OvermindDL1
I’ve been trying to see if Phoenix supports HTTP/2 but I am not able to see any hint of a sign of negotiation or how to PUSH data over HTTP/2? It would be nice if, say, the View’s could specify mandatory files to be pushed to the browser based on their knowledge of the templates for example. Is there something that I am missing?
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gregvaughn
That’s a feature of Cowboy. Here’s the issue: HTTP/2.0 not supported · Issue #853 · ninenines/cowboy · GitHub
hubertlepicki
OK, so the situation is as follows:
OvermindDL1
I figured that might be the case. I saw the issue in cowboy and thought HTTP/2 in it was dead as the issue appears dead and figured Phoenix was either waiting (fruitlessly based on the cowboy issue) on cowboy or was building their own but could not find anything for one way or the other. I am most curious in the PUSH aspect of HTTP/2 so I await to see what they come up with to support that. Is there any timeline on it all?
hubertlepicki
I think on the Cowboy’s side, it’s going to be around 6 months to stabilize things from what I’ve been told.
On Elixir’s side - not sure. I would expect preliminary protocol support first, with no assets push and only after some time inclusion of these. It needs to be handled on plug and phoenix level, so it’ll take time before used to full potential.
andre1sk
This is a weakest point of Erlang/Elixir web stack and could be a real challenge as implementing a quality http/2 server is a significantly more complex task than http/1.1 and it has very material impact on performance.
andre1sk
Anyone in the know where things stand with HTTP2 support?
josevalim
Here is the relevant issue: HTTP/2 support · Issue #258 · elixir-plug/plug · GitHub
TL;DR - there are some developers exploring HTTP2 with Plug and Phoenix already (potatosalad is awesome). There are also production ready implementations of HTTP2 in Erlang (Chatterbox) beyond the one in Cowboy master. If you need HTTP2 and you cannot wait for Plug/Phoenix, then you can always use directly from Cowboy master or Chatterbox.
andre1sk
Thanx for the info subscribed to the issue
ChaseGilliam
Does anyone know what the latest is on this? It looks like plug was updated and works with Cowboy 2’s http/2 support. Are there any docs on using this?
OvermindDL1
There is a Cowboy2 Adapter being built for Plug at this moment actually (as well as maybe N2O support too). They seem to be working on push support and the new websocket API before full release, but it is testable now if you want.
https://github.com/elixir-plug/plug/issues/599
https://github.com/elixir-plug/plug/issues/613