aspnetcore: HttpLogger does not log RequestBody

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

HttpLogging does not log the RequestBody when configured to do so.

Expected Behavior

A log statement from HttpLogger with the actual body sent

Steps To Reproduce

using Microsoft.AspNetCore.HttpLogging;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddHttpLogging(c =>
{
  c.LoggingFields = HttpLoggingFields.RequestBody |
                    HttpLoggingFields.RequestPath |
                    HttpLoggingFields.ResponseBody;
});

var app = builder.Build();

app.UseHttpLogging();
app.MapPost("/", () => "Hello POST!");

app.Run();

Exceptions (if any)

Any request having a body towards the POST endpoint at root results in a log statement that says the body is empty when it’s not:

POST http://localhost:5145/ HTTP/1.1
User-Agent: vscode-restclient
Content-Type: text/plain
accept-encoding: gzip, deflate
content-length: 3

some text


HTTP/1.1 200 OK
Connection: close
Content-Type: text/plain; charset=utf-8
Date: Tue, 27 Jun 2023 22:13:05 GMT
Server: Kestrel
Transfer-Encoding: chunked

Hello POST!

info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST http://localhost:5145/ text/plain 3
info: Microsoft.AspNetCore.HttpLogging.HttpLoggingMiddleware[1]
      Request:
      PathBase: 
      Path: /
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'HTTP: POST /'
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'HTTP: POST /'
info: Microsoft.AspNetCore.HttpLogging.HttpLoggingMiddleware[3]
      RequestBody:    👈 👈 
info: Microsoft.AspNetCore.HttpLogging.HttpLoggingMiddleware[4]
      ResponseBody: Hello POST!
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 POST http://localhost:5145/ text/plain 3 - 200 - text/plain;+charset=utf-8 0.4329ms

.NET Version

7.0.203

Anything else?

Microsoft.AspNetCore.App 7.0.5 VSCode / Rider