When I use Audit.NET.WebApi in my Core 2.2 project is blanks out my request body.

Middleware registration

            application
            .UseAuditMiddleware(_ => _
                .FilterByRequest(rq => !rq.Path.Value.EndsWith("favicon.ico"))
                .WithEventType("{verb}:{url}")
                .IncludeHeaders()
                .IncludeResponseHeaders()
                .IncludeRequestBody()
                .IncludeResponseBody());

MVC Builder Options

                    options.AddAuditFilter(config => config
                        .LogAllActions()
                        .WithEventType("{verb}.{controller}.{action}")
                        .IncludeHeaders(ctx => !ctx.ModelState.IsValid)
                        .IncludeRequestBody()
                        .IncludeModelState()
                        .IncludeResponseBody(ctx => ctx.HttpContext.Response.StatusCode == 200));

Response from MVC

{
  "errors": {
    "": [
      "A non-empty request body is required."
    ]
  },
  "title": "One or more validation errors occurred.",
  "status": 400,
  "traceId": "0HLP5K21HO1PH:00000001"
}

Audit JSON file output during a request:

{"EventType":"POST.Entity.Post","Environment":{"UserName":"REDACTED","MachineName":"REDACTED","DomainName":"REDACTED","CallingMethodName":"MyApp.EntityCreation.Controllers.EntityController.Post()","AssemblyName":"MyApp.EntityCreation, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null","Culture":"en-US"},"StartDate":"2019-08-20T18:59:22.4398849","EndDate":"2019-08-20T18:59:22.5187417","Duration":79,"Action":{"TraceId":"0HLP5K21HO1PH:00000001","HttpMethod":"POST","ControllerName":"Entity","ActionName":"Post","ActionParameters":{"cancellationToken":{"IsCancellationRequested":false,"CanBeCanceled":true,"WaitHandle":{"Handle":{"value":1668},"SafeWaitHandle":{"IsInvalid":false,"IsClosed":false}}}},"RequestUrl":"http://localhost/Entity","IpAddress":"::1","ResponseStatus":"Bad Request","ResponseStatusCode":400,"RequestBody":{"Type":"application/json","Length":171,"Value":"{\n\t\"FirstName\": \"dfg\",\n\t\"LastName\": \"dfg\",\n\t\"MiddleName\": \"fsdfg\",\n\t\"PreferredFirstName\": \"\",\n\t\"EmailAddress\": \"\",\n\t\"EmployeeId\": \"\",\n\t\"StudentId\": \"\",\n\t\"WustlEduId\": \"\"\n}"},"ResponseBody":{"Type":"BadRequestObjectResult","Value":{"errors":{"":["A non-empty request body is required."]},"title":"One or more validation errors occurred.","status":400,"traceId":"0HLP5K21HO1PH:00000001"}},"Headers":{"Content-Type":"application/json","Accept":"*/*","Authorization":"Basic Sm9objpEb2U=","Host":"localhost","User-Agent":"insomnia/6.6.2","Content-Length":"171"},"ResponseHeaders":{"Content-Type":"application/problem+json; charset=utf-8"},"ModelStateValid":false,"ModelStateErrors":{"":"A non-empty request body is required."}}}

Simply commenting out the UseAuditMiddleware solves the problem and the exact same request succeeds without issue.

[thepirat000]

Did you see this note?

When using IncludeRequestBody you have to make sure to enable rewind on the request body stream, otherwise the controller won’t be able to read the request body since, by default, it’s a forwand-only stream that can be read only once. You can enable rewind on your startup logic with the following code:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    app.Use(async (context, next) => {  // <----
        context.Request.EnableBuffering(); // or .EnableRewind();
        await next();
    });
    
    app.UseMvc();
}

[VictorioBerra]

Upon further reading, I think I misunderstood what the new feature was. We can probably disregard.