Implemented minimal WebTransport Middleware

[Daniel-Genkin-MS-2]

Quick PR to add a new project for the WebTransport Middleware. This will eventually host the WebTransport API.

TODO

• Add sample project
• Add test project

[davidfowl]

What does the WebTransport API look like? Is there a new API we're adding here? What does this middleware do?

[Daniel-Genkin-MS-2]

Just squashed the commits to get a nicer permalink for my other PR (#41949). No code changes were made.

[Daniel-Genkin-MS-2]

What does the WebTransport API look like? Is there a new API we're adding here? What does this middleware do?

Those are great questions! I don't know yet as I am doing everything very incrementally. My next follow up PR will hopefully answer these questions. This PR just sets up the project.

[Tratcher]

What does the WebTransport API look like? Is there a new API we're adding here? What does this middleware do?

Those are great questions! I don't know yet as I am doing everything very incrementally. My next follow up PR will hopefully answer these questions. This PR just sets up the project.

The theory is that it will work similar to WebSockets, there will be a new Feature that you can call Accept on and get back a WebTransport abstraction. We don't know the shape of that yet, but it may mirror the client side JS APIs.

[halter73]

The theory is that it will work similar to WebSockets,

Is it similar enough to consider putting the WebTransport middleware in the Microsoft.AspNetCore.WebSockets assembly?

[Tratcher]

The theory is that it will work similar to WebSockets,

Is it similar enough to consider putting the WebTransport middleware in the Microsoft.AspNetCore.WebSockets assembly?

I would only do that if we expected them to share any code. I don't think that will be the case.

[davidfowl]

So in theory when we ship this would it go into the BCL networking APIs?

[Tratcher]

So in theory when we ship this would it go into the BCL networking APIs?

Only the symmetrical parts (if any), similar to the WebSocket type.

[davidfowl]

Only the symmetrical parts (if any), similar to the WebSocket type.

Yes, like the entire WebSocket implementation 😄

[Tratcher]

After yesterday's design discussion it looks like most of the WebTransport functionality will need to be built directly into Kestrel. Let's pause this PR until we're sure if we need the middleware package or not.

[Daniel-Genkin-MS-2]

After yesterday's design discussion it looks like most of the WebTransport functionality will need to be built directly into Kestrel. Let's pause this PR until we're sure if we need the middleware package or not.

I agree. By "pause", do you mean close or just stop committing to it?

[Tratcher]

How about you close the PR but keep the branch in case we need it later.