HTTP/2 protocol in Julia about typedbclient.jl HOT 8 CLOSED

Calling into nghttp2 lib (nghttp2_jll), that seems to be working.

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Calling into nghttp2 lib (nghttp2_jll), that seems to be working.

oh nice! thx for the hint.

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Imho for now we can close this issue because the implementation we have is for now sufficient.

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It'd be nice to probably have a NGHTTP2.jl package that wrapped the ccalls in a more Julia API. That would facilitate incorporating support into HTTP.jl.

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I will share what I got so far.

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@ScottPJones managed to get these packages to work again.

HTTP/2.jl
HPack.jl

That was required for gRPC.jl to work again.
It works now, but we don't know in which state it is yet.

@markdroth from gRPC mentioned they would help facilitate the work, clarify requirements, do API reviews, set up interop tests, but that hasn't started yet.

Also, there is HTTP/2 support now in LibCURL.jl, but that isn't compatible to gRPC.

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Can you explain why libcurl isn't compatible with grpc?

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Not in detail, I just asked that in the gRPC Gitter and got this reply:

Can libcurl be used as a http/2 layer to build a gRPC lib based on shared c?

Eric Anderson
@ejona86
Feb. 08 19:03
No, there's no support for that.

M. Schulze
@mkschulze
Feb. 09 21:50
okay, and is that planned maybe or would it be much of a problem? I ask because starting from Julia 1.6, there will be libcurl in the standard library, which supports HTTP/2, so that could ease development of a gRPC library in Julia a lot potentially I think.

Eric Anderson
@ejona86
Feb. 09 23:53

I don't think that really changes difficulty of using C core from Julia; the API would stay the same. Best case the binaries are a little bit smaller, but I wouldn't assume that'd be the case.

On the other side, someone could use it to build a native Julia implementation.

But no, I'm not aware of any planned support. You're the first to mention libcurl+grpc to my knowledge.

Then he mentioned this as a starting point to wrap their C core library: grpc/grpc#15460

So, maybe it could work, it just isn't supported right now.

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