Node.js support for WebTransport

[wilaw]

Having support for WebTransport within Node.js would accelerate development of prototypes within the W3C WebTransport community. What can be done to initiate or support this functionality?

May be predicated on HTTP/3 support within node nodejs/node#38478.

Any other blockers?

[vasilvv]

There is at least one implementation I am aware of, though I am not sure how their API compares to the W3C one.

[aboba]

The FAILS implementation isn't production ready and hasn't been kept up to date.

[martenrichter]

The FAILS implementation isn't production ready and hasn't been kept up to date.

I don't know if it is production ready.
But I synced the master branch every Saturday to current quiche changes and I also backport changes, so the master branch is at least as up-to-date as quiche is. However, I did not implement yet BYOB. Or do you mean recent changes in the spec?
But I have not released it for a while, are the changes in quiche since the last release sufficient for a new version?

Anyway, the API follows closely the W3C draft. With some additions for the server.

Besides, there is a PR for a test from a contributor, which is a bit stuck. The main problems, why the test is not progressing, are a lot of race conditions in the tests itself, which depends on the machine (but is not triggered on my machine), and a problem in chromium.

[jasnell]

I'm hoping to get QUIC support landed fully in Node.js by the end of the year, which will hopefully also include WebTransport API support. However, that's still not set in stone.

[wilaw]

@jasnell and @martenrichter - thanks for your feedback. We notified the WG of your work and are monitoring progress with anticipation. If there are any API changes you feel you need for node.js integration, please be sure to notify us via issue.

[martenrichter]

@wilaw
Will do. Does this apply only client side? (I use an api server side, which close/identical to client side).
So far for all implemented features, most were implemented without changes. But there are some extensions partly requested by users, can collect them and create issues.

[wilaw]

I'm hoping to get QUIC support landed fully in Node.js by the end of the year, which will hopefully also include WebTransport API support.

@jasnell - any holiday update on the progress of this initiative?

[endel]

I've just released a "playground" prototype using @martenrichter's @fails-components/webtransport: https://github.com/endel/webtransport-nodejs - it works locally on Chrome by opening https://localhost:4433 -> selecting "Advanced" -> "Proceed to localhost (unsafe)"

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EDIT: Live version is available at https://web-transport.dev

[martenrichter]

May be I should update on the status of the node.js package (many changes in the last weeks):

• Uses now the node.js eventloop (custom Reader/Writer as suggested by Victor Vasilev a while ago)
• Different transports are now supported (including the initial libquiche http/3, a node.js based http/2 (though settings require an node.js update, PRs are in the pipeline), and WebTransport over WebSocket support
• Also acts as a polyfill for the browser using the same code basis (WebTransport over WebSocket only).
• http/3 transport is now provided as a separate package.

Due to the new structure, it might be possible, if some QUIC/http/3 is available on node.js to built a separate transport.

[jasnell]

QUIC in Node.js is still in progress but moving forward. No ETA on completion as my availability to work on it is quite limited but it is making progress

[fawazahmed0]

libp2p seems to have a js package for webtransport

[martenrichter]

libp2p seems to have a js package for webtransport

Which is for the browser side and built around the usual WebTransport interface the browser exposes: see:
https://github.com/libp2p/js-libp2p/blob/a3692509feceb546b1ef2f7b5fe3138cfa43e930/packages/transport-webtransport/src/index.ts#L114