如何配置Application Insights记录图片等静态文件成功请求

• 目前Application Insights未记录任何静态文件的请求日志，需要开启该类日志的采集功能
• 应用内所有业务路由的请求均已被Application Insights正常采集记录
• 静态文件请求可在AppServiceLogs中正常查询到
• 在Live metrics的Incoming Requests视图中，可正常查看到App Server Http Host的活动日志

现需要修改Application Insights配置，实现对图片、ico、各类静态文件请求的日志采集，当前使用的配置文件内容如下：

<?xml version="1.0" encoding="utf-8"?>
<ApplicationInsights xmlns="http://schemas.microsoft.com/ApplicationInsights/2013/Settings">
  <TelemetrySinks>
    <Add Name="default">
      <TelemetryProcessors>
        <Add Type="Microsoft.ApplicationInsights.Extensibility.PerfCounterCollector.QuickPulse.QuickPulseTelemetryProcessor, Microsoft.AI.PerfCounterCollector" />
        <Add Type="Microsoft.ApplicationInsights.SnapshotCollector.SnapshotCollectorTelemetryProcessor, Microsoft.ApplicationInsights.SnapshotCollector">
          <IsEnabled>true</IsEnabled>
          <IsEnabledInDeveloperMode>false</IsEnabledInDeveloperMode>
          <ThresholdForSnapshotting>1</ThresholdForSnapshotting>
          <MaximumSnapshotsRequired>3</MaximumSnapshotsRequired>
          <MaximumCollectionPlanSize>50</MaximumCollectionPlanSize>
          <ProblemCounterResetInterval>24:00:00</ProblemCounterResetInterval>
          <SnapshotsPerDayLimit>30</SnapshotsPerDayLimit>
          <SnapshotInLowPriorityThread>true</SnapshotInLowPriorityThread>
        </Add>
        <Add Type="Microsoft.ApplicationInsights.Extensibility.AutocollectedMetricsExtractor, Microsoft.ApplicationInsights" />
        <Add Type="Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel.AdaptiveSamplingTelemetryProcessor, Microsoft.AI.ServerTelemetryChannel">
          <MaxTelemetryItemsPerSecond>5</MaxTelemetryItemsPerSecond>
          <ExcludedTypes>Event</ExcludedTypes>
        </Add>
        <Add Type="Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel.AdaptiveSamplingTelemetryProcessor, Microsoft.AI.ServerTelemetryChannel">
          <MaxTelemetryItemsPerSecond>5</MaxTelemetryItemsPerSecond>
          <IncludedTypes>Event</IncludedTypes>
        </Add>
      </TelemetryProcessors>
      <TelemetryChannel Type="Microsoft.ApplicationInsights.WindowsServer.TelemetryChannel.ServerTelemetryChannel, Microsoft.AI.ServerTelemetryChannel" />
    </Add>
  </TelemetrySinks>
  <TelemetryInitializers>
    <Add Type="Microsoft.ApplicationInsights.DependencyCollector.HttpDependenciesParsingTelemetryInitializer, Microsoft.AI.DependencyCollector" />
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.AzureRoleEnvironmentTelemetryInitializer, Microsoft.AI.WindowsServer" />
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.BuildInfoConfigComponentVersionTelemetryInitializer, Microsoft.AI.WindowsServer" />
    <Add Type="Microsoft.ApplicationInsights.Web.WebTestTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.SyntheticUserAgentTelemetryInitializer, Microsoft.AI.Web">
      <Filters>search|spider|crawl|Bot|Monitor|AlwaysOn</Filters>
    </Add>
    <Add Type="Microsoft.ApplicationInsights.Web.ClientIpHeaderTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.AzureAppServiceRoleNameFromHostNameHeaderInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.OperationNameTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.OperationCorrelationTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.UserTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.AuthenticatedUserIdTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.AccountIdTelemetryInitializer, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.SessionTelemetryInitializer, Microsoft.AI.Web" />
  </TelemetryInitializers>
  <TelemetryModules>
    <Add Type="Microsoft.ApplicationInsights.DependencyCollector.DependencyTrackingTelemetryModule, Microsoft.AI.DependencyCollector">
      <ExcludeComponentCorrelationHttpHeadersOnDomains>
        <Add>core.windows.net</Add>
        <Add>core.chinacloudapi.cn</Add>
        <Add>core.cloudapi.de</Add>
        <Add>core.usgovcloudapi.net</Add>
      </ExcludeComponentCorrelationHttpHeadersOnDomains>
      <IncludeDiagnosticSourceActivities>
        <Add>Microsoft.Azure.EventHubs</Add>
        <Add>Microsoft.Azure.ServiceBus</Add>
      </IncludeDiagnosticSourceActivities>
    </Add>
    <Add Type="Microsoft.ApplicationInsights.Extensibility.PerfCounterCollector.PerformanceCollectorModule, Microsoft.AI.PerfCounterCollector">
    </Add>
    <Add Type="Microsoft.ApplicationInsights.Extensibility.PerfCounterCollector.QuickPulse.QuickPulseTelemetryModule, Microsoft.AI.PerfCounterCollector" />
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.AppServicesHeartbeatTelemetryModule, Microsoft.AI.WindowsServer" />
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.AzureInstanceMetadataTelemetryModule, Microsoft.AI.WindowsServer"></Add>
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.DeveloperModeWithDebuggerAttachedTelemetryModule, Microsoft.AI.WindowsServer" />
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.UnhandledExceptionTelemetryModule, Microsoft.AI.WindowsServer" />
    <Add Type="Microsoft.ApplicationInsights.WindowsServer.UnobservedExceptionTelemetryModule, Microsoft.AI.WindowsServer"></Add>
    <Add Type="Microsoft.ApplicationInsights.Web.RequestTrackingTelemetryModule, Microsoft.AI.Web">
      <Handlers>
        <Add>Microsoft.VisualStudio.Web.PageInspector.Runtime.Tracing.RequestDataHttpHandler</Add>
        <Add>System.Web.StaticFileHandler</Add>
        <Add>System.Web.Handlers.AssemblyResourceLoader</Add>
        <Add>System.Web.Optimization.BundleHandler</Add>
        <Add>System.Web.Script.Services.ScriptHandlerFactory</Add>
        <Add>System.Web.Handlers.TraceHandler</Add>
        <Add>System.Web.Services.Discovery.DiscoveryRequestHandler</Add>
        <Add>System.Web.HttpDebugHandler</Add>
      </Handlers>
    </Add>
    <Add Type="Microsoft.ApplicationInsights.Web.ExceptionTrackingTelemetryModule, Microsoft.AI.Web" />
    <Add Type="Microsoft.ApplicationInsights.Web.AspNetDiagnosticTelemetryModule, Microsoft.AI.Web" />
  </TelemetryModules>
  <ApplicationIdProvider Type="Microsoft.ApplicationInsights.Extensibility.Implementation.ApplicationId.ApplicationInsightsApplicationIdProvider, Microsoft.ApplicationInsights" />
</ApplicationInsights>

静态文件请求未被采集是RequestTrackingTelemetryModule的默认过滤规则导致，按以下步骤修改即可：

1. 定位到配置文件中Microsoft.ApplicationInsights.Web.RequestTrackingTelemetryModule的注册节点，在<Handlers>节点同级新增配置<EnableStaticFileTracking>true</EnableStaticFileTracking>，显式开启静态文件请求追踪。现有配置的Handlers列表已经包含System.Web.StaticFileHandler，无需调整Handlers内容，修改后该节点结构如下：

   <Add Type="Microsoft.ApplicationInsights.Web.RequestTrackingTelemetryModule, Microsoft.AI.Web">
     <EnableStaticFileTracking>true</EnableStaticFileTracking>
     <Handlers>
       <Add>Microsoft.VisualStudio.Web.PageInspector.Runtime.Tracing.RequestDataHttpHandler</Add>
       <Add>System.Web.StaticFileHandler</Add>
       <Add>System.Web.Handlers.AssemblyResourceLoader</Add>
       <Add>System.Web.Optimization.BundleHandler</Add>
       <Add>System.Web.Script.Services.ScriptHandlerFactory</Add>
       <Add>System.Web.Handlers.TraceHandler</Add>
       <Add>System.Web.Services.Discovery.DiscoveryRequestHandler</Add>
       <Add>System.Web.HttpDebugHandler</Add>
     </Handlers>
   </Add>
   

2. 调整采样阈值避免日志被丢弃：当前配置的自适应采样规则对非Event类型遥测设置了每秒最多5条的上限，静态文件请求量通常远高于业务接口请求，该阈值会导致绝大多数静态请求被采样过滤。可根据实际业务量适当调大对应AdaptiveSamplingTelemetryProcessor节点的MaxTelemetryItemsPerSecond值，例如调整为20，保证静态请求日志能正常上报。
3. 配置修改完成后保存文件，重启站点，发起静态资源请求后等待3-5分钟，即可在Application Insights的请求日志视图中查询到图片、ico、静态脚本/样式等资源的请求记录。

补充说明：如果是ASP.NET Core项目，除了修改对应appsettings.json中的Application Insights配置外，还需要在服务注册阶段显式开启静态文件追踪：

builder.Services.Configure<RequestTrackingOptions>(o => o.EnableStaticFileTracking = true);

内容的提问来源于stack exchange，提问作者OzBob