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Update streaming-roadmap.md

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Wenbo Zhu 2020-07-31 15:20:46 -07:00 committed by GitHub
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@ -21,20 +21,17 @@ upload-streaming over HTTP/1.1. We believe that upload-streaming should be enabl
the client deployment. As a result, if upload-streaming is only enabled over HTTP/2, a gRPC service will have to implement a non-streaming method
as a fallback for each client-streaming method.
Once the whatwg spec is finalized and upload-streaming is support by major browsers (2020-2021), we will add client-streaming support
Once the whatwg spec is finalized and upload-streaming is supported by major browsers (2020), we will add client-streaming support
in gRPC-Web (and Envoy) which will also enable half-duplex bidi streaming support.
# 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.
If you need build a Web application against a bidi gRPC service, you might choose to implement a custom client with something like socket.io.
On the server-side, the websocket messages will be handled by any language-specific Web framework, with a translation module to map websocket messages to gRPC messages.
Alternatively, it is possible to support bidi communication over dual HTTP requests, one for download-streaming and the other for upload-streaming,
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/).
Once client-streaming is supported in gRPC-Web, we will publish a spec to enable bidi streaming over dual HTTP requests and implement the complete support in Envoy (2021).
Once client-streaming is supported in gRPC-Web, we will publish a spec to enable bidi streaming over dual HTTP requests and implement the complete support in Envoy (2020+).
# Full-duplex streaming over Web-transport