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// Copyright 2021 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/aggregation_service/aggregatable_report_assembler.h"
#include <algorithm>
#include <memory>
#include <optional>
#include <utility>
#include "base/check.h"
#include "base/check_op.h"
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/memory/scoped_refptr.h"
#include "base/metrics/histogram_functions.h"
#include "base/time/default_clock.h"
#include "content/browser/aggregation_service/aggregatable_report.h"
#include "content/browser/aggregation_service/aggregation_service_key_fetcher.h"
#include "content/browser/aggregation_service/aggregation_service_network_fetcher_impl.h"
#include "content/browser/aggregation_service/aggregation_service_storage_context.h"
#include "content/browser/aggregation_service/public_key.h"
#include "content/public/browser/storage_partition.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace content {
namespace {
void RecordAssemblyStatus(AggregatableReportAssembler::AssemblyStatus status) {
base::UmaHistogramEnumeration(
"PrivacySandbox.AggregationService.ReportAssembler.Status", status);
}
} // namespace
AggregatableReportAssembler::AggregatableReportAssembler(
AggregationServiceStorageContext* storage_context,
StoragePartition* storage_partition)
: AggregatableReportAssembler(
std::make_unique<AggregationServiceKeyFetcher>(
storage_context,
std::make_unique<AggregationServiceNetworkFetcherImpl>(
base::DefaultClock::GetInstance(),
storage_partition)),
std::make_unique<AggregatableReport::Provider>()) {}
AggregatableReportAssembler::AggregatableReportAssembler(
AggregationServiceStorageContext* storage_context,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
bool enable_debug_logging)
: AggregatableReportAssembler(
std::make_unique<AggregationServiceKeyFetcher>(
storage_context,
AggregationServiceNetworkFetcherImpl::
CreateForTesting( // IN-TEST
base::DefaultClock::GetInstance(),
std::move(url_loader_factory),
enable_debug_logging)),
std::make_unique<AggregatableReport::Provider>()) {}
AggregatableReportAssembler::AggregatableReportAssembler(
std::unique_ptr<AggregationServiceKeyFetcher> fetcher,
std::unique_ptr<AggregatableReport::Provider> report_provider)
: fetcher_(std::move(fetcher)),
report_provider_(std::move(report_provider)) {}
AggregatableReportAssembler::~AggregatableReportAssembler() = default;
AggregatableReportAssembler::PendingRequest::PendingRequest(
AggregatableReportRequest report_request,
AggregatableReportAssembler::AssemblyCallback callback)
: report_request(std::move(report_request)), callback(std::move(callback)) {
CHECK(this->callback);
}
AggregatableReportAssembler::PendingRequest::PendingRequest(
AggregatableReportAssembler::PendingRequest&& other) = default;
AggregatableReportAssembler::PendingRequest&
AggregatableReportAssembler::PendingRequest::operator=(
AggregatableReportAssembler::PendingRequest&& other) = default;
AggregatableReportAssembler::PendingRequest::~PendingRequest() = default;
// static
std::unique_ptr<AggregatableReportAssembler>
AggregatableReportAssembler::CreateForTesting(
std::unique_ptr<AggregationServiceKeyFetcher> fetcher,
std::unique_ptr<AggregatableReport::Provider> report_provider) {
return base::WrapUnique(new AggregatableReportAssembler(
std::move(fetcher), std::move(report_provider)));
}
// static
std::unique_ptr<AggregatableReportAssembler>
AggregatableReportAssembler::CreateForTesting(
AggregationServiceStorageContext* storage_context,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
bool enable_debug_logging) {
return base::WrapUnique(new AggregatableReportAssembler(
storage_context, std::move(url_loader_factory), enable_debug_logging));
}
void AggregatableReportAssembler::AssembleReport(
AggregatableReportRequest report_request,
AssemblyCallback callback) {
const AggregationServicePayloadContents& contents =
report_request.payload_contents();
// Currently, this is the only supported operation.
CHECK_EQ(contents.operation,
AggregationServicePayloadContents::Operation::kHistogram);
if (pending_requests_.size() >= kMaxSimultaneousRequests) {
RecordAssemblyStatus(AssemblyStatus::kTooManySimultaneousRequests);
std::move(callback).Run(std::move(report_request), std::nullopt,
AssemblyStatus::kTooManySimultaneousRequests);
return;
}
int64_t id = unique_id_counter_++;
CHECK(!base::Contains(pending_requests_, id));
const PendingRequest& pending_request =
pending_requests_
.emplace(id, PendingRequest(std::move(report_request),
std::move(callback)))
.first->second;
// `fetcher_` is owned by `this`, so `base::Unretained()` is safe.
fetcher_->GetPublicKey(
pending_request.report_request.processing_url(),
base::BindOnce(&AggregatableReportAssembler::OnPublicKeyFetched,
base::Unretained(this), /*report_id=*/id));
}
void AggregatableReportAssembler::OnPublicKeyFetched(
int64_t report_id,
std::optional<PublicKey> key,
AggregationServiceKeyFetcher::PublicKeyFetchStatus status) {
CHECK_EQ(key.has_value(),
status == AggregationServiceKeyFetcher::PublicKeyFetchStatus::kOk);
auto pending_request_it = pending_requests_.find(report_id);
CHECK(pending_request_it != pending_requests_.end());
PendingRequest& pending_request = pending_request_it->second;
// TODO(crbug.com/40199738): Consider implementing some retry logic.
if (!key.has_value()) {
RecordAssemblyStatus(AssemblyStatus::kPublicKeyFetchFailed);
std::move(pending_request.callback)
.Run(std::move(pending_request.report_request), std::nullopt,
AssemblyStatus::kPublicKeyFetchFailed);
pending_requests_.erase(report_id);
return;
}
std::optional<AggregatableReport> assembled_report =
report_provider_->CreateFromRequestAndPublicKey(
pending_request.report_request, *std::move(key));
AssemblyStatus assembly_status =
assembled_report ? AssemblyStatus::kOk : AssemblyStatus::kAssemblyFailed;
RecordAssemblyStatus(assembly_status);
std::move(pending_request.callback)
.Run(std::move(pending_request.report_request),
std::move(assembled_report), assembly_status);
pending_requests_.erase(report_id);
}
} // namespace content
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