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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_PREFETCH_PAGE_LOAD_METRICS_OBSERVER_H_
#define CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_PREFETCH_PAGE_LOAD_METRICS_OBSERVER_H_
#include <optional>
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/task/cancelable_task_tracker.h"
#include "base/time/time.h"
#include "components/history/core/browser/history_types.h"
#include "components/page_load_metrics/browser/page_load_metrics_observer.h"
#include "content/public/browser/prefetch_metrics.h"
#include "net/cookies/canonical_cookie.h"
#include "url/gurl.h"
namespace content {
class NavigationHandle;
} // namespace content
// Records metrics related to loading of speculation rules prefetch. See
// //content/browser/preloading/prefetch/
class PrefetchPageLoadMetricsObserver
: public page_load_metrics::PageLoadMetricsObserver {
public:
PrefetchPageLoadMetricsObserver();
PrefetchPageLoadMetricsObserver(const PrefetchPageLoadMetricsObserver&) =
delete;
PrefetchPageLoadMetricsObserver& operator=(
const PrefetchPageLoadMetricsObserver&) = delete;
~PrefetchPageLoadMetricsObserver() override;
protected:
// Used as a callback for history service query results. Protected for
// testing.
void OnOriginLastVisitResult(base::Time query_start_time,
history::HistoryLastVisitResult result);
private:
void RecordMetrics();
// Records the corresponding UKM events.
void RecordPrefetchProxyEvent();
void RecordAfterPrefetchReferralEvent();
// page_load_metrics::PageLoadMetricsObserver:
ObservePolicy OnStart(content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url,
bool started_in_foreground) override;
ObservePolicy OnFencedFramesStart(
content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) override;
ObservePolicy OnPrerenderStart(content::NavigationHandle* navigation_handle,
const GURL& currently_committed_url) override;
ObservePolicy OnRedirect(
content::NavigationHandle* navigation_handle) override;
ObservePolicy OnCommit(content::NavigationHandle* navigation_handle) override;
void OnDidInternalNavigationAbort(
content::NavigationHandle* navigation_handle) override;
ObservePolicy FlushMetricsOnAppEnterBackground(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
ObservePolicy OnHidden(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnComplete(
const page_load_metrics::mojom::PageLoadTiming& timing) override;
void OnPrefetchLikely() override;
// The time that the navigation started. Used to timebox the history service
// query on commit.
base::Time navigation_start_;
// The minimum number of days since the last visit, as reported by
// HistoryService, to any origin in the redirect chain. Set to -1 if there is
// a response from the history service but was no previous visit.
std::optional<int> min_days_since_last_visit_to_origin_;
// Metrics related to prefetches requested by a page via the Speculation Rules
// API.
std::optional<content::PrefetchReferringPageMetrics> referring_page_metrics_;
// Metrics for page loads where prefetches were requested via the Speculation
// Rules API by the previous page load.
std::optional<content::PrefetchServingPageMetrics> serving_page_metrics_;
// Task tracker for calls for the history service.
base::CancelableTaskTracker task_tracker_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<PrefetchPageLoadMetricsObserver> weak_factory_{this};
};
#endif // CHROME_BROWSER_PAGE_LOAD_METRICS_OBSERVERS_PREFETCH_PAGE_LOAD_METRICS_OBSERVER_H_
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