livebook/iframe/lib/livebook_space_web/plug.ex

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Elixir
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defmodule LivebookSpaceWeb.Plug do
use Plug.Builder
plug Plug.Static,
from: {:livebook_space, "priv/static/iframe"},
at: "/iframe",
# Iframes are versioned, so we cache them for long
cache_control_for_etags: "public, max-age=31536000",
headers: [
# Enable CORS to allow Livebook fetch the content and verify its integrity
{"access-control-allow-origin", "*"},
{"content-type", "text/html; charset=utf-8"}
]
plug Plug.Static, from: :livebook_space, at: "/"
plug :not_found
defp not_found(%{path_info: [], method: "GET"} = conn, _) do
call(%{conn | path_info: ["index.html"], request_path: "/index.html"}, [])
end
defp not_found(conn, _) do
send_resp(conn, 404, "not found")
end
end