Use IServiceProviderIsService to detect if a parameter is a service.

Author: davidfowl

src/Http/Http.Extensions/src/PublicAPI.Unshipped.txt

@@ -169,9 +169,9 @@ static Microsoft.AspNetCore.Http.HeaderDictionaryTypeExtensions.AppendList<T>(th
 static Microsoft.AspNetCore.Http.HeaderDictionaryTypeExtensions.GetTypedHeaders(this Microsoft.AspNetCore.Http.HttpRequest! request) -> Microsoft.AspNetCore.Http.Headers.RequestHeaders!
 static Microsoft.AspNetCore.Http.HeaderDictionaryTypeExtensions.GetTypedHeaders(this Microsoft.AspNetCore.Http.HttpResponse! response) -> Microsoft.AspNetCore.Http.Headers.ResponseHeaders!
 static Microsoft.AspNetCore.Http.HttpContextServerVariableExtensions.GetServerVariable(this Microsoft.AspNetCore.Http.HttpContext! context, string! variableName) -> string?
-static Microsoft.AspNetCore.Http.RequestDelegateFactory.Create(System.Delegate! action, System.IServiceProvider! serviceProvider) -> Microsoft.AspNetCore.Http.RequestDelegate!
-static Microsoft.AspNetCore.Http.RequestDelegateFactory.Create(System.Reflection.MethodInfo! methodInfo, System.IServiceProvider! serviceProvider) -> Microsoft.AspNetCore.Http.RequestDelegate!
-static Microsoft.AspNetCore.Http.RequestDelegateFactory.Create(System.Reflection.MethodInfo! methodInfo, System.IServiceProvider! serviceProvider, System.Func<Microsoft.AspNetCore.Http.HttpContext!, object!>! targetFactory) -> Microsoft.AspNetCore.Http.RequestDelegate!
+static Microsoft.AspNetCore.Http.RequestDelegateFactory.Create(System.Delegate! action, System.IServiceProvider? serviceProvider) -> Microsoft.AspNetCore.Http.RequestDelegate!
+static Microsoft.AspNetCore.Http.RequestDelegateFactory.Create(System.Reflection.MethodInfo! methodInfo, System.IServiceProvider? serviceProvider) -> Microsoft.AspNetCore.Http.RequestDelegate!
+static Microsoft.AspNetCore.Http.RequestDelegateFactory.Create(System.Reflection.MethodInfo! methodInfo, System.IServiceProvider? serviceProvider, System.Func<Microsoft.AspNetCore.Http.HttpContext!, object!>! targetFactory) -> Microsoft.AspNetCore.Http.RequestDelegate!
 static Microsoft.AspNetCore.Http.ResponseExtensions.Clear(this Microsoft.AspNetCore.Http.HttpResponse! response) -> void
 static Microsoft.AspNetCore.Http.ResponseExtensions.Redirect(this Microsoft.AspNetCore.Http.HttpResponse! response, string! location, bool permanent, bool preserveMethod) -> void
 static Microsoft.AspNetCore.Http.SendFileResponseExtensions.SendFileAsync(this Microsoft.AspNetCore.Http.HttpResponse! response, Microsoft.Extensions.FileProviders.IFileInfo! file, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task!

src/Http/Http.Extensions/src/RequestDelegateFactory.cs

@@ -64,18 +64,13 @@ public static class RequestDelegateFactory
         /// <param name="action">A request handler with any number of custom parameters that often produces a response with its return value.</param>
         /// <param name="serviceProvider">The <see cref="IServiceProvider"/> instance used to detect which parameters are services.</param>
         /// <returns>The <see cref="RequestDelegate"/>.</returns>
-        public static RequestDelegate Create(Delegate action, IServiceProvider serviceProvider)
+        public static RequestDelegate Create(Delegate action, IServiceProvider? serviceProvider)
         {
             if (action is null)
             {
                 throw new ArgumentNullException(nameof(action));
             }
 
-            if (serviceProvider is null)
-            {
-                throw new ArgumentNullException(nameof(serviceProvider));
-            }
-
             var targetExpression = action.Target switch
             {
                 object => Expression.Convert(TargetExpr, action.Target.GetType()),
@@ -96,18 +91,13 @@ public static RequestDelegate Create(Delegate action, IServiceProvider servicePr
         /// <param name="methodInfo">A static request handler with any number of custom parameters that often produces a response with its return value.</param>
         /// <param name="serviceProvider">The <see cref="IServiceProvider"/> instance used to detect which parameters are services.</param>
         /// <returns>The <see cref="RequestDelegate"/>.</returns>
-        public static RequestDelegate Create(MethodInfo methodInfo, IServiceProvider serviceProvider)
+        public static RequestDelegate Create(MethodInfo methodInfo, IServiceProvider? serviceProvider)
         {
             if (methodInfo is null)
             {
                 throw new ArgumentNullException(nameof(methodInfo));
             }
 
-            if (serviceProvider is null)
-            {
-                throw new ArgumentNullException(nameof(serviceProvider));
-            }
-
             var targetableRequestDelegate = CreateTargetableRequestDelegate(methodInfo, serviceProvider, targetExpression: null);
 
             return httpContext =>
@@ -123,18 +113,13 @@ public static RequestDelegate Create(MethodInfo methodInfo, IServiceProvider ser
         /// <param name="serviceProvider">The <see cref="IServiceProvider"/> instance used to detect which parameters are services.</param>
         /// <param name="targetFactory">Creates the <see langword="this"/> for the non-static method.</param>
         /// <returns>The <see cref="RequestDelegate"/>.</returns>
-        public static RequestDelegate Create(MethodInfo methodInfo, IServiceProvider serviceProvider, Func<HttpContext, object> targetFactory)
+        public static RequestDelegate Create(MethodInfo methodInfo, IServiceProvider? serviceProvider, Func<HttpContext, object> targetFactory)
         {
             if (methodInfo is null)
             {
                 throw new ArgumentNullException(nameof(methodInfo));
             }
 
-            if (serviceProvider is null)
-            {
-                throw new ArgumentNullException(nameof(serviceProvider));
-            }
-
             if (targetFactory is null)
             {
                 throw new ArgumentNullException(nameof(targetFactory));
@@ -154,7 +139,7 @@ public static RequestDelegate Create(MethodInfo methodInfo, IServiceProvider ser
             };
         }
 
-        private static Func<object?, HttpContext, Task> CreateTargetableRequestDelegate(MethodInfo methodInfo, IServiceProvider serviceProvider, Expression? targetExpression)
+        private static Func<object?, HttpContext, Task> CreateTargetableRequestDelegate(MethodInfo methodInfo, IServiceProvider? serviceProvider, Expression? targetExpression)
         {
             // Non void return type
 
@@ -255,12 +240,10 @@ private static Expression CreateArgument(ParameterInfo parameter, FactoryContext
             }
             else
             {
-                if (factoryContext.ServiceProvider != null)
+                if (factoryContext.ServiceProvider?.GetService<IServiceProviderIsService>() is IServiceProviderIsService serviceProviderIsService)
                 {
-                    using var scope = factoryContext.ServiceProvider.CreateScope();
-
                     // If the parameter resolves as a service then get it from services
-                    if (scope.ServiceProvider.GetService(parameter.ParameterType) is not null)
+                    if (serviceProviderIsService.IsService(parameter.ParameterType))
                     {
                         return Expression.Call(GetRequiredServiceMethod.MakeGenericMethod(parameter.ParameterType), RequestServicesExpr);
                     }