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