Packages
phoenix_live_view
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1.0.16
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1.0.6
retired
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0.20.17
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0.15.0
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0.14.7
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0.14.2
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0.5.0
0.4.1
0.4.0
0.3.1
0.3.0
0.2.1
0.2.0
0.1.1
0.1.0
Rich, real-time user experiences with server-rendered HTML
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Files
lib/phoenix_live_view/plug.ex
defmodule Phoenix.LiveView.Plug do
@moduledoc false
alias Phoenix.LiveView.Controller
@behaviour Plug
@link_header "x-requested-with"
@response_url_header "x-response-url"
def link_header, do: @link_header
@impl Plug
def init(view) when is_atom(view), do: view
@impl Plug
def call(%{private: %{phoenix_live_view: {view, opts}}} = conn, _) do
opts = maybe_dispatch_session(conn, opts)
if live_link?(conn) do
html = Phoenix.LiveView.Static.container_render(conn, view, opts)
conn
|> put_cache_headers()
|> Plug.Conn.put_resp_header(@link_header, "live-link")
|> Plug.Conn.put_resp_header(@response_url_header, Phoenix.Controller.current_url(conn))
|> Phoenix.Controller.html(html)
else
conn
|> Phoenix.Controller.put_layout(false)
|> put_root_layout_from_router(opts)
|> Controller.live_render(view, opts)
end
end
@doc false
def put_cache_headers(conn) do
conn
|> Plug.Conn.put_resp_header("vary", @link_header)
|> Plug.Conn.put_resp_header(
"cache-control",
"max-age=0, no-cache, no-store, must-revalidate, post-check=0, pre-check=0"
)
end
defp maybe_dispatch_session(conn, opts) do
case opts[:session] do
{mod, fun, args} when is_atom(mod) and is_atom(fun) and is_list(args) ->
Keyword.put(opts, :session, apply(mod, fun, [conn | args]))
_ ->
opts
end
end
defp put_root_layout_from_router(conn, opts) do
case Keyword.fetch(opts, :layout) do
{:ok, layout} -> Phoenix.Controller.put_root_layout(conn, layout)
:error -> conn
end
end
defp live_link?(%Plug.Conn{} = conn) do
Plug.Conn.get_req_header(conn, @link_header) == ["live-link"]
end
end