WebResourceLoadStatisticsTelemetry.cpp   [plain text]

/*
 * Copyright (C) 2017-2019 Apple Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions
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#include "config.h"
#include "WebResourceLoadStatisticsTelemetry.h"

#if ENABLE(RESOURCE_LOAD_STATISTICS)

#include "ResourceLoadStatisticsDatabaseStore.h"
#include "ResourceLoadStatisticsMemoryStore.h"
#include "WebPageProxy.h"
#include "WebProcessPool.h"
#include "WebProcessProxy.h"
#include <WebCore/DiagnosticLoggingKeys.h>
#include <WebCore/ResourceLoadStatistics.h>
#include <wtf/MainThread.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/RunLoop.h>
#include <wtf/text/StringConcatenateNumbers.h>

namespace WebKit {
using namespace WebCore;

const unsigned minimumPrevalentResourcesForTelemetry = 3;
const unsigned significantFiguresForLoggedValues = 3;

struct PrevalentResourceTelemetry {
    unsigned numberOfTimesDataRecordsRemoved;
    bool hasHadUserInteraction;
    unsigned daysSinceUserInteraction;
    unsigned subframeUnderTopFrameOrigins;
    unsigned subresourceUnderTopFrameOrigins;
    unsigned subresourceUniqueRedirectsTo;
    unsigned timesAccessedAsFirstPartyDueToUserInteraction;
    unsigned timesAccessedAsFirstPartyDueToStorageAccessAPI;
};

static Vector<PrevalentResourceTelemetry> sortedPrevalentResourceTelemetry(const ResourceLoadStatisticsMemoryStore& store)
{
    ASSERT(!RunLoop::isMain());
    Vector<PrevalentResourceTelemetry> sorted;
    store.processStatistics([&sorted] (auto& statistic) {
        if (!statistic.isPrevalentResource)
            return;

        unsigned daysSinceUserInteraction = statistic.mostRecentUserInteractionTime <= WallTime() ? 0 : std::floor((WallTime::now() - statistic.mostRecentUserInteractionTime) / 24_h);
        sorted.append(PrevalentResourceTelemetry {
            statistic.dataRecordsRemoved,
            statistic.hadUserInteraction,
            daysSinceUserInteraction,
            statistic.subframeUnderTopFrameDomains.size(),
            statistic.subresourceUnderTopFrameDomains.size(),
            statistic.subresourceUniqueRedirectsTo.size(),
            statistic.timesAccessedAsFirstPartyDueToUserInteraction,
            statistic.timesAccessedAsFirstPartyDueToStorageAccessAPI
        });
    });

    if (sorted.size() < minimumPrevalentResourcesForTelemetry)
        return { };

    std::sort(sorted.begin(), sorted.end(), [](const PrevalentResourceTelemetry& a, const PrevalentResourceTelemetry& b) {
        return a.subframeUnderTopFrameOrigins + a.subresourceUnderTopFrameOrigins + a.subresourceUniqueRedirectsTo >
        b.subframeUnderTopFrameOrigins + b.subresourceUnderTopFrameOrigins + b.subresourceUniqueRedirectsTo;
    });

    return sorted;
}

static unsigned numberOfResourcesWithUserInteraction(const Vector<PrevalentResourceTelemetry>& resources, size_t begin, size_t end)
{
    if (resources.isEmpty() || resources.size() < begin + 1 || resources.size() < end + 1)
        return 0;
    
    unsigned result = 0;
    for (size_t i = begin; i < end; ++i) {
        if (resources[i].hasHadUserInteraction)
            ++result;
    }
    
    return result;
}
    
static unsigned median(const Vector<unsigned>& v)
{
    if (v.isEmpty())
        return 0;
    if (v.size() == 1)
        return v[0];
    
    auto size = v.size();
    auto middle = size / 2;
    if (size % 2)
        return v[middle];
    return (v[middle - 1] + v[middle]) / 2;
}
    
static unsigned median(const Vector<PrevalentResourceTelemetry>& v, unsigned begin, unsigned end, const WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)>& statisticGetter)
{
    if (v.isEmpty() || v.size() < begin + 1 || v.size() < end + 1)
        return 0;
    
    Vector<unsigned> part;
    part.reserveInitialCapacity(end - begin + 1);
    for (unsigned i = begin; i <= end; ++i)
        part.uncheckedAppend(statisticGetter(v[i]));
    
    return median(part);
}
    
static void submitTopList(unsigned numberOfResourcesFromTheTop, const Vector<PrevalentResourceTelemetry>& sortedPrevalentResources, const Vector<PrevalentResourceTelemetry>& sortedPrevalentResourcesWithoutUserInteraction, const WebResourceLoadStatisticsStore& store)
{
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> subframeUnderTopFrameOriginsGetter = [] (auto& t) {
        return t.subframeUnderTopFrameOrigins;
    };
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> subresourceUnderTopFrameOriginsGetter = [] (auto& t) {
        return t.subresourceUnderTopFrameOrigins;
    };
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> subresourceUniqueRedirectsToGetter = [] (auto& t) {
        return t.subresourceUniqueRedirectsTo;
    };
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> numberOfTimesDataRecordsRemovedGetter = [] (auto& t) {
        return t.numberOfTimesDataRecordsRemoved;
    };
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> numberOfTimesAccessedAsFirstPartyDueToUserInteractionGetter = [] (auto& t) {
        return t.timesAccessedAsFirstPartyDueToUserInteraction;
    };
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> numberOfTimesAccessedAsFirstPartyDueToStorageAccessAPIGetter = [] (auto& t) {
        return t.timesAccessedAsFirstPartyDueToStorageAccessAPI;
    };

    unsigned topPrevalentResourcesWithUserInteraction = numberOfResourcesWithUserInteraction(sortedPrevalentResources, 0, numberOfResourcesFromTheTop - 1);
    unsigned topSubframeUnderTopFrameOrigins = median(sortedPrevalentResourcesWithoutUserInteraction, 0, numberOfResourcesFromTheTop - 1, subframeUnderTopFrameOriginsGetter);
    unsigned topSubresourceUnderTopFrameOrigins = median(sortedPrevalentResourcesWithoutUserInteraction, 0, numberOfResourcesFromTheTop - 1, subresourceUnderTopFrameOriginsGetter);
    unsigned topSubresourceUniqueRedirectsTo = median(sortedPrevalentResourcesWithoutUserInteraction, 0, numberOfResourcesFromTheTop - 1, subresourceUniqueRedirectsToGetter);
    unsigned topNumberOfTimesDataRecordsRemoved = median(sortedPrevalentResourcesWithoutUserInteraction, 0, numberOfResourcesFromTheTop - 1, numberOfTimesDataRecordsRemovedGetter);
    unsigned topNumberOfTimesAccessedAsFirstPartyDueToUserInteraction = median(sortedPrevalentResourcesWithoutUserInteraction, 0, numberOfResourcesFromTheTop - 1, numberOfTimesAccessedAsFirstPartyDueToUserInteractionGetter);
    unsigned topNumberOfTimesAccessedAsFirstPartyDueToStorageAccessAPI = median(sortedPrevalentResourcesWithoutUserInteraction, 0, numberOfResourcesFromTheTop - 1, numberOfTimesAccessedAsFirstPartyDueToStorageAccessAPIGetter);

    String descriptionPreamble = makeString("top", numberOfResourcesFromTheTop);

    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "PrevalentResourcesWithUserInteraction",
        topPrevalentResourcesWithUserInteraction, significantFiguresForLoggedValues, ShouldSample::No);
    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "SubframeUnderTopFrameOrigins",
        topSubframeUnderTopFrameOrigins, significantFiguresForLoggedValues, ShouldSample::No);
    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "SubresourceUnderTopFrameOrigins",
        topSubresourceUnderTopFrameOrigins, significantFiguresForLoggedValues, ShouldSample::No);
    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "SubresourceUniqueRedirectsTo",
        topSubresourceUniqueRedirectsTo, significantFiguresForLoggedValues, ShouldSample::No);
    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "NumberOfTimesDataRecordsRemoved",
        topNumberOfTimesDataRecordsRemoved, significantFiguresForLoggedValues, ShouldSample::No);
    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "NumberOfTimesAccessedAsFirstPartyDueToUserInteraction",
        topNumberOfTimesAccessedAsFirstPartyDueToUserInteraction, significantFiguresForLoggedValues, ShouldSample::No);
    store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + "NumberOfTimesAccessedAsFirstPartyDueToStorageAccessAPI",
        topNumberOfTimesAccessedAsFirstPartyDueToStorageAccessAPI, significantFiguresForLoggedValues, ShouldSample::No);
}
    
static void submitTopLists(const Vector<PrevalentResourceTelemetry>& sortedPrevalentResources, const Vector<PrevalentResourceTelemetry>& sortedPrevalentResourcesWithoutUserInteraction, const WebResourceLoadStatisticsStore& store)
{
    submitTopList(1, sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, store);
    
    if (sortedPrevalentResourcesWithoutUserInteraction.size() < 3)
        return;
    submitTopList(3, sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, store);
    
    if (sortedPrevalentResourcesWithoutUserInteraction.size() < 10)
        return;
    submitTopList(10, sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, store);
    
    if (sortedPrevalentResourcesWithoutUserInteraction.size() < 50)
        return;
    submitTopList(50, sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, store);
    
    if (sortedPrevalentResourcesWithoutUserInteraction.size() < 100)
        return;
    submitTopList(100, sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, store);
}
    
// This function is for testing purposes.
void static notifyPages(unsigned numberOfPrevalentResources, unsigned numberOfPrevalentResourcesWithUserInteraction, unsigned numberOfPrevalentResourcesWithoutUserInteraction, unsigned topPrevalentResourceWithUserInteractionDaysSinceUserInteraction, unsigned medianDaysSinceUserInteractionPrevalentResourceWithUserInteraction, unsigned top3NumberOfPrevalentResourcesWithUI, unsigned top3MedianSubFrameWithoutUI, unsigned top3MedianSubResourceWithoutUI, unsigned top3MedianUniqueRedirectsWithoutUI, unsigned top3MedianDataRecordsRemovedWithoutUI, const WebResourceLoadStatisticsStore& store)
{
    RunLoop::main().dispatch([numberOfPrevalentResources, numberOfPrevalentResourcesWithUserInteraction, numberOfPrevalentResourcesWithoutUserInteraction, topPrevalentResourceWithUserInteractionDaysSinceUserInteraction, medianDaysSinceUserInteractionPrevalentResourceWithUserInteraction, top3NumberOfPrevalentResourcesWithUI, top3MedianSubFrameWithoutUI, top3MedianSubResourceWithoutUI, top3MedianUniqueRedirectsWithoutUI, top3MedianDataRecordsRemovedWithoutUI, store = makeRef(store)] {
        store->notifyPageStatisticsTelemetryFinished(numberOfPrevalentResources, numberOfPrevalentResourcesWithUserInteraction, numberOfPrevalentResourcesWithoutUserInteraction, topPrevalentResourceWithUserInteractionDaysSinceUserInteraction, medianDaysSinceUserInteractionPrevalentResourceWithUserInteraction, top3NumberOfPrevalentResourcesWithUI, top3MedianSubFrameWithoutUI, top3MedianSubResourceWithoutUI, top3MedianUniqueRedirectsWithoutUI, top3MedianDataRecordsRemovedWithoutUI);
    });
}
    
// This function is for testing purposes.
void static notifyPages(const Vector<PrevalentResourceTelemetry>& sortedPrevalentResources, const Vector<PrevalentResourceTelemetry>& sortedPrevalentResourcesWithoutUserInteraction, unsigned totalNumberOfPrevalentResourcesWithUserInteraction, const WebResourceLoadStatisticsStore& store)
{
    WTF::Function<unsigned(const PrevalentResourceTelemetry& telemetry)> subframeUnderTopFrameOriginsGetter = [] (const PrevalentResourceTelemetry& t) {
        return t.subframeUnderTopFrameOrigins;
    };
    notifyPages(sortedPrevalentResources.size(), totalNumberOfPrevalentResourcesWithUserInteraction, 0, 0, 0, 0, median(sortedPrevalentResourcesWithoutUserInteraction, 0, 2, subframeUnderTopFrameOriginsGetter), 0, 0, 0,  store);
}
    
void WebResourceLoadStatisticsTelemetry::calculateAndSubmit(const ResourceLoadStatisticsMemoryStore& resourceLoadStatisticsStore, NotifyPagesForTesting notifyPagesWhenTelemetryWasCaptured)
{
    ASSERT(!RunLoop::isMain());
    
    auto sortedPrevalentResources = sortedPrevalentResourceTelemetry(resourceLoadStatisticsStore);
    if (notifyPagesWhenTelemetryWasCaptured == NotifyPagesForTesting::Yes && sortedPrevalentResources.isEmpty()) {
        notifyPages(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, resourceLoadStatisticsStore.store());
        return;
    }
    
    Vector<PrevalentResourceTelemetry> sortedPrevalentResourcesWithoutUserInteraction;
    sortedPrevalentResourcesWithoutUserInteraction.reserveInitialCapacity(sortedPrevalentResources.size());
    Vector<unsigned> prevalentResourcesDaysSinceUserInteraction;
    
    for (auto& prevalentResource : sortedPrevalentResources) {
        if (prevalentResource.hasHadUserInteraction)
            prevalentResourcesDaysSinceUserInteraction.append(prevalentResource.daysSinceUserInteraction);
        else
            sortedPrevalentResourcesWithoutUserInteraction.uncheckedAppend(prevalentResource);
    }
    
    // Dispatch on the main thread to make sure the WebPageProxy we're using doesn't go away.
    RunLoop::main().dispatch([notifyPagesWhenTelemetryWasCaptured, sortedPrevalentResources = WTFMove(sortedPrevalentResources), sortedPrevalentResourcesWithoutUserInteraction = WTFMove(sortedPrevalentResourcesWithoutUserInteraction), prevalentResourcesDaysSinceUserInteraction = WTFMove(prevalentResourcesDaysSinceUserInteraction), store = makeRef(resourceLoadStatisticsStore.store())] () {
        auto webPageProxy = WebPageProxy::nonEphemeralWebPageProxy();
        if (!webPageProxy) {
            if (notifyPagesWhenTelemetryWasCaptured == NotifyPagesForTesting::Yes)
                notifyPages(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, store);
            return;
        }
        
        if (notifyPagesWhenTelemetryWasCaptured == NotifyPagesForTesting::Yes) {
            notifyPages(sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, prevalentResourcesDaysSinceUserInteraction.size(), store);
            // The notify pages function is for testing so we don't need to do an actual submission.
            return;
        }
        
        webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "totalNumberOfPrevalentResources"_s, sortedPrevalentResources.size(), significantFiguresForLoggedValues, ShouldSample::No);
        webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "totalNumberOfPrevalentResourcesWithUserInteraction"_s, prevalentResourcesDaysSinceUserInteraction.size(), significantFiguresForLoggedValues, ShouldSample::No);
        
        if (prevalentResourcesDaysSinceUserInteraction.size() > 0)
            webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "topPrevalentResourceWithUserInteractionDaysSinceUserInteraction"_s, prevalentResourcesDaysSinceUserInteraction[0], significantFiguresForLoggedValues, ShouldSample::No);
        if (prevalentResourcesDaysSinceUserInteraction.size() > 1)
            webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "medianPrevalentResourcesWithUserInteractionDaysSinceUserInteraction"_s, median(prevalentResourcesDaysSinceUserInteraction), significantFiguresForLoggedValues, ShouldSample::No);
        
        submitTopLists(sortedPrevalentResources, sortedPrevalentResourcesWithoutUserInteraction, store);
    });
}

static StringView makeDescription(PrevalentResourceDatabaseTelemetry::Statistic statistic)
{
    switch (statistic) {
    case PrevalentResourceDatabaseTelemetry::Statistic::NumberOfPrevalentResourcesWithUI:
        return "PrevalentResourcesWithUserInteraction";
    case PrevalentResourceDatabaseTelemetry::Statistic::MedianSubFrameWithoutUI:
        return "SubframeUnderTopFrameOrigins";
    case PrevalentResourceDatabaseTelemetry::Statistic::MedianSubResourceWithoutUI:
        return "SubresourceUnderTopFrameOrigins";
    case PrevalentResourceDatabaseTelemetry::Statistic::MedianUniqueRedirectsWithoutUI:
        return "SubresourceUniqueRedirectsTo";
    case PrevalentResourceDatabaseTelemetry::Statistic::MedianDataRecordsRemovedWithoutUI:
        return "NumberOfTimesDataRecordsRemoved";
    case PrevalentResourceDatabaseTelemetry::Statistic::MedianTimesAccessedDueToUserInteractionWithoutUI:
        return "NumberOfTimesAccessedAsFirstPartyDueToUserInteraction";
    case PrevalentResourceDatabaseTelemetry::Statistic::MedianTimesAccessedDueToStorageAccessAPIWithoutUI:
        return "NumberOfTimesAccessedAsFirstPartyDueToStorageAccessAPI";
    }
    ASSERT_NOT_REACHED();
    return { };
}

static void databaseSubmitTopLists(const PrevalentResourceDatabaseTelemetry& telemetry, const WebResourceLoadStatisticsStore& store)
{
    for (unsigned bucketIndex = 0; bucketIndex < bucketSizes.size(); bucketIndex++) {

        if (telemetry.numberOfPrevalentResourcesWithoutUserInteraction < bucketSizes[bucketIndex])
            return;

        String descriptionPreamble = makeString("top", bucketSizes[bucketIndex]);

        for (unsigned statisticIndex = 0; statisticIndex < numberOfStatistics; statisticIndex++) {
            auto statistic = static_cast<PrevalentResourceDatabaseTelemetry::Statistic>(statisticIndex);

            store.sendDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), descriptionPreamble + makeDescription(statistic), telemetry.statistics[statisticIndex][bucketIndex], significantFiguresForLoggedValues, ShouldSample::No);
        }
    }
}

void WebResourceLoadStatisticsTelemetry::submitTelemetry(const ResourceLoadStatisticsDatabaseStore& resourceLoadStatisticsStore, PrevalentResourceDatabaseTelemetry& prevalentResourceDatabaseTelemetry, NotifyPagesForTesting notifyPagesWhenTelemetryWasCaptured)
{
    ASSERT(!RunLoop::isMain());

    if (notifyPagesWhenTelemetryWasCaptured == NotifyPagesForTesting::Yes && !prevalentResourceDatabaseTelemetry.numberOfPrevalentResources) {
        notifyPages(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, resourceLoadStatisticsStore.store());
        return;
    }

    // Dispatch on the main thread to make sure the WebPageProxy we're using doesn't go away.
    RunLoop::main().dispatch([notifyPagesWhenTelemetryWasCaptured, telemetry = WTFMove(prevalentResourceDatabaseTelemetry), store = makeRef(resourceLoadStatisticsStore.store())] () {

        // The notify pages function is for testing so we don't need to do an actual submission.
        if (notifyPagesWhenTelemetryWasCaptured == NotifyPagesForTesting::Yes) {
            if (telemetry.numberOfPrevalentResourcesWithoutUserInteraction < 3) {
                notifyPages(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, store);
                return;
            }
            notifyPages(telemetry.numberOfPrevalentResources,
                telemetry.numberOfPrevalentResourcesWithUserInteraction,
                telemetry.numberOfPrevalentResourcesWithoutUserInteraction,
                telemetry.topPrevalentResourceWithUserInteractionDaysSinceUserInteraction,
                telemetry.medianDaysSinceUserInteractionPrevalentResourceWithUserInteraction,
                telemetry.statistics[0][1], // bucket 1 -> top3.
                telemetry.statistics[1][1],
                telemetry.statistics[2][1],
                telemetry.statistics[3][1],
                telemetry.statistics[4][1],
                store);
            return;
        }
        
        auto webPageProxy = WebPageProxy::nonEphemeralWebPageProxy();
        if (!webPageProxy)
            return;

        webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "totalNumberOfPrevalentResources"_s, telemetry.numberOfPrevalentResources, significantFiguresForLoggedValues, ShouldSample::No);
        webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "totalNumberOfPrevalentResourcesWithUserInteraction"_s, telemetry.numberOfPrevalentResourcesWithUserInteraction, significantFiguresForLoggedValues, ShouldSample::No);
        if (telemetry.numberOfPrevalentResourcesWithUserInteraction > 0)
            webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "topPrevalentResourceWithUserInteractionDaysSinceUserInteraction"_s, telemetry.topPrevalentResourceWithUserInteractionDaysSinceUserInteraction, significantFiguresForLoggedValues, ShouldSample::No);
        if (telemetry.numberOfPrevalentResourcesWithUserInteraction > 1)
            webPageProxy->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::resourceLoadStatisticsTelemetryKey(), "medianPrevalentResourcesWithUserInteractionDaysSinceUserInteraction"_s, telemetry.medianDaysSinceUserInteractionPrevalentResourceWithUserInteraction, significantFiguresForLoggedValues, ShouldSample::No);

        databaseSubmitTopLists(telemetry, store);
    });
}
}

#endif