Full-duplex streaming

[annevk]

HTTP, both 1 and 2, supports full-duplex in principle whereby the response arrives before the request is fully transmitted, as discussed in whatwg/fetch#229 and "implemented" in the Fetch Standard.

However, the testing infrastructure does not allow for testing this setup. This is problematic as it means browser support may be/remain spotty.

In that issue @Lukasa suggests hyper-h2 might be able to help with this (presumably only for HTTP/2).

This was filed as w3c/wptserve#80 before by @louiscryan, but I'm rather wary of that repository still being tracked as a source of suggestions.

[jakearchibald]

The latest Node.js seems to support duplex.

Here's a little echo server: https://gist.github.com/jakearchibald/d21b5b070d265efa3b16c6a566ae33fa

[kereliuk]

Are there existing manual tests that need this?

[annevk]

@JKereliuk manual tests have the same limitation with this missing...