HTTP 431 when header size over 32KB

[eduherminio]

I'm getting HTTP 431 status codes when making requests to a sheyenrath/wiremock.net image with headers over 32KB.

I assumed that the issue was KestrelServerLimits.MaxRequestHeadersTotalSize, but I'm failing to prove it.

I've created a local wiremock.net image with StandAlone.NETCoreApp using a local WireMock.Net package where I'm setting options.Limits.MaxRequestHeadersTotalSize = 150_000; in both .NET Standard1.3 and .NET Standard > 1.3, but I'm still getting those 431s.

Am I missing something? Any other idea of what could be causing those 431s?

[StefH]

Hello @eduherminio, does the same issue occur when you just run the StandAlone.NETCoreApp locally, so without docker?

[eduherminio]

Yes it does @StefH.

[StefH]

And you use a .NET Core 3.1 ?

[eduherminio]

My bad, I messed up the package versions. Modifying MaxRequestHeadersTotalSize does seem to fix the issue. Thanks!
I'll follow up with a separated issue/feature request to discuss the possibility of having it modified or allowing its modification, if that's OK with you.