Please add support for server compression

Is your feature request related to a problem? Please describe.

Not really, other than the fact that I cannot migrate my server from grpc to @grpc/grpc-js until @grpc/grpc-js supports compression. Our clients (millions of them…) send messages compressed (gzip) in a bi-directional stream. Also, @grpc/grpc-js does not return an UNIMPLEMENTED error when the client sends the grpc-compression header with a value other than identity…

Describe the solution you’d like

Something along the lines of what is implemented in https://www.npmjs.com/package/grpc-server-js (I just perused through that code and found out that they already support compression) It also looks like this has been partially implemented in compression-filter.ts already… And I see a lot of TODO(cjihrig) in the code to point to the areas that should be modified.

Describe alternatives you’ve considered

Keep using the grpc package for now, even though it explicitly says that it has been deprecated. Compression is a major feature IMO, so maybe the deprecation was a little hasty?

[Lutzifer]

We also have a use case for this feature in our projects.

[murgatroid99]

Compression support in grpc-js has been expanded in the 1.5.x release: clients can now send compressed messages, and servers can now receive compressed messages. Support for sending compressed messages from servers is still pending.