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content / browser / web_package / signed_exchange_loader.cc [blame]
// Copyright 2018 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/web_package/signed_exchange_loader.h"
#include <memory>
#include <optional>
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/metrics/histogram_macros.h"
#include "components/web_package/web_bundle_utils.h"
#include "content/browser/web_package/prefetched_signed_exchange_cache_entry.h"
#include "content/browser/web_package/signed_exchange_cert_fetcher_factory.h"
#include "content/browser/web_package/signed_exchange_devtools_proxy.h"
#include "content/browser/web_package/signed_exchange_handler.h"
#include "content/browser/web_package/signed_exchange_reporter.h"
#include "content/browser/web_package/signed_exchange_utils.h"
#include "content/public/common/content_features.h"
#include "net/base/load_flags.h"
#include "net/base/net_errors.h"
#include "net/cert/cert_status_flags.h"
#include "net/http/http_util.h"
#include "net/url_request/redirect_util.h"
#include "services/network/public/cpp/constants.h"
#include "services/network/public/cpp/data_pipe_to_source_stream.h"
#include "services/network/public/cpp/features.h"
#include "services/network/public/cpp/is_potentially_trustworthy.h"
#include "services/network/public/cpp/record_ontransfersizeupdate_utils.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/source_stream_to_data_pipe.h"
#include "services/network/public/cpp/url_loader_completion_status.h"
#include "services/network/public/mojom/early_hints.mojom.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "third_party/blink/public/common/web_package/web_package_request_matcher.h"
#include "url/origin.h"
namespace content {
namespace {
constexpr char kPrefetchLoadResultHistogram[] =
"SignedExchange.Prefetch.LoadResult2";
SignedExchangeHandlerFactory* g_signed_exchange_factory_for_testing_ = nullptr;
net::IsolationInfo CreateIsolationInfoForCertFetch(
const network::ResourceRequest& outer_request) {
if (!outer_request.trusted_params ||
outer_request.trusted_params->isolation_info.IsEmpty()) {
return net::IsolationInfo();
}
return net::IsolationInfo::Create(
net::IsolationInfo::RequestType::kOther,
*outer_request.trusted_params->isolation_info.top_frame_origin(),
*outer_request.trusted_params->isolation_info.frame_origin(),
net::SiteForCookies());
}
} // namespace
SignedExchangeLoader::SignedExchangeLoader(
const network::ResourceRequest& outer_request,
network::mojom::URLResponseHeadPtr outer_response_head,
mojo::ScopedDataPipeConsumerHandle outer_response_body,
mojo::PendingRemote<network::mojom::URLLoaderClient> forwarding_client,
network::mojom::URLLoaderClientEndpointsPtr endpoints,
uint32_t url_loader_options,
bool should_redirect_on_failure,
std::unique_ptr<SignedExchangeDevToolsProxy> devtools_proxy,
std::unique_ptr<SignedExchangeReporter> reporter,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
URLLoaderThrottlesGetter url_loader_throttles_getter,
FrameTreeNodeId frame_tree_node_id,
const std::string& accept_langs,
bool keep_entry_for_prefetch_cache)
: outer_request_(outer_request),
outer_response_head_(std::move(outer_response_head)),
forwarding_client_(std::move(forwarding_client)),
reporter_(std::move(reporter)),
url_loader_options_(url_loader_options),
should_redirect_on_failure_(should_redirect_on_failure) {
DCHECK(outer_request_.url.is_valid());
DCHECK(outer_response_body);
if (keep_entry_for_prefetch_cache) {
cache_entry_ = std::make_unique<PrefetchedSignedExchangeCacheEntry>();
cache_entry_->SetOuterUrl(outer_request_.url);
cache_entry_->SetOuterResponse(outer_response_head_->Clone());
} else {
// `outer_request` corresponds to a navigation, so we expect the
// TrustedParams and IsolationInfo to be set.
CHECK(outer_request.trusted_params.has_value());
}
url_loader_.Bind(std::move(endpoints->url_loader));
auto cert_fetcher_factory = SignedExchangeCertFetcherFactory::Create(
std::move(url_loader_factory), std::move(url_loader_throttles_getter),
outer_request_.throttling_profile_id,
CreateIsolationInfoForCertFetch(outer_request_),
outer_request_.request_initiator);
if (g_signed_exchange_factory_for_testing_) {
signed_exchange_handler_ = g_signed_exchange_factory_for_testing_->Create(
outer_request_.url,
std::make_unique<network::DataPipeToSourceStream>(
std::move(outer_response_body)),
base::BindOnce(&SignedExchangeLoader::OnHTTPExchangeFound,
weak_factory_.GetWeakPtr()),
std::move(cert_fetcher_factory));
} else {
// Can't use HttpResponseHeaders::GetMimeType() because
// SignedExchangeHandler checks "v=" parameter.
std::optional<std::string_view> content_type =
outer_response_head_->headers->EnumerateHeader(nullptr, "content-type");
signed_exchange_handler_ = std::make_unique<SignedExchangeHandler>(
network::IsUrlPotentiallyTrustworthy(outer_request_.url),
web_package::HasNoSniffHeader(*outer_response_head_),
content_type.value_or(std::string_view()),
std::make_unique<network::DataPipeToSourceStream>(
std::move(outer_response_body)),
base::BindOnce(&SignedExchangeLoader::OnHTTPExchangeFound,
weak_factory_.GetWeakPtr()),
std::move(cert_fetcher_factory),
keep_entry_for_prefetch_cache
? std::nullopt
: std::make_optional(outer_request_.trusted_params->isolation_info),
outer_request_.load_flags, outer_response_head_->remote_endpoint,
std::make_unique<blink::WebPackageRequestMatcher>(
outer_request_.headers, accept_langs),
std::move(devtools_proxy), reporter_.get(), frame_tree_node_id);
}
// Bind the endpoint with |this| to get the body DataPipe.
url_loader_client_receiver_.Bind(std::move(endpoints->url_loader_client));
// |client_| will be bound with a forwarding client by ConnectToClient().
pending_client_receiver_ = client_.BindNewPipeAndPassReceiver();
}
SignedExchangeLoader::~SignedExchangeLoader() = default;
void SignedExchangeLoader::OnReceiveEarlyHints(
network::mojom::EarlyHintsPtr early_hints) {
NOTREACHED_IN_MIGRATION();
}
void SignedExchangeLoader::OnReceiveResponse(
network::mojom::URLResponseHeadPtr response_head,
mojo::ScopedDataPipeConsumerHandle body,
std::optional<mojo_base::BigBuffer> cached_metadata) {
// Must not be called because this SignedExchangeLoader and the client
// endpoints were bound after OnReceiveResponse() is called.
NOTREACHED_IN_MIGRATION();
}
void SignedExchangeLoader::OnReceiveRedirect(
const net::RedirectInfo& redirect_info,
network::mojom::URLResponseHeadPtr response_head) {
// Must not be called because this SignedExchangeLoader and the client
// endpoints were bound after OnReceiveResponse() is called.
NOTREACHED_IN_MIGRATION();
}
void SignedExchangeLoader::OnUploadProgress(
int64_t current_position,
int64_t total_size,
OnUploadProgressCallback ack_callback) {
// Must not be called because this SignedExchangeLoader and the client
// endpoints were bound after OnReceiveResponse() is called.
NOTREACHED_IN_MIGRATION();
}
void SignedExchangeLoader::OnTransferSizeUpdated(int32_t transfer_size_diff) {
// TODO(crbug.com/40558902): Implement this to progressively update the
// encoded data length in DevTools.
network::RecordOnTransferSizeUpdatedUMA(
network::OnTransferSizeUpdatedFrom::kSignedExchangeLoader);
}
void SignedExchangeLoader::OnComplete(
const network::URLLoaderCompletionStatus& status) {
DCHECK(!outer_response_length_info_);
outer_response_length_info_ = OuterResponseLengthInfo();
outer_response_length_info_->encoded_data_length = status.encoded_data_length;
outer_response_length_info_->decoded_body_length = status.decoded_body_length;
NotifyClientOnCompleteIfReady();
}
void SignedExchangeLoader::FollowRedirect(
const std::vector<std::string>& removed_headers,
const net::HttpRequestHeaders& modified_headers,
const net::HttpRequestHeaders& modified_cors_exempt_headers,
const std::optional<GURL>& new_url) {
NOTREACHED_IN_MIGRATION();
}
void SignedExchangeLoader::SetPriority(net::RequestPriority priority,
int intra_priority_value) {
url_loader_->SetPriority(priority, intra_priority_value);
}
void SignedExchangeLoader::PauseReadingBodyFromNet() {
url_loader_->PauseReadingBodyFromNet();
}
void SignedExchangeLoader::ResumeReadingBodyFromNet() {
url_loader_->ResumeReadingBodyFromNet();
}
void SignedExchangeLoader::ConnectToClient(
mojo::PendingRemote<network::mojom::URLLoaderClient> client) {
DCHECK(pending_client_receiver_.is_valid());
mojo::FusePipes(std::move(pending_client_receiver_), std::move(client));
}
std::unique_ptr<PrefetchedSignedExchangeCacheEntry>
SignedExchangeLoader::TakePrefetchedSignedExchangeCacheEntry() {
DCHECK(cache_entry_);
return std::move(cache_entry_);
}
void SignedExchangeLoader::OnHTTPExchangeFound(
SignedExchangeLoadResult result,
net::Error error,
const GURL& request_url,
network::mojom::URLResponseHeadPtr resource_response,
std::unique_ptr<net::SourceStream> payload_stream) {
if (error) {
DCHECK_NE(result, SignedExchangeLoadResult::kSuccess);
ReportLoadResult(result);
if (error != net::ERR_INVALID_SIGNED_EXCHANGE ||
!should_redirect_on_failure_ || !request_url.is_valid()) {
// Let the request fail.
// This will eventually delete |this|.
forwarding_client_->OnComplete(network::URLLoaderCompletionStatus(error));
return;
}
// Make a fallback redirect to |request_url|.
DCHECK(!fallback_url_);
fallback_url_ = request_url;
forwarding_client_->OnReceiveRedirect(
signed_exchange_utils::CreateRedirectInfo(
request_url, outer_request_, *outer_response_head_,
true /* is_fallback_redirect */),
signed_exchange_utils::CreateRedirectResponseHead(
*outer_response_head_, true /* is_fallback_redirect */));
forwarding_client_.reset();
return;
}
DCHECK_EQ(result, SignedExchangeLoadResult::kSuccess);
inner_request_url_ = request_url;
if (cache_entry_) {
cache_entry_->SetInnerUrl(*inner_request_url_);
auto inner_response_for_cache = resource_response->Clone();
inner_response_for_cache->was_fetched_via_cache = true;
inner_response_for_cache->was_in_prefetch_cache = true;
cache_entry_->SetInnerResponse(std::move(inner_response_for_cache));
const bool get_info_result =
signed_exchange_handler_->GetSignedExchangeInfoForPrefetchCache(
*cache_entry_);
DCHECK(get_info_result);
}
forwarding_client_->OnReceiveRedirect(
signed_exchange_utils::CreateRedirectInfo(
request_url, outer_request_, *outer_response_head_,
false /* is_fallback_redirect */),
signed_exchange_utils::CreateRedirectResponseHead(
*outer_response_head_, false /* is_fallback_redirect */));
forwarding_client_.reset();
const std::optional<net::SSLInfo>& ssl_info = resource_response->ssl_info;
if (ssl_info.has_value() &&
(url_loader_options_ &
network::mojom::kURLLoadOptionSendSSLInfoForCertificateError) &&
net::IsCertStatusError(ssl_info->cert_status)) {
ssl_info_ = ssl_info;
}
network::mojom::URLResponseHeadPtr inner_response_head_shown_to_client =
std::move(resource_response);
if (ssl_info.has_value() &&
!(url_loader_options_ &
network::mojom::kURLLoadOptionSendSSLInfoWithResponse)) {
inner_response_head_shown_to_client->ssl_info = std::nullopt;
}
inner_response_head_shown_to_client->was_fetched_via_cache =
outer_response_head_->was_fetched_via_cache;
// Currently we always assume that we have body.
// TODO(crbug.com/40558879): Add error handling and bail out
// earlier if there's an error.
mojo::ScopedDataPipeProducerHandle producer_handle;
mojo::ScopedDataPipeConsumerHandle consumer_handle;
MojoCreateDataPipeOptions options;
options.struct_size = sizeof(MojoCreateDataPipeOptions);
options.flags = MOJO_CREATE_DATA_PIPE_FLAG_NONE;
options.element_num_bytes = 1;
options.capacity_num_bytes =
network::features::GetDataPipeDefaultAllocationSize();
if (mojo::CreateDataPipe(&options, producer_handle, consumer_handle) !=
MOJO_RESULT_OK) {
forwarding_client_->OnComplete(
network::URLLoaderCompletionStatus(net::ERR_INSUFFICIENT_RESOURCES));
return;
}
client_->OnReceiveResponse(std::move(inner_response_head_shown_to_client),
std::move(consumer_handle), std::nullopt);
body_data_pipe_adapter_ = std::make_unique<network::SourceStreamToDataPipe>(
std::move(payload_stream), std::move(producer_handle));
// Start reading.
body_data_pipe_adapter_->Start(base::BindOnce(
&SignedExchangeLoader::FinishReadingBody, base::Unretained(this)));
}
void SignedExchangeLoader::FinishReadingBody(int result) {
DCHECK(!decoded_body_read_result_);
decoded_body_read_result_ = result;
NotifyClientOnCompleteIfReady();
}
void SignedExchangeLoader::NotifyClientOnCompleteIfReady() {
// If |outer_response_length_info_| or |decoded_body_read_result_| is
// unavailable, do nothing and rely on the subsequent call to notify client.
if (!outer_response_length_info_ || !decoded_body_read_result_)
return;
ReportLoadResult(*decoded_body_read_result_ == net::OK
? SignedExchangeLoadResult::kSuccess
: SignedExchangeLoadResult::kMerkleIntegrityError);
network::URLLoaderCompletionStatus status;
status.error_code = *decoded_body_read_result_;
status.completion_time = base::TimeTicks::Now();
status.encoded_data_length = outer_response_length_info_->encoded_data_length;
status.encoded_body_length =
outer_response_length_info_->decoded_body_length -
signed_exchange_handler_->GetExchangeHeaderLength();
status.decoded_body_length = body_data_pipe_adapter_->TransferredBytes();
if (ssl_info_) {
DCHECK((url_loader_options_ &
network::mojom::kURLLoadOptionSendSSLInfoForCertificateError) &&
net::IsCertStatusError(ssl_info_->cert_status));
status.ssl_info = *ssl_info_;
}
// This will eventually delete |this|.
client_->OnComplete(status);
}
void SignedExchangeLoader::ReportLoadResult(SignedExchangeLoadResult result) {
signed_exchange_utils::RecordLoadResultHistogram(result);
if (outer_request_.load_flags & net::LOAD_PREFETCH) {
UMA_HISTOGRAM_ENUMERATION(kPrefetchLoadResultHistogram, result);
}
if (reporter_)
reporter_->ReportLoadResultAndFinish(result);
}
void SignedExchangeLoader::SetSignedExchangeHandlerFactoryForTest(
SignedExchangeHandlerFactory* factory) {
g_signed_exchange_factory_for_testing_ = factory;
}
} // namespace content