sdk-csharp/test/CloudNative.CloudEvents.UnitTests/Http/HttpWebExtensionsTest.cs

// Copyright 2021 Cloud Native Foundation. 
// Licensed under the Apache 2.0 license.
// See LICENSE file in the project root for full license information.

using CloudNative.CloudEvents.NewtonsoftJson;
using System;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Mime;
using System.Threading.Tasks;
using Xunit;
using static CloudNative.CloudEvents.UnitTests.TestHelpers;

namespace CloudNative.CloudEvents.Http.UnitTests
{
    public class HttpWebExtensionsTest : HttpTestBase
    {
        [Fact]
        public async Task HttpBinaryWebRequestSendTest()
        {
            var cloudEvent = new CloudEvent
            {
                Type = "com.github.pull.create",
                Source = new Uri("https://github.com/cloudevents/spec/pull/123"),
                Id = "A234-1234-1234",
                Time = SampleTimestamp,
                DataContentType = MediaTypeNames.Text.Xml,
                Data = "<much wow=\"xml\"/>",
                ["comexampleextension1"] = "value",
                ["utf8examplevalue"] = "æøå"
            };

            string ctx = Guid.NewGuid().ToString();
            HttpWebRequest httpWebRequest = WebRequest.CreateHttp(ListenerAddress + "ep");
            httpWebRequest.Method = "POST";
            await httpWebRequest.CopyFromAsync(cloudEvent, ContentMode.Binary, new JsonEventFormatter());
            httpWebRequest.Headers.Add(TestContextHeader, ctx);

            PendingRequests.TryAdd(ctx, context =>
            {
                try
                {
                    var receivedCloudEvent = context.Request.ToCloudEvent(new JsonEventFormatter());

                    Assert.Equal(CloudEventsSpecVersion.V1_0, receivedCloudEvent.SpecVersion);
                    Assert.Equal("com.github.pull.create", receivedCloudEvent.Type);
                    Assert.Equal(new Uri("https://github.com/cloudevents/spec/pull/123"), receivedCloudEvent.Source);
                    Assert.Equal("A234-1234-1234", receivedCloudEvent.Id);
                    AssertTimestampsEqual(SampleTimestamp, cloudEvent.Time.Value);
                    Assert.Equal(MediaTypeNames.Text.Xml, receivedCloudEvent.DataContentType);
                    Assert.Equal("<much wow=\"xml\"/>", receivedCloudEvent.Data);

                    // The non-ASCII attribute value should have been URL-encoded using UTF-8 for the header.
                    Assert.Equal("%C3%A6%C3%B8%C3%A5", context.Request.Headers["ce-utf8examplevalue"]);

                    Assert.Equal("value", receivedCloudEvent["comexampleextension1"]);
                    Assert.Equal("æøå", receivedCloudEvent["utf8examplevalue"]);
                    context.Response.StatusCode = (int)HttpStatusCode.NoContent;
                }
                catch (Exception e)
                {
                    using (var sw = new StreamWriter(context.Response.OutputStream))
                    {
                        sw.Write(e.ToString());
                        context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
                    }
                }

                context.Response.Close();
                return Task.CompletedTask;
            });

            var result = (HttpWebResponse)await httpWebRequest.GetResponseAsync();
            if (result.StatusCode != HttpStatusCode.NoContent)
            {
                throw new InvalidOperationException(result.StatusCode.ToString());
            }
        }

        [Fact]
        public async Task HttpStructuredWebRequestSendTest()
        {
            var cloudEvent = new CloudEvent
            {
                Type = "com.github.pull.create",
                Source = new Uri("https://github.com/cloudevents/spec/pull/123"),
                Id = "A234-1234-1234",
                Time = SampleTimestamp,
                DataContentType = MediaTypeNames.Text.Xml,
                Data = "<much wow=\"xml\"/>",
                ["comexampleextension1"] = "value",
                ["utf8examplevalue"] = "æøå"
            };

            string ctx = Guid.NewGuid().ToString();
            HttpWebRequest httpWebRequest = WebRequest.CreateHttp(ListenerAddress + "ep");
            httpWebRequest.Method = "POST";
            await httpWebRequest.CopyFromAsync(cloudEvent, ContentMode.Structured, new JsonEventFormatter());
            httpWebRequest.Headers.Add(TestContextHeader, ctx);

            PendingRequests.TryAdd(ctx, context =>
            {
                try
                {
                    // Structured events do not contain any CloudEvent HTTP headers.
                    Assert.Empty(context.Request.Headers.AllKeys.Where(key => key.StartsWith("ce-")));

                    var receivedCloudEvent = context.Request.ToCloudEvent(new JsonEventFormatter());

                    Assert.Equal(CloudEventsSpecVersion.V1_0, receivedCloudEvent.SpecVersion);
                    Assert.Equal("com.github.pull.create", receivedCloudEvent.Type);
                    Assert.Equal(new Uri("https://github.com/cloudevents/spec/pull/123"), receivedCloudEvent.Source);
                    Assert.Equal("A234-1234-1234", receivedCloudEvent.Id);
                    AssertTimestampsEqual(SampleTimestamp, cloudEvent.Time.Value);
                    Assert.Equal(MediaTypeNames.Text.Xml, receivedCloudEvent.DataContentType);
                    Assert.Equal("<much wow=\"xml\"/>", receivedCloudEvent.Data);

                    Assert.Equal("value", receivedCloudEvent["comexampleextension1"]);
                    Assert.Equal("æøå", receivedCloudEvent["utf8examplevalue"]);
                    context.Response.StatusCode = (int)HttpStatusCode.NoContent;
                }
                catch (Exception e)
                {
                    using (var sw = new StreamWriter(context.Response.OutputStream))
                    {
                        sw.Write(e.ToString());
                        context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
                    }
                }

                context.Response.Close();
                return Task.CompletedTask;
            });

            var result = (HttpWebResponse)await httpWebRequest.GetResponseAsync();
            if (result.StatusCode != HttpStatusCode.NoContent)
            {
                throw new InvalidOperationException(result.StatusCode.ToString());
            }
        }
    }
}