Upgrade Lambda Serverless ASP.NET Core Web API to .NET Core 2.2 with custom runtime

AWSServerless1/AWSServerless1.csproj

@@ -1,12 +1,18 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
     <PropertyGroup>
-        <TargetFramework>netcoreapp2.1</TargetFramework>
+        <TargetFramework>netcoreapp2.2</TargetFramework>
         <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
         <AWSProjectType>Lambda</AWSProjectType>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.4" />
+        <Content Include="bootstrap">
+            <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+        </Content>
+    </ItemGroup>
+    <ItemGroup>
+        <PackageReference Include="Microsoft.AspNetCore.App" />
         <PackageReference Include="Amazon.Lambda.AspNetCoreServer" Version="3.0.3" />
+        <PackageReference Include="Amazon.Lambda.RuntimeSupport" Version="1.0.0" />
         <PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="3.3.100.1" />
     </ItemGroup>
 </Project>

AWSServerless1/LocalEntryPoint.cs

@@ -1,16 +1,38 @@
+using Amazon.Lambda.APIGatewayEvents;
+using Amazon.Lambda.Core;
+using Amazon.Lambda.RuntimeSupport;
+using Amazon.Lambda.Serialization.Json;
 using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
+using System;
+using System.Threading.Tasks;
 
 namespace AWSServerless1
 {
     /// <summary>
     /// The Main function can be used to run the ASP.NET Core application locally using the Kestrel webserver.
+    /// It is now also the main entry point for the custom runtime.
     /// </summary>
     public class LocalEntryPoint
     {
-        public static void Main(string[] args)
+        private static readonly LambdaEntryPoint LambdaEntryPoint = new LambdaEntryPoint();
+        private static readonly Func<APIGatewayProxyRequest, ILambdaContext, Task<APIGatewayProxyResponse>> Func = LambdaEntryPoint.FunctionHandlerAsync;
+
+        public static async Task Main(string[] args)
         {
+#if DEBUG
             BuildWebHost(args).Run();
+#else
+            // Wrap the FunctionHandler method in a form that LambdaBootstrap can work with.
+            using (var handlerWrapper = HandlerWrapper.GetHandlerWrapper(Func, new JsonSerializer()))
+
+            // Instantiate a LambdaBootstrap and run it.
+            // It will wait for invocations from AWS Lambda and call the handler function for each one.
+            using (var bootstrap = new LambdaBootstrap(handlerWrapper))
+            {
+                await bootstrap.RunAsync();
+            }
+#endif
         }
 
         public static IWebHost BuildWebHost(string[] args) =>

AWSServerless1/Startup.cs

@@ -18,7 +18,7 @@ public Startup(IConfiguration configuration)
         // This method gets called by the runtime. Use this method to add services to the container
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
+            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline

AWSServerless1/aws-lambda-tools-defaults.json

@@ -8,8 +8,9 @@
     "profile": "default",
     "region": "ap-southeast-2",
     "configuration": "Release",
-    "framework": "netcoreapp2.1",
+    "framework": "netcoreapp2.2",
     "template": "serverless.template",
     "s3-bucket": "aws-serverless-md",
-    "stack-name": "AWSServerless1"
+    "stack-name": "AWSServerless1",
+    "msbuild-parameters": "--self-contained true"
 }

AWSServerless1/bootstrap

@@ -0,0 +1,4 @@
+#!/bin/sh
+# This is the script that the Lambda host calls to start the custom runtime.
+
+/var/task/AWSServerless1

AWSServerless1/serverless.template

@@ -8,8 +8,8 @@
 			"AspNetCoreFunction" : {
 				"Type" : "AWS::Serverless::Function",
 				"Properties": {
-				"Handler": "AWSServerless1::AWSServerless1.LambdaEntryPoint::FunctionHandlerAsync",
-				"Runtime": "dotnetcore2.1",
+				"Handler": "not_required_for_custom_runtime",
+				"Runtime": "provided",
 				"CodeUri": "",
 				"MemorySize": 256,
 				"Timeout": 30,

AWSServerless1/web.config

@@ -2,7 +2,7 @@
 <configuration>
   <system.webServer>
     <handlers>
-      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />
+      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
     </handlers>
     <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" forwardWindowsAuthToken="false" stdoutLogEnabled="false">
       <environmentVariables />