gecko-dev/dom/performance/PerformanceTiming.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_PerformanceTiming_h
#define mozilla_dom_PerformanceTiming_h
#include "mozilla/Attributes.h"
#include "nsContentUtils.h"
#include "nsDOMNavigationTiming.h"
#include "nsRFPService.h"
#include "nsWrapperCache.h"
#include "Performance.h"
#include "nsITimedChannel.h"
class nsIHttpChannel;
namespace mozilla {
namespace dom {
class PerformanceTiming;
class PerformanceTimingData final
{
friend class PerformanceTiming;
public:
// This can return null.
static PerformanceTimingData*
Create(nsITimedChannel* aChannel,
nsIHttpChannel* aHttpChannel,
DOMHighResTimeStamp aZeroTime,
nsAString& aInitiatorType,
nsAString& aEntryName);
PerformanceTimingData(nsITimedChannel* aChannel,
nsIHttpChannel* aHttpChannel,
DOMHighResTimeStamp aZeroTime);
void
SetPropertiesFromHttpChannel(nsIHttpChannel* aHttpChannel,
nsITimedChannel* aChannel);
bool IsInitialized() const
{
return mInitialized;
}
const nsString& NextHopProtocol() const
{
return mNextHopProtocol;
}
uint64_t TransferSize() const
{
return mTransferSize;
}
uint64_t EncodedBodySize() const
{
return mEncodedBodySize;
}
uint64_t DecodedBodySize() const
{
return mDecodedBodySize;
}
/**
* @param aStamp
* The TimeStamp recorded for a specific event. This TimeStamp can
* be null.
* @return the duration of an event with a given TimeStamp, relative to the
* navigationStart TimeStamp (the moment the user landed on the
* page), if the given TimeStamp is valid. Otherwise, it will return
* the FetchStart timing value.
*/
inline DOMHighResTimeStamp
TimeStampToReducedDOMHighResOrFetchStart(Performance* aPerformance,
TimeStamp aStamp)
{
MOZ_ASSERT(aPerformance);
if(aStamp.IsNull()) {
return FetchStartHighRes(aPerformance);
}
DOMHighResTimeStamp rawTimestamp = TimeStampToDOMHighRes(aPerformance, aStamp);
if (aPerformance->IsSystemPrincipal()) {
return rawTimestamp;
}
return nsRFPService::ReduceTimePrecisionAsMSecs(rawTimestamp,
aPerformance->GetRandomTimelineSeed());
}
/**
* The nsITimedChannel records an absolute timestamp for each event.
* The nsDOMNavigationTiming will record the moment when the user landed on
* the page. This is a window.performance unique timestamp, so it can be used
* for all the events (navigation timing and resource timing events).
*
* The algorithm operates in 2 steps:
* 1. The first step is to subtract the two timestamps: the argument (the
* event's timestamp) and the navigation start timestamp. This will result in
* a relative timestamp of the event (relative to the navigation start -
* window.performance.timing.navigationStart).
* 2. The second step is to add any required offset (the mZeroTime). For now,
* this offset value is either 0 (for the resource timing), or equal to
* "performance.navigationStart" (for navigation timing).
* For the resource timing, mZeroTime is set to 0, causing the result to be a
* relative time.
* For the navigation timing, mZeroTime is set to "performance.navigationStart"
* causing the result be an absolute time.
*
* @param aStamp
* The TimeStamp recorded for a specific event. This TimeStamp can't
* be null.
* @return number of milliseconds value as one of:
* - relative to the navigation start time, time the user has landed on the
* page
* - an absolute wall clock time since the unix epoch
*/
inline DOMHighResTimeStamp
TimeStampToDOMHighRes(Performance* aPerformance, TimeStamp aStamp) const
{
MOZ_ASSERT(aPerformance);
MOZ_ASSERT(!aStamp.IsNull());
TimeDuration duration = aStamp - aPerformance->CreationTimeStamp();
return duration.ToMilliseconds() + mZeroTime;
}
// The last channel's AsyncOpen time. This may occur before the FetchStart
// in some cases.
DOMHighResTimeStamp AsyncOpenHighRes(Performance* aPerformance);
// High resolution (used by resource timing)
DOMHighResTimeStamp WorkerStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp FetchStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp RedirectStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp RedirectEndHighRes(Performance* aPerformance);
DOMHighResTimeStamp DomainLookupStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp DomainLookupEndHighRes(Performance* aPerformance);
DOMHighResTimeStamp ConnectStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp SecureConnectionStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp ConnectEndHighRes(Performance* aPerformance);
DOMHighResTimeStamp RequestStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp ResponseStartHighRes(Performance* aPerformance);
DOMHighResTimeStamp ResponseEndHighRes(Performance* aPerformance);
DOMHighResTimeStamp ZeroTime() const { return mZeroTime; }
uint8_t RedirectCountReal() const { return mRedirectCount; }
uint8_t GetRedirectCount() const;
bool AllRedirectsSameOrigin() const { return mAllRedirectsSameOrigin; }
// If this is false the values of redirectStart/End will be 0 This is false if
// no redirects occured, or if any of the responses failed the
// timing-allow-origin check in HttpBaseChannel::TimingAllowCheck
bool ShouldReportCrossOriginRedirect() const;
// Cached result of CheckAllowedOrigin. If false, security sensitive
// attributes of the resourceTiming object will be set to 0
bool TimingAllowed() const
{
return mTimingAllowed;
}
nsTArray<nsCOMPtr<nsIServerTiming>> GetServerTiming();
private:
// Checks if the resource is either same origin as the page that started
// the load, or if the response contains the Timing-Allow-Origin header
// with a value of * or matching the domain of the loading Principal
bool CheckAllowedOrigin(nsIHttpChannel* aResourceChannel,
nsITimedChannel* aChannel);
nsTArray<nsCOMPtr<nsIServerTiming>> mServerTiming;
nsString mNextHopProtocol;
TimeStamp mAsyncOpen;
TimeStamp mRedirectStart;
TimeStamp mRedirectEnd;
TimeStamp mDomainLookupStart;
TimeStamp mDomainLookupEnd;
TimeStamp mConnectStart;
TimeStamp mSecureConnectionStart;
TimeStamp mConnectEnd;
TimeStamp mRequestStart;
TimeStamp mResponseStart;
TimeStamp mCacheReadStart;
TimeStamp mResponseEnd;
TimeStamp mCacheReadEnd;
// ServiceWorker interception timing information
TimeStamp mWorkerStart;
TimeStamp mWorkerRequestStart;
TimeStamp mWorkerResponseEnd;
// This is an offset that will be added to each timing ([ms] resolution).
// There are only 2 possible values: (1) logicaly equal to navigationStart
// TimeStamp (results are absolute timstamps - wallclock); (2) "0" (results
// are relative to the navigation start).
DOMHighResTimeStamp mZeroTime;
DOMHighResTimeStamp mFetchStart;
uint64_t mEncodedBodySize;
uint64_t mTransferSize;
uint64_t mDecodedBodySize;
uint8_t mRedirectCount;
bool mAllRedirectsSameOrigin;
// If the resourceTiming object should have non-zero redirectStart and
// redirectEnd attributes. It is false if there were no redirects, or if any
// of the responses didn't pass the timing-allow-check
bool mReportCrossOriginRedirect;
bool mSecureConnection;
bool mTimingAllowed;
bool mInitialized;
};
// Script "performance.timing" object
class PerformanceTiming final : public nsWrapperCache
{
public:
/**
* @param aPerformance
* The performance object (the JS parent).
* This will allow access to "window.performance.timing" attribute for
* the navigation timing (can't be null).
* @param aChannel
* An nsITimedChannel used to gather all the networking timings by both
* the navigation timing and the resource timing (can't be null).
* @param aHttpChannel
* An nsIHttpChannel (the resource's http channel).
* This will be used by the resource timing cross-domain check
* algorithm.
* Argument is null for the navigation timing (navigation timing uses
* another algorithm for the cross-domain redirects).
* @param aZeroTime
* The offset that will be added to the timestamp of each event. This
* argument should be equal to performance.navigationStart for
* navigation timing and "0" for the resource timing.
*/
PerformanceTiming(Performance* aPerformance,
nsITimedChannel* aChannel,
nsIHttpChannel* aHttpChannel,
DOMHighResTimeStamp aZeroTime);
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(PerformanceTiming)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(PerformanceTiming)
nsDOMNavigationTiming* GetDOMTiming() const
{
return mPerformance->GetDOMTiming();
}
Performance* GetParentObject() const
{
return mPerformance;
}
virtual JSObject* WrapObject(JSContext *cx,
JS::Handle<JSObject*> aGivenProto) override;
// PerformanceNavigation WebIDL methods
DOMTimeMilliSec NavigationStart() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetNavigationStart();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetNavigationStart(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec UnloadEventStart()
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetUnloadEventStart();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetUnloadEventStart(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec UnloadEventEnd()
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetUnloadEventEnd();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetUnloadEventEnd(),
mPerformance->GetRandomTimelineSeed());
}
// Low resolution (used by navigation timing)
DOMTimeMilliSec FetchStart();
DOMTimeMilliSec RedirectStart();
DOMTimeMilliSec RedirectEnd();
DOMTimeMilliSec DomainLookupStart();
DOMTimeMilliSec DomainLookupEnd();
DOMTimeMilliSec ConnectStart();
DOMTimeMilliSec SecureConnectionStart();
DOMTimeMilliSec ConnectEnd();
DOMTimeMilliSec RequestStart();
DOMTimeMilliSec ResponseStart();
DOMTimeMilliSec ResponseEnd();
DOMTimeMilliSec DomLoading()
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetDomLoading();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetDomLoading(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec DomInteractive() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetDomInteractive();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetDomInteractive(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec DomContentLoadedEventStart() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetDomContentLoadedEventStart();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetDomContentLoadedEventStart(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec DomContentLoadedEventEnd() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetDomContentLoadedEventEnd();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetDomContentLoadedEventEnd(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec DomComplete() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetDomComplete();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetDomComplete(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec LoadEventStart() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetLoadEventStart();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetLoadEventStart(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec LoadEventEnd() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetLoadEventEnd();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetLoadEventEnd(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec TimeToNonBlankPaint() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetTimeToNonBlankPaint();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetTimeToNonBlankPaint(),
mPerformance->GetRandomTimelineSeed());
}
DOMTimeMilliSec TimeToDOMContentFlushed() const
{
if (!nsContentUtils::IsPerformanceTimingEnabled() ||
nsContentUtils::ShouldResistFingerprinting()) {
return 0;
}
if (mPerformance->IsSystemPrincipal()) {
return GetDOMTiming()->GetTimeToDOMContentFlushed();
}
return nsRFPService::ReduceTimePrecisionAsMSecs(
GetDOMTiming()->GetTimeToDOMContentFlushed(),
mPerformance->GetRandomTimelineSeed());
}
PerformanceTimingData* Data() const
{
return mTimingData.get();
}
private:
~PerformanceTiming();
bool IsTopLevelContentDocument() const;
RefPtr<Performance> mPerformance;
UniquePtr<PerformanceTimingData> mTimingData;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_PerformanceTiming_h