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chromium / chromium / src / ce0ef3575be4a50acfc2f2682878a69f8ce93bf0 / . / content / browser / frame_host / navigator_impl.cc
blob: 1927b1c31666871a2f9bdf3348a63892462c9e09 [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.
#include "content/browser/frame_host/navigator_impl.h"
#include <utility>
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/frame_host/debug_urls.h"
#include "content/browser/frame_host/frame_tree.h"
#include "content/browser/frame_host/frame_tree_node.h"
#include "content/browser/frame_host/navigation_controller_impl.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/frame_host/navigation_handle_impl.h"
#include "content/browser/frame_host/navigation_request.h"
#include "content/browser/frame_host/navigation_request_info.h"
#include "content/browser/frame_host/navigator_delegate.h"
#include "content/browser/frame_host/render_frame_host_impl.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/webui/web_ui_controller_factory_registry.h"
#include "content/browser/webui/web_ui_impl.h"
#include "content/common/frame_messages.h"
#include "content/common/navigation_params.h"
#include "content/common/page_messages.h"
#include "content/common/site_isolation_policy.h"
#include "content/common/view_messages.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/global_request_id.h"
#include "content/public/browser/invalidate_type.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/page_navigator.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/stream_handle.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/common/bindings_policy.h"
#include "content/public/common/browser_side_navigation_policy.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/resource_response.h"
#include "net/base/net_errors.h"
#include "url/gurl.h"
namespace content {
namespace {
FrameMsg_Navigate_Type::Value GetNavigationType(
BrowserContext* browser_context,
const NavigationEntryImpl& entry,
ReloadType reload_type) {
switch (reload_type) {
case ReloadType::NORMAL:
return FrameMsg_Navigate_Type::RELOAD;
case ReloadType::BYPASSING_CACHE:
case ReloadType::DISABLE_LOFI_MODE:
return FrameMsg_Navigate_Type::RELOAD_BYPASSING_CACHE;
case ReloadType::ORIGINAL_REQUEST_URL:
return FrameMsg_Navigate_Type::RELOAD_ORIGINAL_REQUEST_URL;
case ReloadType::NONE:
break; // Fall through to rest of function.
}
// |RenderViewImpl::PopulateStateFromPendingNavigationParams| differentiates
// between |RESTORE_WITH_POST| and |RESTORE|.
if (entry.restore_type() == RestoreType::LAST_SESSION_EXITED_CLEANLY) {
if (entry.GetHasPostData())
return FrameMsg_Navigate_Type::RESTORE_WITH_POST;
return FrameMsg_Navigate_Type::RESTORE;
}
return FrameMsg_Navigate_Type::NORMAL;
}
} // namespace
struct NavigatorImpl::NavigationMetricsData {
NavigationMetricsData(base::TimeTicks start_time,
GURL url,
RestoreType restore_type)
: start_time_(start_time), url_(url) {
is_restoring_from_last_session_ =
(restore_type == RestoreType::LAST_SESSION_EXITED_CLEANLY ||
restore_type == RestoreType::LAST_SESSION_CRASHED);
}
base::TimeTicks start_time_;
GURL url_;
bool is_restoring_from_last_session_;
base::TimeTicks url_job_start_time_;
base::TimeDelta before_unload_delay_;
};
NavigatorImpl::NavigatorImpl(
NavigationControllerImpl* navigation_controller,
NavigatorDelegate* delegate)
: controller_(navigation_controller),
delegate_(delegate) {
}
NavigatorImpl::~NavigatorImpl() {}
// static
void NavigatorImpl::CheckWebUIRendererDoesNotDisplayNormalURL(
RenderFrameHostImpl* render_frame_host,
const GURL& url) {
int enabled_bindings =
render_frame_host->render_view_host()->GetEnabledBindings();
bool is_allowed_in_web_ui_renderer =
WebUIControllerFactoryRegistry::GetInstance()->IsURLAcceptableForWebUI(
render_frame_host->frame_tree_node()
->navigator()
->GetController()
->GetBrowserContext(),
url);
if ((enabled_bindings & BINDINGS_POLICY_WEB_UI) &&
!is_allowed_in_web_ui_renderer) {
// Log the URL to help us diagnose any future failures of this CHECK.
GetContentClient()->SetActiveURL(url);
CHECK(0);
}
}
NavigatorDelegate* NavigatorImpl::GetDelegate() {
return delegate_;
}
NavigationController* NavigatorImpl::GetController() {
return controller_;
}
void NavigatorImpl::DidStartProvisionalLoad(
RenderFrameHostImpl* render_frame_host,
const GURL& url,
const base::TimeTicks& navigation_start) {
bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
bool is_error_page = (url.spec() == kUnreachableWebDataURL);
GURL validated_url(url);
RenderProcessHost* render_process_host = render_frame_host->GetProcess();
render_process_host->FilterURL(false, &validated_url);
// Do not allow browser plugin guests to navigate to non-web URLs, since they
// cannot swap processes or grant bindings.
ChildProcessSecurityPolicyImpl* policy =
ChildProcessSecurityPolicyImpl::GetInstance();
if (render_process_host->IsForGuestsOnly() &&
!policy->IsWebSafeScheme(validated_url.scheme())) {
validated_url = GURL(url::kAboutBlankURL);
}
if (is_main_frame && !is_error_page) {
DidStartMainFrameNavigation(validated_url,
render_frame_host->GetSiteInstance(),
render_frame_host->navigation_handle());
}
if (delegate_) {
// Notify the observer about the start of the provisional load.
delegate_->DidStartProvisionalLoad(render_frame_host, validated_url,
is_error_page);
}
if (is_error_page || IsBrowserSideNavigationEnabled())
return;
if (render_frame_host->navigation_handle()) {
if (render_frame_host->navigation_handle()->is_transferring()) {
// If the navigation is completing a transfer, this
// DidStartProvisionalLoad should not correspond to a new navigation.
DCHECK_EQ(url, render_frame_host->navigation_handle()->GetURL());
render_frame_host->navigation_handle()->set_is_transferring(false);
return;
}
// This ensures that notifications about the end of the previous
// navigation are sent before notifications about the start of the
// new navigation.
render_frame_host->SetNavigationHandle(
std::unique_ptr<NavigationHandleImpl>());
}
// It is safer to assume navigations are renderer-initiated unless shown
// otherwise. Browser navigations generally have more privileges, and they
// should always have a pending NavigationEntry to distinguish them.
bool is_renderer_initiated = true;
int pending_nav_entry_id = 0;
bool started_from_context_menu = false;
NavigationEntryImpl* pending_entry = controller_->GetPendingEntry();
if (pending_entry) {
is_renderer_initiated = pending_entry->is_renderer_initiated();
pending_nav_entry_id = pending_entry->GetUniqueID();
started_from_context_menu = pending_entry->has_started_from_context_menu();
}
render_frame_host->SetNavigationHandle(NavigationHandleImpl::Create(
validated_url, render_frame_host->frame_tree_node(),
is_renderer_initiated,
false, // is_same_page
navigation_start, pending_nav_entry_id,
started_from_context_menu));
}
void NavigatorImpl::DidFailProvisionalLoadWithError(
RenderFrameHostImpl* render_frame_host,
const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
VLOG(1) << "Failed Provisional Load: " << params.url.possibly_invalid_spec()
<< ", error_code: " << params.error_code
<< ", error_description: " << params.error_description
<< ", showing_repost_interstitial: " <<
params.showing_repost_interstitial
<< ", frame_id: " << render_frame_host->GetRoutingID();
GURL validated_url(params.url);
RenderProcessHost* render_process_host = render_frame_host->GetProcess();
render_process_host->FilterURL(false, &validated_url);
if (net::ERR_ABORTED == params.error_code) {
// EVIL HACK ALERT! Ignore failed loads when we're showing interstitials.
// This means that the interstitial won't be torn down properly, which is
// bad. But if we have an interstitial, go back to another tab type, and
// then load the same interstitial again, we could end up getting the first
// interstitial's "failed" message (as a result of the cancel) when we're on
// the second one. We can't tell this apart, so we think we're tearing down
// the current page which will cause a crash later on.
//
// http://code.google.com/p/chromium/issues/detail?id=2855
// Because this will not tear down the interstitial properly, if "back" is
// back to another tab type, the interstitial will still be somewhat alive
// in the previous tab type. If you navigate somewhere that activates the
// tab with the interstitial again, you'll see a flash before the new load
// commits of the interstitial page.
FrameTreeNode* root =
render_frame_host->frame_tree_node()->frame_tree()->root();
if (root->render_manager()->interstitial_page() != NULL) {
LOG(WARNING) << "Discarding message during interstitial.";
return;
}
// We used to cancel the pending renderer here for cross-site downloads.
// However, it's not safe to do that because the download logic repeatedly
// looks for this WebContents based on a render ID. Instead, we just
// leave the pending renderer around until the next navigation event
// (Navigate, DidNavigate, etc), which will clean it up properly.
//
// TODO(creis): Find a way to cancel any pending RFH here.
}
// Discard the pending navigation entry if needed.
DiscardPendingEntryIfNeeded(render_frame_host->navigation_handle());
if (delegate_) {
delegate_->DidFailProvisionalLoadWithError(
render_frame_host, validated_url, params.error_code,
params.error_description, params.was_ignored_by_handler);
}
}
void NavigatorImpl::DidFailLoadWithError(
RenderFrameHostImpl* render_frame_host,
const GURL& url,
int error_code,
const base::string16& error_description,
bool was_ignored_by_handler) {
if (delegate_) {
delegate_->DidFailLoadWithError(
render_frame_host, url, error_code,
error_description, was_ignored_by_handler);
}
}
bool NavigatorImpl::NavigateToEntry(
FrameTreeNode* frame_tree_node,
const FrameNavigationEntry& frame_entry,
const NavigationEntryImpl& entry,
ReloadType reload_type,
bool is_same_document_history_load,
bool is_history_navigation_in_new_child,
bool is_pending_entry,
const scoped_refptr<ResourceRequestBodyImpl>& post_body) {
TRACE_EVENT0("browser,navigation", "NavigatorImpl::NavigateToEntry");
GURL dest_url = frame_entry.url();
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, 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();
}
// Don't attempt to navigate if the virtual URL is non-empty and invalid.
if (frame_tree_node->IsMainFrame()) {
const GURL& virtual_url = entry.GetVirtualURL();
if (!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;
}
// 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"). We need to keep it above RFHM::Navigate() call to
// capture the time needed for the RenderFrameHost initialization.
base::TimeTicks navigation_start = base::TimeTicks::Now();
TRACE_EVENT_INSTANT_WITH_TIMESTAMP0(
"navigation,rail", "NavigationTiming navigationStart",
TRACE_EVENT_SCOPE_GLOBAL, navigation_start);
// Determine if Previews should be used for the navigation.
PreviewsState previews_state = 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();
} else if (reload_type == ReloadType::DISABLE_LOFI_MODE) {
// Disable LoFi when asked for it explicitly.
previews_state = PREVIEWS_NO_TRANSFORM;
}
// PlzNavigate: the RenderFrameHosts are no longer asked to navigate.
if (IsBrowserSideNavigationEnabled()) {
navigation_data_.reset(new NavigationMetricsData(navigation_start, dest_url,
entry.restore_type()));
RequestNavigation(frame_tree_node, dest_url, dest_referrer, frame_entry,
entry, reload_type, previews_state,
is_same_document_history_load,
is_history_navigation_in_new_child, navigation_start);
if (frame_tree_node->IsMainFrame() &&
frame_tree_node->navigation_request()) {
// TODO(carlosk): extend these traces to support subframes and
// non-PlzNavigate navigations.
// For the trace below we're using the navigation handle as the async
// trace id, |navigation_start| as the timestamp and reporting the
// FrameTreeNode id as a parameter. For navigations where no network
// request is made (data URLs, JavaScript URLs, etc) there is no handle
// and so no tracing is done.
TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP1(
"navigation", "Navigation timeToNetworkStack",
frame_tree_node->navigation_request()->navigation_handle(),
navigation_start,
"FrameTreeNode id", frame_tree_node->frame_tree_node_id());
}
} else {
RenderFrameHostImpl* dest_render_frame_host =
frame_tree_node->render_manager()->Navigate(
dest_url, frame_entry, entry, reload_type != ReloadType::NONE);
if (!dest_render_frame_host)
return false; // Unable to create the desired RenderFrameHost.
// Make sure no code called via RFHM::Navigate clears the pending entry.
if (is_pending_entry)
CHECK_EQ(controller_->GetPendingEntry(), &entry);
// For security, we should never send non-Web-UI URLs to a Web UI renderer.
// Double check that here.
CheckWebUIRendererDoesNotDisplayNormalURL(dest_render_frame_host, dest_url);
// In the case of a transfer navigation, set the destination
// RenderFrameHost as loading. This ensures that the RenderFrameHost gets
// in a loading state without emitting a spurious DidStartLoading
// notification at the FrameTreeNode level (since the FrameTreeNode was
// already loading). Note that this works both for a transfer to a
// different RenderFrameHost and in the rare case where the navigation is
// transferred back to the same RenderFrameHost.
bool is_transfer = entry.transferred_global_request_id().child_id != -1;
if (is_transfer)
dest_render_frame_host->set_is_loading(true);
// A session history navigation should have been accompanied by state.
// TODO(creis): This is known to be failing in UseSubframeNavigationEntries
// in https://crbug.com/568703, when the PageState on a FrameNavigationEntry
// is unexpectedly empty. Until the cause is found, keep this as a DCHECK
// and load the URL without PageState.
if (is_pending_entry && controller_->GetPendingEntryIndex() != -1)
DCHECK(frame_entry.page_state().IsValid());
// Navigate in the desired RenderFrameHost.
// We can skip this step in the rare case that this is a transfer navigation
// which began in the chosen RenderFrameHost, since the request has already
// been issued. In that case, simply resume the response.
bool is_transfer_to_same =
is_transfer &&
entry.transferred_global_request_id().child_id ==
dest_render_frame_host->GetProcess()->GetID();
if (!is_transfer_to_same) {
navigation_data_.reset(new NavigationMetricsData(
navigation_start, dest_url, entry.restore_type()));
// Create the navigation parameters.
FrameMsg_Navigate_Type::Value navigation_type = GetNavigationType(
controller_->GetBrowserContext(), entry, reload_type);
dest_render_frame_host->Navigate(
entry.ConstructCommonNavigationParams(
frame_entry, post_body, dest_url, dest_referrer, navigation_type,
previews_state, navigation_start),
entry.ConstructStartNavigationParams(),
entry.ConstructRequestNavigationParams(
frame_entry, is_same_document_history_load,
is_history_navigation_in_new_child,
entry.GetSubframeUniqueNames(frame_tree_node),
frame_tree_node->has_committed_real_load(),
controller_->GetPendingEntryIndex() == -1,
controller_->GetIndexOfEntry(&entry),
controller_->GetLastCommittedEntryIndex(),
controller_->GetEntryCount()));
} else {
dest_render_frame_host->navigation_handle()->set_is_transferring(false);
}
}
// Make sure no code called via RFH::Navigate clears the pending entry.
if (is_pending_entry)
CHECK_EQ(controller_->GetPendingEntry(), &entry);
if (controller_->GetPendingEntryIndex() == -1 &&
dest_url.SchemeIs(url::kJavaScriptScheme)) {
// If the pending entry index is -1 (which means a new navigation rather
// than a history one), and the user typed in a javascript: URL, don't add
// it to the session history.
//
// This is a hack. What we really want is to avoid adding to the history any
// URL that doesn't generate content, and what would be great would be if we
// had a message from the renderer telling us that a new page was not
// created. The same message could be used for mailto: URLs and the like.
return false;
}
// Notify observers about navigation.
if (delegate_ && is_pending_entry)
delegate_->DidStartNavigationToPendingEntry(dest_url, reload_type);
return true;
}
bool NavigatorImpl::NavigateToPendingEntry(
FrameTreeNode* frame_tree_node,
const FrameNavigationEntry& frame_entry,
ReloadType reload_type,
bool is_same_document_history_load) {
return NavigateToEntry(frame_tree_node, frame_entry,
*controller_->GetPendingEntry(), reload_type,
is_same_document_history_load, false, true, nullptr);
}
bool NavigatorImpl::NavigateNewChildFrame(
RenderFrameHostImpl* render_frame_host,
const GURL& default_url) {
NavigationEntryImpl* entry =
controller_->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;
// Track how often history navigations load a different URL into a subframe
// than the frame's default URL.
bool restoring_different_url = frame_entry->url() != default_url;
UMA_HISTOGRAM_BOOLEAN("SessionRestore.RestoredSubframeURL",
restoring_different_url);
// If this frame's unique name uses a frame path, record the name length.
// If these names are long in practice, then a proposed plan to truncate
// unique names might affect restore behavior, since it is complex to deal
// with truncated names inside frame paths.
if (restoring_different_url) {
const std::string& unique_name =
render_frame_host->frame_tree_node()->unique_name();
const char kFramePathPrefix[] = "<!--framePath ";
if (base::StartsWith(unique_name, kFramePathPrefix,
base::CompareCase::SENSITIVE)) {
UMA_HISTOGRAM_COUNTS("SessionRestore.RestoreSubframeFramePathLength",
unique_name.size());
}
}
return NavigateToEntry(render_frame_host->frame_tree_node(), *frame_entry,
*entry, ReloadType::NONE, false, true, false, nullptr);
}
void NavigatorImpl::DidNavigate(
RenderFrameHostImpl* render_frame_host,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
std::unique_ptr<NavigationHandleImpl> navigation_handle) {
FrameTree* frame_tree = render_frame_host->frame_tree_node()->frame_tree();
bool oopifs_possible = SiteIsolationPolicy::AreCrossProcessFramesPossible();
bool has_embedded_credentials =
params.url.has_username() || params.url.has_password();
UMA_HISTOGRAM_BOOLEAN("Navigation.FrameHasEmbeddedCredentials",
has_embedded_credentials);
bool is_navigation_within_page = controller_->IsURLInPageNavigation(
params.url, params.origin, params.was_within_same_page,
render_frame_host);
// If a frame claims it navigated within page, it must be the current frame,
// not a pending one.
if (is_navigation_within_page &&
render_frame_host !=
render_frame_host->frame_tree_node()
->render_manager()
->current_frame_host()) {
bad_message::ReceivedBadMessage(render_frame_host->GetProcess(),
bad_message::NI_IN_PAGE_NAVIGATION);
is_navigation_within_page = false;
}
if (ui::PageTransitionIsMainFrame(params.transition)) {
if (delegate_) {
// When overscroll navigation gesture is enabled, a screenshot of the page
// in its current state is taken so that it can be used during the
// nav-gesture. It is necessary to take the screenshot here, before
// calling RenderFrameHostManager::DidNavigateMainFrame, because that can
// change WebContents::GetRenderViewHost to return the new host, instead
// of the one that may have just been swapped out.
if (delegate_->CanOverscrollContent()) {
// Don't take screenshots if we are staying on the same page. We want
// in-page navigations to be super fast, and taking a screenshot
// currently blocks GPU for a longer time than we are willing to
// tolerate in this use case.
if (!params.was_within_same_page)
controller_->TakeScreenshot();
}
// Run tasks that must execute just before the commit.
delegate_->DidNavigateMainFramePreCommit(is_navigation_within_page);
UMA_HISTOGRAM_BOOLEAN("Navigation.MainFrameHasEmbeddedCredentials",
has_embedded_credentials);
}
if (!oopifs_possible)
frame_tree->root()->render_manager()->DidNavigateFrame(
render_frame_host, params.gesture == NavigationGestureUser);
}
// Save the origin of the new page. Do this before calling
// DidNavigateFrame(), because the origin needs to be included in the SwapOut
// message, which is sent inside DidNavigateFrame(). SwapOut needs the
// origin because it creates a RenderFrameProxy that needs this to initialize
// its security context. This origin will also be sent to RenderFrameProxies
// created via mojom::Renderer::CreateView and
// mojom::Renderer::CreateFrameProxy.
render_frame_host->frame_tree_node()->SetCurrentOrigin(
params.origin, params.has_potentially_trustworthy_unique_origin);
render_frame_host->frame_tree_node()->SetInsecureRequestPolicy(
params.insecure_request_policy);
// Navigating to a new location means a new, fresh set of http headers and/or
// <meta> elements - we need to reset CSP and Feature Policy.
if (!is_navigation_within_page) {
render_frame_host->frame_tree_node()->ResetContentSecurityPolicy();
render_frame_host->frame_tree_node()->ResetFeaturePolicy();
}
// When using --site-per-process, we notify the RFHM for all navigations,
// not just main frame navigations.
if (oopifs_possible) {
FrameTreeNode* frame = render_frame_host->frame_tree_node();
frame->render_manager()->DidNavigateFrame(
render_frame_host, params.gesture == NavigationGestureUser);
}
// Update the site of the SiteInstance if it doesn't have one yet, unless
// assigning a site is not necessary for this URL. In that case, the
// SiteInstance can still be considered unused until a navigation to a real
// page.
SiteInstanceImpl* site_instance = render_frame_host->GetSiteInstance();
if (!site_instance->HasSite() &&
ShouldAssignSiteForURL(params.url)) {
site_instance->SetSite(params.url);
}
// Need to update MIME type here because it's referred to in
// UpdateNavigationCommands() called by RendererDidNavigate() to
// determine whether or not to enable the encoding menu.
// It's updated only for the main frame. For a subframe,
// RenderView::UpdateURL does not set params.contents_mime_type.
// (see http://code.google.com/p/chromium/issues/detail?id=2929 )
// TODO(jungshik): Add a test for the encoding menu to avoid
// regressing it again.
// TODO(nasko): Verify the correctness of the above comment, since some of the
// code doesn't exist anymore. Also, move this code in the
// PageTransitionIsMainFrame code block above.
if (ui::PageTransitionIsMainFrame(params.transition) && delegate_)
delegate_->SetMainFrameMimeType(params.contents_mime_type);
int old_entry_count = controller_->GetEntryCount();
LoadCommittedDetails details;
bool did_navigate = controller_->RendererDidNavigate(
render_frame_host, params, &details, is_navigation_within_page,
navigation_handle.get());
// If the history length and/or offset changed, update other renderers in the
// FrameTree.
if (old_entry_count != controller_->GetEntryCount() ||
details.previous_entry_index !=
controller_->GetLastCommittedEntryIndex()) {
frame_tree->root()->render_manager()->SendPageMessage(
new PageMsg_SetHistoryOffsetAndLength(
MSG_ROUTING_NONE, controller_->GetLastCommittedEntryIndex(),
controller_->GetEntryCount()),
site_instance);
}
// Keep track of the last committed URL and origin in the RenderFrameHost
// itself. These allow GetLastCommittedURL and GetLastCommittedOrigin to
// stay correct even if the render_frame_host later becomes pending deletion.
// The URL is set regardless of whether it's for a net error or not.
render_frame_host->frame_tree_node()->SetCurrentURL(params.url);
render_frame_host->set_last_committed_origin(params.origin);
// Separately, update the frame's last successful URL except for net error
// pages, since those do not end up in the correct process after transfers
// (see https://crbug.com/560511). Instead, the next cross-process navigation
// or transfer should decide whether to swap as if the net error had not
// occurred.
// TODO(creis): Remove this block and always set the URL once transfers handle
// network errors or PlzNavigate is enabled. See https://crbug.com/588314.
if (!params.url_is_unreachable)
render_frame_host->set_last_successful_url(params.url);
// Send notification about committed provisional loads. This notification is
// different from the NAV_ENTRY_COMMITTED notification which doesn't include
// the actual URL navigated to and isn't sent for AUTO_SUBFRAME navigations.
if (details.type != NAVIGATION_TYPE_NAV_IGNORE && delegate_) {
DCHECK_EQ(!render_frame_host->GetParent(),
did_navigate ? details.is_main_frame : false);
ui::PageTransition transition_type = params.transition;
// Whether or not a page transition was triggered by going backward or
// forward in the history is only stored in the navigation controller's
// entry list.
if (did_navigate &&
(controller_->GetLastCommittedEntry()->GetTransitionType() &
ui::PAGE_TRANSITION_FORWARD_BACK)) {
transition_type = ui::PageTransitionFromInt(
params.transition | ui::PAGE_TRANSITION_FORWARD_BACK);
}
delegate_->DidCommitProvisionalLoad(render_frame_host,
params.url,
transition_type);
navigation_handle->DidCommitNavigation(params, is_navigation_within_page,
render_frame_host);
navigation_handle.reset();
}
if (!did_navigate)
return; // No navigation happened.
// DO NOT ADD MORE STUFF TO THIS FUNCTION! Your component should either listen
// for the appropriate notification (best) or you can add it to
// DidNavigateMainFramePostCommit / DidNavigateAnyFramePostCommit (only if
// necessary, please).
// TODO(carlosk): Move this out when PlzNavigate implementation properly calls
// the observer methods.
RecordNavigationMetrics(details, params, site_instance);
// Run post-commit tasks.
if (delegate_) {
if (details.is_main_frame) {
delegate_->DidNavigateMainFramePostCommit(render_frame_host,
details, params);
}
delegate_->DidNavigateAnyFramePostCommit(
render_frame_host, details, params);
}
}
bool NavigatorImpl::ShouldAssignSiteForURL(const GURL& url) {
// about:blank should not "use up" a new SiteInstance. The SiteInstance can
// still be used for a normal web site.
if (url == url::kAboutBlankURL)
return false;
// The embedder will then have the opportunity to determine if the URL
// should "use up" the SiteInstance.
return GetContentClient()->browser()->ShouldAssignSiteForURL(url);
}
void NavigatorImpl::RequestOpenURL(
RenderFrameHostImpl* render_frame_host,
const GURL& url,
bool uses_post,
const scoped_refptr<ResourceRequestBodyImpl>& body,
const std::string& extra_headers,
const Referrer& referrer,
WindowOpenDisposition disposition,
bool should_replace_current_entry,
bool user_gesture) {
// Note: This can be called for subframes (even when OOPIFs are not possible)
// if the disposition calls for a different window.
// Only the current RenderFrameHost should be sending an OpenURL request.
// Pending RenderFrameHost should know where it is navigating and pending
// deletion RenderFrameHost shouldn't be trying to navigate.
if (render_frame_host !=
render_frame_host->frame_tree_node()->current_frame_host()) {
return;
}
SiteInstance* current_site_instance = render_frame_host->GetSiteInstance();
// TODO(creis): Pass the redirect_chain into this method to support client
// redirects. http://crbug.com/311721.
std::vector<GURL> redirect_chain;
// Note that unlike RequestTransferURL, this uses the navigating
// RenderFrameHost's current SiteInstance, as that's where this navigation
// originated.
GURL dest_url(url);
if (!GetContentClient()->browser()->ShouldAllowOpenURL(
current_site_instance, url)) {
dest_url = GURL(url::kAboutBlankURL);
}
int frame_tree_node_id = -1;
// Send the navigation to the current FrameTreeNode if it's destined for a
// subframe in the current tab. We'll assume it's for the main frame
// (possibly of a new or different WebContents) otherwise.
if (disposition == WindowOpenDisposition::CURRENT_TAB &&
render_frame_host->GetParent()) {
frame_tree_node_id =
render_frame_host->frame_tree_node()->frame_tree_node_id();
}
OpenURLParams params(dest_url, referrer, frame_tree_node_id, disposition,
ui::PAGE_TRANSITION_LINK,
true /* is_renderer_initiated */);
params.uses_post = uses_post;
params.post_data = body;
params.extra_headers = extra_headers;
if (redirect_chain.size() > 0)
params.redirect_chain = redirect_chain;
params.should_replace_current_entry = should_replace_current_entry;
params.user_gesture = user_gesture;
// RequestOpenURL is used only for local frames, so we can get here only if
// the navigation is initiated by a frame in the same SiteInstance as this
// frame. Note that navigations on RenderFrameProxies do not use
// RequestOpenURL and go through RequestTransferURL instead.
params.source_site_instance = current_site_instance;
if (render_frame_host->web_ui()) {
// Note that we hide the referrer for Web UI pages. We don't really want
// web sites to see a referrer of "chrome://blah" (and some chrome: URLs
// might have search terms or other stuff we don't want to send to the
// site), so we send no referrer.
params.referrer = Referrer();
// Navigations in Web UI pages count as browser-initiated navigations.
params.is_renderer_initiated = false;
}
GetContentClient()->browser()->OverrideNavigationParams(
current_site_instance, &params.transition, &params.is_renderer_initiated,
&params.referrer);
if (delegate_)
delegate_->RequestOpenURL(render_frame_host, params);
}
void NavigatorImpl::RequestTransferURL(
RenderFrameHostImpl* render_frame_host,
const GURL& url,
SiteInstance* source_site_instance,
const std::vector<GURL>& redirect_chain,
const Referrer& referrer,
ui::PageTransition page_transition,
const GlobalRequestID& transferred_global_request_id,
bool should_replace_current_entry,
const std::string& method,
scoped_refptr<ResourceRequestBodyImpl> post_body,
const std::string& extra_headers) {
// |method != "POST"| should imply absence of |post_body|.
if (method != "POST" && post_body) {
NOTREACHED();
post_body = nullptr;
}
// This call only makes sense for subframes if OOPIFs are possible.
DCHECK(!render_frame_host->GetParent() ||
SiteIsolationPolicy::AreCrossProcessFramesPossible());
// Allow the delegate to cancel the transfer.
if (!delegate_->ShouldTransferNavigation(
render_frame_host->frame_tree_node()->IsMainFrame()))
return;
GURL dest_url(url);
Referrer referrer_to_use(referrer);
FrameTreeNode* node = render_frame_host->frame_tree_node();
SiteInstance* current_site_instance = render_frame_host->GetSiteInstance();
// It is important to pass in the source_site_instance if it is available
// (such as when navigating a proxy). See https://crbug.com/656752.
if (!GetContentClient()->browser()->ShouldAllowOpenURL(
source_site_instance ? source_site_instance : current_site_instance,
url)) {
// It is important to return here, rather than rewrite the dest_url to
// about:blank. The latter won't actually have any effect when
// transferring, as NavigateToEntry will think that the transfer is to the
// same RFH that started the navigation and let the existing navigation
// (for the disallowed URL) proceed.
return;
}
// TODO(creis): Determine if this transfer started as a browser-initiated
// navigation. See https://crbug.com/495161.
bool is_renderer_initiated = true;
if (render_frame_host->web_ui()) {
// Note that we hide the referrer for Web UI pages. We don't really want
// web sites to see a referrer of "chrome://blah" (and some chrome: URLs
// might have search terms or other stuff we don't want to send to the
// site), so we send no referrer.
referrer_to_use = Referrer();
// Navigations in Web UI pages count as browser-initiated navigations.
is_renderer_initiated = false;
}
GetContentClient()->browser()->OverrideNavigationParams(
current_site_instance, &page_transition, &is_renderer_initiated,
&referrer_to_use);
// Create a NavigationEntry for the transfer, without making it the pending
// entry. Subframe transfers should only be possible in OOPIF-enabled modes,
// and 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 (controller_->GetLastCommittedEntry()) {
entry = controller_->GetLastCommittedEntry()->Clone();
entry->set_extra_headers(extra_headers);
} 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(
controller_->CreateNavigationEntry(
GURL(url::kAboutBlankURL), referrer_to_use, page_transition,
is_renderer_initiated, extra_headers,
controller_->GetBrowserContext()));
}
entry->AddOrUpdateFrameEntry(
node, -1, -1, nullptr,
static_cast<SiteInstanceImpl*>(source_site_instance),
dest_url, referrer_to_use, redirect_chain, PageState(), method,
-1);
} else {
// Main frame case.
entry = NavigationEntryImpl::FromNavigationEntry(
controller_->CreateNavigationEntry(
dest_url, referrer_to_use, page_transition, is_renderer_initiated,
extra_headers, controller_->GetBrowserContext()));
entry->root_node()->frame_entry->set_source_site_instance(
static_cast<SiteInstanceImpl*>(source_site_instance));
entry->SetRedirectChain(redirect_chain);
}
// Don't allow an entry replacement if there is no entry to replace.
// http://crbug.com/457149
if (should_replace_current_entry && controller_->GetEntryCount() > 0)
entry->set_should_replace_entry(true);
if (controller_->GetLastCommittedEntry() &&
controller_->GetLastCommittedEntry()->GetIsOverridingUserAgent()) {
entry->SetIsOverridingUserAgent(true);
}
entry->set_transferred_global_request_id(transferred_global_request_id);
// 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 = new FrameNavigationEntry(
node->unique_name(), -1, -1, nullptr,
static_cast<SiteInstanceImpl*>(source_site_instance), dest_url,
referrer_to_use, method, -1);
}
NavigateToEntry(node, *frame_entry, *entry.get(), ReloadType::NONE, false,
false, false, post_body);
}
// PlzNavigate
void NavigatorImpl::OnBeforeUnloadACK(FrameTreeNode* frame_tree_node,
bool proceed) {
CHECK(IsBrowserSideNavigationEnabled());
DCHECK(frame_tree_node);
NavigationRequest* navigation_request = frame_tree_node->navigation_request();
// The NavigationRequest may have been canceled while the renderer was
// executing the BeforeUnload event.
if (!navigation_request)
return;
DCHECK_EQ(NavigationRequest::WAITING_FOR_RENDERER_RESPONSE,
navigation_request->state());
// If the navigation is allowed to proceed, send the request to the IO thread.
if (proceed)
navigation_request->BeginNavigation();
else
CancelNavigation(frame_tree_node);
}
// PlzNavigate
void NavigatorImpl::OnBeginNavigation(
FrameTreeNode* frame_tree_node,
const CommonNavigationParams& common_params,
const BeginNavigationParams& begin_params) {
// TODO(clamy): the url sent by the renderer should be validated with
// FilterURL.
// This is a renderer-initiated navigation.
CHECK(IsBrowserSideNavigationEnabled());
DCHECK(frame_tree_node);
NavigationRequest* ongoing_navigation_request =
frame_tree_node->navigation_request();
// The renderer-initiated navigation request is ignored iff a) there is an
// ongoing request b) which is browser or user-initiated and c) the renderer
// request is not user-initiated.
if (ongoing_navigation_request &&
(ongoing_navigation_request->browser_initiated() ||
ongoing_navigation_request->begin_params().has_user_gesture) &&
!begin_params.has_user_gesture) {
RenderFrameHost* current_frame_host =
frame_tree_node->render_manager()->current_frame_host();
current_frame_host->Send(
new FrameMsg_Stop(current_frame_host->GetRoutingID()));
return;
}
// In all other cases the current navigation, if any, is canceled and a new
// NavigationRequest is created for the node.
frame_tree_node->CreatedNavigationRequest(
NavigationRequest::CreateRendererInitiated(
frame_tree_node, common_params, begin_params,
controller_->GetLastCommittedEntryIndex(),
controller_->GetEntryCount()));
NavigationRequest* navigation_request = frame_tree_node->navigation_request();
if (frame_tree_node->IsMainFrame()) {
// Renderer-initiated main-frame navigations that need to swap processes
// will go to the browser via a OpenURL call, and then be handled by the
// same code path as browser-initiated navigations. For renderer-initiated
// main frame navigation that start via a BeginNavigation IPC, the
// RenderFrameHost will not be swapped. Therefore it is safe to call
// DidStartMainFrameNavigation with the SiteInstance from the current
// RenderFrameHost.
DidStartMainFrameNavigation(
common_params.url,
frame_tree_node->current_frame_host()->GetSiteInstance(), nullptr);
navigation_data_.reset();
}
// For main frames, NavigationHandle will be created after the call to
// |DidStartMainFrameNavigation|, so it receives the most up to date pending
// entry from the NavigationController.
NavigationEntry* pending_entry = controller_->GetPendingEntry();
navigation_request->CreateNavigationHandle(
pending_entry ? pending_entry->GetUniqueID() : 0);
navigation_request->BeginNavigation();
}
// PlzNavigate
void NavigatorImpl::FailedNavigation(FrameTreeNode* frame_tree_node,
bool has_stale_copy_in_cache,
int error_code) {
CHECK(IsBrowserSideNavigationEnabled());
NavigationRequest* navigation_request = frame_tree_node->navigation_request();
DCHECK(navigation_request);
// With PlzNavigate, debug URLs will give a failed navigation because the
// WebUI backend won't find a handler for them. They will be processed in the
// renderer, however do not discard the pending entry so that the URL bar
// shows them correctly.
if (!IsRendererDebugURL(navigation_request->navigation_handle()->GetURL()))
DiscardPendingEntryIfNeeded(navigation_request->navigation_handle());
// If the request was canceled by the user do not show an error page.
if (error_code == net::ERR_ABORTED) {
frame_tree_node->ResetNavigationRequest(false);
return;
}
// Select an appropriate renderer to show the error page.
RenderFrameHostImpl* render_frame_host =
frame_tree_node->render_manager()->GetFrameHostForNavigation(
*navigation_request);
CheckWebUIRendererDoesNotDisplayNormalURL(
render_frame_host, navigation_request->common_params().url);
navigation_request->TransferNavigationHandleOwnership(render_frame_host);
render_frame_host->navigation_handle()->ReadyToCommitNavigation(
render_frame_host);
render_frame_host->FailedNavigation(navigation_request->common_params(),
navigation_request->request_params(),
has_stale_copy_in_cache, error_code);
}
// PlzNavigate
void NavigatorImpl::CancelNavigation(FrameTreeNode* frame_tree_node) {
CHECK(IsBrowserSideNavigationEnabled());
frame_tree_node->ResetNavigationRequest(false);
if (frame_tree_node->IsMainFrame())
navigation_data_.reset();
}
void NavigatorImpl::LogResourceRequestTime(
base::TimeTicks timestamp, const GURL& url) {
if (navigation_data_ && navigation_data_->url_ == url) {
navigation_data_->url_job_start_time_ = timestamp;
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToURLJobStart",
navigation_data_->url_job_start_time_ - navigation_data_->start_time_);
}
}
void NavigatorImpl::LogBeforeUnloadTime(
const base::TimeTicks& renderer_before_unload_start_time,
const base::TimeTicks& renderer_before_unload_end_time) {
// Only stores the beforeunload delay if we're tracking a browser initiated
// navigation and it happened later than the navigation request.
if (navigation_data_ &&
renderer_before_unload_start_time > navigation_data_->start_time_) {
navigation_data_->before_unload_delay_ =
renderer_before_unload_end_time - renderer_before_unload_start_time;
}
}
void NavigatorImpl::DiscardPendingEntryIfNeeded(NavigationHandleImpl* handle) {
// Racy conditions can cause a fail message to arrive after its corresponding
// pending entry has been replaced by another navigation. If
// |DiscardPendingEntry| is called in this case, then the completely valid
// entry for the new navigation would be discarded. See crbug.com/513742. To
// catch this case, the current pending entry is compared against the current
// navigation handle's entry id, which should correspond to the failed load.
NavigationEntry* pending_entry = controller_->GetPendingEntry();
bool pending_matches_fail_msg =
handle && pending_entry &&
handle->pending_nav_entry_id() == pending_entry->GetUniqueID();
if (!pending_matches_fail_msg)
return;
// We usually clear the pending entry when it fails, so that an arbitrary URL
// isn't left visible above a committed page. This must be enforced when the
// pending entry isn't visible (e.g., renderer-initiated navigations) to
// prevent URL spoofs for in-page navigations that don't go through
// DidStartProvisionalLoadForFrame.
//
// 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).
//
// Note: don't touch the transient entry, since an interstitial may exist.
bool should_preserve_entry = controller_->IsUnmodifiedBlankTab() ||
delegate_->ShouldPreserveAbortedURLs();
if (pending_entry != controller_->GetVisibleEntry() ||
!should_preserve_entry) {
controller_->DiscardPendingEntry(true);
// Also force the UI to refresh.
controller_->delegate()->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
}
}
// PlzNavigate
void NavigatorImpl::RequestNavigation(FrameTreeNode* frame_tree_node,
const GURL& dest_url,
const Referrer& dest_referrer,
const FrameNavigationEntry& frame_entry,
const NavigationEntryImpl& entry,
ReloadType reload_type,
PreviewsState previews_state,
bool is_same_document_history_load,
bool is_history_navigation_in_new_child,
base::TimeTicks navigation_start) {
CHECK(IsBrowserSideNavigationEnabled());
DCHECK(frame_tree_node);
// This value must be set here because creating a NavigationRequest might
// change the renderer live/non-live status and change this result.
bool should_dispatch_beforeunload =
!is_same_document_history_load &&
frame_tree_node->current_frame_host()->ShouldDispatchBeforeUnload();
FrameMsg_Navigate_Type::Value navigation_type =
GetNavigationType(controller_->GetBrowserContext(), entry, reload_type);
std::unique_ptr<NavigationRequest> scoped_request =
NavigationRequest::CreateBrowserInitiated(
frame_tree_node, dest_url, dest_referrer, frame_entry, entry,
navigation_type, previews_state, is_same_document_history_load,
is_history_navigation_in_new_child, navigation_start, controller_);
// Navigation to a javascript URL is not a "real" navigation so there is no
// need to create a NavigationHandle. The navigation commits immediately and
// the NavigationRequest is not assigned to the FrameTreeNode as navigating to
// a Javascript URL should not interrupt a previous navigation.
// Note: The scoped_request will be destroyed at the end of this function.
if (dest_url.SchemeIs(url::kJavaScriptScheme)) {
RenderFrameHostImpl* render_frame_host =
frame_tree_node->render_manager()->GetFrameHostForNavigation(
*scoped_request.get());
render_frame_host->CommitNavigation(nullptr, // response
nullptr, // body
scoped_request->common_params(),
scoped_request->request_params(),
scoped_request->is_view_source());
return;
}
frame_tree_node->CreatedNavigationRequest(std::move(scoped_request));
frame_tree_node->navigation_request()->CreateNavigationHandle(
entry.GetUniqueID());
NavigationRequest* navigation_request = frame_tree_node->navigation_request();
if (!navigation_request)
return; // Navigation was synchronously stopped.
// Have the current renderer execute its beforeunload event if needed. If it
// is not needed then NavigationRequest::BeginNavigation should be directly
// called instead.
if (should_dispatch_beforeunload && !IsRendererDebugURL(dest_url)) {
navigation_request->SetWaitingForRendererResponse();
frame_tree_node->current_frame_host()->DispatchBeforeUnload(
true, reload_type != ReloadType::NONE);
} else {
navigation_request->BeginNavigation();
}
}
void NavigatorImpl::RecordNavigationMetrics(
const LoadCommittedDetails& details,
const FrameHostMsg_DidCommitProvisionalLoad_Params& params,
SiteInstance* site_instance) {
DCHECK(site_instance->HasProcess());
if (!details.is_main_frame || !navigation_data_ ||
navigation_data_->url_job_start_time_.is_null() ||
navigation_data_->url_ != params.original_request_url) {
return;
}
base::TimeDelta time_to_commit =
base::TimeTicks::Now() - navigation_data_->start_time_;
UMA_HISTOGRAM_TIMES("Navigation.TimeToCommit", time_to_commit);
time_to_commit -= navigation_data_->before_unload_delay_;
base::TimeDelta time_to_network = navigation_data_->url_job_start_time_ -
navigation_data_->start_time_ -
navigation_data_->before_unload_delay_;
if (navigation_data_->is_restoring_from_last_session_) {
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToCommit_SessionRestored_BeforeUnloadDiscounted",
time_to_commit);
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToURLJobStart_SessionRestored_BeforeUnloadDiscounted",
time_to_network);
navigation_data_.reset();
return;
}
bool navigation_created_new_renderer_process =
site_instance->GetProcess()->GetInitTimeForNavigationMetrics() >
navigation_data_->start_time_;
if (navigation_created_new_renderer_process) {
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToCommit_NewRenderer_BeforeUnloadDiscounted",
time_to_commit);
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToURLJobStart_NewRenderer_BeforeUnloadDiscounted",
time_to_network);
} else {
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToCommit_ExistingRenderer_BeforeUnloadDiscounted",
time_to_commit);
UMA_HISTOGRAM_TIMES(
"Navigation.TimeToURLJobStart_ExistingRenderer_BeforeUnloadDiscounted",
time_to_network);
}
navigation_data_.reset();
}
void NavigatorImpl::DidStartMainFrameNavigation(
const GURL& url,
SiteInstanceImpl* site_instance,
NavigationHandleImpl* navigation_handle) {
// If there is no browser-initiated pending entry for this navigation and it
// is not for the error URL, create a pending entry using the current
// SiteInstance, and ensure the address bar updates accordingly. We don't
// know the referrer or extra headers at this point, but the referrer will
// be set properly upon commit.
NavigationEntryImpl* pending_entry = controller_->GetPendingEntry();
bool has_browser_initiated_pending_entry =
pending_entry && !pending_entry->is_renderer_initiated();
// If there is a transient entry, creating a new pending entry will result
// in deleting it, which leads to inconsistent state.
bool has_transient_entry = !!controller_->GetTransientEntry();
if (!has_browser_initiated_pending_entry && !has_transient_entry) {
std::unique_ptr<NavigationEntryImpl> entry =
NavigationEntryImpl::FromNavigationEntry(
controller_->CreateNavigationEntry(
url, content::Referrer(), ui::PAGE_TRANSITION_LINK,
true /* is_renderer_initiated */, std::string(),
controller_->GetBrowserContext()));
entry->set_site_instance(site_instance);
// TODO(creis): If there's a pending entry already, find a safe way to
// update it instead of replacing it and copying over things like this.
// That will allow us to skip the NavigationHandle update below as well.
if (pending_entry) {
entry->set_transferred_global_request_id(
pending_entry->transferred_global_request_id());
entry->set_should_replace_entry(pending_entry->should_replace_entry());
entry->SetRedirectChain(pending_entry->GetRedirectChain());
}
// If there's a current NavigationHandle, update its pending NavEntry ID.
// This is necessary for transfer navigations. The handle may be null in
// PlzNavigate.
if (navigation_handle)
navigation_handle->update_entry_id_for_transfer(entry->GetUniqueID());
controller_->SetPendingEntry(std::move(entry));
if (delegate_)
delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
}
}
} // namespace content