Pass RequestDelegate to HandleRequestAsync (#737)

Author: sungam3r

src/Transports.AspNetCore/GraphQLHttpMiddleware.cs

@@ -146,11 +146,12 @@ public async Task InvokeAsync(HttpContext context, RequestDelegate next)
                 : await userContextBuilder.BuildUserContext(context);
 
             var executer = context.RequestServices.GetRequiredService<IGraphQLExecuter<TSchema>>();
-            await HandleRequestAsync(context, userContext, bodyGQLBatchRequest, gqlRequest, executer, cancellationToken);
+            await HandleRequestAsync(context, next, userContext, bodyGQLBatchRequest, gqlRequest, executer, cancellationToken);
         }
 
         protected virtual async Task HandleRequestAsync(
             HttpContext context,
+            RequestDelegate next,
             IDictionary<string, object> userContext,
             GraphQLRequest[] bodyGQLBatchRequest,
             GraphQLRequest gqlRequest,

tests/ApiApprovalTests/GraphQL.Server.Transports.AspNetCore.approved.txt

@@ -31,7 +31,7 @@ namespace GraphQL.Server.Transports.AspNetCore
         protected virtual System.Threading.Tasks.Task HandleInvalidContentTypeErrorAsync(Microsoft.AspNetCore.Http.HttpContext context) { }
         protected virtual System.Threading.Tasks.Task HandleInvalidHttpMethodErrorAsync(Microsoft.AspNetCore.Http.HttpContext context) { }
         protected virtual System.Threading.Tasks.Task HandleNoQueryErrorAsync(Microsoft.AspNetCore.Http.HttpContext context) { }
-        protected virtual System.Threading.Tasks.Task HandleRequestAsync(Microsoft.AspNetCore.Http.HttpContext context, System.Collections.Generic.IDictionary<string, object> userContext, GraphQL.Transport.GraphQLRequest[] bodyGQLBatchRequest, GraphQL.Transport.GraphQLRequest gqlRequest, GraphQL.Server.IGraphQLExecuter<TSchema> executer, System.Threading.CancellationToken cancellationToken) { }
+        protected virtual System.Threading.Tasks.Task HandleRequestAsync(Microsoft.AspNetCore.Http.HttpContext context, Microsoft.AspNetCore.Http.RequestDelegate next, System.Collections.Generic.IDictionary<string, object> userContext, GraphQL.Transport.GraphQLRequest[] bodyGQLBatchRequest, GraphQL.Transport.GraphQLRequest gqlRequest, GraphQL.Server.IGraphQLExecuter<TSchema> executer, System.Threading.CancellationToken cancellationToken) { }
         public System.Threading.Tasks.Task InvokeAsync(Microsoft.AspNetCore.Http.HttpContext context, Microsoft.AspNetCore.Http.RequestDelegate next) { }
         protected virtual System.Threading.Tasks.Task RequestExecutedAsync(in GraphQL.Server.Transports.AspNetCore.GraphQLRequestExecutionResult requestExecutionResult) { }
         protected virtual System.Threading.Tasks.Task RequestExecutingAsync(GraphQL.Transport.GraphQLRequest request, int? indexInBatch = default) { }