.NET HTTP/3 support on macOS

[alexandrehtrb]

Hello,

Is HTTP/3 support on macOS planned for .NET? (does it already have support?)

[teo-tsirpanis]

HTTP/3 is not supported for servers or clients on macOS because macOS lacks the necessary low-level APIs. See related discussion.

Maybe Xamarin's NSUrlSessionHandler supports HTTP/3 or can support it? I'm not sure.

[MihaZupan]

cc: @ManickaP @wfurt

[ManickaP]

Officially it isn't. But all you need is msquic lib to make it work. Once you place it next to the System.Net.Quic.dll, QUIC and H/3 will light up. Note that there's no official msquic package for OSX, so you'd need to build it yourself from the sources: https://github.com/microsoft/msquic.

Let me know if this is something you'd like to try, I can share more details and potentially help with any issues you hit.

[alexandrehtrb]

Are there plans for an official support?

[ManickaP]

Yep. As @wfurt mentioned bellow, @liveans is looking into it. But we don't have a set deadline and it might get pushed due to other higher prio work. So please don't hold your breath 😄

[wfurt]

we have brew formula if you want to give it try @alexandrehtrb. @liveans is working on submitting that to brew repo.