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// Copyright 2019 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 "third_party/blink/renderer/core/loader/frame_resource_fetcher_properties.h"
#include "base/metrics/field_trial_params.h"
#include "third_party/blink/public/platform/modules/service_worker/web_service_worker_network_provider.h"
#include "third_party/blink/public/platform/web_effective_connection_type.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/settings.h"
#include "third_party/blink/renderer/core/loader/document_loader.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/script/fetch_client_settings_object_impl.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_client_settings_object.h"
#include "third_party/blink/renderer/platform/loader/fetch/fetch_client_settings_object_snapshot.h"
#include "third_party/blink/renderer/platform/network/network_state_notifier.h"
namespace blink {
namespace {
// Feature for throttling field trial.
const base::Feature kResourceLoadThrottlingTrial{
"ResourceLoadScheduler", base::FEATURE_DISABLED_BY_DEFAULT};
// Field trial parameters.
// Note: bg_limit is supported on m61+, but bg_sub_limit is only on m63+.
// If bg_sub_limit param is not found, we should use bg_limit to make the
// study result statistically correct.
constexpr base::FeatureParam<int> kOutstandingLimitForBackgroundMainFrame{
&kResourceLoadThrottlingTrial, "bg_limit", 3};
constexpr base::FeatureParam<int> kOutstandingLimitForBackgroundSubFrame{
&kResourceLoadThrottlingTrial, "bg_sub_limit", 2};
} // namespace
FrameResourceFetcherProperties::FrameResourceFetcherProperties(
DocumentLoader& document_loader,
Document& document)
: document_loader_(document_loader),
document_(document),
fetch_client_settings_object_(
MakeGarbageCollected<FetchClientSettingsObjectImpl>(
*document.domWindow())),
web_bundle_physical_url_(document_loader.WebBundlePhysicalUrl()) {}
void FrameResourceFetcherProperties::Trace(Visitor* visitor) const {
visitor->Trace(document_loader_);
visitor->Trace(document_);
visitor->Trace(fetch_client_settings_object_);
ResourceFetcherProperties::Trace(visitor);
}
bool FrameResourceFetcherProperties::IsMainFrame() const {
LocalFrame* frame = document_->GetFrame();
DCHECK(frame);
return frame->IsMainFrame();
}
mojom::ControllerServiceWorkerMode
FrameResourceFetcherProperties::GetControllerServiceWorkerMode() const {
auto* service_worker_network_provider =
document_loader_->GetServiceWorkerNetworkProvider();
if (!service_worker_network_provider)
return blink::mojom::ControllerServiceWorkerMode::kNoController;
return service_worker_network_provider->GetControllerServiceWorkerMode();
}
int64_t FrameResourceFetcherProperties::ServiceWorkerId() const {
DCHECK_NE(GetControllerServiceWorkerMode(),
blink::mojom::ControllerServiceWorkerMode::kNoController);
auto* service_worker_network_provider =
document_loader_->GetServiceWorkerNetworkProvider();
DCHECK(service_worker_network_provider);
return service_worker_network_provider->ControllerServiceWorkerID();
}
bool FrameResourceFetcherProperties::IsPaused() const {
LocalFrame* frame = document_->GetFrame();
DCHECK(frame);
return frame->GetPage()->Paused();
}
LoaderFreezeMode FrameResourceFetcherProperties::FreezeMode() const {
LocalFrame* frame = document_->GetFrame();
DCHECK(frame);
return frame->GetLoaderFreezeMode();
}
bool FrameResourceFetcherProperties::IsLoadComplete() const {
return document_->LoadEventFinished();
}
bool FrameResourceFetcherProperties::ShouldBlockLoadingSubResource() const {
LocalFrame* frame = document_->GetFrame();
DCHECK(frame);
return document_loader_ != frame->Loader().GetDocumentLoader();
}
bool FrameResourceFetcherProperties::IsSubframeDeprioritizationEnabled() const {
LocalFrame* frame = document_->GetFrame();
DCHECK(frame);
Settings* settings = frame->GetSettings();
if (!settings) {
return false;
}
const WebEffectiveConnectionType max_effective_connection_type_threshold =
settings->GetLowPriorityIframesThreshold();
if (max_effective_connection_type_threshold <=
WebEffectiveConnectionType::kTypeOffline) {
return false;
}
const WebEffectiveConnectionType effective_connection_type =
GetNetworkStateNotifier().EffectiveType();
if (effective_connection_type <= WebEffectiveConnectionType::kTypeOffline) {
return false;
}
if (effective_connection_type > max_effective_connection_type_threshold) {
// Network is not slow enough.
return false;
}
return true;
}
scheduler::FrameStatus FrameResourceFetcherProperties::GetFrameStatus() const {
LocalFrame* frame = document_->GetFrame();
DCHECK(frame);
return scheduler::GetFrameStatus(frame->GetFrameScheduler());
}
const KURL& FrameResourceFetcherProperties::WebBundlePhysicalUrl() const {
return web_bundle_physical_url_;
}
int FrameResourceFetcherProperties::GetOutstandingThrottledLimit() const {
static const int main_frame_limit =
kOutstandingLimitForBackgroundMainFrame.Get();
static const int sub_frame_limit =
kOutstandingLimitForBackgroundSubFrame.Get();
return IsMainFrame() ? main_frame_limit : sub_frame_limit;
}
scoped_refptr<SecurityOrigin>
FrameResourceFetcherProperties::GetLitePageSubresourceRedirectOrigin() const {
return SecurityOrigin::CreateFromString(
document_->GetSettings()->GetLitePageSubresourceRedirectOrigin());
}
} // namespace blink
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