Invalid TraceId field in the ProblemDetails response

Hi!

I’m using ASP.NET Core 3.0 with the last version of Hellang.Middleware.ProblemDetails (3.1.0). In my Startup.ConfigureServices method I have added the following line:

services.AddProblemDetails();

And the corresponding

app.UseProblemDetails();

At the beginning of the Configure method.

With this setup, I have noticed that the output is something like this:

{
  "type": "https://tools.ietf.org/html/rfc7231#section-6.5.1",
  "title": "Bad Request",
  "status": 400,
  "traceId": "|ce3cd73b-4af1db1e8a67d40f."
}

In particular, you can note that the traceId field seems to be invalid. Can you please investigate on this behavior?

[khellang]

In this case, it looks very much like the format of an Activity ID; https://github.com/dotnet/corefx/blob/master/src/System.Diagnostics.DiagnosticSource/src/ActivityUserGuide.md#id-format.

[khellang]

It depends on where your request is coming from and whether it includes a Request-Id or a Correlation-Context header, I think.

Activity also supports different formats, where “hierarchical” is the default. See https://github.com/dotnet/corefx/blob/master/src/System.Diagnostics.DiagnosticSource/src/HierarchicalRequestId.md.