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Update streaming-roadmap.md

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Wenbo Zhu 2020-10-09 10:19:57 -07:00 committed by GitHub
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@ -26,8 +26,6 @@ in gRPC-Web (and Envoy) which will also enable half-duplex bidi streaming suppor
# Full-duplex streaming over HTTP
We have no plan to support full-duplex streaming over WebSockets (over TCP or HTTP/2). We will not publish any experimental spec for gRPC over WebSockets either.
It is possible to support bidi communication over dual HTTP requests, one for download-streaming and the other for upload-streaming,
similar to what's implemented by Google to support the [W3C Speech API](https://wicg.github.io/speech-api/).
@ -36,3 +34,9 @@ Once client-streaming is supported in gRPC-Web, we will publish a spec to enable
# Full-duplex streaming over Web-transport
We are working with the Chromium Blink team to evaluate how to leverage this whole new transport and QUIC. Stay tuned.
# Issues with WebSockets
We have no plan to support full-duplex streaming over WebSockets (over TCP or HTTP/2). We will not publish any experimental spec for gRPC over WebSockets either.
The main issue with WebSockets is its incompatibility with HTTP, i.e. the ubiquitous Web infrastructure. This means HTTP fallback is always needed. Recent IETF proposal to tunnel WebSockets over HTTP/2 is not widely implemented either.