Update ASP.NET Core sample to use minimal host (#283)

* Update ASP.NET Core sample to use minimal host

Signed-off-by: Safia Abdalla <[email protected]>

Author: captainsafia

samples/CloudNative.CloudEvents.AspNetCoreSample/CloudNative.CloudEvents.AspNetCoreSample.http

@@ -0,0 +1,16 @@
+@HostAddress = https://localhost:5001
+
+POST {{HostAddress}}/api/events/receive
+Content-Type: application/json
+CE-SpecVersion: 1.0
+CE-Type: "com.example.myevent"
+CE-Source: "urn:example-com:mysource:abc"
+CE-Id: "c457b7c5-c038-4be9-98b9-938cb64a4fbf"
+
+{
+    "message": "Hello world!"
+}
+
+###
+
+GET {{HostAddress}}/api/events/generate

samples/CloudNative.CloudEvents.AspNetCoreSample/Program.cs

@@ -2,20 +2,22 @@
 // Licensed under the Apache 2.0 license.
 // See LICENSE file in the project root for full license information.
 
-using Microsoft.AspNetCore;
-using Microsoft.AspNetCore.Hosting;
+using CloudNative.CloudEvents.AspNetCoreSample;
+using Microsoft.AspNetCore.Builder;
+using CloudNative.CloudEvents.NewtonsoftJson;
+using Microsoft.Extensions.DependencyInjection;
 
-namespace CloudNative.CloudEvents.AspNetCoreSample
-{
-    public static class Program
-    {
-        public static void Main(string[] args)
-        {
-            CreateWebHostBuilder(args).Build().Run();
-        }
+var builder = WebApplication.CreateBuilder(args);
 
-        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
-            WebHost.CreateDefaultBuilder(args)
-                .UseStartup<Startup>();
-    }
-}
+builder.Services.AddControllers(opts =>
+    opts.InputFormatters.Insert(0, new CloudEventJsonInputFormatter(new JsonEventFormatter())));
+
+var app = builder.Build();
+
+app.MapControllers();
+
+app.Run();
+
+// Generated `Program` class when using top-level statements
+// is internal by default. Make this `public` here for tests.
+public partial class Program { }

samples/CloudNative.CloudEvents.AspNetCoreSample/Startup.cs

@@ -0,0 +1,44 @@
+# Samples
+
+This directory contains a sample ASP.NET Core application that exposes two endpoints for:
+
+- Receiving a CloudEvent (`/api/events/receive`)
+- Generating a CloudEvent (`/api/events/generate`)
+
+## Run the sample
+
+To run the sample, execute the `dotnet run` command in the `CloudNative.CloudEvents.AspNetCoreSample` directory.
+
+```shell
+dotnet run --framework net6.0
+```
+
+After running the web service using the command above, there are three strategies for sending requests to the web service.
+
+### Using the `HttpSend` tool
+
+The `HttpSend` project provides a CLI tool for sending requests to the `/api/events/receive` endpoint exposed by the service. To use the tool, navigate to the `HttpSend` directory and execute the following command:
+
+```shell
+dotnet run --framework net6.0 --url https://localhost:5001/api/events/receive
+```
+
+### Using the `.http` file
+
+The [CloudNative.CloudEvents.AspNetCore.http file](./CloudNative.CloudEvents.AspNetCoreSample/CloudNative.CloudEvents.AspNetCoreSample.http) can be used to send requests to the web service. Native support for executing requests in `.http` file is provided in JetBrains Rider and Visual Studio. Support for sending requests in VS Code is provided via the [REST Client extension](https://marketplace.visualstudio.com/items?itemName=humao.rest-client).
+
+### Using the `curl` command
+
+Requests to the web service can also be run using the `curl` command line tool.
+
+```shell
+curl --request POST \
+  --url https://localhost:5001/api/events/receive \
+  --header 'ce-id: "c457b7c5-c038-4be9-98b9-938cb64a4fbf"' \
+  --header 'ce-source: "urn:example-com:mysource:abc"' \
+  --header 'ce-specversion: 1.0' \
+  --header 'ce-type: "com.example.myevent"' \
+  --header 'content-type: application/json' \
+  --header 'user-agent: vscode-restclient' \
+  --data '{"message": "Hello world!"}'
+```

samples/README.md

@@ -13,11 +13,11 @@
 
 namespace CloudNative.CloudEvents.IntegrationTests.AspNetCore
 {
-    public class CloudEventControllerTests : IClassFixture<WebApplicationFactory<Startup>>
+    public class CloudEventControllerTests : IClassFixture<WebApplicationFactory<Program>>
     {
-        private readonly WebApplicationFactory<Startup> _factory;
+        private readonly WebApplicationFactory<Program> _factory;
 
-        public CloudEventControllerTests(WebApplicationFactory<Startup> factory)
+        public CloudEventControllerTests(WebApplicationFactory<Program> factory)
         {
             _factory = factory;
         }