[ASP.NET Core] Add back netstandard2.0 and 2.1 targets

src/OpenTelemetry.Instrumentation.AspNetCore/.publicApi/netstandard2.0/PublicAPI.Unshipped.txt

@@ -9,4 +9,6 @@ OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions.Record
 OpenTelemetry.Metrics.MeterProviderBuilderExtensions
 OpenTelemetry.Trace.TracerProviderBuilderExtensions
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Metrics.MeterProviderBuilder builder) -> OpenTelemetry.Metrics.MeterProviderBuilder
-static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder, System.Action<OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions> configureAspNetCoreInstrumentationOptions = null) -> OpenTelemetry.Trace.TracerProviderBuilder
+static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder) -> OpenTelemetry.Trace.TracerProviderBuilder
+static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder, string name, System.Action<OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions> configureAspNetCoreInstrumentationOptions) -> OpenTelemetry.Trace.TracerProviderBuilder
+static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder, System.Action<OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions> configureAspNetCoreInstrumentationOptions) -> OpenTelemetry.Trace.TracerProviderBuilder

src/OpenTelemetry.Instrumentation.AspNetCore/.publicApi/netstandard2.1/PublicAPI.Unshipped.txt

@@ -11,4 +11,6 @@ OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions.Record
 OpenTelemetry.Metrics.MeterProviderBuilderExtensions
 OpenTelemetry.Trace.TracerProviderBuilderExtensions
 static OpenTelemetry.Metrics.MeterProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Metrics.MeterProviderBuilder builder) -> OpenTelemetry.Metrics.MeterProviderBuilder
-static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder, System.Action<OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions> configureAspNetCoreInstrumentationOptions = null) -> OpenTelemetry.Trace.TracerProviderBuilder
+static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder) -> OpenTelemetry.Trace.TracerProviderBuilder
+static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder, string name, System.Action<OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions> configureAspNetCoreInstrumentationOptions) -> OpenTelemetry.Trace.TracerProviderBuilder
+static OpenTelemetry.Trace.TracerProviderBuilderExtensions.AddAspNetCoreInstrumentation(this OpenTelemetry.Trace.TracerProviderBuilder builder, System.Action<OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreInstrumentationOptions> configureAspNetCoreInstrumentationOptions) -> OpenTelemetry.Trace.TracerProviderBuilder

src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+* Added back `netstandard2.0` and `netstandard2.1` targets.
+([#3755](https://github.com/open-telemetry/opentelemetry-dotnet/pull/3755))
+
 ## 1.0.0-rc9.8
 
 Released 2022-Oct-17

src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInListener.cs

@@ -19,11 +19,17 @@
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection;
+#if !NETSTANDARD2_0
 using System.Runtime.CompilerServices;
+#endif
 using Microsoft.AspNetCore.Http;
+#if NET6_0_OR_GREATER
 using Microsoft.AspNetCore.Mvc.Diagnostics;
+#endif
 using OpenTelemetry.Context.Propagation;
+#if !NETSTANDARD2_0
 using OpenTelemetry.Instrumentation.GrpcNetClient;
+#endif
 using OpenTelemetry.Internal;
 using OpenTelemetry.Trace;
 
@@ -52,6 +58,11 @@ internal class HttpInListener : ListenerHandler
         private const string UnknownHostName = "UNKNOWN-HOST";
 
         private static readonly Func<HttpRequest, string, IEnumerable<string>> HttpRequestHeaderValuesGetter = (request, name) => request.Headers[name];
+#if !NET6_0_OR_GREATER
+        private readonly PropertyFetcher<object> beforeActionActionDescriptorFetcher = new("actionDescriptor");
+        private readonly PropertyFetcher<object> beforeActionAttributeRouteInfoFetcher = new("AttributeRouteInfo");
+        private readonly PropertyFetcher<string> beforeActionTemplateFetcher = new("Template");
+#endif
         private readonly PropertyFetcher<Exception> stopExceptionFetcher = new("Exception");
         private readonly AspNetCoreInstrumentationOptions options;
 
@@ -235,6 +246,7 @@ public void OnStopActivity(Activity activity, object payload)
 
                 activity.SetTag(SemanticConventions.AttributeHttpStatusCode, response.StatusCode);
 
+#if !NETSTANDARD2_0
                 if (this.options.EnableGrpcAspNetCoreSupport && TryGetGrpcMethod(activity, out var grpcMethod))
                 {
                     AddGrpcAttributes(activity, grpcMethod, context);
@@ -243,6 +255,12 @@ public void OnStopActivity(Activity activity, object payload)
                 {
                     activity.SetStatus(SpanHelper.ResolveSpanStatusForHttpStatusCode(activity.Kind, response.StatusCode));
                 }
+#else
+                if (activity.Status == ActivityStatusCode.Unset)
+                {
+                    activity.SetStatus(SpanHelper.ResolveSpanStatusForHttpStatusCode(activity.Kind, response.StatusCode));
+                }
+#endif
 
                 try
                 {
@@ -310,8 +328,14 @@ public void OnMvcBeforeAction(Activity activity, object payload)
 
             if (activity.IsAllDataRequested)
             {
+#if !NET6_0_OR_GREATER
+                _ = this.beforeActionActionDescriptorFetcher.TryFetch(payload, out var actionDescriptor);
+                _ = this.beforeActionAttributeRouteInfoFetcher.TryFetch(actionDescriptor, out var attributeRouteInfo);
+                _ = this.beforeActionTemplateFetcher.TryFetch(attributeRouteInfo, out var template);
+#else
                 var beforeActionEventData = payload as BeforeActionEventData;
                 var template = beforeActionEventData.ActionDescriptor?.AttributeRouteInfo?.Template;
+#endif
                 if (!string.IsNullOrEmpty(template))
                 {
                     // override the span name that was previously set to the path part of URL.
@@ -368,6 +392,7 @@ private static string GetUri(HttpRequest request)
             var length = scheme.Length + Uri.SchemeDelimiter.Length + host.Length + pathBase.Length
                          + path.Length + queryString.Length;
 
+#if NETSTANDARD2_1_OR_GREATER || NET6_0_OR_GREATER
             return string.Create(length, (scheme, host, pathBase, path, queryString), (span, parts) =>
             {
                 CopyTo(ref span, parts.scheme);
@@ -386,8 +411,19 @@ static void CopyTo(ref Span<char> buffer, ReadOnlySpan<char> text)
                     }
                 }
             });
+#else
+            return new System.Text.StringBuilder(length)
+                .Append(scheme)
+                .Append(Uri.SchemeDelimiter)
+                .Append(host)
+                .Append(pathBase)
+                .Append(path)
+                .Append(queryString)
+                .ToString();
+#endif
         }
 
+#if !NETSTANDARD2_0
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private static bool TryGetGrpcMethod(Activity activity, out string grpcMethod)
         {
@@ -435,5 +471,6 @@ private static void AddGrpcAttributes(Activity activity, string grpcMethod, Http
                 }
             }
         }
+#endif
     }
 }

src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs

@@ -17,7 +17,9 @@
 using System.Diagnostics;
 using System.Diagnostics.Metrics;
 using Microsoft.AspNetCore.Http;
+#if NET6_0_OR_GREATER
 using Microsoft.AspNetCore.Routing;
+#endif
 using OpenTelemetry.Trace;
 
 namespace OpenTelemetry.Instrumentation.AspNetCore.Implementation
@@ -67,7 +69,7 @@ public override void OnEventWritten(string name, object payload)
                 }
 
                 TagList tags;
-
+#if NET6_0_OR_GREATER
                 var target = (context.GetEndpoint() as RouteEndpoint)?.RoutePattern.RawText;
 
                 // TODO: This is just a minimal set of attributes. See the spec for additional attributes:
@@ -95,6 +97,17 @@ public override void OnEventWritten(string name, object payload)
                         { SemanticConventions.AttributeHttpStatusCode, context.Response.StatusCode.ToString() },
                     };
                 }
+#else
+                tags = new TagList
+            {
+                { SemanticConventions.AttributeHttpFlavor, context.Request.Protocol },
+                { SemanticConventions.AttributeHttpScheme, context.Request.Scheme },
+                { SemanticConventions.AttributeHttpMethod, context.Request.Method },
+                { SemanticConventions.AttributeHttpHost, host },
+                { SemanticConventions.AttributeHttpStatusCode, context.Response.StatusCode.ToString() },
+            };
+
+#endif
 
                 this.httpServerDuration.Record(Activity.Current.Duration.TotalMilliseconds, tags);
             }

src/OpenTelemetry.Instrumentation.AspNetCore/OpenTelemetry.Instrumentation.AspNetCore.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <!-- OmniSharp/VS Code requires TargetFrameworks to be in descending order for IntelliSense and analysis. -->
-    <TargetFrameworks>net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net7.0;net6.0;netstandard2.1;netstandard2.0</TargetFrameworks>
     <Description>ASP.NET Core instrumentation for OpenTelemetry .NET</Description>
     <PackageTags>$(PackageTags);distributed-tracing;AspNetCore</PackageTags>
     <IncludeDiagnosticSourceInstrumentationHelpers>true</IncludeDiagnosticSourceInstrumentationHelpers>
@@ -17,6 +17,16 @@
     <ProjectReference Include="$(RepoRoot)\src\OpenTelemetry\OpenTelemetry.csproj" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+    <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="$(MicrosoftAspNetCoreHttpAbstractionsPkgVer)" />
+    <PackageReference Include="Microsoft.AspNetCore.Http.Features" Version="$(MicrosoftAspNetCoreHttpFeaturesPkgVer)" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
+    <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="$(MicrosoftAspNetCoreHttpAbstractionsPkgVer)" />
+    <PackageReference Include="Microsoft.AspNetCore.Http.Features" Version="$(MicrosoftAspNetCoreHttpFeaturesPkgVer)" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>