blob: 6fe6df67efad4bb50fe877261282388db42466f8 [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/renderer_host/navigation_controller_impl.h"
#include <algorithm>
#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_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/renderer_host/debug_urls.h"
#include "content/browser/renderer_host/frame_tree.h"
#include "content/browser/renderer_host/navigation_entry_impl.h"
#include "content/browser/renderer_host/navigation_request.h"
#include "content/browser/renderer_host/navigator.h"
#include "content/browser/renderer_host/render_frame_host_delegate.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/web_package/web_bundle_navigation_info.h"
#include "content/common/content_constants_internal.h"
#include "content/common/frame_messages.h"
#include "content/common/trace_utils.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_view_host.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_constants.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 "services/metrics/public/cpp/ukm_source_id.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);
}
// 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 (auto& entry : *entries) {
// Use a transition type of reload so that we don't incorrectly increase
// the typed count.
entry->SetTransitionType(ui::PAGE_TRANSITION_RELOAD);
entry->set_restore_type(type);
}
}
// 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;
}
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.
// |node| is the FrameTreeNode which is navigating. |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(FrameTreeNode* node,
const GURL& url,
const GURL& virtual_url,
const GURL& base_url_for_data_url,
ui::PageTransition transition_type,
bool is_post,
bool is_reload,
bool is_navigation_to_existing_entry,
NavigationEntryImpl* last_committed_entry) {
if (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 URLs match.
FrameNavigationEntry* frame_entry = last_committed_entry->GetFrameEntry(node);
// If there's no frame entry then by definition the URLs don't match.
if (!frame_entry)
return false;
if (url != frame_entry->url())
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 (frame_entry->get_has_post_data() || 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 mojom::DidCommitProvisionalLoadParams& 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;
}
// Reject renderer debug URLs because they should have been handled before
// we get to this point. This check handles renderer debug URLs
// that are inside a view-source: URL (e.g. view-source:chrome://kill) and
// provides defense-in-depth if a renderer debug URL manages to get here via
// some other path. We want to reject the navigation here so it doesn't
// violate assumptions in downstream code.
if (IsRendererDebugURL(dest_url)) {
LOG(WARNING) << "Refusing to load renderer debug URL: "
<< dest_url.possibly_invalid_spec();
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 has_pending_cross_document_commit,
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->IsRestored()) {
return entry->GetHasPostData() ? mojom::NavigationType::RESTORE_WITH_POST
: mojom::NavigationType::RESTORE;
}
// A pending cross-document commit means this navigation will not occur in
// the current document, as that document would end up being replaced in the
// meantime.
const bool can_be_same_document = !has_pending_cross_document_commit;
// History navigations.
if (frame_entry.page_state().IsValid()) {
return can_be_same_document && is_same_document_history_load
? mojom::NavigationType::HISTORY_SAME_DOCUMENT
: 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.
bool is_same_doc = new_url.has_ref() && old_url.EqualsIgnoringRef(new_url) &&
frame_entry.method() == "GET";
// The one case where we do the wrong thing here and incorrectly choose
// SAME_DOCUMENT is if the navigation is browser-initiated but the document in
// the renderer is a frameset. All frameset navigations should be
// DIFFERENT_DOCUMENT, even if their URLs match. A renderer-initiated
// navigation would do the right thing, as it would send it to the browser and
// all renderer-initiated navigations are DIFFERENT_DOCUMENT (they don't get
// into this method). But since we can't tell that case here for browser-
// initiated navigations, we have to get the renderer involved. In that case
// the navigation would be restarted due to the renderer spending a reply of
// mojom::CommitResult::RestartCrossDocument.
return can_be_same_document && is_same_doc
? mojom::NavigationType::SAME_DOCUMENT
: 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) {
// 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 = original_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().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 = FrameTreeNode::From(frame->parent())) {
if (frame->frame_tree_node_id() == sandbox_frame_tree_node_id) {
within_subtree = true;
break;
}
}
if (!within_subtree)
return false;
}
return true;
}
bool ShouldStoreDocumentPoliciesInFrameNavigationEntry(
const NavigationRequest* request) {
// For local schemes we need to store the policy container in the
// FrameNavigationEntry, so that we can reload it in case of history
// navigation.
//
// TODO(https://crbug.com/1146361 and https://crbug.com/1146362): blob: and
// filesystem: should be removed from this list when we have properly
// implemented storing their policy container in the respective store.
return (request->common_params().url.SchemeIs(url::kAboutScheme) ||
request->common_params().url.SchemeIs(url::kDataScheme) ||
request->common_params().url.SchemeIsBlob() ||
request->common_params().url.SchemeIsFileSystem());
}
} // namespace
// NavigationControllerImpl::PendingEntryRef------------------------------------
NavigationControllerImpl::PendingEntryRef::PendingEntryRef(
base::WeakPtr<NavigationControllerImpl> controller)
: controller_(controller) {}
NavigationControllerImpl::PendingEntryRef::~PendingEntryRef() {
if (!controller_) // Can be null with interstitials.
return;
controller_->PendingEntryRefDeleted(this);
}
// 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,
Referrer referrer,
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) {
return NavigationControllerImpl::CreateNavigationEntry(
url, referrer, std::move(initiator_origin),
nullptr /* source_site_instance */, transition, is_renderer_initiated,
extra_headers, browser_context, std::move(blob_url_loader_factory),
false /* should_replace_entry */, nullptr /* web_contents */);
}
// static
std::unique_ptr<NavigationEntryImpl>
NavigationControllerImpl::CreateNavigationEntry(
const GURL& url,
Referrer referrer,
base::Optional<url::Origin> initiator_origin,
SiteInstance* source_site_instance,
ui::PageTransition transition,
bool is_renderer_initiated,
const std::string& extra_headers,
BrowserContext* browser_context,
scoped_refptr<network::SharedURLLoaderFactory> blob_url_loader_factory,
bool should_replace_entry,
WebContents* web_contents) {
GURL url_to_load;
GURL virtual_url;
bool reverse_on_redirect = false;
RewriteUrlForNavigation(url, browser_context, &url_to_load, &virtual_url,
&reverse_on_redirect);
// Let the NTP override the navigation params and pretend that this is a
// browser-initiated, bookmark-like navigation.
GetContentClient()->browser()->OverrideNavigationParams(
web_contents, source_site_instance, &transition, &is_renderer_initiated,
&referrer, &initiator_origin);
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);
entry->set_should_replace_entry(should_replace_entry);
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::ScopedShowRepostDialogForTesting::
ScopedShowRepostDialogForTesting()
: was_disallowed_(g_check_for_repost) {
g_check_for_repost = true;
}
NavigationControllerImpl::ScopedShowRepostDialogForTesting::
~ScopedShowRepostDialogForTesting() {
g_check_for_repost = was_disallowed_;
}
NavigationControllerImpl::NavigationControllerImpl(
NavigationControllerDelegate* delegate,
BrowserContext* browser_context)
: browser_context_(browser_context),
delegate_(delegate),
ssl_manager_(this),
get_timestamp_callback_(base::BindRepeating(&base::Time::Now)) {
DCHECK(browser_context_);
}
NavigationControllerImpl::~NavigationControllerImpl() {
// The NavigationControllerImpl might be called inside its delegate
// destructor. Calling it is not valid anymore.
delegate_ = nullptr;
DiscardNonCommittedEntries();
}
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_EQ(0, GetEntryCount());
DCHECK(!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);
NavigationEntryImpl* entry = nullptr;
int current_index = -1;
if (entry_replaced_by_post_commit_error_) {
// If there is an entry that was replaced by a currently active post-commit
// error navigation, this can't be the initial navigation.
DCHECK(!IsInitialNavigation());
// If the current entry is a post commit error, we reload the entry it
// replaced instead. We leave the error entry in place until a commit
// replaces it, but the pending entry points to the original entry in the
// meantime. Note that NavigateToExistingPendingEntry is able to handle the
// case that pending_entry_ != entries_[pending_entry_index_].
entry = entry_replaced_by_post_commit_error_.get();
current_index = GetCurrentEntryIndex();
} else if (IsInitialNavigation() && pending_entry_) {
// If we are reloading the initial navigation, just use the current
// pending entry. Otherwise look up the current 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 {
DiscardNonCommittedEntries();
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();
return;
}
if (!IsInitialNavigation())
DiscardNonCommittedEntries();
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::RegisterExistingOriginToPreventOptInIsolation(
const url::Origin& origin) {
for (int i = 0; i < GetEntryCount(); i++) {
auto* entry = GetEntryAtIndex(i);
entry->RegisterExistingOriginToPreventOptInIsolation(origin);
}
if (entry_replaced_by_post_commit_error_) {
// It's possible we could come back to this entry if the error
// page/interstitial goes away.
entry_replaced_by_post_commit_error_
->RegisterExistingOriginToPreventOptInIsolation(origin);
}
// TODO(wjmaclean): Register pending commit NavigationRequests rather than
// visiting pending_entry_, which lacks a committed origin. This will be done
// in https://chromium-review.googlesource.com/c/chromium/src/+/2136703.
}
void NavigationControllerImpl::SetPendingEntry(
std::unique_ptr<NavigationEntryImpl> entry) {
DiscardNonCommittedEntries();
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 (pending_entry_)
return pending_entry_;
return GetLastCommittedEntry();
}
NavigationEntryImpl* NavigationControllerImpl::GetVisibleEntry() {
// 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 (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;
}
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.
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());
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;
}
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::PruneForwardEntries() {
DiscardNonCommittedEntries();
int remove_start_index = last_committed_entry_index_ + 1;
int num_removed = static_cast<int>(entries_.size()) - remove_start_index;
if (num_removed <= 0)
return;
entries_.erase(entries_.begin() + remove_start_index, entries_.end());
NotifyPrunedEntries(this, remove_start_index /* start index */,
num_removed /* count */);
}
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;
}
// The user initiated a load, we don't need to reload anymore.
needs_reload_ = false;
NavigateWithoutEntry(params);
}
bool NavigationControllerImpl::PendingEntryMatchesRequest(
NavigationRequest* request) const {
return pending_entry_ &&
pending_entry_->GetUniqueID() == request->nav_entry_id();
}
bool NavigationControllerImpl::RendererDidNavigate(
RenderFrameHostImpl* rfh,
const mojom::DidCommitProvisionalLoadParams& 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()) {
if (entry_replaced_by_post_commit_error_) {
if (is_same_document_navigation) {
// Same document navigations should not be possible on error pages and
// would leave the controller in a weird state. Kill the renderer if
// that happens.
bad_message::ReceivedBadMessage(
rfh->GetProcess(), bad_message::NC_SAME_DOCUMENT_POST_COMMIT_ERROR);
}
// Any commit while a post-commit error page is showing should put the
// original entry back, replacing the error page's entry. This includes
// reloads, where the original entry was used as the pending entry and
// should now be at the correct index at commit time.
entries_[last_committed_entry_index_] =
std::move(entry_replaced_by_post_commit_error_);
}
details->previous_main_frame_url = GetLastCommittedEntry()->GetURL();
details->previous_entry_index = GetLastCommittedEntryIndex();
if (pending_entry_ &&
pending_entry_->GetIsOverridingUserAgent() !=
GetLastCommittedEntry()->GetIsOverridingUserAgent())
overriding_user_agent_changed = true;
} else {
details->previous_main_frame_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(rfh, details,
navigation_request);
}
}
}
// 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_->IsRestored());
if (pending_entry_ && pending_entry_->IsRestored()) {
pending_entry_->set_restore_type(RestoreType::kNotRestored);
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() ==
navigation_request->commit_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, navigation_request);
// 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.
bool keep_pending_entry = is_same_document_navigation &&
details->type == NAVIGATION_TYPE_EXISTING_PAGE &&
pending_entry_ &&
!PendingEntryMatchesRequest(navigation_request);
switch (details->type) {
case NAVIGATION_TYPE_NEW_PAGE:
RendererDidNavigateToNewPage(
rfh, params, details->is_same_document, details->did_replace_entry,
previous_document_was_activated, navigation_request);
break;
case NAVIGATION_TYPE_EXISTING_PAGE:
RendererDidNavigateToExistingPage(rfh, params, details->is_same_document,
was_restored, navigation_request,
keep_pending_entry);
break;
case NAVIGATION_TYPE_SAME_PAGE:
RendererDidNavigateToSamePage(rfh, params, details->is_same_document,
navigation_request);
break;
case NAVIGATION_TYPE_NEW_SUBFRAME:
RendererDidNavigateNewSubframe(
rfh, params, details->is_same_document, details->did_replace_entry,
previous_document_was_activated, navigation_request);
break;
case NAVIGATION_TYPE_AUTO_SUBFRAME:
if (!RendererDidNavigateAutoSubframe(
rfh, params, details->is_same_document, navigation_request)) {
// 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();
return false;
case NAVIGATION_TYPE_UNKNOWN:
NOTREACHED();
break;
}
// 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.ToDeltaSinceWindowsEpoch().InMicroseconds();
// 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)
DiscardNonCommittedEntries();
// 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,
back_forward_cache_.IsAllowed(navigation_request->GetURL()));
// 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());
// 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.
frame_entry->SetBindings(rfh->GetEnabledBindings());
}
// Once it is committed, we no longer need to track several pieces of state on
// the entry.
active_entry->ResetForCommit(frame_entry);
// 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());
// 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;
// If the NavigationRequest was created without a NavigationEntry and
// SetIsOverridingUserAgent() was called, it needs to be applied to the
// NavigationEntry now.
if (!navigation_request->nav_entry_id() &&
navigation_request->was_set_overriding_user_agent_called()) {
active_entry->SetIsOverridingUserAgent(
navigation_request->entry_overrides_ua());
}
NotifyNavigationEntryCommitted(details);
if (active_entry->GetURL().SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
navigation_request->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 mojom::DidCommitProvisionalLoadParams& params,
NavigationRequest* navigation_request) {
TraceReturnReason<tracing_category::kNavigation> trace_return(
"ClassifyNavigation");
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()) {
trace_return.set_return_reason("new entry, no parent, new page");
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()) {
trace_return.set_return_reason("new entry, no last committed, ignore");
return NAVIGATION_TYPE_NAV_IGNORE;
}
// Valid subframe navigation.
trace_return.set_return_reason("new entry, new subframe");
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()) {
trace_return.set_return_reason("subframe, last commmited, auto subframe");
return NAVIGATION_TYPE_AUTO_SUBFRAME;
}
// We ignore subframes created in non-committed pages; we'd appreciate if
// people stopped doing that.
trace_return.set_return_reason("subframe, no last commmited, ignore");
return NAVIGATION_TYPE_NAV_IGNORE;
}
const int nav_entry_id = navigation_request->commit_params().nav_entry_id;
if (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) {
trace_return.set_return_reason("nav entry 0, no last committed, ignore");
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.
trace_return.set_return_reason(
"nav entry 0, last committed, existing page");
return NAVIGATION_TYPE_EXISTING_PAGE;
}
if (pending_entry_ && pending_entry_->GetUniqueID() == 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()) {
trace_return.set_return_reason("pending matching nav entry, new page");
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()) {
trace_return.set_return_reason("no pending, new page");
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.
trace_return.set_return_reason("no pending, same page");
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()) {
trace_return.set_return_reason("no last committed, new page");
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.
trace_return.set_return_reason("indented as new entry, new page");
return NAVIGATION_TYPE_EXISTING_PAGE;
}
if (params.url_is_unreachable && failed_pending_entry_id_ != 0 &&
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.
trace_return.set_return_reason(
"unreachable, matching pending, existing page");
return NAVIGATION_TYPE_EXISTING_PAGE;
}
// Now we know that the notification is for an existing page. Find that entry.
int existing_entry_index = GetEntryIndexWithUniqueID(nav_entry_id);
trace_return.traced_value()->SetInteger("existing_entry_index",
existing_entry_index);
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.
trace_return.set_return_reason("existing entry -1, new page");
return NAVIGATION_TYPE_NEW_PAGE;
}
// Since we weeded out "new" navigations above, we know this is an existing
// (back/forward) navigation.
trace_return.set_return_reason("default return, existing page");
return NAVIGATION_TYPE_EXISTING_PAGE;
}
void NavigationControllerImpl::RendererDidNavigateToNewPage(
RenderFrameHostImpl* rfh,
const mojom::DidCommitProvisionalLoadParams& params,
bool is_same_document,
bool replace_entry,
bool previous_document_was_activated,
NavigationRequest* request) {
std::unique_ptr<NavigationEntryImpl> new_entry;
bool update_virtual_url = false;
const base::Optional<url::Origin>& initiator_origin =
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,
Referrer(*params.referrer), initiator_origin, params.redirects,
params.page_state, params.method, params.post_id,
nullptr /* blob_url_loader_factory */,
nullptr /* web_bundle_navigation_info */,
// We will set the document policies later in this function.
nullptr /* document_policies */);
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() &&
request->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() &&
request->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 NavigationRequest. 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 && PendingEntryMatchesRequest(request) &&
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(request->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
request->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, Referrer(*params.referrer),
initiator_origin,
base::string16(), // title
params.transition, request->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(request->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
request->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(Referrer(*params.referrer));
new_entry->SetTransitionType(params.transition);
new_entry->set_site_instance(
static_cast<SiteInstanceImpl*>(rfh->GetSiteInstance()));
new_entry->SetOriginalRequestURL(params.original_request_url);
if (!is_same_document) {
DCHECK_EQ(request->IsOverridingUserAgent() && !rfh->GetParent(),
params.is_overriding_user_agent);
} else {
DCHECK_EQ(rfh->is_overriding_user_agent(), params.is_overriding_user_agent);
}
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);
frame_entry->set_document_policies(
ComputeDocumentPoliciesForFrameEntry(rfh, is_same_document, request));
if (!params.url_is_unreachable)
frame_entry->set_committed_origin(params.origin);
if (request->web_bundle_navigation_info()) {
frame_entry->set_web_bundle_navigation_info(
request->web_bundle_navigation_info()->Clone());
}
// 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) {
DiscardNonCommittedEntries();
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() == request->commit_params().nav_entry_id) {
last_committed_entry_index_ = pending_entry_index_;
}
SetShouldSkipOnBackForwardUIIfNeeded(
replace_entry, previous_document_was_activated,
request->IsRendererInitiated(), request->GetPreviousPageUkmSourceId());
InsertOrReplaceEntry(std::move(new_entry), replace_entry,
!request->post_commit_error_page_html().empty());
}
void NavigationControllerImpl::RendererDidNavigateToExistingPage(
RenderFrameHostImpl* rfh,
const mojom::DidCommitProvisionalLoadParams& params,
bool is_same_document,
bool was_restored,
NavigationRequest* request,
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
// NavigationRequest so don't overwrite the existing entry's SSLStatus.
if (!is_same_document)
entry->GetSSL() =
SSLStatus(request->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
request->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 (const int nav_entry_id = request->commit_params().nav_entry_id) {
// This is a browser-initiated navigation (back/forward/reload).
entry = GetEntryWithUniqueID(nav_entry_id);
if (is_same_document) {
// There's no SSLStatus in the NavigationRequest 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 |request| sometimes won't have a cert
// (http://crbug.com/727892). So we use the request's cert if it exists,
// otherwise we only reuse the existing cert if the origins match.
if (request->GetSSLInfo().has_value() &&
request->GetSSLInfo()->is_valid()) {
entry->GetSSL() = SSLStatus(*(request->GetSSLInfo()));
} else if (entry->GetURL().GetOrigin() != request->GetURL().GetOrigin()) {
entry->GetSSL() = SSLStatus();
}
}
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
request->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
// NavigationRequest so don't overwrite the existing entry's SSLStatus.
if (!is_same_document)
entry->GetSSL() =
SSLStatus(request->GetSSLInfo().value_or(net::SSLInfo()));
if (params.url.SchemeIs(url::kHttpsScheme) && !rfh->GetParent() &&
request->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(Referrer(*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() || !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 =
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),
Referrer(*params.referrer), initiator_origin, params.redirects,
params.page_state, params.method, params.post_id,
nullptr /* blob_url_loader_factory */,
request->web_bundle_navigation_info()
? request->web_bundle_navigation_info()->Clone()
: nullptr,
ComputeDocumentPoliciesForFrameEntry(rfh, is_same_document, request));
// 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)
DiscardNonCommittedEntries();
// Update the last committed index to reflect the committed entry.
last_committed_entry_index_ = GetIndexOfEntry(entry);
}
void NavigationControllerImpl::RendererDidNavigateToSamePage(
RenderFrameHostImpl* rfh,
const mojom::DidCommitProvisionalLoadParams& params,
bool is_same_document,
NavigationRequest* request) {
// 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(),
request->commit_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(request->GetSSLInfo().value_or(net::SSLInfo()));
if (existing_entry->GetURL().SchemeIs(url::kHttpsScheme) &&
!rfh->GetParent() && request->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 =
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),
Referrer(*params.referrer), initiator_origin, params.redirects,
params.page_state, params.method, params.post_id,
nullptr /* blob_url_loader_factory */,
request->web_bundle_navigation_info()
? request->web_bundle_navigation_info()->Clone()
: nullptr,
ComputeDocumentPoliciesForFrameEntry(rfh, is_same_document, request));
DiscardNonCommittedEntries();
}
void NavigationControllerImpl::RendererDidNavigateNewSubframe(
RenderFrameHostImpl* rfh,
const mojom::DidCommitProvisionalLoadParams& params,
bool is_same_document,
bool replace_entry,
bool previous_document_was_activated,
NavigationRequest* request) {
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 =
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,
Referrer(*params.referrer), initiator_origin, params.redirects,
params.page_state, params.method, params.post_id,
nullptr /* blob_url_loader_factory */,
request->web_bundle_navigation_info()
? request->web_bundle_navigation_info()->Clone()
: nullptr,
ComputeDocumentPoliciesForFrameEntry(rfh, is_same_document, request));
std::unique_ptr<NavigationEntryImpl> new_entry =
GetLastCommittedEntry()->CloneAndReplace(
std::move(frame_entry), is_same_document, rfh->frame_tree_node(),
delegate_->GetFrameTree()->root());
SetShouldSkipOnBackForwardUIIfNeeded(
replace_entry, previous_document_was_activated,
request->IsRendererInitiated(), request->GetPreviousPageUkmSourceId());
// 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, false);
}
bool NavigationControllerImpl::RendererDidNavigateAutoSubframe(
RenderFrameHostImpl* rfh,
const mojom::DidCommitProvisionalLoadParams& params,
bool is_same_document,
NavigationRequest* request) {
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 |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 (const int nav_entry_id = request->commit_params().nav_entry_id) {
int entry_index = GetEntryIndexWithUniqueID(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;
DiscardNonCommittedEntries();
// 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 =
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),
Referrer(*params.referrer), initiator_origin, params.redirects,
params.page_state, params.method, params.post_id,
nullptr /* blob_url_loader_factory */,
request->web_bundle_navigation_info()
? request->web_bundle_navigation_info()->Clone()
: nullptr,
ComputeDocumentPoliciesForFrameEntry(rfh, is_same_document, request));
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();
}
auto prefs = rfhi->GetOrCreateWebPreferences();
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_EQ(0, GetEntryCount());
DCHECK(!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::kRestored);
}
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. 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;
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();
}
BackForwardCacheImpl& NavigationControllerImpl::GetBackForwardCache() {
return back_forward_cache_;
}
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;
}
// Ensure any refs to the current pending entry are ignored if they get
// deleted, by clearing the set of known refs. All future pending entries will
// only be affected by new refs.
pending_entry_refs_.clear();
}
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;
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->frame_tree_node()->navigator().Navigate(std::move(request),
ReloadType::NONE);
return true;
}
bool NavigationControllerImpl::ReloadFrame(FrameTreeNode* frame_tree_node) {
NavigationEntryImpl* entry = GetEntryAtIndex(GetCurrentEntryIndex());
if (!entry)
return false;
FrameNavigationEntry* frame_entry = entry->GetFrameEntry(frame_tree_node);
if (!frame_entry)
return false;
ReloadType reload_type = ReloadType::NORMAL;
entry->set_reload_type(reload_type);
std::unique_ptr<NavigationRequest> request = CreateNavigationRequestFromEntry(
frame_tree_node, entry, frame_entry, reload_type,
false /* is_same_document_history_load */,
false /* is_history_navigation_in_new_child */);
if (!request)
return false;
frame_tree_node->navigator().Navigate(std::move(request), reload_type);
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::UnguessableToken* initiator_frame_token,
int initiator_process_id,
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,
const base::Optional<Impression>& impression) {
if (is_renderer_initiated)
DCHECK(initiator_origin.has_value());
FrameTreeNode* node = render_frame_host->frame_tree_node();
// Don't allow an entry replacement if there is no entry to replace.
// http://crbug.com/457149
if (GetEntryCount() == 0)
should_replace_current_entry = false;
// 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,
source_site_instance, page_transition, is_renderer_initiated,
extra_headers, browser_context_,
nullptr /* blob_url_loader_factory */, should_replace_current_entry,
GetWebContents()));
// CreateNavigationEntry() may have changed the transition type.
page_transition = entry->GetTransitionType();
}
std::unique_ptr<PolicyContainerHost::DocumentPolicies> document_policies;
if (GetLastCommittedEntry()) {
FrameNavigationEntry* previous_frame_entry =
GetLastCommittedEntry()->GetFrameEntry(node);
if (previous_frame_entry && previous_frame_entry->document_policies()) {
document_policies =
std::make_unique<PolicyContainerHost::DocumentPolicies>(
*previous_frame_entry->document_policies());
}
}
entry->AddOrUpdateFrameEntry(
node, -1, -1, nullptr,
static_cast<SiteInstanceImpl*>(source_site_instance), url,
base::nullopt /* commit_origin */, referrer, initiator_origin,
std::vector<GURL>(), blink::PageState(), method, -1,
blob_url_loader_factory, nullptr /* web_bundle_navigation_info */,
std::move(document_policies));
} else {
// Main frame case.
entry = NavigationEntryImpl::FromNavigationEntry(CreateNavigationEntry(
url, referrer, initiator_origin, source_site_instance, page_transition,
is_renderer_initiated, extra_headers, browser_context_,
blob_url_loader_factory, should_replace_current_entry,
GetWebContents()));
// CreateNavigationEntry() may have changed the transition type.
page_transition = entry->GetTransitionType();
entry->root_node()->frame_entry->set_source_site_instance(
static_cast<SiteInstanceImpl*>(source_site_instance));
entry->root_node()->frame_entry->set_method(method);
}
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>(),
blink::PageState(), method, -1, blob_url_loader_factory,
nullptr /* web_bundle_navigation_info */,
nullptr /* document_policies */);
}
LoadURLParams params(url);
params.initiator_frame_token =
initiator_frame_token ? base::make_optional(*initiator_frame_token)
: base::nullopt;
params.initiator_process_id = initiator_process_id;
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: skip */
/* 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 */
params.impression = impression;
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(), params.transition_type);
if (!request)
return;
// At this stage we are proceeding with this navigation. If this was renderer
// initiated with user gesture, we need to make sure we clear up potential
// remains of a cancelled browser initiated navigation to avoid URL spoofs.
DiscardNonCommittedEntries();
node->navigator().Navigate(std::move(request), ReloadType::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_);
DiscardNonCommittedEntries();
entries_.erase(entries_.begin() + index);
if (last_committed_entry_index_ > index)
last_committed_entry_index_--;
}
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. An exception is while a reload of a post commit error page
// is ongoing; in that case pending entry will point to the entry replaced
// by the error.
DCHECK(pending_entry_index_ == -1 ||
pending_entry_ == GetEntryAtIndex(pending_entry_index_) ||
pending_entry_ == entry_replaced_by_post_commit_error_.get());
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,
bool was_post_commit_error) {
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());
DiscardNonCommittedEntries();
// When replacing, don't prune the forward history.
if ((replace || was_post_commit_error) && entries_.size() > 0) {
CopyReplacedNavigationEntryDataIfPreviouslyEmpty(
entries_[last_committed_entry_index_].get(), entry.get());
// If the new entry is a post-commit error page, we store the current last
// committed entry to the side so that we can put it back when navigating
// away from the error.
if (was_post_commit_error) {
DCHECK(!entry_replaced_by_post_commit_error_);
entry_replaced_by_post_commit_error_ =
std::move(entries_[last_committed_entry_index_]);
}
entries_[last_committed_entry_index_] = std::move(entry);
return;
}
// We shouldn't see replace == true when there's no committed entries.
DCHECK(!replace);
PruneForwardEntries();
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) {
TRACE_EVENT0("navigation",
"NavigationControllerImpl::NavigateToExistingPendingEntry");
DCHECK(pending_entry_);
DCHECK(IsInitialNavigation() || pending_entry_index_ != -1);
if (pending_entry_index_ != -1) {
// The pending entry may not be in entries_ if a post-commit error page is
// showing.
DCHECK(pending_entry_ == entries_[pending_entry_index_].get() ||
pending_entry_ == entry_replaced_by_post_commit_error_.get());
}
DCHECK(!IsRendererDebugURL(pending_entry_->GetURL()));
bool is_forced_reload = needs_reload_;
needs_reload_ = false;
FrameTreeNode* root = delegate_->GetFrameTree()->root();
int nav_entry_id = pending_entry_->GetUniqueID();
// 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_->IsRestored() &&
pending_entry_->GetTransitionType() & ui::PAGE_TRANSITION_FORWARD_BACK) {
delegate_->Stop();
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;
FindFramesToNavigate(root, reload_type, &same_document_loads,
&different_document_loads);
if (same_document_loads.empty() && different_document_loads.empty()) {
// We were unable to match any frames to navigate. This can happen if a
// history navigation targets a subframe that no longer exists
// (https://crbug.com/705550). In this case, we need to update the current
// history entry to the pending one but keep the main document loaded. We
// also need to ensure that observers are informed about the updated
// current history entry (e.g., for greying out back/forward buttons), and
// that renderer processes update their history offsets. The easiest way
// to do all that is to schedule a "redundant" same-document navigation in
// the main frame.
//
// Note that we don't want to remove this history entry, as it might still
// be valid later, since a frame that it's targeting may be recreated.
//
// TODO(alexmos, creis): This behavior isn't ideal, as the user would
// need to repeat history navigations until finding the one that works.
// Consider changing this behavior to keep looking for the first valid
// history entry that finds frames to navigate.
std::unique_ptr<NavigationRequest> navigation_request =
CreateNavigationRequestFromEntry(
root, pending_entry_, pending_entry_->GetFrameEntry(root),
ReloadType::NONE /* reload_type */,
true /* is_same_document_history_load */,
false /* is_history_navigation_in_new_child */);
if (!navigation_request) {
// If this navigation cannot start, delete the pending NavigationEntry.
DiscardPendingEntry(false);
return;
}
same_document_loads.push_back(std::move(navigation_request));
// Sanity check that we never take this branch for any kinds of reloads,
// as those should've queued a different-document load in the main frame.
DCHECK(!is_forced_reload);
DCHECK_EQ(reload_type, ReloadType::NONE);
}
// 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);
// 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;
}
}
// BackForwardCache:
// Navigate immediately if the document is in the BackForwardCache.
if (back_forward_cache_.GetEntry(nav_entry_id)) {
TRACE_EVENT0("navigation", "BackForwardCache_CreateNavigationRequest");
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);
return;
}
// History navigation might try to reuse a specific BrowsingInstance, already
// used by a page in the cache. To avoid having two different main frames that
// live in the same BrowsingInstance, evict the all pages with this
// BrowsingInstance from the cache.
//
// For example, take the following scenario:
//
// A1 = Some page on a.com
// A2 = Some other page on a.com
// B3 = An uncacheable page on b.com
//
// Then the following navigations occur:
// A1->A2->B3->A1
// On the navigation from B3 to A1, A2 will remain in the cache (B3 doesn't
// take its place) and A1 will be created in the same BrowsingInstance (and
// SiteInstance), as A2.
//
// If we didn't do anything, both A1 and A2 would remain alive in the same
// BrowsingInstance/SiteInstance, which is unsupported by
// RenderFrameHostManager::CommitPending(). To avoid this conundrum, we evict
// A2 from the cache.
if (pending_entry_->site_instance()) {
back_forward_cache_.EvictFramesInRelatedSiteInstances(
pending_entry_->site_instance());
}
// This call does not support re-entrancy. See http://crbug.com/347742.
CHECK(!in_navigate_to_pending_entry_);
in_navigate_to_pending_entry_ = true;
// It is not possible to delete the pending NavigationEntry while navigating
// to it. Grab a reference to delay potential deletion until the end of this
// function.
std::unique_ptr<PendingEntryRef> pending_entry_ref = ReferencePendingEntry();
// 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);
}
for (auto& item : different_document_loads) {
FrameTreeNode* frame = item->frame_tree_node();
frame->navigator().Navigate(std::move(item), reload_type);
}
in_navigate_to_pending_entry_ = false;
}
NavigationControllerImpl::HistoryNavigationAction
NavigationControllerImpl::DetermineActionForHistoryNavigation(
FrameTreeNode* frame,
ReloadType reload_type) {
// Only active frames can navigate:
// - If the frame is in pending deletion, the browser already committed to
// destroying this RenderFrameHost. See https://crbug.com/930278.
// - If the frame is in back-forward cache, it's not allowed to navigate as it
// should remain frozen. Ignore the request and evict the document from
// back-forward cache.
//
// If the frame is inactive, there's no need to recurse into subframes, which
// should all be inactive as well.
if (frame->current_frame_host()->IsInactiveAndDisallowReactivation())
return HistoryNavigationAction::kStopLooking;
// If there's no last committed entry, there is no previous history entry to
// compare against, so fall back to a different-document load. Note that we
// should only reach this case for the root frame and not descend further
// into subframes.
if (!GetLastCommittedEntry()) {
DCHECK(frame->IsMainFrame());
return HistoryNavigationAction::kDifferentDocument;
}
// Reloads should result in a different-document load. Note that reloads may
// also happen via the |needs_reload_| mechanism where the reload_type is
// NONE, so detect this by comparing whether we're going to the same
// entry that we're currently on. Similarly to above, only main frames
// should reach this. Note that subframes support reloads, but that's done
// via a different path that doesn't involve FindFramesToNavigate (see
// RenderFrameHost::Reload()).
if (reload_type != ReloadType::NONE ||
pending_entry_index_ == last_committed_entry_index_) {
DCHECK(frame->IsMainFrame());
return HistoryNavigationAction::kDifferentDocument;
}
// If there is no new FrameNavigationEntry for the frame, ignore the
// load. For example, this may happen when going back to an entry before a
// frame was created. Suppose we commit a same-document navigation that also
// results in adding a new subframe somewhere in the tree. If we go back,
// the new subframe will be missing a FrameNavigationEntry in the previous
// NavigationEntry, but we shouldn't delete or change what's loaded in
// it.
//
// Note that in this case, there is no need to keep looking for navigations
// in subframes, which would be missing FrameNavigationEntries as well.
//
// It's important to check this before checking |old_item| below, since both
// might be null, and in that case we still shouldn't change what's loaded in
// this frame. Note that scheduling any loads assumes that |new_item| is
// non-null. See https://crbug.com/1088354.
FrameNavigationEntry* new_item = pending_entry_->GetFrameEntry(frame);
if (!new_item)
return HistoryNavigationAction::kStopLooking;
// If there is no old FrameNavigationEntry, schedule a different-document
// load.
//
// TODO(creis): Store the last committed FrameNavigationEntry to use here,
// rather than assuming the NavigationEntry has up to date info on subframes.
// Note that this may require sharing FrameNavigationEntries between
// NavigationEntries (https://crbug.com/373041) as a prerequisite, since
// otherwise the stored FrameNavigationEntry might get stale (e.g., after
// subframe navigations, or in the case where we don't find any frames to
// navigate and ignore a back/forward navigation while moving to a different
// NavigationEntry, as in https://crbug.com/705550).
FrameNavigationEntry* old_item =
GetLastCommittedEntry()->GetFrameEntry(frame);
if (!old_item)
return HistoryNavigationAction::kDifferentDocument;
// If the new item is not in the same SiteInstance, schedule a
// different-document load. Newly restored items may not have a SiteInstance
// yet, in which case it will be assigned on first commit.
if (new_item->site_instance() &&
new_item->site_instance() != old_item->site_instance())
return HistoryNavigationAction::kDifferentDocument;
// Schedule a different-document load if the current RenderFrameHost is not
// live. This case can happen for Ctrl+Back or after
// a renderer crash.
if (!frame->current_frame_host()->IsRenderFrameLive())
return HistoryNavigationAction::kDifferentDocument;
if (new_item->item_sequence_number() != old_item->item_sequence_number()) {
// Same document loads happen if the previous item has the same document
// sequence number but different item sequence number. If the current
// document is an error page, though, we should always treat it as a
// different-document navigation so that we'll attempt to load the document
// for |new_item| (and not stay in the current error page).
if (!frame->current_frame_host()->is_error_page() &&
new_item->document_sequence_number() ==
old_item->document_sequence_number())
return HistoryNavigationAction::kSameDocument;
// Otherwise, if both item and document sequence numbers differ, this
// should be a different document load.
return HistoryNavigationAction::kDifferentDocument;
}
// If the item sequence numbers match, there is no need to navigate this
// frame. Keep looking for navigations in this frame's children.
DCHECK_EQ(new_item->document_sequence_number(),
old_item->document_sequence_number());
return HistoryNavigationAction::kKeepLooking;
}
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) {
DCHECK(pending_entry_);
FrameNavigationEntry* new_item = pending_entry_->GetFrameEntry(frame);
auto action = DetermineActionForHistoryNavigation(frame, reload_type);
if (action == HistoryNavigationAction::kSameDocument) {
std::unique_ptr<NavigationRequest> navigation_request =
CreateNavigationRequestFromEntry(
frame, pending_entry_, new_item, reload_type,
true /* is_same_document_history_load */,
false /* is_history_navigation_in_new_child */);
if (navigation_request) {
// Only add the request if was properly created. It's possible for the
// creation to fail in certain cases, e.g. when the URL is invalid.
same_document_loads->push_back(std::move(navigation_request));
}
// TODO(avi, creis): This is a bug; we should not return here. Rather, we
// should continue on and navigate all child frames which have also
// changed. This bug is the cause of <https://crbug.com/542299>, which is
// a NC_IN_PAGE_NAVIGATION renderer kill.
//
// However, this bug is a bandaid over a deeper and worse problem. Doing a
// pushState immediately after loading a subframe is a race, one that no
// web page author expects. If we fix this bug, many large websites break.
// For example, see <https://crbug.com/598043> and the spec discussion at
// <https://github.com/whatwg/html/issues/1191>.
//
// For now, we accept this bug, and hope to resolve the race in a
// different way that will one day allow us to fix this.
return;
} else if (action == HistoryNavigationAction::kDifferentDocument) {
std::unique_ptr<NavigationRequest> navigation_request =
CreateNavigationRequestFromEntry(
frame, pending_entry_, new_item, reload_type,
false /* is_same_document_history_load */,
false /* is_history_navigation_in_new_child */);
if (navigation_request) {
// Only add the request if was properly created. It's possible for the
// creation to fail in certain cases, e.g. when the URL is invalid.
different_document_loads->push_back(std::move(navigation_request));
}
// For a different document, the subframes will be destroyed, so there's
// no need to consider them.
return;
} else if (action == HistoryNavigationAction::kStopLooking) {
return;
}
for (size_t i = 0; i < frame->child_count(); i++) {
FindFramesToNavigate(frame->child_at(i), reload_type, same_document_loads,
different_document_loads);
}
}
void NavigationControllerImpl::NavigateWithoutEntry(
const LoadURLParams& params) {
// Find the appropriate FrameTreeNode.
FrameTreeNode* node = nullptr;
if (params.frame_tree_node_id != RenderFrameHost::kNoFrameTreeNodeId ||
!params.frame_name.empty()) {
node = params.frame_tree_node_id != RenderFrameHost::kNoFrameTreeNodeId
? delegate_->GetFrameTree()->FindByID(params.frame_tree_node_id)
: delegate_->GetFrameTree()->FindByName(params.frame_name);
}
// If no FrameTreeNode was specified, navigate the main frame.
if (!node)
node = delegate_->GetFrameTree()->root();
// Compute overrides to the LoadURLParams for |override_user_agent|,
// |should_replace_current_entry| and |has_user_gesture| that will be used
// both in the creation of the NavigationEntry and the NavigationRequest.
// Ideally, the LoadURLParams themselves would be updated, but since they are
// passed as a const reference, this is not possible.
// TODO(clamy): When we only create a NavigationRequest, move this to
// CreateNavigationRequestFromLoadURLParams.
bool override_user_agent = ShouldOverrideUserAgent(params.override_user_agent,
GetLastCommittedEntry());
// Don't allow an entry replacement if there is no entry to replace.
// http://crbug.com/457149
bool should_replace_current_entry =
params.should_replace_current_entry && entries_.size();
ui::PageTransition transition_type = params.transition_type;
// Javascript URLs should not create NavigationEntries. All other navigations
// do, including navigations to chrome renderer debug URLs.
if (!params.url.SchemeIs(url::kJavaScriptScheme)) {
std::unique_ptr<NavigationEntryImpl> entry =
CreateNavigationEntryFromLoadParams(node, params, override_user_agent,
should_replace_current_entry,
params.has_user_gesture);
// CreateNavigationEntryFromLoadParams() may modify the transition type.
transition_type = entry->GetTransitionType();
DiscardPendingEntry(false);
SetPendingEntry(std::move(entry));
}
// Renderer-debug URLs are sent to the renderer process immediately for
// processing and don't need to create a NavigationRequest.
// Note: this includes navigations to JavaScript URLs, which are considered
// renderer-debug URLs.
// Note: we intentionally leave the pending entry in place for renderer debug
// URLs, unlike the cases below where we clear it if the navigation doesn't
// proceed.
if (IsRendererDebugURL(params.url)) {
// Renderer-debug URLs won't go through NavigationThrottlers so we have to
// check them explicitly. See bug 913334.
if (GetContentClient()->browser()->ShouldBlockRendererDebugURL(
params.url, browser_context_)) {
DiscardPendingEntry(false);
return;
}
HandleRendererDebugURL(node, params.url);
return;
}
DCHECK(pending_entry_);
// Convert navigations to the current URL to a reload.
// TODO(clamy): We should be using FrameTreeNode::IsMainFrame here instead of
// relying on the frame tree node id from LoadURLParams. Unfortunately,
// DevTools sometimes issues navigations to main frames that they do not
// expect to see treated as reload, and it only works because they pass a
// FrameTreeNode id in their LoadURLParams. Change this once they no longer do
// that. See https://crbug.com/850926.
ReloadType reload_type = params.reload_type;
if (reload_type == ReloadType::NONE &&
ShouldTreatNavigationAsReload(
node, params.url, pending_entry_->GetVirtualURL(),
params.base_url_for_data_url, params.transition_type,
params.load_type ==
NavigationController::LOAD_TYPE_HTTP_POST /* is_post */,
false /* is_reload */, false /* is_navigation_to_existing_entry */,
GetLastCommittedEntry())) {
reload_type = ReloadType::NORMAL;
pending_entry_->set_reload_type(reload_type);
// If this is a reload of an existing FrameNavigationEntry and we had a
// policy container for it, then we should copy it into the pending entry,
// so that it is copied to the navigation request in
// CreateNavigationRequestFromLoadParams later.
if (GetLastCommittedEntry()) {
FrameNavigationEntry* previous_frame_entry =
GetLastCommittedEntry()->GetFrameEntry(node);
if (previous_frame_entry && previous_frame_entry->document_policies()) {
pending_entry_->GetFrameEntry(node)->set_document_policies(
std::make_unique<PolicyContainerHost::DocumentPolicies>(
*previous_frame_entry->document_policies()));
}
}
}
// If this navigation is an "Enter-in-omnibox" with the initial about:blank
// document (so no last commit), then we should copy the document polices from
// RenderFrameHost's PolicyContainerHost. The NavigationRequest will create a
// new PolicyContainerHost with the document policies from the
// |pending_entry_|, and that PolicyContainerHost will be put in the final
// RenderFrameHost for the navigation. This way, we ensure that we keep
// enforcing the right policies on the initial empty document after the
// reload.
if (!GetLastCommittedEntry() && params.url.IsAboutBlank()) {
if (node->current_frame_host() &&
node->current_frame_host()->policy_container_host()) {
pending_entry_->GetFrameEntry(node)->set_document_policies(
std::make_unique<PolicyContainerHost::DocumentPolicies>(
node->current_frame_host()
->policy_container_host()
->document_policies()));
}
}
// navigation_ui_data should only be present for main frame navigations.
DCHECK(node->IsMainFrame() || !params.navigation_ui_data);
std::unique_ptr<NavigationRequest> request =
CreateNavigationRequestFromLoadParams(
node, params, override_user_agent, should_replace_current_entry,
params.has_user_gesture, NavigationDownloadPolicy(), reload_type,
pending_entry_, pending_entry_->GetFrameEntry(node), transition_type);
// If the navigation couldn't start, return immediately and discard the
// pending NavigationEntry.
if (!request) {
DiscardPendingEntry(false);
return;
}
#if DCHECK_IS_ON()
// Safety check that NavigationRequest and NavigationEntry match.
ValidateRequestMatchesEntry(request.get(), pending_entry_);
#endif
// This call does not support re-entrancy. See http://crbug.com/347742.
CHECK(!in_navigate_to_pending_entry_);
in_navigate_to_pending_entry_ = true;
// It is not possible to delete the pending NavigationEntry while navigating
// to it. Grab a reference to delay potential deletion until the end of this
// function.
std::unique_ptr<PendingEntryRef> pending_entry_ref = ReferencePendingEntry();
node->navigator().Navigate(std::move(request), reload_type);
in_navigate_to_pending_entry_ = false;
}
void NavigationControllerImpl::HandleRendererDebugURL(
FrameTreeNode* frame_tree_node,
const GURL& url) {
if (!frame_tree_node->current_frame_host()->IsRenderFrameLive()) {
// Any renderer-side debug URLs or javascript: URLs should be ignored if
// the renderer process is not live, unless it is the initial navigation
// of the tab.
if (!IsInitialNavigation()) {
DiscardNonCommittedEntries();
return;
}
// The current frame is always a main frame. If IsInitialNavigation() is
// true then there have been no navigations and any frames of this tab must
// be in the same renderer process. If that has crashed then the only frame
// that can be revived is the main frame.
frame_tree_node->render_manager()
->InitializeMainRenderFrameForImmediateUse();
}
frame_tree_node->current_frame_host()->HandleRendererDebugURL(url);
}
std::unique_ptr<NavigationEntryImpl>
NavigationControllerImpl::CreateNavigationEntryFromLoadParams(
FrameTreeNode* node,
const LoadURLParams& params,
bool override_user_agent,
bool should_replace_current_entry,
bool has_user_gesture) {
// Browser initiated navigations might not have a blob_url_loader_factory set
// in params even if the navigation is to a blob URL. If that happens, lookup
// the correct url loader factory to use here.
auto blob_url_loader_factory = params.blob_url_loader_factory;
if (!blob_url_loader_factory && params.url.SchemeIsBlob()) {
// Resolve the blob URL in the storage partition associated with the target
// frame. This is the storage partition the URL will be loaded in, and only
// URLs that can be resolved by it should be able to access its data.
blob_url_loader_factory = ChromeBlobStorageContext::URLLoaderFactoryForUrl(
node->current_frame_host()->GetStoragePartition(), params.url);
}
std::unique_ptr<NavigationEntryImpl> entry;
// extra_headers in params are \n separated; navigation entries want \r\n.
std::string extra_headers_crlf;
base::ReplaceChars(params.extra_headers, "\n", "\r\n", &extra_headers_crlf);
// For subframes, create a pending entry with a corresponding frame entry.
if (!node->IsMainFrame()) {
if (GetLastCommittedEntry()) {
// Create an identical NavigationEntry with a new FrameNavigationEntry for
// the target subframe.
entry = GetLastCommittedEntry()->Clone();
} 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), params.referrer, params.initiator_origin,
params.source_site_instance.get(), params.transition_type,
params.is_renderer_initiated, extra_headers_crlf, browser_context_,
blob_url_loader_factory, should_replace_current_entry,
GetWebContents()));
}
entry->AddOrUpdateFrameEntry(
node, -1, -1, nullptr,
static_cast<SiteInstanceImpl*>(params.source_site_instance.get()),
params.url, base::nullopt, params.referrer, params.initiator_origin,
params.redirect_chain, blink::PageState(), "GET", -1,
blob_url_loader_factory, nullptr /* web_bundle_navigation_info */,
// If in NavigateWithoutEntry we later determine that this navigation is
// a SAME_PAGE conversion of a new navigation into a reload, we will set
// the right document policies there.
nullptr /* document_policies */);
} else {
// Otherwise, create a pending entry for the main frame.
entry = NavigationEntryImpl::FromNavigationEntry(CreateNavigationEntry(
params.url, params.referrer, params.initiator_origin,
params.source_site_instance.get(), params.transition_type,
params.is_renderer_initiated, extra_headers_crlf, browser_context_,
blob_url_loader_factory, should_replace_current_entry,
GetWebContents()));
entry->set_source_site_instance(
static_cast<SiteInstanceImpl*>(params.source_site_instance.get()));
entry->SetRedirectChain(params.redirect_chain);
}
// Set the FTN ID (only used in non-site-per-process, for tests).
entry->set_frame_tree_node_id(node->frame_tree_node_id());
entry->set_should_clear_history_list(params.should_clear_history_list);
entry->SetIsOverridingUserAgent(override_user_agent);
entry->set_has_user_gesture(has_user_gesture);
entry->set_reload_type(params.reload_type);
switch (params.load_type) {
case LOAD_TYPE_DEFAULT:
break;
case LOAD_TYPE_HTTP_POST:
entry->SetHasPostData(true);
entry->SetPostData(params.post_data);
break;
case LOAD_TYPE_DATA:
entry->SetBaseURLForDataURL(params.base_url_for_data_url);
entry->SetVirtualURL(params.virtual_url_for_data_url);
#if defined(OS_ANDROID)
entry->SetDataURLAsString(params.data_url_as_string);
#endif
entry->SetCanLoadLocalResources(params.can_load_local_resources);
break;
}
// TODO(clamy): NavigationEntry is meant for information that will be kept
// after the navigation ended and therefore is not appropriate for
// started_from_context_menu. Move started_from_context_menu to
// NavigationUIData.
entry->set_started_from_context_menu(params.started_from_context_menu);
return entry;
}
std::unique_ptr<NavigationRequest>
NavigationControllerImpl::CreateNavigationRequestFromLoadParams(
FrameTreeNode* node,
const LoadURLParams& params,
bool override_user_agent,
bool should_replace_current_entry,
bool has_user_gesture,
NavigationDownloadPolicy download_policy,
ReloadType reload_type,
NavigationEntryImpl* entry,
FrameNavigationEntry* frame_entry,
ui::PageTransition transition_type) {
DCHECK_EQ(-1, GetIndexOfEntry(entry));
DCHECK(frame_entry);
// All renderer-initiated navigations must have an initiator_origin.
DCHECK(!params.is_renderer_initiated || params.initiator_origin.has_value());
GURL url_to_load;
GURL virtual_url;
base::Optional<url::Origin> origin_to_commit =
frame_entry ? frame_entry->committed_origin() : base::nullopt;
// For main frames, rewrite the URL if necessary and compute the virtual URL
// that should be shown in the address bar.
if (node->IsMainFrame()) {
bool ignored_reverse_on_redirect = false;
RewriteUrlForNavigation(params.url, browser_context_, &url_to_load,
&virtual_url, &ignored_reverse_on_redirect);
// For DATA loads, override the virtual URL.
if (params.load_type == LOAD_TYPE_DATA)
virtual_url = params.virtual_url_for_data_url;
if (virtual_url.is_empty())
virtual_url = url_to_load;
CHECK(virtual_url == entry->GetVirtualURL());
// This is a LOG and not a CHECK/DCHECK as URL rewrite has non-deterministic
// behavior: it is possible for two calls to RewriteUrlForNavigation to
// return different results, leading to a different URL in the
// NavigationRequest and FrameEntry. This will be fixed once we remove the
// pending NavigationEntry, as we'll only make one call to
// RewriteUrlForNavigation.
VLOG_IF(1, (url_to_load != frame_entry->url()))
<< "NavigationRequest and FrameEntry have different URLs: "
<< url_to_load << " vs " << frame_entry->url();
// TODO(clamy): In order to remove the pending NavigationEntry,
// |virtual_url| and |ignored_reverse_on_redirect| should be stored in the
// NavigationRequest.
} else {
url_to_load = params.url;
virtual_url = params.url;
CHECK(!frame_entry || url_to_load == frame_entry->url());
}
if (node->render_manager()->is_attaching_inner_delegate()) {
// Avoid starting any new navigations since this node is now preparing for
// attaching an inner delegate.
return nullptr;
}
if (!IsValidURLForNavigation(node->IsMainFrame(), virtual_url, url_to_load))
return nullptr;
if (!DoesURLMatchOriginForNavigation(url_to_load, origin_to_commit)) {
DCHECK(false) << " url:" << url_to_load
<< " origin:" << origin_to_commit.value();
return nullptr;
}
// Determine if Previews should be used for the navigation.
blink::PreviewsState previews_state =
blink::PreviewsTypes::PREVIEWS_UNSPECIFIED;
if (!node->IsMainFrame()) {
// For subframes, use the state of the top-level frame.
previews_state = node->frame_tree()
->root()
->current_frame_host()
->last_navigation_previews_state();
}
// This will be used to set the Navigation Timing API navigationStart
// parameter for browser navigations in new tabs (intents, tabs opened through
// "Open link in new tab"). If the navigation must wait on the current
// RenderFrameHost to execute its BeforeUnload event, the navigation start
// will be updated when the BeforeUnload ack is received.
base::TimeTicks navigation_start = base::TimeTicks::Now();
// Look for a pending commit that is to another document in this
// FrameTreeNode. If one exists, then the last committed URL will not be the
// current URL by the time this navigation commits.
bool has_pending_cross_document_commit =
node->render_manager()->HasPendingCommitForCrossDocumentNavigation();
mojom::NavigationType navigation_type =
GetNavigationType(/*old_url=*/node->current_url(),
/*new_url=*/url_to_load, reload_type, entry,
*frame_entry, has_pending_cross_document_commit,
/*is_same_document_history_load=*/false);
// Create the NavigationParams based on |params|.
bool is_view_source_mode = virtual_url.SchemeIs(kViewSourceScheme);
// Update |download_policy| if the virtual URL is view-source. Why do this
// now? Possibly the URL could be rewritten to a view-source via some URL
// handler.
if (is_view_source_mode)
download_policy.SetDisallowed(NavigationDownloadType::kViewSource);
const GURL& history_url_for_data_url =
params.base_url_for_data_url.is_empty() ? GURL() : virtual_url;
// Don't use |params.transition_type| as calling code may supply a different
// value.
mojom::CommonNavigationParamsPtr common_params =
mojom::CommonNavigationParams::New(
url_to_load, params.initiator_origin,
blink::mojom::Referrer::New(params.referrer.url,
params.referrer.policy),
transition_type, navigation_type, download_policy,
should_replace_current_entry, params.base_url_for_data_url,
history_url_for_data_url, previews_state, navigation_start,
params.load_type == LOAD_TYPE_HTTP_POST ? "POST" : "GET",
params.post_data, network::mojom::SourceLocation::New(),
params.started_from_context_menu, has_user_gesture,
false /* has_text_fragment_token */, CreateInitiatorCSPInfo(),
std::vector<int>(), params.href_translate,
false /* is_history_navigation_in_new_child_frame */,
params.input_start);
mojom::CommitNavigationParamsPtr commit_params =
mojom::CommitNavigationParams::New(
frame_entry->committed_origin(), override_user_agent,
params.redirect_chain,
std::vector<network::mojom::URLResponseHeadPtr>(),
std::vector<net::RedirectInfo>(),
std::string() /* post_content_type */, common_params->url,
common_params->method, params.can_load_local_resources,
frame_entry->page_state(), entry->GetUniqueID(),
entry->GetSubframeUniqueNames(node), true /* intended_as_new_entry */,
-1 /* pending_history_list_offset */,
params.should_clear_history_list ? -1 : GetLastCommittedEntryIndex(),
params.should_clear_history_list ? 0 : GetEntryCount(),
false /* was_discarded */, is_view_source_mode,
params.should_clear_history_list, mojom::NavigationTiming::New(),
base::nullopt /* appcache_host_id */,
mojom::WasActivatedOption::kUnknown,
base::UnguessableToken::Create() /* navigation_token */,
std::vector<mojom::PrefetchedSignedExchangeInfoPtr>(),
#if defined(OS_ANDROID)
std::string(), /* data_url_as_string */
#endif
!params.is_renderer_initiated, /* is_browser_initiated */
network::mojom::IPAddressSpace::kUnknown,
GURL() /* web_bundle_physical_url */,
GURL() /* base_url_override_for_web_bundle */,
ukm::kInvalidSourceId /* document_ukm_source_id */,
node->pending_frame_policy(),
std::vector<std::string>() /* force_enabled_origin_trials */,
false /* origin_isolated */,
std::vector<
network::mojom::WebClientHintsType>() /* enabled_client_hints */,
false /* is_cross_browsing_instance */,
std::vector<std::string>() /* forced_content_security_policies */,
nullptr /* old_page_info */, -1 /* http_response_code */);
#if defined(OS_ANDROID)
if (ValidateDataURLAsString(params.data_url_as_string)) {
commit_params->data_url_as_string = params.data_url_as_string->data();
}
#endif
commit_params->was_activated = params.was_activated;
// A form submission may happen here if the navigation is a renderer-initiated
// form submission that took the OpenURL path.
scoped_refptr<network::ResourceRequestBody> request_body = params.post_data;
// extra_headers in params are \n separated; NavigationRequests want \r\n.
std::string extra_headers_crlf;
base::ReplaceChars(params.extra_headers, "\n", "\r\n", &extra_headers_crlf);
auto navigation_request = NavigationRequest::CreateBrowserInitiated(
node, std::move(common_params), std::move(commit_params),
!params.is_renderer_initiated,
params.initiator_frame_token.has_value()
? &(params.initiator_frame_token.value())
: nullptr,
params.initiator_process_id, extra_headers_crlf, frame_entry, entry,
request_body,
params.navigation_ui_data ? params.navigation_ui_data->Clone() : nullptr,
params.impression);
navigation_request->set_from_download_cross_origin_redirect(
params.from_download_cross_origin_redirect);
return navigation_request;
}
std::unique_ptr<NavigationRequest>
NavigationControllerImpl::CreateNavigationRequestFromEntry(
FrameTreeNode* frame_tree_node,
NavigationEntryImpl* entry,
FrameNavigationEntry* frame_entry,
ReloadType reload_type,
bool is_same_document_history_load,
bool is_history_navigation_in_new_child_frame) {
DCHECK(frame_entry);
GURL dest_url = frame_entry->url();
base::Optional<url::Origin> origin_to_commit =
frame_entry->committed_origin();
Referrer dest_referrer = frame_entry->referrer();
if (reload_type == ReloadType::ORIGINAL_REQUEST_URL &&
entry->GetOriginalRequestURL().is_valid() && !entry->GetHasPostData()) {
// We may have been redirected when navigating to the current URL.
// Use the URL the user originally intended to visit as signaled by the
// ReloadType, if it's valid and if a POST wasn't involved; the latter
// case avoids issues with sending data to the wrong page.
dest_url = entry->GetOriginalRequestURL();
dest_referrer = Referrer();
origin_to_commit.reset();
}
if (frame_tree_node->render_manager()->is_attaching_inner_delegate()) {
// Avoid starting any new navigations since this node is now preparing for
// attaching an inner delegate.
return nullptr;
}
if (!IsValidURLForNavigation(frame_tree_node->IsMainFrame(),
entry->GetVirtualURL(), dest_url)) {
return nullptr;
}
if (!DoesURLMatchOriginForNavigation(dest_url, origin_to_commit)) {
DCHECK(false) << " url:" << dest_url
<< " origin:" << origin_to_commit.value();
return nullptr;
}
// Determine if Previews should be used for the navigation.
blink::PreviewsState previews_state =
blink::PreviewsTypes::PREVIEWS_UNSPECIFIED;
if (!frame_tree_node->IsMainFrame()) {
// For subframes, use the state of the top-level frame.
previews_state = frame_tree_node->frame_tree()
->root()
->current_frame_host()
->last_navigation_previews_state();
}
// This will be used to set the Navigation Timing API navigationStart
// parameter for browser navigations in new tabs (intents, tabs opened through
// "Open link in new tab"). If the navigation must wait on the current
// RenderFrameHost to execute its BeforeUnload event, the navigation start
// will be updated when the BeforeUnload ack is received.
base::TimeTicks navigation_start = base::TimeTicks::Now();
// Look for a pending commit that is to another document in this
// FrameTreeNode. If one exists, then the last committed URL will not be the
// current URL by the time this navigation commits.
bool has_pending_cross_document_commit =
frame_tree_node->render_manager()
->HasPendingCommitForCrossDocumentNavigation();
mojom::NavigationType navigation_type = GetNavigationType(
/*old_url=*/frame_tree_node->current_url(),
/*new_url=*/dest_url, reload_type, entry, *frame_entry,
has_pending_cross_document_commit, is_same_document_history_load);
// A form submission may happen here if the navigation is a
// back/forward/reload navigation that does a form resubmission.
scoped_refptr<network::ResourceRequestBody> request_body;
std::string post_content_type;
if (frame_entry->method() == "POST") {
request_body = frame_entry->GetPostData(&post_content_type);
// Might have a LF at end.
post_content_type =
base::TrimWhitespaceASCII(post_content_type, base::TRIM_ALL)
.as_string();
}
// Create the NavigationParams based on |entry| and |frame_entry|.
mojom::CommonNavigationParamsPtr common_params =
entry->ConstructCommonNavigationParams(
*frame_entry, request_body, dest_url,
blink::mojom::Referrer::New(dest_referrer.url, dest_referrer.policy),
navigation_type, previews_state, navigation_start,
base::TimeTicks() /* input_start */);
common_params->is_history_navigation_in_new_child_frame =
is_history_navigation_in_new_child_frame;
// TODO(clamy): |intended_as_new_entry| below should always be false once
// Reload no longer leads to this being called for a pending NavigationEntry
// of index -1.
mojom::CommitNavigationParamsPtr commit_params =
entry->ConstructCommitNavigationParams(
*frame_entry, common_params->url, origin_to_commit,
common_params->method, entry->GetSubframeUniqueNames(frame_tree_node),
GetPendingEntryIndex() == -1 /* intended_as_new_entry */,
GetIndexOfEntry(entry), GetLastCommittedEntryIndex(), GetEntryCount(),
frame_tree_node->pending_frame_policy());
commit_params->post_content_type = post_content_type;
return NavigationRequest::CreateBrowserInitiated(
frame_tree_node, std::move(common_params), std::move(commit_params),
!entry->is_renderer_initiated(), nullptr /* initiator_frame_token */,
ChildProcessHost::kInvalidUniqueID /* initiator_process_id */,
entry->extra_headers(), frame_entry, entry, request_body,
nullptr /* navigation_ui_data */, base::nullopt /* impression */);
}
void NavigationControllerImpl::NotifyNavigationEntryCommitted(
LoadCommittedDetails* details) {
details->entry = GetLastCommittedEntry();
// We need to notify the ssl_manager_ before the web_contents_ so the
// location bar will have up-to-date information about the security style
// when it wants to draw. See http://crbug.com/11157
ssl_manager_.DidCommitProvisionalLoad(*details);
delegate_->NotifyNavigationStateChanged(INVALIDATE_TYPE_ALL);
delegate_->NotifyNavigationEntryCommitted(*details);
// TODO(avi): Remove. http://crbug.com/170921
NotificationDetails notification_details =
Details<LoadCommittedDetails>(details);
NotificationService::current()->Notify(NOTIFICATION_NAV_ENTRY_COMMITTED,
Source<NavigationController>(this),
notification_details);
}
// static
size_t NavigationControllerImpl::max_entry_count() {
if (max_entry_count_for_testing_ != kMaxEntryCountForTestingNotSet)
return max_entry_count_for_testing_;
return kMaxSessionHistoryEntries;
}
void NavigationControllerImpl::SetActive(bool is_active) {
if (is_active && needs_reload_)
LoadIfNecessary();
}
void NavigationControllerImpl::LoadIfNecessary() {
if (!needs_reload_)
return;
UMA_HISTOGRAM_ENUMERATION("Navigation.LoadIfNecessaryType",
needs_reload_type_);
// Calling Reload() results in ignoring state, and not loading.
// Explicitly use NavigateToPendingEntry so that the renderer uses the
// cached state.
if (pending_entry_) {
NavigateToExistingPendingEntry(ReloadType::NONE,
FrameTreeNode::kFrameTreeNodeInvalidId);
} else if (last_committed_entry_index_ != -1) {
pending_entry_ = entries_[last_committed_entry_index_].get();
pending_entry_index_ = last_committed_entry_index_;
NavigateToExistingPendingEntry(ReloadType::NONE,
FrameTreeNode::kFrameTreeNodeInvalidId);
} else {
// If there is something to reload, the successful reload will clear the
// |needs_reload_| flag. Otherwise, just do it here.
needs_reload_ = false;
}
}
void NavigationControllerImpl::LoadPostCommitErrorPage(
RenderFrameHost* render_frame_host,
const GURL& url,
const std::string& error_page_html,
net::Error error) {
// Only active frames can load post-commit error pages:
// - If the frame is in pending deletion, the browser already committed to
// destroying this RenderFrameHost so ignore loading the error page.
// - If the frame is in back-forward cache, it's not allowed to navigate as it
// should remain frozen. Ignore the request and evict the document from
// back-forward cache.
if (static_cast<RenderFrameHostImpl*>(render_frame_host)
->IsInactiveAndDisallowReactivation()) {
return;
}
RenderFrameHostImpl* rfhi =
static_cast<RenderFrameHostImpl*>(render_frame_host);
FrameTreeNode* node = rfhi->frame_tree_node();
mojom::CommonNavigationParamsPtr common_params =
CreateCommonNavigationParams();
// |url| might be empty, such as when LoadPostCommitErrorPage happens before
// the frame actually committed (e.g. iframe with "src" set to a
// slow-responding URL). We should rewrite the URL to about:blank in this
// case, as the renderer will only think a page is an error page if it has a
// non-empty unreachable URL.
common_params->url = url.is_empty() ? GURL("about:blank") : url;
mojom::CommitNavigationParamsPtr commit_params =
CreateCommitNavigationParams();
// Error pages have a fully permissive FramePolicy.
// TODO(arthursonzogni): Consider providing the minimal capabilities to the
// error pages.
commit_params->frame_policy = blink::FramePolicy();
std::unique_ptr<NavigationRequest> navigation_request =
NavigationRequest::CreateBrowserInitiated(
node, std::move(common_params), std::move(commit_params),
true /* browser_initiated */, nullptr /* initiator_frame_token */,
ChildProcessHost::kInvalidUniqueID /* initiator_process_id */,
"" /* extra_headers */, nullptr /* frame_entry */,
nullptr /* entry */, nullptr /* post_body */,
nullptr /* navigation_ui_data */, base::nullopt /* impression */);
navigation_request->set_post_commit_error_page_html(error_page_html);
navigation_request->set_net_error(error);
node->CreatedNavigationRequest(std::move(navigation_request));
DCHECK(node->navigation_request());
node->navigation_request()->BeginNavigation();
}
void NavigationControllerImpl::NotifyEntryChanged(NavigationEntry* entry) {
EntryChangedDetails det;
det.changed_entry = entry;
det.index = GetIndexOfEntry(NavigationEntryImpl::FromNavigationEntry(entry));
delegate_->NotifyNavigationEntryChanged(det);
}
void NavigationControllerImpl::FinishRestore(int selected_index,
RestoreType type) {
DCHECK(selected_index >= 0 && selected_index < GetEntryCount());
ConfigureEntriesForRestore(&entries_, type);
last_committed_entry_index_ = selected_index;
}
void NavigationControllerImpl::DiscardNonCommittedEntries() {
// Avoid sending a notification if there is nothing to discard.
// TODO(mthiesse): Temporarily checking failed_pending_entry_id_ to help
// diagnose https://bugs.chromium.org/p/chromium/issues/detail?id=1007570.
if (!pending_entry_ && failed_pending_entry_id_ == 0) {
return;
}
DiscardPendingEntry(false);
if (delegate_)
delegate_->NotifyNavigationStateChanged(INVALIDATE_TYPE_ALL);
}
int NavigationControllerImpl::GetEntryIndexWithUniqueID(
int nav_entry_id) const {
for (int i = static_cast<int>(entries_.size()) - 1; i >= 0; --i) {
if (entries_[i]->GetUniqueID() == nav_entry_id)
return i;
}
return -1;
}
void NavigationControllerImpl::InsertEntriesFrom(
NavigationControllerImpl* source,
int max_index) {
DCHECK_LE(max_index, source->GetEntryCount());
for (int i = 0; i < max_index; i++) {
// TODO(creis): Once we start sharing FrameNavigationEntries between
// NavigationEntries, it will not be safe to share them with another tab.
// Must have a version of Clone that recreates them.
entries_.insert(entries_.begin() + i, source->entries_[i]->Clone());
}
DCHECK(pending_entry_index_ == -1 ||
pending_entry_ == GetEntryAtIndex(pending_entry_index_));
}
void NavigationControllerImpl::SetGetTimestampCallbackForTest(
const base::RepeatingCallback<base::Time()>& get_timestamp_callback) {
get_timestamp_callback_ = get_timestamp_callback;
}
// History manipulation intervention:
void NavigationControllerImpl::SetShouldSkipOnBackForwardUIIfNeeded(
bool replace_entry,
bool previous_document_was_activated,
bool is_renderer_initiated,
ukm::SourceId previous_page_load_ukm_source_id) {
// Note that for a subframe, previous_document_was_activated is true if the
// gesture happened in any subframe (propagated to main frame) or in the main
// frame itself.
if (replace_entry || previous_document_was_activated ||
!is_renderer_initiated) {
if (last_committed_entry_index_ != -1) {
// This histogram always counts when navigating away from an entry,
// irrespective of whether the skippable flag was changed or not, and
// whether this entry is being reused or not.
UMA_HISTOGRAM_BOOLEAN(
"Navigation.BackForward.SetShouldSkipOnBackForwardUI",
GetEntryAtIndex(last_committed_entry_index_)
->should_skip_on_back_forward_ui());
}
return;
}
if (last_committed_entry_index_ == -1)
return;
SetSkippableForSameDocumentEntries(last_committed_entry_index_, true);
UMA_HISTOGRAM_BOOLEAN("Navigation.BackForward.SetShouldSkipOnBackForwardUI",
true);
// Log UKM with the URL we are navigating away from.
ukm::builders::HistoryManipulationIntervention(
previous_page_load_ukm_source_id)
.Record(ukm::UkmRecorder::Get());
}
void NavigationControllerImpl::SetSkippableForSameDocumentEntries(
int reference_index,
bool skippable) {
auto* reference_entry = GetEntryAtIndex(reference_index);
reference_entry->set_should_skip_on_back_forward_ui(skippable);
int64_t document_sequence_number =
reference_entry->root_node()->frame_entry->document_sequence_number();
for (int index = 0; index < GetEntryCount(); index++) {
auto* entry = GetEntryAtIndex(index);
if (entry->root_node()->frame_entry->document_sequence_number() ==
document_sequence_number) {
entry->set_should_skip_on_back_forward_ui(skippable);
}
}
}
std::unique_ptr<NavigationControllerImpl::PendingEntryRef>
NavigationControllerImpl::ReferencePendingEntry() {
DCHECK(pending_entry_);
auto pending_entry_ref =
std::make_unique<PendingEntryRef>(weak_factory_.GetWeakPtr());
pending_entry_refs_.insert(pending_entry_ref.get());
return pending_entry_ref;
}
void NavigationControllerImpl::PendingEntryRefDeleted(PendingEntryRef* ref) {
// Ignore refs that don't correspond to the current pending entry.
auto it = pending_entry_refs_.find(ref);
if (it == pending_entry_refs_.end())
return;
pending_entry_refs_.erase(it);
if (!pending_entry_refs_.empty())
return;
// The pending entry may be deleted before the last PendingEntryRef.
if (!pending_entry_)
return;
// We usually clear the pending entry when the matching NavigationRequest
// fails, so that an arbitrary URL isn't left visible above a committed page.
//
// However, we do preserve the pending entry in some cases, such as on the
// initial navigation of an unmodified blank tab. We also allow the delegate
// to say when it's safe to leave aborted URLs in the omnibox, to let the
// user edit the URL and try again. This may be useful in cases that the
// committed page cannot be attacker-controlled. In these cases, we still
// allow the view to clear the pending entry and typed URL if the user
// requests (e.g., hitting Escape with focus in the address bar).
//
// Do not leave the pending entry visible if it has an invalid URL, since this
// might be formatted in an unexpected or unsafe way.
// TODO(creis): Block navigations to invalid URLs in https://crbug.com/850824.
bool should_preserve_entry =
(pending_entry_ == GetVisibleEntry()) &&
pending_entry_->GetURL().is_valid() &&
(IsUnmodifiedBlankTab() || delegate_->ShouldPreserveAbortedURLs());
if (should_preserve_entry)
return;
DiscardPendingEntry(true);
delegate_->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
}
std::unique_ptr<PolicyContainerHost::DocumentPolicies>
NavigationControllerImpl::ComputeDocumentPoliciesForFrameEntry(
RenderFrameHostImpl* rfh,
bool is_same_document,
NavigationRequest* request) {
if (!ShouldStoreDocumentPoliciesInFrameNavigationEntry(request))
return nullptr;
if (is_same_document) {
FrameNavigationEntry* previous_frame_entry =
GetLastCommittedEntry()->GetFrameEntry(rfh->frame_tree_node());
// TODO(https://crbug.com/608402): Remove this nullptr check when we can
// ensure we always have a FrameNavigationEntry here.
if (!previous_frame_entry)
return nullptr;
const PolicyContainerHost::DocumentPolicies* previous_document_policies =
previous_frame_entry->document_policies();
if (!previous_document_policies)
return nullptr;
// Make a copy of the policy container for the new FrameNavigationEntry.
return std::make_unique<PolicyContainerHost::DocumentPolicies>(
*previous_document_policies);
}
if (!request->IsWaitingToCommit()) {
// This is the initial, "fake" navigation to about:blank. The
// NavigationRequest contains a dummy policy container, while the
// RenderFrameHost already inherited the policy container from the
// creator, so let's take the policies from there.
return std::make_unique<PolicyContainerHost::DocumentPolicies>(
rfh->policy_container_host()->document_policies());
}
// Take the policy container from the request since we did not move it
// into the RFH yet.
return std::make_unique<PolicyContainerHost::DocumentPolicies>(
request->policy_container_host()->document_policies());
}
} // namespace content