PhoenixFramework HTTP/2

Phoenix Forum Questions / Help
42

Here’s the page shared by @ChaseGilliam from his github. Your site is broken brotha

Can someone please give a single example of actually sending an HTTP/2 Push? or even just a sample of checking if the client supports it? I can’t seem to find it ANYWHERE in the phoenix docs. do we have to use cowboy directly??

43

Phoenix removed support for http2 push before the release of 1.4 for reasons. It suggests Plug.Conn.push/3 as alternative.

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44

@SampsonCrowley yeah, that domain sadly expired and got scooped up while I was on vacation :frowning:. But, I put the site back up under a new domain https://by-cha.se. As @LostKobrakai mentioned, push was removed from Phoenix, but you can accomplish the same thing with Plug.Conn.push/3.

That said, you can get the same effect with less work using a CDN like Cloudflare.

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45

@ChaseGilliam @LostKobrakai Thanks! I actually did find it while i was waiting for forum permissions by looking through the cowboy plug github

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46

I found out the hard way you actually don’t have to use webpack-dev-server to get this going in development either. Phoenix is capable of pushing the resource directly from the build. webpack-dev-server really caused a lot of headache because I could not figure out why it was still using 1.1; until i realized that it can’t support http/2 if you’re using node >= 11.1

test sample from my own codebase:

page_controller.ex

defmodule DownUnderSportsWeb.PageController do
  use DownUnderSportsWeb, :controller

  def index(conn, _params) do
    push(conn, Routes.static_path(conn, "/js/shared-runtime.js"))
    push(conn, Routes.static_path(conn, "/js/vendors~app.js"))
    push(conn, Routes.static_path(conn, "/js/app.js"))
    push(conn, Routes.static_path(conn, "/css/app.css"))
    render(conn, "index.html")
  end
end

this works for both development and production, because it uses the normal asset pipeline to find the same resources it would without proxying it through webpack

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47

@ChaseGilliam I think your original domain is back up for purchase if you wanted it back

Edit: nevermind, I think it’s only available through the people that scooped it up in the first place

48

I’ll have to jump on that soon then.

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49

Can anyone point me to a good resource for updating my Phoenix project to use HTTP/2? Thanks!

50

The newer versions of Phoenix http2 push, you’ll need to use Plug.Conn.push/3 directly

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51

Would I typically call Plug.Conn.push/3 from my controller?

52

I don’t actually know, as I haven’t tried, but based on the docs that seems right.