IGNORE;
// Valid subframe navigation.
return NAVIGATION_TYPE_NEW_SUBFRAME;
}
// We only clear the session history when navigating to a new page.
DCHECK(!params.history_list_was_cleared);
if (rfh->GetParent()) {
// All manual subframes would be did_create_new_entry and handled above, so
// we know this is auto.
if (GetLastCommittedEntry()) {
return NAVIGATION_TYPE_AUTO_SUBFRAME;
} else {
// We ignore subframes created in non-committed pages; we'd appreciate if
// people stopped doing that.
return NAVIGATION_TYPE_NAV_IGNORE;
}
}
if (params.nav_entry_id == 0) {
// This is a renderer-initiated navigation (nav_entry_id == 0), but didn't
// create a new page.
// Just like above in the did_create_new_entry case, it's possible to
// scribble onto an uncommitted page. Again, there isn't any navigation
// stuff that we can do, so ignore it here as well.
NavigationEntry* last_committed = GetLastCommittedEntry();
if (!last_committed)
return NAVIGATION_TYPE_NAV_IGNORE;
// This is history.replaceState() or history.reload().
// TODO(nasko): With error page isolation, reloading an existing session
// history entry can result in change of SiteInstance. Check for such a case
// here and classify it as NEW_PAGE, as such navigations should be treated
// as new with replacement.
return NAVIGATION_TYPE_EXISTING_PAGE;
}
if (pending_entry_ && pending_entry_->GetUniqueID() == params.nav_entry_id) {
// If the SiteInstance of the |pending_entry_| does not match the
// SiteInstance that got committed, treat this as a new navigation with
// replacement. This can happen if back/forward/reload encounters a server
// redirect to a different site or an isolated error page gets successfully
// reloaded into a different SiteInstance.
if (pending_entry_->site_instance() &&
pending_entry_->site_instance() != rfh->GetSiteInstance()) {
return NAVIGATION_TYPE_NEW_PAGE;
}
if (pending_entry_index_ == -1) {
// In this case, we have a pending entry for a load of a new URL but Blink
// didn't do a new navigation (params.did_create_new_entry). First check
// to make sure Blink didn't treat a new cross-process navigation as
// inert, and thus set params.did_create_new_entry to false. In that case,
// we must treat it as NEW since the SiteInstance doesn't match the entry.
if (!GetLastCommittedEntry() ||
GetLastCommittedEntry()->site_instance() != rfh->GetSiteInstance()) {
return NAVIGATION_TYPE_NEW_PAGE;
}
// Otherwise, this happens when you press enter in the URL bar to reload.
// We will create a pending entry, but Blink will convert it to a reload
// since it's the same page and not create a new entry for it (the user
// doesn't want to have a new back/forward entry when they do this).
// Therefore we want to just ignore the pending entry and go back to where
// we were (the "existing entry").
// TODO(creis,avi): Eliminate SAME_PAGE in https://crbug.com/536102.
return NAVIGATION_TYPE_SAME_PAGE;
}
}
// Everything below here is assumed to be an existing entry, but if there is
// no last committed entry, we must consider it a new navigation instead.
if (!GetLastCommittedEntry())
return NAVIGATION_TYPE_NEW_PAGE;
if (params.intended_as_new_entry) {
// This was intended to be a navigation to a new entry but the pending entry
// got cleared in the meanwhile. Classify as EXISTING_PAGE because we may or
// may not have a pending entry.
return NAVIGATION_TYPE_EXISTING_PAGE;
}
if (params.url_is_unreachable && failed_pending_entry_id_ != 0 &&
params.nav_entry_id == failed_pending_entry_id_) {
// If the renderer was going to a new pending entry that got cleared because
// of an error, this is the case of the user trying to retry a failed load
// by pressing return. Classify as EXISTING_PAGE because we probably don't
// have a pending entry.
return NAVIGATION_TYPE_EXISTING_PAGE;
}
// Now we know that the notification is for an existing page. Find that entry.
int existing_entry_index = GetEntryIndexWithUniqueID(params.nav_entry_id);
if (existing_entry_index == -1) {
// The renderer has committed a navigation to an entry that no longer
// exists. Because the renderer is showing that page, resurrect that entry.
return NAVIGATION_TYPE_NEW_PAGE;
}
// Since we weeded out "new" navigations above, we know this is an existing
// (back/forward) navigation.
return NAVIGATION_TYPE_EXISTING_PAGE;
}
void NavigationControllerImpl::RendererDidNavigateToNewPage(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
bool is_same_document,
bool replace_entry,
bool previous_document_was_activated,
NavigationHandleImpl* handle) {
std::unique_ptr<NavigationEntryImpl> new_entry;
bool update_virtual_url = false;
const base::Optional<url::Origin>& initiator_origin =
handle->navigation_request()->common_params().initiator_origin;
// First check if this is an in-page navigation. If so, clone the current
// entry instead of looking at the pending entry, because the pending entry
// does not have any subframe history items.
if (is_same_document && GetLastCommittedEntry()) {
auto frame_entry = base::MakeRefCounted<FrameNavigationEntry>(
rfh->frame_tree_node()->unique_name(), params.item_sequence_number,
params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
params.url, (params.url_is_unreachable) ? nullptr : &params.origin,
params.referrer, initiator_origin, params.redirects, params.page_state,
params.method, params.post_id, nullptr /* blob_url_loader_factory */);
new_entry = GetLastCommittedEntry()->CloneAndReplace(
frame_entry, true, rfh->frame_tree_node(),
delegate_->GetFrameTree()->root());
if (new_entry->GetURL().GetOrigin() != params.url.GetOrigin()) {
// TODO(jam): we had one report of this with a URL that was redirecting to
// only tildes. Until we understand that better, don't copy the cert in
// this case.
new_entry->GetSSL() = SSLStatus();
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus.NewPageInPageOriginMismatch",
!!new_entry->GetSSL().certificate);
}
}
// It is expected that |frame_entry| is now owned by |new_entry|. This means
// that |frame_entry| should now have a reference count of exactly 2: one
// due to the local variable |frame_entry|, and another due to |new_entry|
// also retaining one. This should never fail, because it's the main frame.
CHECK(!frame_entry->HasOneRef() && frame_entry->HasAtLeastOneRef());
update_virtual_url = new_entry->update_virtual_url_with_url();
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
UMA_HISTOGRAM_BOOLEAN("Navigation.SecureSchemeHasSSLStatus.NewPageInPage",
!!new_entry->GetSSL().certificate);
}
}
// Only make a copy of the pending entry if it is appropriate for the new page
// that was just loaded. Verify this by checking if the entry corresponds
// to the given navigation handle. Additionally, coarsely check that:
// 1. The SiteInstance hasn't been assigned to something else.
// 2. The pending entry was intended as a new entry, rather than being a
// history navigation that was interrupted by an unrelated,
// renderer-initiated navigation.
// TODO(csharrison): Investigate whether we can remove some of the coarser
// checks.
if (!new_entry &&
PendingEntryMatchesHandle(handle) && pending_entry_index_ == -1 &&
(!pending_entry_->site_instance() ||
pending_entry_->site_instance() == rfh->GetSiteInstance())) {
new_entry = pending_entry_->Clone();
update_virtual_url = new_entry->update_virtual_url_with_url();
new_entry->GetSSL() =
SSLStatus(handle->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus.NewPagePendingEntryMatches",
!!new_entry->GetSSL().certificate);
}
}
// For non-in-page commits with no matching pending entry, create a new entry.
if (!new_entry) {
new_entry = std::make_unique<NavigationEntryImpl>(
rfh->GetSiteInstance(), params.url, params.referrer, initiator_origin,
base::string16(), // title
params.transition, handle->IsRendererInitiated(),
nullptr); // blob_url_loader_factory
// Find out whether the new entry needs to update its virtual URL on URL
// change and set up the entry accordingly. This is needed to correctly
// update the virtual URL when replaceState is called after a pushState.
GURL url = params.url;
bool needs_update = false;
BrowserURLHandlerImpl::GetInstance()->RewriteURLIfNecessary(
&url, browser_context_, &needs_update);
new_entry->set_update_virtual_url_with_url(needs_update);
// When navigating to a new page, give the browser URL handler a chance to
// update the virtual URL based on the new URL. For example, this is needed
// to show chrome://bookmarks/#1 when the bookmarks webui extension changes
// the URL.
update_virtual_url = needs_update;
new_entry->GetSSL() =
SSLStatus(handle->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus.NewPageNoMatchingEntry",
!!new_entry->GetSSL().certificate);
}
}
// Don't use the page type from the pending entry. Some interstitial page
// may have set the type to interstitial. Once we commit, however, the page
// type must always be normal or error.
new_entry->set_page_type(params.url_is_unreachable ? PAGE_TYPE_ERROR
: PAGE_TYPE_NORMAL);
new_entry->SetURL(params.url);
if (update_virtual_url)
UpdateVirtualURLToURL(new_entry.get(), params.url);
new_entry->SetReferrer(params.referrer);
new_entry->SetTransitionType(params.transition);
new_entry->set_site_instance(
static_cast<SiteInstanceImpl*>(rfh->GetSiteInstance()));
new_entry->SetOriginalRequestURL(params.original_request_url);
new_entry->SetIsOverridingUserAgent(params.is_overriding_user_agent);
// Update the FrameNavigationEntry for new main frame commits.
FrameNavigationEntry* frame_entry =
new_entry->GetFrameEntry(rfh->frame_tree_node());
frame_entry->set_frame_unique_name(rfh->frame_tree_node()->unique_name());
frame_entry->set_item_sequence_number(params.item_sequence_number);
frame_entry->set_document_sequence_number(params.document_sequence_number);
frame_entry->set_redirect_chain(params.redirects);
frame_entry->SetPageState(params.page_state);
frame_entry->set_method(params.method);
frame_entry->set_post_id(params.post_id);
if (!params.url_is_unreachable)
frame_entry->set_committed_origin(params.origin);
// history.pushState() is classified as a navigation to a new page, but sets
// is_same_document to true. In this case, we already have the title and
// favicon available, so set them immediately.
if (is_same_document && GetLastCommittedEntry()) {
new_entry->SetTitle(GetLastCommittedEntry()->GetTitle());
new_entry->GetFavicon() = GetLastCommittedEntry()->GetFavicon();
}
DCHECK(!params.history_list_was_cleared || !replace_entry);
// The browser requested to clear the session history when it initiated the
// navigation. Now we know that the renderer has updated its state accordingly
// and it is safe to also clear the browser side history.
if (params.history_list_was_cleared) {
DiscardNonCommittedEntriesInternal();
entries_.clear();
last_committed_entry_index_ = -1;
}
// If this is a new navigation with replacement and there is a
// pending_entry_ which matches the navigation reported by the renderer
// process, then it should be the one replaced, so update the
// last_committed_entry_index_ to use it.
if (replace_entry && pending_entry_index_ != -1 &&
pending_entry_->GetUniqueID() == params.nav_entry_id) {
last_committed_entry_index_ = pending_entry_index_;
}
SetShouldSkipOnBackForwardUIIfNeeded(rfh, replace_entry,
previous_document_was_activated,
handle->IsRendererInitiated());
InsertOrReplaceEntry(std::move(new_entry), replace_entry);
}
void NavigationControllerImpl::RendererDidNavigateToExistingPage(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
bool is_same_document,
bool was_restored,
NavigationHandleImpl* handle,
bool keep_pending_entry) {
DCHECK(GetLastCommittedEntry()) << "ClassifyNavigation should guarantee "
<< "that a last committed entry exists.";
// We should only get here for main frame navigations.
DCHECK(!rfh->GetParent());
NavigationEntryImpl* entry;
if (params.intended_as_new_entry) {
// This was intended as a new entry but the pending entry was lost in the
// meanwhile and no new page was created. We are stuck at the last committed
// entry.
entry = GetLastCommittedEntry();
// If this is a same document navigation, then there's no SSLStatus in the
// NavigationHandle so don't overwrite the existing entry's SSLStatus.
if (!is_same_document)
entry->GetSSL() =
SSLStatus(handle->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
bool has_cert = !!entry->GetSSL().certificate;
if (is_same_document) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageSameDocumentIntendedAsNew",
has_cert);
} else {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageDifferentDocumentIntendedAsNew",
has_cert);
}
}
} else if (params.nav_entry_id) {
// This is a browser-initiated navigation (back/forward/reload).
entry = GetEntryWithUniqueID(params.nav_entry_id);
if (is_same_document) {
// There's no SSLStatus in the NavigationHandle for same document
// navigations, so normally we leave |entry|'s SSLStatus as is. However if
// this was a restored same document navigation entry, then it won't have
// an SSLStatus. So we need to copy over the SSLStatus from the entry that
// navigated it.
NavigationEntryImpl* last_entry = GetLastCommittedEntry();
if (entry->GetURL().GetOrigin() == last_entry->GetURL().GetOrigin() &&
last_entry->GetSSL().initialized && !entry->GetSSL().initialized &&
was_restored) {
entry->GetSSL() = last_entry->GetSSL();
}
} else {
// In rapid back/forward navigations |handle| sometimes won't have a cert
// (http://crbug.com/727892). So we use the handle's cert if it exists,
// otherwise we only reuse the existing cert if the origins match.
if (handle->GetSSLInfo().has_value() &&
handle->GetSSLInfo()->is_valid()) {
entry->GetSSL() = SSLStatus(*(handle->GetSSLInfo()));
} else if (entry->GetURL().GetOrigin() != handle->GetURL().GetOrigin()) {
entry->GetSSL() = SSLStatus();
}
}
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
bool has_cert = !!entry->GetSSL().certificate;
if (is_same_document && was_restored) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageSameDocumentRestoredBrowserInitiated",
has_cert);
} else if (is_same_document && !was_restored) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageSameDocumentBrowserInitiated",
has_cert);
} else if (!is_same_document && was_restored) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageRestoredBrowserInitiated",
has_cert);
} else {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus.ExistingPageBrowserInitiated",
has_cert);
}
}
} else {
// This is renderer-initiated. The only kinds of renderer-initated
// navigations that are EXISTING_PAGE are reloads and history.replaceState,
// which land us at the last committed entry.
entry = GetLastCommittedEntry();
// TODO(crbug.com/751023): Set page transition type to PAGE_TRANSITION_LINK
// to avoid misleading interpretations (e.g. URLs paired with
// PAGE_TRANSITION_TYPED that haven't actually been typed) as well as to fix
// the inconsistency with what we report to observers (PAGE_TRANSITION_LINK
// | PAGE_TRANSITION_CLIENT_REDIRECT).
CopyReplacedNavigationEntryDataIfPreviouslyEmpty(entry, entry);
// If this is a same document navigation, then there's no SSLStatus in the
// NavigationHandle so don't overwrite the existing entry's SSLStatus.
if (!is_same_document)
entry->GetSSL() =
SSLStatus(handle->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
handle->GetNetErrorCode() == net::OK) {
bool has_cert = !!entry->GetSSL().certificate;
if (is_same_document) {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageSameDocumentRendererInitiated",
has_cert);
} else {
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SecureSchemeHasSSLStatus."
"ExistingPageDifferentDocumentRendererInitiated",
has_cert);
}
}
}
DCHECK(entry);
// The URL may have changed due to redirects.
entry->set_page_type(params.url_is_unreachable ? PAGE_TYPE_ERROR
: PAGE_TYPE_NORMAL);
entry->SetURL(params.url);
entry->SetReferrer(params.referrer);
if (entry->update_virtual_url_with_url())
UpdateVirtualURLToURL(entry, params.url);
// The site instance will normally be the same except
// 1) session restore, when no site instance will be assigned or
// 2) redirect, when the site instance is reset.
DCHECK(entry->site_instance() == nullptr ||
!entry->GetRedirectChain().empty() ||
entry->site_instance() == rfh->GetSiteInstance());
// Update the existing FrameNavigationEntry to ensure all of its members
// reflect the parameters coming from the renderer process.
const base::Optional<url::Origin>& initiator_origin =
handle->navigation_request()->common_params().initiator_origin;
entry->AddOrUpdateFrameEntry(
rfh->frame_tree_node(), params.item_sequence_number,
params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
params.url, GetCommittedOriginForFrameEntry(params), params.referrer,
initiator_origin, params.redirects, params.page_state, params.method,
params.post_id, nullptr /* blob_url_loader_factory */);
// The redirected to page should not inherit the favicon from the previous
// page.
if (ui::PageTransitionIsRedirect(params.transition) && !is_same_document)
entry->GetFavicon() = FaviconStatus();
// We should also usually discard the pending entry if it corresponds to a
// different navigation, since that one is now likely canceled. In rare
// cases, we leave the pending entry for another navigation in place when we
// know it is still ongoing, to avoid a flicker in the omnibox (see
// https://crbug.com/900036).
//
// Note that we need to use the "internal" version since we don't want to
// actually change any other state, just kill the pointer.
if (!keep_pending_entry)
DiscardNonCommittedEntriesInternal();
// If a transient entry was removed, the indices might have changed, so we
// have to query the entry index again.
last_committed_entry_index_ = GetIndexOfEntry(entry);
}
void NavigationControllerImpl::RendererDidNavigateToSamePage(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
bool is_same_document,
NavigationHandleImpl* handle) {
// This classification says that we have a pending entry that's the same as
// the last committed entry. This entry is guaranteed to exist by
// ClassifyNavigation. All we need to do is update the existing entry.
NavigationEntryImpl* existing_entry = GetLastCommittedEntry();
// If we classified this correctly, the SiteInstance should not have changed.
CHECK_EQ(existing_entry->site_instance(), rfh->GetSiteInstance());
// We assign the entry's unique ID to be that of the new one. Since this is
// always the result of a user action, we want to dismiss infobars, etc. like
// a regular user-initiated navigation.
DCHECK_EQ(pending_entry_->GetUniqueID(), params.nav_entry_id);
existing_entry->set_unique_id(pending_entry_->GetUniqueID());
// The URL may have changed due to redirects.
existing_entry->set_page_type(params.url_is_unreachable ? PAGE_TYPE_ERROR
: PAGE_TYPE_NORMAL);
if (existing_entry->update_virtual_url_with_url())
UpdateVirtualURLToURL(existing_entry, params.url);
existing_entry->SetURL(params.url);
// If a user presses enter in the omnibox and the server redirects, the URL
// might change (but it's still considered a SAME_PAGE navigation), so we must
// update the SSL status if we perform a network request (e.g. a
// non-same-document navigation). Requests that don't result in a network
// request do not have a valid SSL status, but since the document didn't
// change, the previous SSLStatus is still valid.
if (!is_same_document)
existing_entry->GetSSL() =
SSLStatus(handle->GetSSLInfo().value_or(net::SSLInfo()));
if (existing_entry->GetURL().SchemeIs(url::kHttpsScheme) &&
!rfh->GetParent() && handle->GetNetErrorCode() == net::OK) {
UMA_HISTOGRAM_BOOLEAN("Navigation.SecureSchemeHasSSLStatus.SamePage",
!!existing_entry->GetSSL().certificate);
}
// The extra headers may have changed due to reloading with different headers.
existing_entry->set_extra_headers(pending_entry_->extra_headers());
// Update the existing FrameNavigationEntry to ensure all of its members
// reflect the parameters coming from the renderer process.
const base::Optional<url::Origin>& initiator_origin =
handle->navigation_request()->common_params().initiator_origin;
existing_entry->AddOrUpdateFrameEntry(
rfh->frame_tree_node(), params.item_sequence_number,
params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
params.url, GetCommittedOriginForFrameEntry(params), params.referrer,
initiator_origin, params.redirects, params.page_state, params.method,
params.post_id, nullptr /* blob_url_loader_factory */);
DiscardNonCommittedEntries();
}
void NavigationControllerImpl::RendererDidNavigateNewSubframe(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
bool is_same_document,
bool replace_entry,
bool previous_document_was_activated,
NavigationHandleImpl* handle) {
DCHECK(ui::PageTransitionCoreTypeIs(params.transition,
ui::PAGE_TRANSITION_MANUAL_SUBFRAME));
// Manual subframe navigations just get the current entry cloned so the user
// can go back or forward to it. The actual subframe information will be
// stored in the page state for each of those entries. This happens out of
// band with the actual navigations.
DCHECK(GetLastCommittedEntry()) << "ClassifyNavigation should guarantee "
<< "that a last committed entry exists.";
// The DCHECK below documents the fact that we don't know of any situation
// where |replace_entry| is true for subframe navigations. This simplifies
// reasoning about the replacement struct for subframes (see
// CopyReplacedNavigationEntryDataIfPreviouslyEmpty()).
DCHECK(!replace_entry);
// This FrameNavigationEntry might not end up being used in the
// CloneAndReplace() call below, if a spot can't be found for it in the tree.
const base::Optional<url::Origin>& initiator_origin =
handle->navigation_request()->common_params().initiator_origin;
auto frame_entry = base::MakeRefCounted<FrameNavigationEntry>(
rfh->frame_tree_node()->unique_name(), params.item_sequence_number,
params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
params.url, (params.url_is_unreachable) ? nullptr : &params.origin,
params.referrer, initiator_origin, params.redirects, params.page_state,
params.method, params.post_id, nullptr /* blob_url_loader_factory */);
std::unique_ptr<NavigationEntryImpl> new_entry =
GetLastCommittedEntry()->CloneAndReplace(
std::move(frame_entry), is_same_document, rfh->frame_tree_node(),
delegate_->GetFrameTree()->root());
SetShouldSkipOnBackForwardUIIfNeeded(rfh, replace_entry,
previous_document_was_activated,
handle->IsRendererInitiated());
// TODO(creis): Update this to add the frame_entry if we can't find the one
// to replace, which can happen due to a unique name change. See
// https://crbug.com/607205. For now, the call to CloneAndReplace() will
// delete the |frame_entry| when the function exits if it doesn't get used.
InsertOrReplaceEntry(std::move(new_entry), replace_entry);
}
bool NavigationControllerImpl::RendererDidNavigateAutoSubframe(
RenderFrameHostImpl* rfh,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
NavigationHandleImpl* handle) {
DCHECK(ui::PageTransitionCoreTypeIs(params.transition,
ui::PAGE_TRANSITION_AUTO_SUBFRAME));
// We're guaranteed to have a previously committed entry, and we now need to
// handle navigation inside of a subframe in it without creating a new entry.
DCHECK(GetLastCommittedEntry());
// For newly created subframes, we don't need to send a commit notification.
// This is only necessary for history navigations in subframes.
bool send_commit_notification = false;
// If the |nav_entry_id| is non-zero and matches an existing entry, this is
// a history navigation. Update the last committed index accordingly.
// If we don't recognize the |nav_entry_id|, it might be a recently pruned
// entry. We'll handle it below.
if (params.nav_entry_id) {
int entry_index = GetEntryIndexWithUniqueID(params.nav_entry_id);
if (entry_index != -1 && entry_index != last_committed_entry_index_) {
// Make sure that a subframe commit isn't changing the main frame's
// origin. Otherwise the renderer process may be confused, leading to a
// URL spoof. We can't check the path since that may change
// (https://crbug.com/373041).
// TODO(creis): For now, restrict this check to HTTP(S) origins, because
// about:blank, file, and unique origins are more subtle to get right.
// We'll abstract out the relevant checks from IsURLSameDocumentNavigation
// and share them here. See https://crbug.com/618104.
const GURL& dest_top_url = GetEntryAtIndex(entry_index)->GetURL();
const GURL& current_top_url = GetLastCommittedEntry()->GetURL();
if (current_top_url.SchemeIsHTTPOrHTTPS() &&
dest_top_url.SchemeIsHTTPOrHTTPS() &&
current_top_url.GetOrigin() != dest_top_url.GetOrigin()) {
bad_message::ReceivedBadMessage(rfh->GetProcess(),
bad_message::NC_AUTO_SUBFRAME);
}
// We only need to discard the pending entry in this history navigation
// case. For newly created subframes, there was no pending entry.
last_committed_entry_index_ = entry_index;
DiscardNonCommittedEntriesInternal();
// History navigations should send a commit notification.
send_commit_notification = true;
}
}
// This may be a "new auto" case where we add a new FrameNavigationEntry, or
// it may be a "history auto" case where we update an existing one.
NavigationEntryImpl* last_committed = GetLastCommittedEntry();
const base::Optional<url::Origin>& initiator_origin =
handle->navigation_request()->common_params().initiator_origin;
last_committed->AddOrUpdateFrameEntry(
rfh->frame_tree_node(), params.item_sequence_number,
params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
params.url, GetCommittedOriginForFrameEntry(params), params.referrer,
initiator_origin, params.redirects, params.page_state, params.method,
params.post_id, nullptr /* blob_url_loader_factory */);
return send_commit_notification;
}
int NavigationControllerImpl::GetIndexOfEntry(
const NavigationEntryImpl* entry) const {
for (size_t i = 0; i < entries_.size(); ++i) {
if (entries_[i].get() == entry)
return i;
}
return -1;
}
// There are two general cases where a navigation is "same-document":
// 1. A fragment navigation, in which the url is kept the same except for the
// reference fragment.
// 2. A history API navigation (pushState and replaceState). This case is
// always same-document, but the urls are not guaranteed to match excluding
// the fragment. The relevant spec allows pushState/replaceState to any URL
// on the same origin.
// However, due to reloads, even identical urls are *not* guaranteed to be
// same-document navigations, we have to trust the renderer almost entirely.
// The one thing we do know is that cross-origin navigations will *never* be
// same-document. Therefore, trust the renderer if the URLs are on the same
// origin, and assume the renderer is malicious if a cross-origin navigation
// claims to be same-document.
//
// TODO(creis): Clean up and simplify the about:blank and origin checks below,
// which are likely redundant with each other. Be careful about data URLs vs
// about:blank, both of which are unique origins and thus not considered equal.
bool NavigationControllerImpl::IsURLSameDocumentNavigation(
const GURL& url,
const url::Origin& origin,
bool renderer_says_same_document,
RenderFrameHost* rfh) {
RenderFrameHostImpl* rfhi = static_cast<RenderFrameHostImpl*>(rfh);
GURL last_committed_url;
if (rfh->GetParent()) {
// Use the FrameTreeNode's current_url and not rfh->GetLastCommittedURL(),
// which might be empty in a new RenderFrameHost after a process swap.
// Here, we care about the last committed URL in the FrameTreeNode,
// regardless of which process it is in.
last_committed_url = rfhi->frame_tree_node()->current_url();
} else {
NavigationEntry* last_committed = GetLastCommittedEntry();
// There must be a last-committed entry to compare URLs to. TODO(avi): When
// might Blink say that a navigation is in-page yet there be no last-
// committed entry?
if (!last_committed)
return false;
last_committed_url = last_committed->GetURL();
}
WebPreferences prefs = rfh->GetRenderViewHost()->GetWebkitPreferences();
const url::Origin& committed_origin =
rfhi->frame_tree_node()->current_origin();
bool is_same_origin = last_committed_url.is_empty() ||
// TODO(japhet): We should only permit navigations
// originating from about:blank to be in-page if the
// about:blank is the first document that frame loaded.
// We don't have sufficient information to identify
// that case at the moment, so always allow about:blank
// for now.
last_committed_url == url::kAboutBlankURL ||
last_committed_url.GetOrigin() == url.GetOrigin() ||
committed_origin == origin ||
!prefs.web_security_enabled ||
(prefs.allow_universal_access_from_file_urls &&
committed_origin.scheme() == url::kFileScheme);
if (!is_same_origin && renderer_says_same_document) {
bad_message::ReceivedBadMessage(rfh->GetProcess(),
bad_message::NC_IN_PAGE_NAVIGATION);
}
return is_same_origin && renderer_says_same_document;
}
void NavigationControllerImpl::CopyStateFrom(NavigationController* temp,
bool needs_reload) {
NavigationControllerImpl* source =
static_cast<NavigationControllerImpl*>(temp);
// Verify that we look new.
DCHECK(GetEntryCount() == 0 && !GetPendingEntry());
if (source->GetEntryCount() == 0)
return; // Nothing new to do.
needs_reload_ = needs_reload;
needs_reload_type_ = NeedsReloadType::kCopyStateFrom;
InsertEntriesFrom(source, source->GetEntryCount());
for (auto it = source->session_storage_namespace_map_.begin();
it != source->session_storage_namespace_map_.end(); ++it) {
SessionStorageNamespaceImpl* source_namespace =
static_cast<SessionStorageNamespaceImpl*>(it->second.get());
session_storage_namespace_map_[it->first] = source_namespace->Clone();
}
FinishRestore(source->last_committed_entry_index_,
RestoreType::CURRENT_SESSION);
}
void NavigationControllerImpl::CopyStateFromAndPrune(
NavigationController* temp,
bool replace_entry) {
// It is up to callers to check the invariants before calling this.
CHECK(CanPruneAllButLastCommitted());
NavigationControllerImpl* source =
static_cast<NavigationControllerImpl*>(temp);
// Remove all the entries leaving the last committed entry.
PruneAllButLastCommittedInternal();
// We now have one entry, possibly with a new pending entry. Ensure that
// adding the entries from source won't put us over the limit.
DCHECK_EQ(1, GetEntryCount());
if (!replace_entry)
source->PruneOldestSkippableEntryIfFull();
// Insert the entries from source. Don't use source->GetCurrentEntryIndex as
// we don't want to copy over the transient entry. Ignore any pending entry,
// since it has not committed in source.
int max_source_index = source->last_committed_entry_index_;
if (max_source_index == -1)
max_source_index = source->GetEntryCount();
else
max_source_index++;
// Ignore the source's current entry if merging with replacement.
// TODO(davidben): This should preserve entries forward of the current
// too. http://crbug.com/317872
if (replace_entry && max_source_index > 0)
max_source_index--;
InsertEntriesFrom(source, max_source_index);
// Adjust indices such that the last entry and pending are at the end now.
last_committed_entry_index_ = GetEntryCount() - 1;
delegate_->SetHistoryOffsetAndLength(last_committed_entry_index_,
GetEntryCount());
}
bool NavigationControllerImpl::CanPruneAllButLastCommitted() {
// If there is no last committed entry, we cannot prune. Even if there is a
// pending entry, it may not commit, leaving this WebContents blank, despite
// possibly giving it new entries via CopyStateFromAndPrune.
if (last_committed_entry_index_ == -1)
return false;
// We cannot prune if there is a pending entry at an existing entry index.
// It may not commit, so we have to keep the last committed entry, and thus
// there is no sensible place to keep the pending entry. It is ok to have
// a new pending entry, which can optionally commit as a new navigation.
if (pending_entry_index_ != -1)
return false;
// We should not prune if we are currently showing a transient entry.
if (transient_entry_index_ != -1)
return false;
return true;
}
void NavigationControllerImpl::PruneAllButLastCommitted() {
PruneAllButLastCommittedInternal();
DCHECK_EQ(0, last_committed_entry_index_);
DCHECK_EQ(1, GetEntryCount());
delegate_->SetHistoryOffsetAndLength(last_committed_entry_index_,
GetEntryCount());
}
void NavigationControllerImpl::PruneAllButLastCommittedInternal() {
// It is up to callers to check the invariants before calling this.
CHECK(CanPruneAllButLastCommitted());
// Erase all entries but the last committed entry. There may still be a
// new pending entry after this.
entries_.erase(entries_.begin(),
entries_.begin() + last_committed_entry_index_);
entries_.erase(entries_.begin() + 1, entries_.end());
last_committed_entry_index_ = 0;
}
void NavigationControllerImpl::DeleteNavigationEntries(
const DeletionPredicate& deletionPredicate) {
// It is up to callers to check the invariants before calling this.
CHECK(CanPruneAllButLastCommitted());
std::vector<int> delete_indices;
for (size_t i = 0; i < entries_.size(); i++) {
if (i != static_cast<size_t>(last_committed_entry_index_) &&
deletionPredicate.Run(entries_[i].get())) {
delete_indices.push_back(i);
}
}
if (delete_indices.empty())
return;
if (delete_indices.size() == GetEntryCount() - 1U) {
PruneAllButLastCommitted();
} else {
// Do the deletion in reverse to preserve indices.
for (auto it = delete_indices.rbegin(); it != delete_indices.rend(); ++it) {
RemoveEntryAtIndex(*it);
}
delegate_->SetHistoryOffsetAndLength(last_committed_entry_index_,
GetEntryCount());
}
delegate()->NotifyNavigationEntriesDeleted();
}
bool NavigationControllerImpl::IsEntryMarkedToBeSkipped(int index) {
auto* entry = GetEntryAtIndex(index);
return entry && entry->should_skip_on_back_forward_ui();
}
void NavigationControllerImpl::DiscardPendingEntry(bool was_failure) {
// It is not safe to call DiscardPendingEntry while NavigateToEntry is in
// progress, since this will cause a use-after-free. (We only allow this
// when the tab is being destroyed for shutdown, since it won't return to
// NavigateToEntry in that case.) http://crbug.com/347742.
CHECK(!in_navigate_to_pending_entry_ || delegate_->IsBeingDestroyed());
if (was_failure && pending_entry_) {
failed_pending_entry_id_ = pending_entry_->GetUniqueID();
} else {
failed_pending_entry_id_ = 0;
}
if (pending_entry_) {
if (pending_entry_index_ == -1)
delete pending_entry_;
pending_entry_index_ = -1;
pending_entry_ = nullptr;
}
}
void NavigationControllerImpl::SetPendingNavigationSSLError(bool error) {
if (pending_entry_)
pending_entry_->set_ssl_error(error);
}
#if defined(OS_ANDROID)
// static
bool NavigationControllerImpl::ValidateDataURLAsString(
const scoped_refptr<const base::RefCountedString>& data_url_as_string) {
if (!data_url_as_string)
return false;
if (data_url_as_string->size() > kMaxLengthOfDataURLString)
return false;
// The number of characters that is enough for validating a data: URI.
// From the GURL's POV, the only important part here is scheme, it doesn't
// check the actual content. Thus we can take only the prefix of the url, to
// avoid unneeded copying of a potentially long string.
const size_t kDataUriPrefixMaxLen = 64;
GURL data_url(
std::string(data_url_as_string->front_as<char>(),
std::min(data_url_as_string->size(), kDataUriPrefixMaxLen)));
if (!data_url.is_valid() || !data_url.SchemeIs(url::kDataScheme))
return false;
return true;
}
#endif
void NavigationControllerImpl::NotifyUserActivation() {
// When a user activation occurs, ensure that all adjacent entries for the
// same document clear their skippable bit, so that the history manipulation
// intervention does not apply to them.
// TODO(crbug.com/949279) in case it becomes necessary for resetting based on
// which frame created an entry and which frame has the user gesture.
auto* last_committed_entry = GetLastCommittedEntry();
if (!last_committed_entry)
return;
// |last_committed_entry| should not be skippable because it is the current
// entry and in case the skippable bit was earlier set then on re-navigation
// it would have been reset.
DCHECK(!last_committed_entry->should_skip_on_back_forward_ui());
SetSkippableForSameDocumentEntries(GetLastCommittedEntryIndex(), false);
}
bool NavigationControllerImpl::StartHistoryNavigationInNewSubframe(
RenderFrameHostImpl* render_frame_host,
mojo::PendingAssociatedRemote<mojom::NavigationClient>* navigation_client) {
NavigationEntryImpl* entry =
GetEntryWithUniqueID(render_frame_host->nav_entry_id());
if (!entry)
return false;
FrameNavigationEntry* frame_entry =
entry->GetFrameEntry(render_frame_host->frame_tree_node());
if (!frame_entry)
return false;
std::unique_ptr<NavigationRequest> request = CreateNavigationRequestFromEntry(
render_frame_host->frame_tree_node(), entry, frame_entry,
ReloadType::NONE, false /* is_same_document_history_load */,
true /* is_history_navigation_in_new_child */);
if (!request)
return false;
request->SetNavigationClient(std::move(*navigation_client),
render_frame_host->GetSiteInstance()->GetId());
render_frame_host->frame_tree_node()->navigator()->Navigate(
std::move(request), ReloadType::NONE, RestoreType::NONE);
return true;
}
void NavigationControllerImpl::GoToOffsetInSandboxedFrame(
int offset,
int sandbox_frame_tree_node_id) {
if (!CanGoToOffset(offset))
return;
GoToIndex(GetIndexForOffset(offset), sandbox_frame_tree_node_id);
}
void NavigationControllerImpl::NavigateFromFrameProxy(
RenderFrameHostImpl* render_frame_host,
const GURL& url,
const base::Optional<url::Origin>& initiator_origin,
bool is_renderer_initiated,
SiteInstance* source_site_instance,
const Referrer& referrer,
ui::PageTransition page_transition,
bool should_replace_current_entry,
NavigationDownloadPolicy download_policy,
const std::string& method,
scoped_refptr<network::ResourceRequestBody> post_body,
const std::string& extra_headers,
scoped_refptr<network::SharedURLLoaderFactory> blob_url_loader_factory) {
if (is_renderer_initiated)
DCHECK(initiator_origin.has_value());
FrameTreeNode* node = render_frame_host->frame_tree_node();
// Create a NavigationEntry for the transfer, without making it the pending
// entry. Subframe transfers should have a clone of the last committed entry
// with a FrameNavigationEntry for the target frame. Main frame transfers
// should have a new NavigationEntry.
// TODO(creis): Make this unnecessary by creating (and validating) the params
// directly, passing them to the destination RenderFrameHost. See
// https://crbug.com/536906.
std::unique_ptr<NavigationEntryImpl> entry;
if (!node->IsMainFrame()) {
// Subframe case: create FrameNavigationEntry.
if (GetLastCommittedEntry()) {
entry = GetLastCommittedEntry()->Clone();
entry->set_extra_headers(extra_headers);
// TODO(arthursonzogni): What about |is_renderer_initiated|?
// Renderer-initiated navigation that target a remote frame are currently
// classified as browser-initiated when this one has already navigated.
// See https://crbug.com/722251.
} else {
// If there's no last committed entry, create an entry for about:blank
// with a subframe entry for our destination.
// TODO(creis): Ensure this case can't exist in https://crbug.com/524208.
entry = NavigationEntryImpl::FromNavigationEntry(CreateNavigationEntry(
GURL(url::kAboutBlankURL), referrer, initiator_origin,
page_transition, is_renderer_initiated, extra_headers,
browser_context_, nullptr /* blob_url_loader_factory */));
}
entry->AddOrUpdateFrameEntry(
node, -1, -1, nullptr,
static_cast<SiteInstanceImpl*>(source_site_instance), url,
base::nullopt /* commit_origin */, referrer, initiator_origin,
std::vector<GURL>(), PageState(), method, -1, blob_url_loader_factory);
} else {
// Main frame case.
entry = NavigationEntryImpl::FromNavigationEntry(CreateNavigationEntry(
url, referrer, initiator_origin, page_transition, is_renderer_initiated,
extra_headers, browser_context_, blob_url_loader_factory));
entry->root_node()->frame_entry->set_source_site_instance(
static_cast<SiteInstanceImpl*>(source_site_instance));
entry->root_node()->frame_entry->set_method(method);
}
// Don't allow an entry replacement if there is no entry to replace.
// http://crbug.com/457149
if (should_replace_current_entry && GetEntryCount() > 0)
entry->set_should_replace_entry(true);
bool override_user_agent = false;
if (GetLastCommittedEntry() &&
GetLastCommittedEntry()->GetIsOverridingUserAgent()) {
entry->SetIsOverridingUserAgent(true);
override_user_agent = true;
}
// TODO(creis): Set user gesture and intent received timestamp on Android.
// We may not have successfully added the FrameNavigationEntry to |entry|
// above (per https://crbug.com/608402), in which case we create it from
// scratch. This works because we do not depend on |frame_entry| being inside
// |entry| during NavigateToEntry. This will go away when we shortcut this
// further in https://crbug.com/536906.
scoped_refptr<FrameNavigationEntry> frame_entry(entry->GetFrameEntry(node));
if (!frame_entry) {
frame_entry = base::MakeRefCounted<FrameNavigationEntry>(
node->unique_name(), -1, -1, nullptr,
static_cast<SiteInstanceImpl*>(source_site_instance), url,
nullptr /* origin */, referrer, initiator_origin, std::vector<GURL>(),
PageState(), method, -1, blob_url_loader_factory);
}
LoadURLParams params(url);
params.initiator_origin = initiator_origin;
params.source_site_instance = source_site_instance;
params.load_type = method == "POST" ? LOAD_TYPE_HTTP_POST : LOAD_TYPE_DEFAULT;
params.transition_type = page_transition;
params.frame_tree_node_id = node->frame_tree_node_id();
params.referrer = referrer;
/* params.redirect_chain: skip */
params.extra_headers = extra_headers;
params.is_renderer_initiated = is_renderer_initiated;
params.override_user_agent = UA_OVERRIDE_INHERIT;
/* params.base_url_for_data_url: skip */
/* params.virtual_url_for_data_url: skip */
/* params.data_url_as_string: skip */
params.post_data = post_body;
params.can_load_local_resources = false;
params.should_replace_current_entry = false;
/* params.frame_name: skip */
// TODO(clamy): See if user gesture should be propagated to this function.
params.has_user_gesture = false;
params.should_clear_history_list = false;
params.started_from_context_menu = false;
/* params.navigation_ui_data: skip */
/* params.input_start: skip */
params.was_activated = mojom::WasActivatedOption::kUnknown;
/* params.reload_type: skip */
std::unique_ptr<NavigationRequest> request =
CreateNavigationRequestFromLoadParams(
node, params, override_user_agent, should_replace_current_entry,
false /* has_user_gesture */, download_policy, ReloadType::NONE,
entry.get(), frame_entry.get());
if (!request)
return;
node->navigator()->Navigate(std::move(request), ReloadType::NONE,
RestoreType::NONE);
}
void NavigationControllerImpl::SetSessionStorageNamespace(
const std::string& partition_id,
SessionStorageNamespace* session_storage_namespace) {
if (!session_storage_namespace)
return;
// We can't overwrite an existing SessionStorage without violating spec.
// Attempts to do so may give a tab access to another tab's session storage
// so die hard on an error.
bool successful_insert = session_storage_namespace_map_.insert(
make_pair(partition_id,
static_cast<SessionStorageNamespaceImpl*>(
session_storage_namespace)))
.second;
CHECK(successful_insert) << "Cannot replace existing SessionStorageNamespace";
}
bool NavigationControllerImpl::IsUnmodifiedBlankTab() {
return IsInitialNavigation() &&
!GetLastCommittedEntry() &&
!delegate_->HasAccessedInitialDocument();
}
SessionStorageNamespace*
NavigationControllerImpl::GetSessionStorageNamespace(SiteInstance* instance) {
std::string partition_id;
if (instance) {
// TODO(ajwong): When GetDefaultSessionStorageNamespace() goes away, remove
// this if statement so |instance| must not be NULL.
partition_id =
GetContentClient()->browser()->GetStoragePartitionIdForSite(
browser_context_, instance->GetSiteURL());
}
// TODO(ajwong): Should this use the |partition_id| directly rather than
// re-lookup via |instance|? http://crbug.com/142685
StoragePartition* partition =
BrowserContext::GetStoragePartition(browser_context_, instance);
DOMStorageContextWrapper* context_wrapper =
static_cast<DOMStorageContextWrapper*>(partition->GetDOMStorageContext());
SessionStorageNamespaceMap::const_iterator it =
session_storage_namespace_map_.find(partition_id);
if (it != session_storage_namespace_map_.end()) {
// Ensure that this namespace actually belongs to this partition.
DCHECK(static_cast<SessionStorageNamespaceImpl*>(it->second.get())->
IsFromContext(context_wrapper));
return it->second.get();
}
// Create one if no one has accessed session storage for this partition yet.
scoped_refptr<SessionStorageNamespaceImpl> session_storage_namespace =
SessionStorageNamespaceImpl::Create(context_wrapper);
SessionStorageNamespaceImpl* session_storage_namespace_ptr =
session_storage_namespace.get();
session_storage_namespace_map_[partition_id] =
std::move(session_storage_namespace);
return session_storage_namespace_ptr;
}
SessionStorageNamespace*
NavigationControllerImpl::GetDefaultSessionStorageNamespace() {
// TODO(ajwong): Remove if statement in GetSessionStorageNamespace().
return GetSessionStorageNamespace(nullptr);
}
const SessionStorageNamespaceMap&
NavigationControllerImpl::GetSessionStorageNamespaceMap() {
return session_storage_namespace_map_;
}
bool NavigationControllerImpl::NeedsReload() {
return needs_reload_;
}
void NavigationControllerImpl::SetNeedsReload() {
SetNeedsReload(NeedsReloadType::kRequestedByClient);
}
void NavigationControllerImpl::SetNeedsReload(NeedsReloadType type) {
needs_reload_ = true;
needs_reload_type_ = type;
if (last_committed_entry_index_ != -1) {
entries_[last_committed_entry_index_]->SetTransitionType(
ui::PAGE_TRANSITION_RELOAD);
}
}
void NavigationControllerImpl::RemoveEntryAtIndexInternal(int index) {
DCHECK_LT(index, GetEntryCount());
DCHECK_NE(index, last_committed_entry_index_);
const bool was_transient = index == transient_entry_index_;
DiscardNonCommittedEntries();
if (was_transient) {
// There's nothing left to do if the index referred to a transient entry
// that we just discarded.
DCHECK(!GetTransientEntry());
return;
}
entries_.erase(entries_.begin() + index);
if (last_committed_entry_index_ > index)
last_committed_entry_index_--;
}
void NavigationControllerImpl::DiscardNonCommittedEntries() {
bool transient = transient_entry_index_ != -1;
DiscardNonCommittedEntriesInternal();
// If there was a transient entry, invalidate everything so the new active
// entry state is shown.
if (transient) {
delegate_->NotifyNavigationStateChanged(INVALIDATE_TYPE_ALL);
}
}
NavigationEntryImpl* NavigationControllerImpl::GetPendingEntry() {
// If there is no pending_entry_, there should be no pending_entry_index_.
DCHECK(pending_entry_ || pending_entry_index_ == -1);
// If there is a pending_entry_index_, then pending_entry_ must be the entry
// at that index.
DCHECK(pending_entry_index_ == -1 ||
pending_entry_ == GetEntryAtIndex(pending_entry_index_));
return pending_entry_;
}
int NavigationControllerImpl::GetPendingEntryIndex() {
// The pending entry index must always be less than the number of entries.
// If there are no entries, it must be exactly -1.
DCHECK_LT(pending_entry_index_, GetEntryCount());
DCHECK(GetEntryCount() != 0 || pending_entry_index_ == -1);
return pending_entry_index_;
}
void NavigationControllerImpl::InsertOrReplaceEntry(
std::unique_ptr<NavigationEntryImpl> entry,
bool replace) {
DCHECK(!ui::PageTransitionCoreTypeIs(entry->GetTransitionType(),
ui::PAGE_TRANSITION_AUTO_SUBFRAME));
// If the pending_entry_index_ is -1, the navigation was to a new page, and we
// need to keep continuity with the pending entry, so copy the pending entry's
// unique ID to the committed entry. If the pending_entry_index_ isn't -1,
// then the renderer navigated on its own, independent of the pending entry,
// so don't copy anything.
if (pending_entry_ && pending_entry_index_ == -1)
entry->set_unique_id(pending_entry_->GetUniqueID());
DiscardNonCommittedEntriesInternal();
int current_size = static_cast<int>(entries_.size());
// When replacing, don't prune the forward history.
if (replace && current_size > 0) {
CopyReplacedNavigationEntryDataIfPreviouslyEmpty(
entries_[last_committed_entry_index_].get(), entry.get());
entries_[last_committed_entry_index_] = std::move(entry);
return;
}
// We shouldn't see replace == true when there's no committed entries.
DCHECK(!replace);
if (current_size > 0) {
// Prune any entries which are in front of the current entry.
int num_pruned = 0;
while (last_committed_entry_index_ < (current_size - 1)) {
num_pruned++;
entries_.pop_back();
current_size--;
}
if (num_pruned > 0) { // Only notify if we did prune something.
NotifyPrunedEntries(this,
last_committed_entry_index_ + 1 /* start index */,
num_pruned /* count */);
}
}
PruneOldestSkippableEntryIfFull();
entries_.push_back(std::move(entry));
last_committed_entry_index_ = static_cast<int>(entries_.size()) - 1;
}
void NavigationControllerImpl::PruneOldestSkippableEntryIfFull() {
if (entries_.size() < max_entry_count())
return;
DCHECK_EQ(max_entry_count(), entries_.size());
DCHECK_GT(last_committed_entry_index_, 0);
CHECK_EQ(pending_entry_index_, -1);
int index = 0;
if (base::FeatureList::IsEnabled(
features::kHistoryManipulationIntervention)) {
// Retrieve the oldest skippable entry.
for (; index < GetEntryCount(); index++) {
if (GetEntryAtIndex(index)->should_skip_on_back_forward_ui())
break;
}
}
// If there is no skippable entry or if it is the last committed entry then
// fall back to pruning the oldest entry. It is not safe to prune the last
// committed entry.
if (index == GetEntryCount() || index == last_committed_entry_index_)
index = 0;
bool should_succeed = RemoveEntryAtIndex(index);
DCHECK_EQ(true, should_succeed);
NotifyPrunedEntries(this, index, 1);
}
void NavigationControllerImpl::NavigateToExistingPendingEntry(
ReloadType reload_type,
int sandboxed_source_frame_tree_node_id) {
DCHECK(pending_entry_);
DCHECK(IsInitialNavigation() || pending_entry_index_ != -1);
DCHECK(!IsRendererDebugURL(pending_entry_->GetURL()));
needs_reload_ = false;
FrameTreeNode* root = delegate_->GetFrameTree()->root();
int nav_entry_id = pending_entry_->GetUniqueID();
// BackForwardCache:
// Navigate immediately if the document is in the BackForwardCache.
if (back_forward_cache_.GetDocument(nav_entry_id)) {
DCHECK_EQ(reload_type, ReloadType::NONE);
auto navigation_request = CreateNavigationRequestFromEntry(
root, pending_entry_, pending_entry_->GetFrameEntry(root),
ReloadType::NONE, false /* is_same_document_history_load */,
false /* is_history_navigation_in_new_child */);
root->navigator()->Navigate(std::move(navigation_request), ReloadType::NONE,
RestoreType::NONE);
return;
}
// By design, a page in the BackForwardCache is alone in its BrowsingInstance.
// History navigation might try to reuse a specific SiteInstance, already used
// by a page in the cache. This must not happen. It would fail creating the
// RenderFrame, because only one main document can live there. For this
// reason, the BackForwardCache is flushed.
// TODO(arthursonzogni): Flushing the entire cache is a bit overkill, this can
// be refined to only delete the page (if any) using the same
// BrowsingInstance.
if (pending_entry_->site_instance()) {
SiteInstance* current = root->current_frame_host()->GetSiteInstance();
if (!current->IsRelatedSiteInstance(pending_entry_->site_instance()))
back_forward_cache_.Flush();
}
// If we were navigating to a slow-to-commit page, and the user performs
// a session history navigation to the last committed page, RenderViewHost
// will force the throbber to start, but WebKit will essentially ignore the
// navigation, and won't send a message to stop the throbber. To prevent this
// from happening, we drop the navigation here and stop the slow-to-commit
// page from loading (which would normally happen during the navigation).
if (pending_entry_index_ == last_committed_entry_index_ &&
pending_entry_->restore_type() == RestoreType::NONE &&
pending_entry_->GetTransitionType() & ui::PAGE_TRANSITION_FORWARD_BACK) {
delegate_->Stop();
// If an interstitial page is showing, we want to close it to get back to
// what was showing before.
//
// There are two ways to get the interstitial page given a WebContents.
// Because WebContents::GetInterstitialPage() returns null between the
// interstitial's Show() method being called and the interstitial becoming
// visible, while InterstitialPage::GetInterstitialPage() returns the
// interstitial during that time, use the latter.
InterstitialPage* interstitial =
InterstitialPage::GetInterstitialPage(GetWebContents());
if (interstitial)
interstitial->DontProceed();
DiscardNonCommittedEntries();
return;
}
// Compare FrameNavigationEntries to see which frames in the tree need to be
// navigated.
std::vector<std::unique_ptr<NavigationRequest>> same_document_loads;
std::vector<std::unique_ptr<NavigationRequest>> different_document_loads;
if (GetLastCommittedEntry()) {
FindFramesToNavigate(root, reload_type, &same_document_loads,
&different_document_loads);
}
if (same_document_loads.empty() && different_document_loads.empty()) {
// If we don't have any frames to navigate at this point, either
// (1) there is no previous history entry to compare against, or
// (2) we were unable to match any frames by name. In the first case,
// doing a different document navigation to the root item is the only valid
// thing to do. In the second case, we should have been able to find a
// frame to navigate based on names if this were a same document
// navigation, so we can safely assume this is the different document case.
std::unique_ptr<NavigationRequest> navigation_request =
CreateNavigationRequestFromEntry(
root, pending_entry_, pending_entry_->GetFrameEntry(root),
reload_type, false /* is_same_document_history_load */,
false /* is_history_navigation_in_new_child */);
if (!navigation_request) {
// This navigation cannot start (e.g. the URL is invalid), delete the
// pending NavigationEntry.
DiscardPendingEntry(false);
return;
}
different_document_loads.push_back(std::move(navigation_request));
}
// If |sandboxed_source_frame_node_id| is valid, then track whether this
// navigation affects any frame outside the frame's subtree.
if (sandboxed_source_frame_tree_node_id !=
FrameTreeNode::kFrameTreeNodeInvalidId) {
bool navigates_inside_tree =
DoesSandboxNavigationStayWithinSubtree(
sandboxed_source_frame_tree_node_id, same_document_loads) &&
DoesSandboxNavigationStayWithinSubtree(
sandboxed_source_frame_tree_node_id, different_document_loads);
UMA_HISTOGRAM_BOOLEAN(
"Navigation.SandboxFrameBackForwardStaysWithinSubtree",
navigates_inside_tree);
// Also count the navigations as web use counters so we can determine
// the number of pages that trigger this.
FrameTreeNode* sandbox_source_frame_tree_node =
FrameTreeNode::GloballyFindByID(sandboxed_source_frame_tree_node_id);
if (sandbox_source_frame_tree_node) {
GetContentClient()->browser()->LogWebFeatureForCurrentPage(
sandbox_source_frame_tree_node->current_frame_host(),
navigates_inside_tree
? blink::mojom::WebFeature::kSandboxBackForwardStaysWithinSubtree
: blink::mojom::WebFeature::
kSandboxBackForwardAffectsFramesOutsideSubtree);
}
// If the navigation occurred outside the tree discard it because
// the sandboxed frame didn't have permission to navigate outside
// its tree. If it is possible that the navigation is both inside and
// outside the frame tree and we discard it entirely because we don't
// want to end up in a history state that didn't exist before.
if (base::FeatureList::IsEnabled(
features::kHistoryPreventSandboxedNavigation) &&
!navigates_inside_tree) {
DiscardPendingEntry(false);
return;
}
}
// If an interstitial page is showing, the previous renderer is blocked and
// cannot make new requests. Unblock (and disable) it to allow this
// navigation to succeed. The interstitial will stay visible until the
// resulting DidNavigate.
// TODO(clamy): See if this can be removed. See https://crbug.com/849250.
if (delegate_->GetInterstitialPage()) {
static_cast<InterstitialPageImpl*>(delegate_->GetInterstitialPage())
->CancelForNavigation();
}
// This call does not support re-entrancy. See http://crbug.com/347742.
CHECK(!in_navigate_to_pending_entry_);
in_navigate_to_pending_entry_ = true;
// Send all the same document frame loads before the different document loads.
for (auto& item : same_document_loads) {
FrameTreeNode* frame = item->frame_tree_node();
frame->navigator()->Navigate(std::move(item), reload_type,
pending_entry_->restore_type());
}
for (auto& item : different_document_loads) {
FrameTreeNode* frame = item->frame_tree_node();
frame->navigator()->Navigate(std::move(item), reload_type,
pending_entry_->restore_type());
}
in_navigate_to_pending_entry_ = false;
}
void NavigationControllerImpl::FindFramesToNavigate(
FrameTreeNode* frame,
ReloadType reload_type,
std::vector<std::unique_ptr<NavigationRequest>>* same_document_loads,
std::vector<std::unique_ptr<NavigationRequest>>* different_document_loads) {
// A frame pending deletion is not allowed to navigate anymore. It has been
// deleted and the browser already committed to destroying this
// RenderFrameHost. See https://crbug.com/930278.
if (!frame->current_frame_host()->is_active())
return;
DCHECK(pending_entry_);
DCHECK_GE(last_committed_entry_index_, 0);
FrameNavigationEntry* new_item = pending_entry_->GetFrameEntry(frame);
// TODO(creis): Store the last committed FrameNavigationEntry to use here,
// rather than assuming the NavigationEntry has up to date info on subframes.
FrameNavigationEntry* old_item =
GetLastCommittedEntry()->GetFrameEntry(frame);
if (!new_item)
return;
// Schedule a load in this frame if the new item isn't for the same item
// sequence number in the same SiteInstance. Newly restored items may not have
// a SiteInstance yet, in which case it will be assigned on first commit.
if (!old_item ||
new_item->item_sequence_number() != old_item->item_sequence_number() ||
(new_item->site_instance() != nullptr &&
new_item->site_instance() != old_item->site_instance())) {
// Same document loads happen if the previous item has the same document
// sequence number. Note that we should treat them as different document if
// the destination RenderFrameHost (which is necessarily the current
// RenderFrameHost for same document navigations) doesn't have a last
// committed page. This case can happen for Ctrl+Back or after a renderer
// crash.
if (old_item &&
new_item->document_sequence_number() ==
old_item->document_sequence_number()