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content / browser / web_package / signed_exchange_inner_response_url_loader.cc [blame]
// Copyright 2024 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_inner_response_url_loader.h"
#include <stdint.h>
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/notreached.h"
#include "content/browser/loader/cross_origin_read_blocking_checker.h"
#include "content/public/browser/browser_thread.h"
#include "mojo/public/cpp/system/data_pipe.h"
#include "net/base/net_errors.h"
#include "services/network/public/cpp/cors/cors.h"
#include "services/network/public/cpp/features.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "storage/browser/blob/blob_data_handle.h"
#include "storage/browser/blob/mojo_blob_reader.h"
namespace content {
namespace {
// A utility subclass of MojoBlobReader::Delegate that calls the passed callback
// in OnComplete().
class MojoBlobReaderDelegate : public storage::MojoBlobReader::Delegate {
public:
explicit MojoBlobReaderDelegate(base::OnceCallback<void(net::Error)> callback)
: callback_(std::move(callback)) {}
private:
// storage::MojoBlobReader::Delegate
RequestSideData DidCalculateSize(uint64_t total_size,
uint64_t content_size) override {
return DONT_REQUEST_SIDE_DATA;
}
void OnComplete(net::Error result, uint64_t total_written_bytes) override {
std::move(callback_).Run(result);
}
base::OnceCallback<void(net::Error)> callback_;
};
} // namespace
SignedExchangeInnerResponseURLLoader::SignedExchangeInnerResponseURLLoader(
const network::ResourceRequest& request,
network::mojom::URLResponseHeadPtr inner_response,
std::unique_ptr<const storage::BlobDataHandle> blob_data_handle,
const network::URLLoaderCompletionStatus& completion_status,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
bool is_navigation_request,
scoped_refptr<base::RefCountedData<network::orb::PerFactoryState>>
orb_state)
: response_(std::move(inner_response)),
blob_data_handle_(std::move(blob_data_handle)),
completion_status_(completion_status),
client_(std::move(client)),
orb_state_(std::move(orb_state)) {
DCHECK(response_->headers);
// The `request.request_initiator` is assumed to be present and trustworthy
// - it comes either from:
// 1, The trustworthy navigation stack (via
// PrefetchedNavigationLoaderInterceptor::StartInnerResponse).
// or
// 2. SubresourceSignedExchangeURLLoaderFactory::CreateLoaderAndStart which
// validates the untrustworthy IPC payload as its very first action.
DCHECK(request.request_initiator);
// Keep the SSLInfo only when the request is for main frame main resource,
// or devtools_request_id is set. Users can inspect the certificate for the
// main frame using the info bubble in Omnibox, and for the subresources in
// DevTools' Security panel.
if (request.destination != network::mojom::RequestDestination::kDocument &&
!request.devtools_request_id) {
response_->ssl_info = std::nullopt;
}
UpdateRequestResponseStartTime(response_.get());
response_->encoded_data_length = 0;
if (is_navigation_request) {
SendResponseBody();
return;
}
if (network::cors::ShouldCheckCors(request.url, request.request_initiator,
request.mode)) {
const auto result = network::cors::CheckAccessAndReportMetrics(
request.url,
GetHeaderString(*response_,
network::cors::header_names::kAccessControlAllowOrigin),
GetHeaderString(
*response_,
network::cors::header_names::kAccessControlAllowCredentials),
request.credentials_mode, *request.request_initiator);
if (!result.has_value()) {
client_->OnComplete(network::URLLoaderCompletionStatus(result.error()));
return;
}
}
orb_checker_ = std::make_unique<CrossOriginReadBlockingChecker>(
request, *response_, *blob_data_handle_, &orb_state_->data,
base::BindOnce(&SignedExchangeInnerResponseURLLoader::
OnCrossOriginReadBlockingCheckComplete,
base::Unretained(this)));
}
SignedExchangeInnerResponseURLLoader::~SignedExchangeInnerResponseURLLoader() =
default;
// static
std::optional<std::string>
SignedExchangeInnerResponseURLLoader::GetHeaderString(
const network::mojom::URLResponseHead& response,
const std::string& header_name) {
DCHECK(response.headers);
return response.headers->GetNormalizedHeader(header_name);
}
void SignedExchangeInnerResponseURLLoader::
OnCrossOriginReadBlockingCheckComplete(
CrossOriginReadBlockingChecker::Result result) {
switch (result) {
case CrossOriginReadBlockingChecker::Result::kAllowed:
SendResponseBody();
return;
case CrossOriginReadBlockingChecker::Result::kNetError:
client_->OnComplete(
network::URLLoaderCompletionStatus(orb_checker_->GetNetError()));
return;
case CrossOriginReadBlockingChecker::Result::kBlocked_ShouldReport:
break;
case CrossOriginReadBlockingChecker::Result::kBlocked_ShouldNotReport:
break;
}
// Send sanitized response.
network::orb::SanitizeBlockedResponseHeaders(*response_);
// Send an empty response's body.
mojo::ScopedDataPipeProducerHandle pipe_producer_handle;
mojo::ScopedDataPipeConsumerHandle pipe_consumer_handle;
MojoResult rv =
mojo::CreateDataPipe(nullptr, pipe_producer_handle, pipe_consumer_handle);
if (rv != MOJO_RESULT_OK) {
client_->OnComplete(
network::URLLoaderCompletionStatus(net::ERR_INSUFFICIENT_RESOURCES));
return;
}
client_->OnReceiveResponse(std::move(response_),
std::move(pipe_consumer_handle), std::nullopt);
// Send a dummy OnComplete message.
network::URLLoaderCompletionStatus status =
network::URLLoaderCompletionStatus(net::OK);
status.should_report_orb_blocking =
result == CrossOriginReadBlockingChecker::Result::kBlocked_ShouldReport;
client_->OnComplete(status);
}
void SignedExchangeInnerResponseURLLoader::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 SignedExchangeInnerResponseURLLoader::SetPriority(
net::RequestPriority priority,
int intra_priority_value) {
// There is nothing to do, because there is no prioritization mechanism for
// reading a blob.
}
void SignedExchangeInnerResponseURLLoader::PauseReadingBodyFromNet() {
// There is nothing to do, because we don't fetch the resource from the
// network.
}
void SignedExchangeInnerResponseURLLoader::ResumeReadingBodyFromNet() {
// There is nothing to do, because we don't fetch the resource from the
// network.
}
void SignedExchangeInnerResponseURLLoader::SendResponseBody() {
mojo::ScopedDataPipeProducerHandle pipe_producer_handle;
mojo::ScopedDataPipeConsumerHandle pipe_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();
MojoResult rv = mojo::CreateDataPipe(&options, pipe_producer_handle,
pipe_consumer_handle);
if (rv != MOJO_RESULT_OK) {
client_->OnComplete(
network::URLLoaderCompletionStatus(net::ERR_INSUFFICIENT_RESOURCES));
return;
}
GetIOThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(
&SignedExchangeInnerResponseURLLoader::CreateMojoBlobReader,
weak_factory_.GetWeakPtr(), std::move(pipe_producer_handle),
std::make_unique<storage::BlobDataHandle>(*blob_data_handle_)));
client_->OnReceiveResponse(std::move(response_),
std::move(pipe_consumer_handle), std::nullopt);
}
void SignedExchangeInnerResponseURLLoader::BlobReaderComplete(
net::Error result) {
network::URLLoaderCompletionStatus status;
if (result == net::OK) {
status = completion_status_;
status.exists_in_cache = true;
status.completion_time = base::TimeTicks::Now();
status.encoded_data_length = 0;
} else {
status = network::URLLoaderCompletionStatus(status);
}
client_->OnComplete(status);
}
// static
void SignedExchangeInnerResponseURLLoader::CreateMojoBlobReader(
base::WeakPtr<SignedExchangeInnerResponseURLLoader> loader,
mojo::ScopedDataPipeProducerHandle pipe_producer_handle,
std::unique_ptr<storage::BlobDataHandle> blob_data_handle) {
storage::MojoBlobReader::Create(
blob_data_handle.get(), net::HttpByteRange(),
std::make_unique<MojoBlobReaderDelegate>(base::BindOnce(
&SignedExchangeInnerResponseURLLoader::BlobReaderCompleteOnIO,
std::move(loader))),
std::move(pipe_producer_handle));
}
// static
void SignedExchangeInnerResponseURLLoader::BlobReaderCompleteOnIO(
base::WeakPtr<SignedExchangeInnerResponseURLLoader> loader,
net::Error result) {
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&SignedExchangeInnerResponseURLLoader::BlobReaderComplete,
std::move(loader), result));
}
// static
void SignedExchangeInnerResponseURLLoader::UpdateRequestResponseStartTime(
network::mojom::URLResponseHead* response_head) {
const base::TimeTicks now_ticks = base::TimeTicks::Now();
const base::Time now = base::Time::Now();
response_head->request_start = now_ticks;
response_head->response_start = now_ticks;
response_head->load_timing.request_start_time = now;
response_head->load_timing.request_start = now_ticks;
}
} // namespace content