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reporting_delivery_agent.cc
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reporting_delivery_agent.cc
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// Copyright 2017 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 "net/reporting/reporting_delivery_agent.h"
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/time/tick_clock.h"
#include "base/timer/timer.h"
#include "base/values.h"
#include "net/reporting/reporting_cache.h"
#include "net/reporting/reporting_delegate.h"
#include "net/reporting/reporting_endpoint_manager.h"
#include "net/reporting/reporting_observer.h"
#include "net/reporting/reporting_report.h"
#include "net/reporting/reporting_uploader.h"
#include "url/gurl.h"
#include "url/origin.h"
namespace net {
namespace {
void SerializeReports(const std::vector<const ReportingReport*>& reports,
base::TimeTicks now,
std::string* json_out) {
base::ListValue reports_value;
for (const ReportingReport* report : reports) {
std::unique_ptr<base::DictionaryValue> report_value =
std::make_unique<base::DictionaryValue>();
report_value->SetInteger("age", (now - report->queued).InMilliseconds());
report_value->SetString("type", report->type);
report_value->SetString("url", report->url.spec());
report_value->SetKey("report", report->body->Clone());
reports_value.Append(std::move(report_value));
}
bool json_written = base::JSONWriter::Write(reports_value, json_out);
DCHECK(json_written);
}
class ReportingDeliveryAgentImpl : public ReportingDeliveryAgent,
public ReportingObserver {
public:
ReportingDeliveryAgentImpl(ReportingContext* context)
: context_(context),
timer_(std::make_unique<base::OneShotTimer>()),
weak_factory_(this) {
context_->AddObserver(this);
}
// ReportingDeliveryAgent implementation:
~ReportingDeliveryAgentImpl() override { context_->RemoveObserver(this); }
void SetTimerForTesting(std::unique_ptr<base::Timer> timer) override {
DCHECK(!timer_->IsRunning());
timer_ = std::move(timer);
}
// ReportingObserver implementation:
void OnCacheUpdated() override {
if (CacheHasReports())
StartTimer();
}
private:
class Delivery {
public:
Delivery(const GURL& endpoint,
const std::vector<const ReportingReport*>& reports)
: endpoint(endpoint), reports(reports) {}
~Delivery() {}
const GURL endpoint;
const std::vector<const ReportingReport*> reports;
};
using OriginGroup = std::pair<url::Origin, std::string>;
bool CacheHasReports() {
std::vector<const ReportingReport*> reports;
context_->cache()->GetReports(&reports);
return !reports.empty();
}
void StartTimer() {
timer_->Start(FROM_HERE, policy().delivery_interval,
base::Bind(&ReportingDeliveryAgentImpl::OnTimerFired,
base::Unretained(this)));
}
void OnTimerFired() {
if (CacheHasReports()) {
SendReports();
StartTimer();
}
}
void SendReports() {
std::vector<const ReportingReport*> reports;
cache()->GetReports(&reports);
// Sort reports into (origin, group) buckets.
std::map<OriginGroup, std::vector<const ReportingReport*>>
origin_group_reports;
for (const ReportingReport* report : reports) {
url::Origin origin = url::Origin::Create(report->url);
if (!delegate()->CanSendReport(origin))
continue;
OriginGroup origin_group(url::Origin::Create(report->url), report->group);
origin_group_reports[origin_group].push_back(report);
}
// Find endpoint for each (origin, group) bucket and sort reports into
// endpoint buckets. Don't allow concurrent deliveries to the same (origin,
// group) bucket.
std::map<GURL, std::vector<const ReportingReport*>> endpoint_reports;
for (auto& it : origin_group_reports) {
const OriginGroup& origin_group = it.first;
if (base::ContainsKey(pending_origin_groups_, origin_group))
continue;
GURL endpoint_url;
if (!endpoint_manager()->FindEndpointForOriginAndGroup(
origin_group.first, origin_group.second, &endpoint_url)) {
continue;
}
cache()->MarkClientUsed(origin_group.first, endpoint_url);
endpoint_reports[endpoint_url].insert(
endpoint_reports[endpoint_url].end(), it.second.begin(),
it.second.end());
pending_origin_groups_.insert(origin_group);
}
// Start a delivery to each endpoint.
for (auto& it : endpoint_reports) {
const GURL& endpoint = it.first;
const std::vector<const ReportingReport*>& reports = it.second;
endpoint_manager()->SetEndpointPending(endpoint);
cache()->SetReportsPending(reports);
std::string json;
SerializeReports(reports, tick_clock()->NowTicks(), &json);
uploader()->StartUpload(
endpoint, json,
base::Bind(&ReportingDeliveryAgentImpl::OnUploadComplete,
weak_factory_.GetWeakPtr(),
std::make_unique<Delivery>(endpoint, reports)));
}
}
void OnUploadComplete(const std::unique_ptr<Delivery>& delivery,
ReportingUploader::Outcome outcome) {
if (outcome == ReportingUploader::Outcome::SUCCESS) {
cache()->RemoveReports(delivery->reports,
ReportingReport::Outcome::DELIVERED);
endpoint_manager()->InformOfEndpointRequest(delivery->endpoint, true);
} else {
cache()->IncrementReportsAttempts(delivery->reports);
endpoint_manager()->InformOfEndpointRequest(delivery->endpoint, false);
}
if (outcome == ReportingUploader::Outcome::REMOVE_ENDPOINT)
cache()->RemoveClientsForEndpoint(delivery->endpoint);
for (const ReportingReport* report : delivery->reports) {
pending_origin_groups_.erase(
OriginGroup(url::Origin::Create(report->url), report->group));
}
endpoint_manager()->ClearEndpointPending(delivery->endpoint);
cache()->ClearReportsPending(delivery->reports);
}
const ReportingPolicy& policy() { return context_->policy(); }
base::TickClock* tick_clock() { return context_->tick_clock(); }
ReportingDelegate* delegate() { return context_->delegate(); }
ReportingCache* cache() { return context_->cache(); }
ReportingUploader* uploader() { return context_->uploader(); }
ReportingEndpointManager* endpoint_manager() {
return context_->endpoint_manager();
}
ReportingContext* context_;
std::unique_ptr<base::Timer> timer_;
// Tracks OriginGroup tuples for which there is a pending delivery running.
// (Would be an unordered_set, but there's no hash on pair.)
std::set<OriginGroup> pending_origin_groups_;
base::WeakPtrFactory<ReportingDeliveryAgentImpl> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(ReportingDeliveryAgentImpl);
};
} // namespace
// static
std::unique_ptr<ReportingDeliveryAgent> ReportingDeliveryAgent::Create(
ReportingContext* context) {
return std::make_unique<ReportingDeliveryAgentImpl>(context);
}
ReportingDeliveryAgent::~ReportingDeliveryAgent() {}
} // namespace net