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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/preloading/prefetch/prefetch_network_context.h"
#include "base/command_line.h"
#include "base/memory/scoped_refptr.h"
#include "components/embedder_support/user_agent_utils.h"
#include "content/browser/loader/url_loader_factory_utils.h"
#include "content/browser/preloading/prefetch/prefetch_network_context_client.h"
#include "content/browser/preloading/prefetch/prefetch_proxy_configurator.h"
#include "content/browser/preloading/prefetch/prefetch_service.h"
#include "content/browser/preloading/prefetch/prefetch_type.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/child_process_host.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/global_routing_id.h"
#include "content/public/browser/network_service_instance.h"
#include "content/public/browser/prefetch_service_delegate.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/common/content_switches.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "net/base/isolation_info.h"
#include "services/cert_verifier/public/mojom/cert_verifier_service_factory.mojom.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/mojom/cookie_manager.mojom.h"
#include "services/network/public/mojom/network_context.mojom.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "third_party/blink/public/common/navigation/preloading_headers.h"
namespace content {
PrefetchNetworkContext::PrefetchNetworkContext(
bool use_isolated_network_context,
const PrefetchType& prefetch_type,
const GlobalRenderFrameHostId& referring_render_frame_host_id,
const std::optional<url::Origin>& referring_origin)
: use_isolated_network_context_(use_isolated_network_context),
prefetch_type_(prefetch_type),
referring_render_frame_host_id_(referring_render_frame_host_id),
referring_origin_(referring_origin) {
if (prefetch_type_.IsRendererInitiated()) {
CHECK(referring_render_frame_host_id);
} else {
CHECK(!referring_render_frame_host_id);
}
}
PrefetchNetworkContext::~PrefetchNetworkContext() = default;
scoped_refptr<network::SharedURLLoaderFactory>
PrefetchNetworkContext::GetURLLoaderFactory(PrefetchService* service) {
if (!url_loader_factory_) {
if (use_isolated_network_context_) {
CreateIsolatedURLLoaderFactory(service);
CHECK(network_context_);
} else {
// Create new URL factory in the default network context.
url_loader_factory_ = CreateNewURLLoaderFactory(
service->GetBrowserContext(), service->GetBrowserContext()
->GetDefaultStoragePartition()
->GetNetworkContext());
}
}
CHECK(url_loader_factory_);
return url_loader_factory_;
}
network::mojom::CookieManager* PrefetchNetworkContext::GetCookieManager() {
CHECK(use_isolated_network_context_);
CHECK(network_context_);
if (!cookie_manager_)
network_context_->GetCookieManager(
cookie_manager_.BindNewPipeAndPassReceiver());
return cookie_manager_.get();
}
void PrefetchNetworkContext::CloseIdleConnections() {
if (network_context_)
network_context_->CloseIdleConnections(base::DoNothing());
}
void PrefetchNetworkContext::CreateIsolatedURLLoaderFactory(
PrefetchService* service) {
CHECK(use_isolated_network_context_);
network_context_.reset();
url_loader_factory_.reset();
PrefetchServiceDelegate* delegate = service->GetPrefetchServiceDelegate();
auto context_params = network::mojom::NetworkContextParams::New();
context_params->file_paths = network::mojom::NetworkContextFilePaths::New();
context_params->user_agent = embedder_support::GetUserAgent();
// The verifier created here does not have the same parameters as used in the
// profile (where additional parameters are added in
// chrome/browser/net/profile_network_context_service.h
// ProfileNetworkContextService::ConfigureNetworkContextParamsInternal, as
// well as updates in ProfileNetworkContextService::UpdateCertificatePolicy).
//
// Currently this does not cause problems as additional parameters only ensure
// more requests validate, so the only harm is that prefetch requests will
// fail and then later succeed when they are actually fetched. In the future
// when additional parameters can cause validations to fail, this will cause
// problems.
//
// TODO(crbug.com/40928765): figure out how to get this verifier in sync with
// the profile verifier.
context_params->cert_verifier_params = GetCertVerifierParams(
cert_verifier::mojom::CertVerifierCreationParams::New());
context_params->cors_exempt_header_list = {blink::kPurposeHeaderName};
context_params->cookie_manager_params =
network::mojom::CookieManagerParams::New();
if (delegate) {
context_params->accept_language = delegate->GetAcceptLanguageHeader();
}
context_params->http_cache_enabled = true;
CHECK(!context_params->file_paths->http_cache_directory);
if (prefetch_type_.IsProxyRequiredWhenCrossOrigin() &&
!prefetch_type_.IsProxyBypassedForTesting()) {
PrefetchProxyConfigurator* prefetch_proxy_configurator =
service->GetPrefetchProxyConfigurator();
CHECK(prefetch_proxy_configurator);
context_params->initial_custom_proxy_config =
prefetch_proxy_configurator->CreateCustomProxyConfig();
context_params->custom_proxy_connection_observer_remote =
prefetch_proxy_configurator->NewProxyConnectionObserverRemote();
// Register a client config receiver so that updates to the set of proxy
// hosts or proxy headers will be updated.
mojo::Remote<network::mojom::CustomProxyConfigClient> config_client;
context_params->custom_proxy_config_client_receiver =
config_client.BindNewPipeAndPassReceiver();
prefetch_proxy_configurator->AddCustomProxyConfigClient(
std::move(config_client), base::DoNothing());
}
// Explicitly disallow network service features which could cause a privacy
// leak.
context_params->enable_certificate_reporting = false;
context_params->enable_domain_reliability = false;
CreateNetworkContextInNetworkService(
network_context_.BindNewPipeAndPassReceiver(), std::move(context_params));
if (prefetch_type_.IsProxyRequiredWhenCrossOrigin() &&
!prefetch_type_.IsProxyBypassedForTesting()) {
// Configure a context client to ensure Web Reports and other privacy leak
// surfaces won't be enabled.
mojo::PendingRemote<network::mojom::NetworkContextClient> client_remote;
mojo::MakeSelfOwnedReceiver(
std::make_unique<PrefetchNetworkContextClient>(),
client_remote.InitWithNewPipeAndPassReceiver());
network_context_->SetClient(std::move(client_remote));
}
url_loader_factory_ = CreateNewURLLoaderFactory(service->GetBrowserContext(),
network_context_.get());
}
scoped_refptr<network::SharedURLLoaderFactory>
PrefetchNetworkContext::CreateNewURLLoaderFactory(
BrowserContext* browser_context,
network::mojom::NetworkContext* network_context) {
CHECK(network_context);
RenderFrameHost* referring_render_frame_host =
RenderFrameHost::FromID(referring_render_frame_host_id_);
int referring_render_process_id;
ukm::SourceIdObj ukm_source_id;
if (prefetch_type_.IsRendererInitiated()) {
CHECK(referring_render_frame_host);
// Prerender should not trigger any prefetch. This assumption is needed to
// call GetPageUkmSourceId.
CHECK(!referring_render_frame_host->IsInLifecycleState(
RenderFrameHost::LifecycleState::kPrerendering));
referring_render_process_id =
referring_render_frame_host->GetProcess()->GetDeprecatedID();
ukm_source_id = ukm::SourceIdObj::FromInt64(
referring_render_frame_host->GetPageUkmSourceId());
} else {
CHECK(!referring_render_frame_host);
referring_render_process_id = content::ChildProcessHost::kInvalidUniqueID;
ukm_source_id = ukm::kInvalidSourceIdObj;
}
bool bypass_redirect_checks = false;
auto factory_params = network::mojom::URLLoaderFactoryParams::New();
factory_params->process_id = network::mojom::kBrowserProcessId;
factory_params->is_trusted = true;
factory_params->is_orb_enabled = false;
return url_loader_factory::Create(
ContentBrowserClient::URLLoaderFactoryType::kPrefetch,
url_loader_factory::TerminalParams::ForNetworkContext(
network_context, std::move(factory_params),
url_loader_factory::HeaderClientOption::kAllow),
url_loader_factory::ContentClientParams(
browser_context, referring_render_frame_host,
referring_render_process_id,
referring_origin_.value_or(url::Origin()), net::IsolationInfo(),
ukm_source_id, &bypass_redirect_checks));
}
} // namespace content
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